| 单词 | chemical change |
| 例句 | Grain by grain, molecule by molecule, carbohydrate fuel in the form of glucose is fed into this wheel; in its cyclic passage the fuel molecule undergoes fragmentation and a series of minute chemical changes. Silent Spring 1962-09-27T00:00:00Z Subtle and vastly important chemical changes are constantly in progress, converting elements derived from air and water into forms suitable for use by plants. Silent Spring 1962-09-27T00:00:00Z A chemical change was taking place in him. The Heart is a Lonely Hunter 1940-07-29T00:00:00Z Plaque ruptures are thought to be influenced by outside factors including the chemical changes that occur with acute and chronic stress. More younger women are having heart attacks. Here are steps to minimize your risk. 2019-05-20T04:00:00Z “I would go into this calm — almost as if I could feel a chemical change in my body,” she said. Private Trauma Gives Jessica Stern Insights on Terrorism 2010-06-29T21:43:00Z This causes a chemical change in those cells that are used to receiving clean blood, and these protective mechanisms fail. A nice place to rest 2012-10-07T20:00:00Z The kiln is a crucible where chemical change takes place. Crafts Are Celebrated at Peekskill Clay Studios 2011-10-23T00:48:55Z But there’s no question that what the woman has said has effected a chemical change in their relationship. Theater Review: ‘Love and Information,’ by Caryl Churchill, at Minetta Lane 2014-02-20T03:00:14Z We are accustomed only to green—a durable pigment, hostile to chemical change—and to the unsmiling faces of Presidents and Founding Fathers. The Haunted Image of Harriet Tubman on the Twenty-Dollar Bill 2019-06-18T04:00:00Z Feeling Adele's pain, or recalling our own, may cause such chemical changes within us. Adele "30": The psychology of why sad songs make us feel good 2021-11-29T05:00:00Z Addiction causes chemical changes in the brain that remain long after a person stops using the substance, said Volkow, who described the condition as "a chronic disease with a very long duration." Hoffman among thousands of addiction victims 2014-02-03T23:39:37Z There used to be a green curtain behind her, but it has disappeared over time because of chemical changes in the paint. The Fullest View of Vermeer Still Leaves Plenty to the Imagination 2023-02-03T05:00:00Z This chemical change triggers the release of enzymes, which cheat the body by breaking apart high-energy bonds and stealing from its energy stores. A nice place to rest 2012-10-07T20:00:00Z Many chemical changes are also responsible, some of which resemble what happens when people are on Ozempic, although these similarities are not thought to be the main mechanism behind surgery’s effectiveness. Bariatric Surgery at 16 2023-10-31T04:00:00Z "This system could be used really anywhere where you're having large chemical changes in the body, where you want to measure those changes over time to better understand what's happening in the body," Downs said. Wearable sensor to monitor 'last line of defense' antibiotic 2023-10-03T04:00:00Z That difference is accounted for by physical or chemical changes in the brain’s structure. Forgotten Memories May Remain Intact in the Brain 2023-09-15T04:00:00Z For example, if groundwater gets too warm, it could kill or drive away animals, trigger chemical changes in the water and become a breeding ground for microbes. Underground Climate Change Is Weakening Buildings in Slow Motion 2023-07-11T04:00:00Z The high-temperature firing process produces a chemical change in the clay, creating an artificial rock of sorts. Why you should consider clay pavers over concrete bricks 2023-06-12T04:00:00Z RNA editing happens when an outside force activates certain enzymes inside the body’s cells that then make chemical changes to the RNA. Octopuses Redesign Their Own Brains When They Get Chilly 2023-06-08T04:00:00Z There’s evidence that people who have no Alzheimer’s symptoms have detectable chemical changes in their spinal fluid or blood that predict that Alzheimer's pathology has begun. A Neurologist Answers Questions Patients Might Have about the New Alzheimer’s Drug Lecanemab 2023-01-27T05:00:00Z The scientists did the study using data gathered since 1998 by tracking chemical changes in the Gulf of Maine. Loss of tiny organisms hurts ocean, fishing, scientists say 2023-01-19T05:00:00Z Grail's Galleri test uses genetic sequencing and artificial intelligence to scan blood samples for patterns of chemical changes associated with specific cancers. Cancer researchers question antitrust arguments against Illumina-Grail deal 2022-12-16T05:00:00Z They are produced in fall, products of a chemical change involving an increased concentration of sugars in the leaves. How to read tree leaves — the science of plants 2022-12-02T05:00:00Z What are the two principal differences between nuclear reactions and ordinary chemical changes? Chemistry 2019-02-14T00:00:00Z Photographic films are inefficient: only about 1% of the light that actually falls on the film contributes to the chemical change that makes the image; the rest is wasted. Astronomy 2016-10-13T00:00:00Z Although pearls are associated with the hue, pearlescent, that bears their name, chemical changes in the water that filters through the mollusk can alter the color of a resulting pearl. Pennsylvania man has purple pearl as an appetizer at Delaware restaurant 2022-08-16T04:00:00Z One is the mechanical breakdown of rock into smaller fragments, and the other is the chemical change of the minerals within the rock to forms that are stable in the surface environment. Physical Geology 2015-01-01T00:00:00Z As magma slowly rises and cools into solid rock, it undergoes physical and chemical changes in a process called magmatic differentiation. An Introduction to Geology 2017-01-01T00:00:00Z This violates Dalton’s postulate that that atoms are not created during a chemical change, but are merely redistributed. Chemistry 2019-02-14T00:00:00Z Light falling on the retina causes chemical changes to pigment molecules in the photoreceptors, ultimately leading to a change in the activity of the RGCs. Anatomy and Physiology 2013-06-19T00:00:00Z Wine in green bottles did not exhibit the same kind of chemical change, even after 50 days on the shelf, and wine stored out of the light remained almost completely stable. Don’t Let Your Wine Go to the Grocery Store Naked 2022-07-07T04:00:00Z Chemical weathering results from chemical changes to minerals that become unstable when they are exposed to surface conditions. Physical Geology 2015-01-01T00:00:00Z All the carbon dioxide helped kill off ocean dwellers by making the sea too acidic, as evidenced by chemical changes in shells and bones left behind by marine organisms. Feathers May Have Helped Dinosaurs Survive Their First Apocalypse 2022-07-01T04:00:00Z Chemical properties, such flammability and acidity, and chemical changes, such as rusting, involve production of matter that differs from that present beforehand. Chemistry 2019-02-14T00:00:00Z You can think of a catalyst as a chemical change agent. Anatomy and Physiology 2013-06-19T00:00:00Z A concussion, caused by a blow to the head or whiplash, occurs when the brain rattles or twists within the skull and brain cells stretch and shear, causing a chemical change. Perspective | How my dryer door gave me a concussion 2022-06-03T04:00:00Z The direct application of heat to the outside of each floret creates an actual chemical change, as the sugars and amino acids inside the vegetable rearrange themselves. The Dish Our Customers Will Never Let Us Take Off the Menu 2022-05-04T04:00:00Z During baking, these compounds undergo chemical changes, individually and together, that make them more likely to bond to the pan. How to remove cakes from Bundt, square, springform, loaf and other pans 2022-04-04T04:00:00Z The equation describing the overall reaction is the sum of these two chemical changes: Chemistry 2019-02-14T00:00:00Z “But because the hemoglobin in these carriers is no longer enclosed, it can undergo chemical changes that make it extremely reactive and toxic while circulating in blood, causing damage to tissues.” Synthetic blood substitute research advances rapidly 2022-04-16T04:00:00Z Genetics, chemical changes in the brain and stressful events are among factors believed to be responsible for depressive episodes. Depression affects about 280 million people worldwide 2022-02-27T05:00:00Z In addition to the chemical changes, there are also specialized receptors on the surface of muscle cells that detect when you move a muscle, generate force or otherwise alter the biochemical machinery within a muscle. Perspective | Why muscles change — and get weaker — with age, even when you work out 2022-02-12T05:00:00Z The prototype uses a battery-operated motor that transforms chemical changes on a strip into raised bumps. At-Home Coronavirus Tests Are Inaccessible to Blind People 2022-01-10T05:00:00Z Nuclear reactions usually change one type of nucleus into another; chemical changes rearrange atoms. Chemistry 2019-02-14T00:00:00Z Colder air helped trigger chemical changes in the leaves, and soon bold hues were all around. With colors popping, fall season is hopping — and it was worth the wait 2021-11-19T05:00:00Z Modern technologies can detect more subtle chemical changes, and machine learning algorithms can identify patterns in breath samples from people with certain diseases. A Covid Test as Easy as Breathing 2021-07-11T04:00:00Z “Superconducting electrons collapsed spontaneously into this two-dimensional system without any physical or chemical change or specific fabrication,” says lead author Carolina Parra, a physicist at the Federico Santa Maria Technical University in Chile. Electrons Can Form Bizarre 2-D ‘Flatland’ in Superconductor 2021-07-06T04:00:00Z And like other major origin events it involves the wholesale restructuring of the planetary environment, from the utilization of energy to fundamental chemical changes in atmospheres or oceans. The Origin of Technosignatures 2021-07-02T04:00:00Z Unlike balanced equations representing an overall reaction, the equations for elementary reactions are explicit representations of the chemical change taking place. Chemistry 2019-02-14T00:00:00Z There's a chemical change that takes place when a person is feeling overwhelming rage. Dr. Justin Frank on the trial: For Trump, Capitol riot was a source of "incredible pleasure" 2021-02-12T05:00:00Z They accrued data from previously studied zircons from around the globe—more than 14,000 in all—and plotted the chemical changes over time. Earth’s mountains may have mysteriously stopped growing for a billion years 2021-02-11T05:00:00Z Ripley might not actually have designed the original Scroll himself, but the images still shed light on how he and his contemporaries viewed matter and chemical change. Elixirs for times of plague and bullion shortage 2020-04-28T04:00:00Z The test looks for telltale chemical changes to bits of genetic code - cell-free DNA - that leak from tumours into the bloodstream. Blood test 'can check for 50 types of cancer' 2020-03-30T04:00:00Z Pure substances that cannot be broken down into simpler substances by chemical changes are called elements. Chemistry 2019-02-14T00:00:00Z More specifically, it focuses on chemical changes to this DNA, known as methylation patterns. New blood test can detect 50 types of cancer 2020-03-30T04:00:00Z Now imagine what a wanton cocktail of chemical changes could do to the mind. The Runaway Train of Cognitive Enhancement 2019-12-09T05:00:00Z Disturbing, because it reminded us that humans are driving global physical and chemical changes, including rising ocean temperatures and acidity, and in response, ecosystems are changing rapidly and unpredictably. Opinion | Removing protections for Tongass National Forest is exactly the wrong thing to do 2019-10-23T04:00:00Z Computational biologists produced a rough sketch of Denisovan anatomy based on chemical changes to the ancient humans’ DNA, cross-referenced with the known physical effects of certain genetic mutations in modern people. Daily briefing: Should we make a Green New Deal? 2019-09-19T04:00:00Z Compounds may be broken down by chemical changes to yield either elements or other compounds, or both. Chemistry 2019-02-14T00:00:00Z In an attempt to shed new light on Denisovans, experts studied methylation, or chemical changes, in ancient DNA to develop their reconstruction of the long lost human ‘cousins.’ Denisovans 'unveiled': This is what the long-lost human relative looked like 2019-09-19T04:00:00Z The epigenetic clock is measured by a record of chemical changes to an organism's DNA. Groudbreaking study accidentally reveals biological age may be reversible 2019-09-07T04:00:00Z She also finds "plausible" recent research that suggests the effects of trauma could be inherited by means of chemical changes to the surface of genes, altering the way they behave. The long echo of WW2 trauma 2019-06-07T04:00:00Z He discovered that chemical groups called phosphates within cells trigger a cascade of chemical changes that amplify the dopamine signal. Paul Greengard, Nobel Prize-Winning Neuroscientist, Dies at 93 2019-04-14T04:00:00Z The explosion of nitroglycerin is a chemical change because the gases produced are very different kinds of matter from the original substance. Chemistry 2019-02-14T00:00:00Z “We can lock onto the storm and follow it for days to weeks, monitoring the chemical changes,” he says. High-flying pseudosatellites get their day in the sun 2019-02-11T05:00:00Z “It takes some time to work it into the soil. A chemical change needs to occur. You want to do that ahead of time before you put any plants into the ground.” Fireplace ash can be a boost for garden soil, but be cautious | Produced by Advertising Publications 2019-01-10T05:00:00Z The brain’s response to these chemical changes make life difficult without the drug. Heroin Addiction Explained: How Opioids Hijack the Brain 2018-12-19T05:00:00Z Researchers at the University of Illinois sought to understand the chemical changes that occur in the brain for drug users that participate in an exercise regimen. Exercise lessens drug cravings in mice: Report 2018-11-14T05:00:00Z This chapter introduces many of the basic ideas necessary to explore the relationships between chemical changes and energy, with a focus on thermal energy. Chemistry 2019-02-14T00:00:00Z What Eaton and Cifelli discovered in Utah showed that life on land was unexpectedly becoming more diverse at a time when life in the oceans was being decimated by chemical changes. Shrinking the Grand Staircase-Escalante National Monument is a disaster for paleontology 2018-09-25T04:00:00Z Some of this kicking is the result of my frustration with the mining companies for causing such severe physical and chemical changes to the landscape. "Wild, Wonderful" West Virginia's Decapitated Mountains and Deformed Fish 2018-09-19T04:00:00Z The study seeks to understand the fuels; the smoke’s makeup, behavior and movement; and the chemical changes along the way. As wildfires rage, Trump administration plans to slash fire science funding 2018-08-05T04:00:00Z That and other chemical changes lowered DBEAQ’s capacity degradation loss to just 3% per year, the researchers reported this month in Joule. This ‘flow battery’ could power green homes when the sun goes down and the wind stops blowing 2018-07-31T04:00:00Z The formation of rust is a chemical change because rust is a different kind of matter than the iron, oxygen, and water present before the rust formed. Chemistry 2019-02-14T00:00:00Z It’s true that even “healthy” aging is accompanied by physical and chemical changes in the brain. Why science education for seniors is a boon for them — and for everyone else 2018-06-30T04:00:00Z Inflammation - in the form of a chemical change in the brain - is associated with Alzheimer's disease and the charity says there are suggestions that a diet high in antioxidants reduces the signs of this inflammation. The foods that might help with dementia 2018-04-23T04:00:00Z In a first-of-its-kind study, published January 8 in the Proceedings of the National Academy of Sciences, researchers looked at chemical changes in freshwater across the United States and southern Canada. North America's Waterways are Getting Saltier. That's a Big Problem. 2018-01-09T05:00:00Z Therefore, it is likely that high salinity is inducing chemical changes through these epigenetic mechanisms in Daphnia to suppress the function of its circadian clock. Can Road Salt and Other Pollutants Disrupt Our Circadian Rhythms? 2018-01-04T05:00:00Z An atom is the smallest unit of an element that can participate in a chemical change. Chemistry 2019-02-14T00:00:00Z These chemical changes were incited not by bacterial cells, but by the animals’ own cells. A New Antibiotic Weakness--Drugs Themselves Help Bacteria Survive 2017-12-04T05:00:00Z Another study of pregnant women by Columbia University researchers found that exposure to the chemical changes the brain structure of their children. Inside Scott Pruitt’s Mission to Remake the EPA 0002-11-29T05:00:00Z The Biological Impacts of Ocean Acidification report authors say some creatures may benefit directly from the chemical changes - but even these could still be adversely affected indirectly by shifts in the whole food web. CO2 rise 'will affect all sea life' 2017-10-22T04:00:00Z Such a system would shine light into the brain to directly read chemical changes. A Game You Can Control With Your Mind 2017-08-27T04:00:00Z Does the following chemical change represented by these symbols violate any of the ideas of Dalton’s atomic theory? Chemistry 2019-02-14T00:00:00Z Under previous approaches, a neutrino reveals itself by stumbling across a proton or neutron amidst the vast emptiness surrounding atomic nuclei, producing a flash of light or a single-atom chemical change. Ever-Elusive Neutrinos Spotted Bouncing Off Nuclei for the First Time 2017-08-03T04:00:00Z This sensitivity to small chemical changes highlights the non-intuitive relationship between molecular structure and the energy–structure landscape of a crystal. Functional materials discovery using energy–structure–function maps : Nature : Nature Research 2017-03-21T04:00:00Z They found that gut microbes mediate chemical changes to histone proteins, which in turn regulate gene expression by binding to DNA and altering its 3D conformation. Epigenetics: Gut microbes shape DNA : Nature : Nature Research 2016-11-29T05:00:00Z Horvath’s ageing “clock” relies on measuring a subtle chemical changes, in which methyl compounds attach or detach from the genome without altering the underlying code of our DNA. Internal 'clock' makes some people age quicker and die younger - regardless of lifestyle 2016-09-28T04:00:00Z This violates Dalton’s postulate that atoms are neither created nor destroyed during a chemical change, but are merely redistributed. Chemistry 2019-02-14T00:00:00Z Concrete heated to that temperature, though, doesn't undergo significant physical or chemical changes; it maintains most of its mechanical properties. How Building Design Changed After 9/11 2016-09-09T04:00:00Z In modern people, chronic stress and violence are known to boost chemical changes in DNA known as methylation, and Smith is looking for the same pattern in ancient genetic material recovered from Tung's skeletons. The Wari's grisly end—the fall of a South American empire 2016-08-17T04:00:00Z The thick layer allows for a more detailed reading of chemical changes within the sediments when they were buried. Crippled Atlantic currents triggered ice age climate change 2016-06-30T04:00:00Z Centers for Disease Control and Prevention, a blow to the head resulting in concussion can stretch and damage brain cells and create chemical changes in the brain. Almost 2 Million U.S. Kids Get Concussions a Year: Study 2016-06-20T04:00:00Z Does the following chemical change represented by these symbols violate any of the ideas of Dalton’s atomic theory? Chemistry 2019-02-14T00:00:00Z In a paper published in The Lancet in February 1916, he posited a “physical or chemical change and a break in the links of the chain of neurons which subserve a particular function.” What If PTSD Is More Physical Than Psychological? 2016-06-10T04:00:00Z The National Oceanic and Atmospheric Administration defines chemical changes in the ocean caused by carbon dioxide emissions as “ocean acidification.” Organizations to form ocean acidification group in Maine 2016-02-21T05:00:00Z His colleague Huw Morris, professor of clinical neuroscience at UCL, says scientists will then be able to look for the chemical changes that happen when a brain injury occurs. Hollywood tackles concussion head-on - BBC News 2016-02-05T05:00:00Z "They reveal extreme conditions in the atmosphere and promote chemical changes that lead to destruction of vital stratospheric ozone." Rare Shimmering Rainbow Clouds Appear Over the U.K. 2016-02-03T05:00:00Z The following chemical change represented by these spheres may violate one of the ideas of Dalton’s atomic theory. Chemistry 2019-02-14T00:00:00Z On 18 February, a consortium of more than 90 laboratories published a landmark catalogue of the chemical changes to DNA that are thought to influence whether and how genes are expressed. Epigenetics: The genome unwrapped : Nature : Nature Publishing Group 2015-12-01T05:00:00Z There’s some chemical change that responds to touch, that allows these leaves to close. The Crispr Quandary 2015-11-09T05:00:00Z Planetary bodies usually darken over time as a result of chemical changes triggered by sunlight and cosmic ray impacts. Pluto's moon Kerberos finally shows itself - BBC News 2015-10-23T04:00:00Z After fermentation we do a roasting right away, which sterilises everything and removes the microbes, but the chemical changes remain. The future of food: from jellyfish salad to lab-grown meat 2015-09-13T04:00:00Z From baking a cake to determining the useful lifespan of a bridge, rates of chemical reactions play important roles in our understanding of processes that involve chemical changes. Chemistry 2019-02-14T00:00:00Z This leads to a variety of chemical changes, such as making waters more acidic, which are referred to as ocean acidification. Crucial ocean-acidifcation models come up short 2015-08-04T04:00:00Z Friends of Casco Bay researcher Mike Doan says one of the main drivers of the chemical changes is increased runoff caused by higher rainfall. Report says chemistry of Casco Bay changing rapidly 2015-05-04T04:00:00Z When the neuroscientists took a closer look at the brain cells, they found that even when the synapse was erased, molecular and chemical changes persisted after the initial firing within the cell itself. Memories May Not Live in Neurons’ Synapses 2015-03-28T04:00:00Z Researchers reckon that PMS – which consists of physical and emotional symptoms during the days or even weeks before one’s menstrual period – is caused by fluctuations in hormones, or chemical changes in the brain. Is My PMS Normal? 2015-02-05T05:00:00Z It would create a small plume of sulphate particles and then measure the physical and chemical changes. Into the great wide open 2014-12-11T05:00:00Z Dr Lewis said that it was straightforward to forecast future chemical changes to the ocean. Science chief warns on acid oceans 2014-10-24T04:00:00Z Instruments should also detect some transient chemical changes, perhaps even some circulation changes. Orbiters on alert as comet skims Mars 2014-10-18T04:00:00Z And the chemical changes induced by dry roasting help explain what causes peanut allergy in the first place. Browned off 2014-09-25T04:00:00Z Scientists say chemical changes caused by dry roasting processes may prime the body's immune system - sparking future allergic reactions. Roast peanuts 'spark more allergies' 2014-09-21T04:00:00Z The researchers found similar chemical changes at SKA2 in people with suicidal thoughts or behaviors. Could a Blood Test Predict Suicide Risk? 2014-07-30T04:00:00Z But she warns that the biological effects of the chemical change in the oceans are harder to predict. Science chief warns on acid oceans 2014-10-24T04:00:00Z Also, while tenofovir needs to undergo chemical changes before it can take effect, integrase inhibitors go to work instantly; scientists believe that is what allows them to be effective even three hours after exposure. Gel Protects Monkeys From H.I.V. After Sex, Study Finds 2014-03-12T18:04:02Z Psychological stress triggers chemical changes in the body that impair the immune system. Having surgery? Many things patients are told to do aren’t necessary and can be harmful 2014-02-10T15:06:02Z Scientists say it is likely to be the high temperatures used to roast nuts that are responsible for the chemical changes that, in turn, prompt the allergic reactions. Roast peanuts 'spark more allergies' 2014-09-21T04:00:00Z The chemical changes act like a "thermostat" or "dimmer switch" to set an individual's pain sensitivity, Prof Spector added. Pain 'dimmer switch' discovered 2014-02-05T01:42:21Z Believing them to be hybrid compounds, and therefore amenable to chemical change in laboratory reactions, the alchemists pursued the dream of chrysopoeia to no avail. Fact or Fiction?: Lead Can Be Turned into Gold 2014-02-06T12:00:00Z The authors did not tackle questions about the impacts of being poor throughout a lifetime nor possible physical or chemical changes in the brain from long-term stress. Poor Choices: Financial Worries Can Impair One s Ability to Make Sound Decisions 2013-08-29T18:45:02.357Z The idea: Factors inside the womb seem to affect the dimmer switches that develop on a fetus' genes - chemical changes that make genes speed up or slow down or switch on and off. Mom's obesity surgery may help break cycle in kids 2013-05-27T19:24:08Z Scientists are now exploring methods to get rid of the particular chemical changes that may be responsible for kick-starting the immune system. Roast peanuts 'spark more allergies' 2014-09-21T04:00:00Z The research team found chemical changes within nine genes involved in pain sensitivity that were different in one twin but not in her identical sister. Pain 'dimmer switch' discovered 2014-02-05T01:42:21Z The Cologuard test looks for mutations and chemical changes in DNA indicative of cancer. New Test Detects Most Colorectal Cancers, Study Finds 2013-04-18T17:48:29Z The setting provided a perfect opportunity for Siegel to also track brain chemical changes triggered by the happy news that surgery for some patients would be possible. Are You Happy? You Might Have Hypocretin to Thank 2013-03-18T13:35:28Z Some theories suggest that chemical changes in the brain may be involved as well. PMS: Finding Relief 2013-02-09T15:00:00Z And these chemical changes, in turn, lead to abnormal brain connectivity and signs of anxiety and depression at age 18, suggests a study published today in Nature Neuroscience. Infant Stress Affects Teen Brain 2012-11-12T02:45:00.197Z The new study examined how dioxin exposure affects a person’s epigenome – a road map of chemical changes to DNA and associated proteins. Rats Harmed by Great-Grandmothers' Exposure to Dioxin 2012-09-27T16:15:00.257Z Epigenomics, based in Germany, recently applied for F.D.A. approval of a screening test that looks for a chemical change to one gene. New Test Detects Most Colorectal Cancers, Study Finds 2013-04-18T17:48:29Z Yet recent research suggests that more subtle chemical changes to our DNA occur as we age. Aging Is Recorded in Our Genes 2012-06-11T20:10:00Z Those wonderful chemical changes, in the absence of which there can be no life, in part, at least, depend upon the exposure of our bodies to light; let our windows, then, admit these life-giving rays. Principles of Decorative Design Fourth Edition 2012-05-22T15:16:52.423Z The chemical changes on which animal heat depends, and without which there can be no active vitality, cease with the cessation of respiration. The Contemporary Review, Volume 36, November 1879 2012-04-25T02:01:12.830Z From this result Thomson proceeded to calculate the electromotive forces required to effect chemical changes of different kinds, and those of various types of voltaic cell. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z Thus the chemical changes at work in sun-spot vapors were recognized. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z Heat, as we know, increases chemical change, in inorganic as well as organic matter; it hastens the disintegration of certain compounds, and alone renders it possible in many cases. A Review of the Systems of Ethics Founded on the Theory of Evolution 2012-03-17T02:01:00.033Z It has been argued, however, that often there is extensive chemical change owing to the introduction of matter from the granite into the rocks surrounding it. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z Zhang and his colleagues describe a cascade of chemical changes in the brain that might explain how THC binding to astrocytes results in memory deficits. Structured Unlearning: Marijuana May Impair Memory via the Brain's Non-Firing Cells 2012-03-01T17:15:00.197Z Silver enjoys in an equal degree with gold the quality of indestructibility, of divisibility, of malleability, and of resistance to chemical changes. Money: Speech of Hon. John P. Jones, of Nevada, On the Free Coinage of Silver; in the United States Senate, May 12 and 13, 1890 2012-02-29T03:00:21.727Z We're also looking at changes in the mineralogy, the chemical changes, and the physical changes over time. Scrutiny for fjord rock disposal 2012-02-23T15:53:49Z This solution is applicable only to mountains which contain coal, unless chemical changes in other minerals might be supposed capable of producing a similar effect. Oregon and Eldorado or, Romance of the Rivers 2012-02-07T03:00:09.010Z He may be reading Donnie’s body language or facial expressions, or he may be smelling some chemical changes in Iyal or hearing some noises from him that predict a tantrum. Wonder Dog: A Golden Retriever Reaches a Raging Boy 2012-02-03T15:17:45Z The comparison will be made on the healthfulness of constituents in combination, and the chemical changes they undergo in baking. Scientific American, Vol. XXXIX.?No. 24. [New Series.], December 14, 1878 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:31.783Z On the other hand, we cannot understand how this one state could ever experience a chemical change, if there did not exist a second state to affect it. The World As Will And Idea (Vol. 1 of 3) 2011-12-29T03:00:18.017Z An electric current manifests itself by heating the wire or conductor; by causing a magnetic field around the conductor and by causing chemical changes in a liquid through which it may pass. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z We know that this generalization holds good in all chemical changes. Heroes of Science Chemists 2011-12-09T03:00:21.047Z It is accomplished chiefly by solution, changes in temperature, the wedge-work of ice and roots, the borings of animals, and such chemical changes as surface water and air effect. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z We know what poisons are generated in the system by anger, and what chemical changes take place in a muscle that is tired. The Book of Life 2011-11-25T03:00:13.343Z Though so small, this little organism is really quite complicated in its structure, and within its little body there are carried on complicated chemical changes which baffle entirely the most learned chemist to imitate. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z The chemical changes are shown by the following analyses: H2O. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Black held that the chemical changes which occur when chalk is calcined are exactly analogous to those which he had proved to take place when magnesia is strongly heated. Heroes of Science Chemists 2011-12-09T03:00:21.047Z The "breaking down of the chlorophyll" is a chemical change that attends the ripening of a leaf. Trees Worth Knowing 2011-10-13T02:00:48.357Z Two years after Dunkard Creek suffered one of the worst fish kills ever in West Virginia or Pennsylvania, the reason for the chemical changes that spawned it remain a mystery. EPA Scientist Points at Fracking in Fish Kill Mystery 2011-10-12T19:15:04.860Z Even if there is a material equivalent or necessary concomitant, of electrical or chemical change in cerebral tissue or what not, the fact of the non-material experience remains a reality. Psychical Miscellanea Being Papers on Psychical Research, Telepathy, Hypnotism, Christian Science, etc. 2011-10-01T02:00:35.717Z Rocks composed of particles liable to little chemical change from the influence of moisture are best fitted to resist weathering, provided they possess sufficient cohesion to withstand the mechanical processes of disintegration. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Some said the change in color was due to the gum, others to chemical changes, others again said it was due to the atmosphere from the salt water. Canada: Its Postage Stamps and Postal Stationery 2011-09-18T02:00:28.007Z As drainage proceeds, with the chemical changes that accompany it, the pageant of autumn colors passes over the woodlands. Trees Worth Knowing 2011-10-13T02:00:48.357Z The study of the structure of molecules naturally leads to the study of their stability, and of the conditions which determine chemical changes, and thus opens the recently explored field of thermo-chemistry. Scientific Culture, and Other Essays Second Edition; with Additions 2011-09-17T02:00:31.747Z The chemical changes will be explained in subsequent chapters. Tobacco Leaves Being a Book of Facts for Smokers 2011-09-12T02:00:31.107Z On the earth itself there may remain for future discovery evidence of former operations by heat, magnetism, chemical change or otherwise, which may explain many of the phenomena with which geology has to deal. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z The only gene affected, apparently, was the one controlling growth, although, as you will see presently, other structural and chemical changes took place without which the growth could never have occurred. The Image and the Likeness 2011-08-23T02:00:33.617Z But the chemical changes that attend the migration of the carbohydrates and albuminous materials from the leaf back into twig and trunk and root for safe keeping go on no matter what the weather. Trees Worth Knowing 2011-10-13T02:00:48.357Z It only remains to ask, whether the “presence of the Saintly Man” could work a chemical change in tainted blood. The Gospel According to St. Mark 2011-08-20T02:00:14.427Z The housewife is thinking about the chemical changes caused by heat in meats, vegetables, and liquids. The Key to Success 2011-08-13T02:00:28.033Z The chemical changes are probably mainly, if not entirely, due to the moisture of the air, and particularly to the gases, vapours and organic matter which the moisture contains. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z When thus prepared they should be in a fit state to undergo in the body the physical changes comprised in mastication, and the chemical changes associated with the process of digestion. Household Administration Its Place in the Higher Education of Women 2011-07-20T02:00:13.547Z The powder itself should have good keeping qualities, that is, not be liable to chemical changes within ordinary ranges of temperature or in different climates when stored for a few years. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z Mrs. B. It arises from some chemical change, which takes place in the arrangement of the component parts; by which they lose their tendency to reflect certain colours, and acquire the power of reflecting others. Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained 2011-07-12T02:00:28.027Z In 2003, Scientific American published "What are the physical and chemical changes that occur in fireworks?" What Makes Them Go Boom? Our Favorite Explainers on the Science of Fireworks 2011-06-30T21:15:00.257Z In terms of applications, “the near-term use will be the monitoring of dynamic behaviors of particles in response to environmental and chemical changes at single particle resolution,” says Yang. Tiny Ring Laser Detects and Counts Nanoparticles 2011-06-29T14:12:00Z Inside the cells these particles undergo certain chemical changes, and are at least partially digested. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z In these powders slight chemical changes are generally followed by noticeable ballistic changes. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z The scientists at the workshop concluded that existing animal tests are inadequate for assessing whether a chemical changes breast development. Scientists Warn Chemicals May Be Altering Breast Development 2011-06-22T15:15:03.980Z The electron explains how the atoms of matter are united to one another, how different compound substances are formed, and how chemical changes take place. Autobiography of an Electron Wherein the Scientific Ideas of the Present Time Are Explained in an Interesting and Novel Fashion 2011-06-19T02:00:25.633Z This symmetrical distribution constitutes the best possible evidence that arthritis deformans is not a nutritional disease and, above all, is not due to chemical changes in the blood. Psychotherapy 2011-06-19T02:00:20.053Z Daguerre was led to experiments on chemical changes by solar radiations, with the hope of being able to apply the phenomena to the production of effects in his dioramic paintings. The International Monthly, Volume 4, No. 2, September, 1851 2011-06-14T02:00:20.590Z As all chemical changes are electric changes, a chemical laboratory is the same as an electric laboratory. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z The work, , required 130 strands of DNA to work in a cascade of programmed chemical changes. DNA computing takes logical leap 2011-06-02T18:11:58Z The rocks were shattered by changes of temperature, and at times at least crumbled by the freezing of absorbed water and also underwent chemical changes which softened and disintegrated them. North America 2011-05-05T02:00:20.027Z The chemical changes aren’t well understood, she says, and probably don’t lead to chunks of lithosphere getting more dense and breaking off. Grand Canyon Born by Continental Lift 2011-04-29T19:22:00Z The typical nervous symptoms of fever are thus produced, and the rate of chemical change in the tissues is accelerated, as is shown by the increased excretion of carbonic acid. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" 2011-03-14T03:01:00.580Z Now that Langley says there is only one radiant matter, and light, heat and chemical changes are all one entity, perhaps he may change his view. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z Twiss has suggested that the former be applied in regard to a change in physical properties, and the latter to the chemical change whereby sulphur is combined with the rubber. The Preparation of Plantation Rubber 2011-03-09T03:00:40.870Z When the heat which produced certain phases of metamorphism is sufficiently increased, greater freedom of molecular and chemical changes occur 327 and the material acted on passes to the condition of an igneous magma. North America 2011-05-05T02:00:20.027Z The presence of more blood than usual in the tissues and its slower flow gave occasion to more chemical changes in the part than before, and consequently to the production of more heat. Makers of Modern Medicine 2011-03-05T03:00:29.580Z Do we not, in these examples, gather strong intimations of a great law of chemical change in the universe? The Religion of Geology and Its Connected Sciences 2011-02-28T03:00:28.890Z It continually emits heat and light without combustion, without chemical changes of any kind, and without any change in its bulk, appearance or molecular structure, which remains identical after many months. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z Water thus slowly soaking often effects very considerable chemical changes. Geology 2011-02-20T03:00:12.660Z Certain ores and rocks contained in metamorphic terranes owe their concentration to previously acting processes of concentration, but have undergone chemical changes in place. North America 2011-05-05T02:00:20.027Z Pasteur showed that all these supposed chemical changes are really due to the presence of minute living cells, called ferments. Makers of Modern Medicine 2011-03-05T03:00:29.580Z So far as organic operations depend upon chemical changes,—and this is very far,—mathematics is the controlling power. The Religion of Geology and Its Connected Sciences 2011-02-28T03:00:28.890Z But he said the study found the diet induced chemical changes in the brains of fetuses that might be responsible for the problems in the offspring. Today?s Lab Rats of Obesity: Furry Couch Potatoes 2011-02-20T01:20:04Z The organic remains met with in the rocks have usually undergone some chemical change. Geology 2011-02-20T03:00:12.660Z In short, rocks are altered by heat, especially if water is present in them, by motion, and by chemical changes produced by percolating waters, and perhaps in still other ways. North America 2011-05-05T02:00:20.027Z The closeness with which the fodder is packed determines the nature of the resulting silage by regulating the chemical changes which occur in the stack. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" 2011-02-19T03:00:59.807Z Finally, geology discloses to us chemical change as a great animating, controlling, and conservative principle of the material universe. The Religion of Geology and Its Connected Sciences 2011-02-28T03:00:28.890Z The slow degradation of radium has been found by the latter to be concomitant with an evolution of heat, in amount enormous compared with other chemical changes. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z With other electrolytes similar phenomena appear, though the primary chemical changes may be masked by secondary actions. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Laws govern the chemical changes which take place, and can always be relied upon. The Century Cook Book 2011-01-04T03:01:10.367Z In chemical action also, combustion excites combustion, ferment excites ferment, infection communicates infection, and the similar chemical change is transmitted from molecule to molecule. The Scientific Basis of National Progress Including that of Morality 2010-12-30T03:00:25.567Z And in all known worlds, these chemical changes are at work unceasingly. The Religion of Geology and Its Connected Sciences 2011-02-28T03:00:28.890Z The similarity of certain groups of chemical changes, as, for example, combustion, and the inverse process, reduction, was observed, and thus led to an attempt to shape these most general facts into a common theory. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Similar relations were found to hold and the amounts of chemical change to be the same for the same electric transfer as in the case of solutions. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The irony is that the same UV rays that trigger vitamin D production in your body also produce chemical changes in the skin's DNA. Shunning the sun may harm your health 2010-12-21T18:34:04Z The imaging found suspicious chemical changes in the former athletes' brains. 'Virtual biopsy' may detect athletes' brain injury 2010-12-01T17:19:00Z It works like this: when tobacco hornworm caterpillars start munching on the plant, their saliva interacts with the G.L.V.’s, causing a chemical change to the G.L.V. compounds. Observatory: From a Desert Plant, a Scented Cry for Help 2010-08-30T21:50:00Z He realized that the sum total of the weights of all substances concerned within a chemical change is not altered by the change. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z When the applied electromotive force is diminished by an infinitesimal amount, the cell produces a current in the usual direction, and the ordinary chemical changes occur. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The rock probably went through less heating and bombardment when it was part of an asteroid than the previously studied meteorites did, the authors say, so it experienced less chemical change. Solar System Older Than Estimated 2010-08-24T14:48:00Z The chemical changes were not found in five healthy study participants. 'Virtual biopsy' may detect athletes' brain injury 2010-12-01T17:19:00Z In studies in obese mice, they found obesity activates a molecular switch called cdk5, which causes a chemical change in PPAR-gamma, triggering resistance to insulin and increasing blood sugar levels. Study raises hope for safer diabetes drugs 2010-07-21T19:38:00Z Luckily, the chemical changes were of a regular nature, allowing the researchers to write software that corrected for them. Neanderthal genes 'survive in us' 2010-05-06T18:02:00Z "We had to find a rock that had just enough iron to record a magnetic signature, but not so much that it would be affected by later chemical changes," Tarduno says. Geophysicists Push Age of Earth's Magnetic Field Back 250 Million Years 2010-03-04T19:28:00Z This elevation of temperature is a result of the various chemical changes which are constantly taking place in the system. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers Ac′tinism, the property of those rays of light which produce chemical changes, as in photography, in contradistinction to the light rays and heat rays. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide The effect may be mechanical only, or a chemical change may take place also. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The wood has undergone chemical changes, has lost much of its moisture, and often become very hard, as in bog oak. The Geological Story of the Isle of Wight The substance of a living being is also continually undergoing chemical change; it does not remain the same for a single instant. The Mechanism of Life They are not versed in those extraordinary modifications which can be produced in plants by chemical changes caused artificially in the nature of the sap. The New Gulliver and Other Stories As the result of chemical changes which occur in a muscle from contraction, certain substances are formed which depress or inhibit the power of contraction. The Social Gangster In a mixture there is no chemical change in the molecules of the substances mixed. Nature's Miracles, Volume 1 Familiar Talks on Science—World-Building and Life. Earth, Air and Water. The remains of ancient forests have been buried under sand stones and other rocks, have undergone chemical change, and been compressed into the hard solid mass we call coal. The Geological Story of the Isle of Wight All of the processes which constitute these activities—assimilation, translocation, metabolism, and respiration—involve definite chemical changes. The Chemistry of Plant Life According to Sherman, the chemical changes and energy transformations are of course inseparable. Dietetics for Nurses It is well known that many, perhaps all, of the substances of which the earth is composed are continually undergoing chemical changes. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology Water exists in different forms without, however, undergoing any chemical change. Nature's Miracles, Volume 1 Familiar Talks on Science—World-Building and Life. Earth, Air and Water. This function is performed by the leaves which contain the green colouring-matter known as chlorophyll, the presence of which is essential to the course of the chemical changes. Coal and What We Get from It Of the five steps in this process, the first two and the last are essentially purely physical phenomena, the chemical changes involved being those of the third and fourth steps. The Chemistry of Plant Life When the organisms or cells act directly and the chemical changes occur only in their presence, the fermentation is said to be due to an organized ferment. Dietetics for Nurses Electricity a source of volcanic heat.—It has already been stated, that chemical changes develop electricity; which, in its turn, becomes a powerful disturbing cause. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology In order to do this we have to put it through the process of "slacking," by pouring water upon it, and here another chemical change takes place. Nature's Miracles, Volume 1 Familiar Talks on Science—World-Building and Life. Earth, Air and Water. The exact course of the chemical change which occurs during the passage of wood into coal is at present involved in obscurity. Coal and What We Get from It The many theories which have been advanced concerning the nature of the chemical changes which are involved in photosynthesis have served as the basis for much experimental study of the problem. The Chemistry of Plant Life The blue rays are called actinic, and when we speak of actinic light we mean the blue rays which produce the chemical change in the sensitive plate. Harper's Round Table, May 21, 1895 To produce the colouration of the leaf just before it falls certain subtle chemical changes in its composition take place. Trees and Shrubs for English Gardens It is the energy that enables the leaf-green to produce a wonderful chemical change. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Love,—it is, we may say, a chemical change in the man, like the conversion of starch into sugar, or grape-juice into wine. The Atlantic Monthly, Volume 16, No. 95, September 1865 They constitute the active material of protoplasm, in which all of the chemical changes which go to make up the vital phenomena take place. The Chemistry of Plant Life As we watch the chemical change which takes place in the sensitive plate when covered with what we call the developer, we notice black patches appear here and there on the plate. Harper's Round Table, May 21, 1895 This equilibrium and the knowledge of the rate of decrease in general will have little value if this rate, like chemical changes, is subject to the influence of chemical and physical conditions. A Brief Account of Radio-activity And since the tissues of this new host were considerably different from those of the Bandersnatch, a great number of structural and chemical changes had to be made quickly. Insidekick Sugar is so important a substance in the chemical changes going on in the body that many other compounds have to be reduced to sugar before they are available as heat-making constituents. Maids Wives and Bachelors The characteristic difference between the reactions of inorganic compounds and those of organic substances lies in the rapidity, or velocity, of the chemical changes involved. The Chemistry of Plant Life We loosen the soil about the roots of plants to allow the air to penetrate and give an opportunity for the chemical changes constantly undergoing in the soil. The Apple An adult organism is continually doing certain things—performing certain movements, producing certain secretions, undergoing a great variety of physical and chemical changes. The Social Direction of Evolution An Outline of the Science of Eugenics Anger causes a chemical change which acts like poison to the system of an adult. The Colored Girl Beautiful The existence of a fundamental principle, unalterable and indestructible, prevailing alike through physical and chemical changes, was generally accepted. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Even under the stimulation of these reaction-accelerating agencies, most chemical changes in organic compounds when carried on in the laboratory, require several hours or even days and sometimes weeks, for their completion. The Chemistry of Plant Life These chemical changes and combinations take place only under certain circumstances, which, so far as they affect agriculture, will be considered in the following pages. The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools Maybe it’s one of those intricate psychical reactions, like a chemical change–I don’t know! In the Heart of a Fool The bite of an angry person is sometimes poisonous, because of this chemical change. The Colored Girl Beautiful This view, as applied to chemical changes, was first advanced by A.W. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" There can be no doubt that enzymes exert a tremendously important influence in vital phenomena, by determining the rate at which the chemical changes which are involved in these phenomena shall proceed. The Chemistry of Plant Life Where the particles touch each other, there is such a chemical change produced as renders them fit for the use of plants. The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools Certain chemical changes are produced as shown by gases, odors, and flavors. Canned Fruit, Preserves, and Jellies: Household Methods of Preparation U.S. Department of Agriculture Farmers' Bulletin No. 203 The value of each method depends on the fullness of distention of the udder and the arrest in larger part of the circulation and chemical changes in its tissues. Special Report on Diseases of Cattle We hence arrive at the result that an equation of the form reaction-velocity = chemical force/chemical resistance must also hold for chemical change; here we have an analogy with Ohm’s law. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Again, many investigators have concluded that at least one function of the anthocyanin pigments is to absorb heat rays and so to increase transpiration and other chemical changes. The Chemistry of Plant Life Describe the composition of phosphate of lime, and the chemical changes which take place in altering it to super-phosphate of lime. The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools Fungi undergo chemical changes so rapidly that even the cultivated mushroom may cause inconvenience if kept so long after being gathered as to undergo chemical change. Fungi: Their Nature and Uses Both actions are, I think, inexplicable, for however simultaneous the chemical changes may be, yet the causing power is the affinity of the acid for what has no existence. Modern Painters Volume II (of V) First and foremost, he demanded that the balance must be used in all investigations into chemical changes. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The human body is a laboratory in which chemical changes are constantly going on. Sex--The Unknown Quantity The Spiritual Function of Sex This condition is well calculated to advance the chemical changes necessary to prepare the matters—both organic and mineral—in the soil for the use of plants. The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools Certainly fungi are never so harmless, or seldom so delicious, as when collected from the bed, and cooked at once, before the slightest chemical change or deterioration could possibly take place. Fungi: Their Nature and Uses As the functions are anomalous, the chemical changes must also be anomalous, owing to the correlation of organs. Criminal Man According to the Classification of Cesare Lombroso Since, according to the molecular theory, in all cases of chemical change the action is between molecules, such symbols as these ought always to be employed. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" When you poured the hydrochloric acid on the zinc to make hydrogen, the flask became warm; the chemical change going on in the flask released heat energy. Common Science The chemical changes of the constituents of the rock. The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools Apicius here reveals himself as the consummate cook who is familiar with the finest detail of physical and chemical changes which food undergoes at varying temperatures. Cookery and Dining in Imperial Rome When all the lead sulphate has been used up by the chemical changes caused by the current, no further charging can take place. The Automobile Storage Battery Its Care And Repair Principles.—This section treats of such subjects as nomenclature, formulae, chemical equations, chemical change and similar subjects. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" And both plants and animals would die if light stopped helping to bring about chemical change. Common Science In the plant, this food undergoes such chemical changes as are necessary to growth. The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools The material dries by degrees, and is at last converted by a purely chemical change into a hard chalky substance, which in the course of time becomes of more than stony hardness. The Mother's Manual of Children's Diseases In the chemical changes that take place, the compounds just described are to a certain extent split up into the substances of which they are composed. The Automobile Storage Battery Its Care And Repair It is to be noticed that all these chemical changes cited took place in dilute aqueous solution, consequently the above order of acids refers only to the power to react under these circumstances. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The sunlight might continue to warm the earth, as we are not sure that the sun gets any of its heat from chemical change. Common Science It assists in some of the chemical changes necessary to prepare the matters in the soil for assimilation. The Elements of Agriculture A Book for Young Farmers, with Questions Prepared for the Use of Schools It is impossible, in the present state of science, to determine the chemical change which aliments undergo in the digestive organs; both on account of their mixture and the insufficiency of our means of analysis. North American Medical and Surgical Journal, Vol. 2, No. 3, July, 1826 The foregoing description gives the final products of the chemical changes that take place in the storage battery. The Automobile Storage Battery Its Care And Repair Temperature and Reaction-Velocity.—There are few natural constants which undergo so marked a change with temperature as those of the velocities of chemical changes. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The only reason we do not burn up is that it usually requires heat to start a chemical change. Common Science It is a chemical change; that is, one by which we get a new substance entirely unlike any of the substances united. Harper's Young People, September 14, 1880 An Illustrated Weekly It has always been held that some chemical change went on, but this theory they disproved. Poisoned Air Diffusion between the surrounding electrolyte and the acid in the plates keeps up the supply needed in the plates in order to, carry on the chemical changes. The Automobile Storage Battery Its Care And Repair They suffer from a chemical change in the condition of the blood cells, leading to anemia in the individual and to extinction of the lineage in the third generation. Introduction to the Science of Sociology Therefore the gas below the screen never got hot enough for the chemical change of oxidation, or burning, to take place. Common Science This state of keeping seems to be wholly owing to the curious chemical change that has taken place in their substance. The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland Water is the agent through which most mineral and chemical changes of rocks are accomplished. The Economic Aspect of Geology These chemical changes produce the electrical pressure which causes the current to flow, and the flow will continue until one or both of the substances are changed entirely. The Automobile Storage Battery Its Care And Repair G. W. Crile has offered a mechanistic interpretation of war and peace based on studies of the chemical changes which men undergo in warfare. Introduction to the Science of Sociology The food supply of the world depends on the fact that light can start chemical change. Common Science The blood when extravasated undergoes a chemical change before it is sufficiently fluid to be taken up by the lymphatic absorbents, and in that process changes its colour to green and then yellow. Zoonomia, Vol. II Or, the Laws of Organic Life The water may cause disastrous chemical changes in the minerals and by its freezing and thawing may cause splitting. The Economic Aspect of Geology When a battery discharges chemical changes take place by means of which electrical energy is produced. The Automobile Storage Battery Its Care And Repair Year after year, century after century, eon after eon, the mighty, immeasurable, ceaseless round of elements goes on, in the stupendous process of chemical change, which marks the eternal life of matter. Introduction to the Science of Sociology You will be able better to understand why all this would happen after you do the following experiments, the first of which will show that light helps the chemical change called bleaching or fading. Common Science I have seen toasted cheese brought up from the stomach 24 hours after it had been swallowed, without apparently having undergone any chemical change. Zoonomia, Vol. II Or, the Laws of Organic Life Through the agency of underground water most of the mineral and chemical changes of rocks are produced. The Economic Aspect of Geology Mineral peat consists of decomposing vegetable soil that has been so long in the neighbourhood of the medicinal spring that it has undergone peculiar and variable chemical changes. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" It is important, however, that the general principles underlying the process of manufacture and the chemical changes in the phosphate taking place during the process be clearly understood. Manures and the principles of manuring The plating of metals is made possible by the fact that electricity helps chemical change. Common Science The latter are so called from their power of inducing many chemical changes, such as the decomposition of water by chlorine, and the reactions upon which photographic processes depend. Notes and Queries, Number 183, April 30, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc Under conditions of extreme cold or extreme aridity, weathering takes the form mainly of mechanical disintegration, and chemical change is less conspicuous. The Economic Aspect of Geology Like albumins they may be eaten without having been previously cooked, and are unique in that they undergo no chemical change whatever as a result of ordinary degrees of heat. Health on the Farm A Manual of Rural Sanitation and Hygiene When leather is subjected to heat, a chemical change takes place, although no change in appearance may be noted at the time. Manual of Military Training Second, Revised Edition Just as electricity helps chemical changes in plating, it helps changes in a storage battery. Common Science Case-hardening, honeycombing, and cupping result directly from conditions 1, 4, and 5, and chemical changes of the outer surface. Seasoning of Wood The internal heat of the earth and the chemical changes which are constantly taking place in the interior of the globe, manifest themselves outwardly in the form of earthquakes and volcanoes. Complete Story of the San Francisco Horror Various chemical changes are by no means uncommon. Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis If, on the contrary, it has some effect, this is likely to be due to a chemical change which it has induced in the germ-plasm. Creative Evolution If no energy were released by chemical change, we should run down like clocks, and could never be wound up again. Common Science The outer surface of the wood appears to undergo a chemical change in the nature of hydrolization or oxidization, which alters the rate of absorption and evaporation in the air. Seasoning of Wood Another advantage of exposure is, to bring the peat into a state of more active chemical change. Peat and its Uses as Fertilizer and Fuel This being so we realize why, notwithstanding our sense of solidity and weight, chemical changes occur quite as readily in our organism as in the substances we see about us. Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis Cooking nuts too long sets up some chemical change that thins the creamy texture of the soup. Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950 This dissolved oxygen can easily combine with the dissolved iron; the solution helps the chemical change to take place. Common Science "Unless there is a chemical change brought about in the anteroom I shall be obliged to ask you to attend the door yourself." The Opened Shutters These bodies cannot be obtained in the pure state from peat, since they are mixed with more or less partially decomposed vegetable matters from which they cannot be separated without suffering chemical change. Peat and its Uses as Fertilizer and Fuel In many instances, either as a result of pressure or in consequence of chemical change in the sebaceous plugs or of the addition of a microbic factor, inflammation is excited and acne results. Essentials of Diseases of the Skin Including the Syphilodermata Arranged in the Form of Questions and Answers Prepared Especially for Students of Medicine "Beef fats is deposited in the tissue as beef fats without undergoing any chemical change whatever; mutton fat is deposited as mutton fat; lard as pig fat etc." Northern Nut Growers Association Report of the Proceedings at the 13th Annual Meeting Rochester, N.Y. September, 7, 8 and 9, 1922 Phosphorescence is almost always caused by chemical change. Common Science By storing, certain chemical changes take place in the bulb, which render it more nutritious and palatable. The Stock-Feeder's Manual the chemistry of food in relation to the breeding and feeding of live stock The substances which rapidly induce chemical change in peats, are of two kinds, viz.: Peat and its Uses as Fertilizer and Fuel The most powerful voltaic combinations are formed by substances that act chemically with most energy upon each other, and such substances as undergo no chemical changes in the combination exhibit no electrical powers. The World's Greatest Books — Volume 15 — Science All states of body and mind involve constant molecular and chemical change. Genuine Mediumship or The Invisible Powers And it is the electric energy caused by the chemical change in batteries that runs submarines, electric automobiles, flashlights, and doorbells. Common Science Now, I have no faith in honey undergoing any chemical change in the stomach of the bee,14 and cannot recommend this as the honest course. Mysteries of Bee-keeping Explained The inorganic constituents of the soil are obtained as the result of a succession of chemical changes going on in the rocks which protrude through the surface of the earth. Elements of Agricultural Chemistry Hence it was supposed that the electrical powers of metals were entirely due to chemical changes; but this is not the case, for contact produces electricity even when no chemical change can be observed. The World's Greatest Books — Volume 15 — Science The laws which govern chemical changes have been resolved into those of attraction or affinity. James Cutbush An American Chemist, 1788-1823 The gas requires more room than the powder and is further expanded by the heat released by the chemical change. Common Science He had been explaining the chemical changes that follow each stage of the boiling in sugar. The Daughter of a Magnate The air which thus enters acts on the organic matters of the soil, producing carbonic acid, which we have already seen is so intimately connected with many of its chemical changes. Elements of Agricultural Chemistry Radiant matter has the power of producing chemical changes partly through its heating power, and partly through some other specific and peculiar influence. The World's Greatest Books — Volume 15 — Science Thus, throughout all the physical and chemical changes that Matter may undergo in the universe, there is no actual loss in weight or quantity. Aether and Gravitation Those who think most profoundly on this subject hold that a chemical change, which, strictly interpreted, is atomic motion, is, in such a case, propagated along the nerve, and communicated to the brain. Fragments of science, V. 1-2 The chemical change consists in the formation of ferric tartrate. Photographic Reproduction Processes The original rock "weathered," undergoing physical and chemical change. Crops and Methods for Soil Improvement And the quality of the secretions determines the chemical changes which constitute all cellular growth. Little Journeys to the Homes of the Great Philosophers, Volume 8 The actual cause of this curious chemical change or substitution is not known with certainty, but it is interesting to note the conditions in which such changes do occur. The Chemistry, Properties and Tests of Precious Stones If this be so, the greatness of the chemical changes that have taken place in the pus ceases to be surprising. Fragments of science, V. 1-2 The chemical changes which produce the blue precipitate is quite complicated. Photographic Reproduction Processes The brain and nerves are framed of such materials and in such arrangements, that the chemical changes constantly in progress under the control of life, determine in them currents of thought and feeling. Blackwood's Edinburgh Magazine, Volume 61, No. 379, May, 1847 All that saddens, embitters and disappoints produces this chemical change that makes for death. Little Journeys to the Homes of the Great Philosophers, Volume 8 The most careful examination has proved that the process of germination consists essentially of various chemical changes, which require for their development the presence of air, moisture, and a certain degree of warmth. Farm drainage The Principles, Processes, and Effects of Draining Land with Stones, Wood, Plows, and Open Ditches, and Especially with Tiles It affords direct mechanical relief, and, by a stimulation of the part, promotes the chemical changes necessary for bringing the diseased tissues to a healthy condition. Special Report on Diseases of the Horse The more transparent the material, the more rapid the chemical changes. Photographic Reproduction Processes “He was explaining to Elliott and me the chemical change that takes place in the leaves, that makes the beautiful autumn colours we were admiring so much,” said Rose. Janet's Love and Service If electrodes of opposite polarity are placed in such an acid solution, a chemical change is produced, which is transformed into electricity. Electricity for Boys "You mean to say you don't know what two-fold chemical change Lot's wife underwent?" Ruth Fielding and the Gypsies The Missing Pearl Necklace Upon standing or drying the husk becomes black as further chemical changes occur. Northern Nut Growers Association Thirty-Fourth Annual Report 1943 They are even objectionable, for dampness is absolutely necessary to promote the chemical changes by which the image is developed. Photographic Reproduction Processes Of the causes of this lessened functional efficiency we may quote from Miss Goldmark's painstaking study: During activity, as will be shown later, the products of chemical change increase. Human Traits and their Social Significance But when an accumulator is charged by a current of electricity, a chemical change is gradually produced in the active element of which the accumulator is made. Electricity for Boys He pointed out that the external stimulus—instead of causing, as was customary to suppose, an explosive chemical change and an inevitable run-down of energy—brings about an accumulation of energy by the plant. Sir Jagadis Chunder Bose His Life and Speeches A vital chemical change which would be perfectly healthy in one tissue or organ, in another may be fatal. Preventable Diseases It requires little explanation to show how such a diseased state of the pulmonary organs, as has been described, should produce such results, by impeding the necessary chemical change of the blood. An Investigation into the Nature of Black Phthisis or Ulceration Induced by Carbonaceous Accumulation in the Lungs of Coal Miners The men looked on for a moment in silence, while Glynn drank, as if they expected some remarkable chemical change to take place in his constitution. The Red Eric Mental discords not only prevent sound sleep but also leave in the blood poisonous waste from the chemical changes which in turn dulls and impairs the brain action. Pushing to the Front By a slow chemical change, it has combined during so many ages with substances which give it, as a rule, a more solid and lasting texture than simple asphaltum. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Out of the varying chances of its warfare is born that incessant ebb and flow of chemical change, that inability to reach an equilibrium, which we term "vitality." Preventable Diseases Under suitable conditions they multiply rapidly, deriving the energy for their life processes from the chemical changes which they induce. Human Foods and Their Nutritive Value How to distinguish between physical and chemical changes. An Elementary Study of Chemistry Fermentation: a chemical change produced by bacteria, yeast, etc. Agriculture for Beginners Revised Edition After an egg is laid, a chemical change begins to take place, and more or less gas is formed. The Wonder Island Boys: The Tribesmen The moisture rises during the day from ocean, and lake, and river, undergoes a chemical change in God's laboratory and returns nightly in dew to refresh the earth. Quiet Talks on Power In causing chemical changes, the ferment gives none of its own material to the reacting substance. Human Foods and Their Nutritive Value The term oxidation is applied to the chemical change which takes place when a substance, or one of its constituent parts, combines with oxygen. An Elementary Study of Chemistry If you recall, we spoke about the actinic rays which cause the chemical changes on the photographic plate. The Wonder Island Boys: The Mysteries of the Caverns A substance used to effect a chemical change in another substance. The Wonder Island Boys: Exploring the Island I have always understood that pure iodide of silver was quite insensible to the action of light, or to any other chemical change, as far as the action of atmospheric air was concerned. Notes and Queries, Number 190, June 18, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. After becoming soluble, the organic matter undergoes further chemical changes, as oxidation and nitrification caused by bacteria. Human Foods and Their Nutritive Value The term is sometimes used, however, in a broader sense to designate any chemical change attended by the evolution of heat and light. An Elementary Study of Chemistry It is somewhat more active than iron in many chemical changes—notably it has what is apparently a stronger attraction for oxygen and sulphur than has iron. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The stimulus is chemical in its action; this means that the ether waves, on striking the retina, cause a chemical change which sets up the nerve current responsible for the sensation. The Mind and Its Education According to Dr. Bowman, the wool fibre really undergoes a slight chemical change at this temperature, which becomes more obvious at 230��F., while at about 260��F. the fibre begins to disintegrate. The Dyeing of Woollen Fabrics If the organic matter contain a large amount of nitrogenous material, particularly of proteid origin, a series of chemical changes induced by bacterial action takes place, resulting in the production of nitrites. Human Foods and Their Nutritive Value Since the energy possessed by coal only becomes available when the coal is made to undergo a chemical change, it is sometimes called chemical energy. An Elementary Study of Chemistry The air can more readily penetrate through the interstices in the soil, and, in consequence, chemical changes in the soil favorable to plant growth are facilitated. Clovers and How to Grow Them Instead of an original central heat he supposes that "we may perhaps refer the heat of the interior to chemical changes constantly going on in the earth's crust." Fables of Infidelity and Facts of Faith Being an Examination of the Evidences of Infidelity It is precisely in this long sequence of physical and chemical changes that the astrophysicist and the astrochemist can find the means of pushing home their attack. The New Heavens The cooking should be sufficiently prolonged and the temperature high enough to effectually disintegrate and soften all of the tissues, but not to cause extended chemical changes. Human Foods and Their Nutritive Value Many properties of a substance can be noted without causing the substance to undergo chemical change, and are therefore called its physical properties. An Elementary Study of Chemistry But as an article of sustenance Rice is not well suited for persons of fermentative tendencies during the digestion of their food, because its starch is liable to undergo this chemical change in the stomach. Herbal Simples Approved for Modern Uses of Cure For instance, it is part of the function of the liver to bring about chemical changes in albuminous foods which make it possible for the tissues to assimilate these. Vitality Supreme Milk, too, may give rise to gastro-intestinal irritation from the occurrence in it of chemical changes. Aids to Forensic Medicine and Toxicology The soluble ferments induce chemical change by causing molecular disturbance or splitting up of the organic compounds, resulting in the production of derivative products. Human Foods and Their Nutritive Value They also bring about chemical changes in substances placed near them. An Elementary Study of Chemistry If we could see the molecular and chemical changes and transformations that are going on around us, another world of instability would be revealed to us. The Last Harvest It also has much to do with bringing about certain chemical changes in sugar or dextrose. Vitality Supreme Another difference is that certain foods undergo chemical change while being absorbed. Physiology and Hygiene for Secondary Schools In order to secure a chemical change, a physical change must often precede, and a bacteriological change cannot take place without causing a change in chemical composition; the three are closely related and interdependent. Human Foods and Their Nutritive Value In the course of the metallurgy of zinc the cadmium compounds undergo chemical changes quite similar to those of the zinc compounds, and the cadmium distills along with the zinc. An Elementary Study of Chemistry Creeping through the rocks, and moving from zones of one temperature to another, these waters bring about in the fine interstices chemical changes which lead to great alterations in the constitution of the rock material. Outlines of the Earth's History A Popular Study in Physiography Next in importance are the chemical changes which take place in this life-giving fluid as it passes through the lungs. Vitality Supreme For causing the chemical changes that occur in the storage of foods, as well as the oxidations at the cells, the presence of active agents, or enzymes, is necessary. Physiology and Hygiene for Secondary Schools Prolonged high temperature in the cooking of proteids and starches is unnecessary in order to induce the desired chemical changes. Human Foods and Their Nutritive Value Is a chemical change always accompanied by a physical change? An Elementary Study of Chemistry Others are probably due to the slight motion brought about through the chemical changes of the rocks, which are continuously going on. Outlines of the Earth's History A Popular Study in Physiography I can understand that if you place a person in contact with an instrument and proceed to change his circulation by arousing his emotions that chemical change might be registered upon a sensitive plate. Suzanna Stirs the Fire It is known, however, to be a highly complex substance and to undergo chemical change readily. Physiology and Hygiene for Secondary Schools All these chemical changes are the result of ferment action. Human Foods and Their Nutritive Value Is a physical change always accompanied by a chemical change? An Elementary Study of Chemistry The alterations of the rocks which are involved in chemical changes are favoured by such motions. Outlines of the Earth's History A Popular Study in Physiography The light produces chemical changes on the retina. The Science of Human Nature A Psychology for Beginners It is necessary in the blood and lymph to keep their constituents in solution, and is thought to play an important rôle in the chemical changes of the cells. Physiology and Hygiene for Secondary Schools During cooking, as discussed in Chapter II, extensive physical and chemical changes occur, and these in turn affect digestibility. Human Foods and Their Nutritive Value When a given substance undergoes a chemical change it is possible to represent this change by the use of such symbols and formulas. An Elementary Study of Chemistry Again, a slight rise of temperature may be a sufficient inciting power to occasion extensive chemical changes in a collocation of elements otherwise stable; a spark is enough to explode a powder magazine. Logic Deductive and Inductive There are physical changes in matter, there are chemical changes, and there is a third change, as unlike either of these as they are unlike each other. The Breath of Life It has been recently shown that many of the chemical changes in the tissues are in all probability due to the presence of enzymes. Physiology and Hygiene for Secondary Schools Give the three chemical changes that take place in its preparation. Human Foods and Their Nutritive Value When a chemical change takes place in a substance the substance is said to undergo a reaction. An Elementary Study of Chemistry So far as modern science is able to tell, chemical changes are in constant progress in all these forms of underground life, preparing for the coming glory of the living green. Some Winter Days in Iowa We know that an electric current will bring about chemical changes otherwise impracticable. The Breath of Life As a final and all-important result, there is kept up a continuous series of chemical changes in the cells. Physiology and Hygiene for Secondary Schools At a temperature of about 120° C. starch begins to undergo chemical change, resulting in the rearrangement of the atoms in the molecule with the production of dextrine and soluble carbohydrates. Human Foods and Their Nutritive Value When perfectly dry sulphuric acid is treated with perfectly dry sodium hydroxide, no chemical change takes place. An Elementary Study of Chemistry The chemical changes, produced by cooking food properly, aid digestion, beside destroying any germs which may be contained in the food. Public School Domestic Science On the other hand, when the chemist wishes to preserve a living substance from chemical change, he transfers it from a state of solution into a solid state. The Breath of Life It was as if she suffered some chemical change before their eyes. The Portion of Labor They are divided into two large classes: the sucrose group and the dextrose group, the latter being produced from sucrose, starch, and other carbohydrates by inversion and allied chemical changes. Human Foods and Their Nutritive Value When the current passes through an electrolyte some chemical change always takes place. An Elementary Study of Chemistry First, then, in all known chemical changes in which oxygen gas is absorbed and carbonic acid gas formed, heat is produced. Consolations in Travel or, the Last Days of a Philosopher Chemical changes, undoubtedly, but what brings about the chemical changes? The Breath of Life The chemical changes would in that case have been different. Fashionable Philosophy and Other Sketches The insoluble ferment secretes an enzyme which induces a chemical change, modified by the further action of the soluble ferment. Human Foods and Their Nutritive Value Since equations are simply a kind of shorthand way of indicating chemical changes which occur under certain conditions, in reading an equation the full statement for which it stands should be given. An Elementary Study of Chemistry In every species of chemical change, temperature is concerned. Consolations in Travel or, the Last Days of a Philosopher There are any number of chemical changes or reactions in a living body, but are the atoms and molecules that are involved in such changes radically changed? The Breath of Life By the term chemical properties we have reference to the chemical composition of the soil, the chemical changes which take place in the soil, and the conditions which influence these changes. The First Book of Farming The dried fruit has a slightly different composition from the fresh fruit because of loss of the volatile and essential oils, and minor chemical changes which take place during the drying process. Human Foods and Their Nutritive Value The use of symbols and formulas in expressing chemical changes has another great advantage. An Elementary Study of Chemistry No change in sensible qualities can ever indicate with precision the nature of chemical change. Consolations in Travel or, the Last Days of a Philosopher The chemist equally regards chemical change in a as the effect of the action of something external to the body changed. Lay Sermons, Addresses and Reviews The chemical changes which make the plant foods available are dependent on moisture, heat, and air with its oxygen, and are therefore dependent largely on texture, and therefore on tillage. The First Book of Farming Name the eight chemical changes that take place during bread making. Human Foods and Their Nutritive Value A group of elements which in this way constitutes a part of a molecule, acting as a unit in a chemical change, or forming ions in solution, is called a radical. An Elementary Study of Chemistry A long interment followed, during which a course of chemical changes, and new combinations of their vegetable elements, converted them to the mineral condition of coal. A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery. With a Short Explanation of Some of the Principal Natural Phenomena. For the Use of Schools and Families. Enlarged and Revised Edition. The exact chemical changes it thus effects are not at present clearly known; but the fermentative action is manifestly concurrent with its multiplication. Scientific American Supplement, No. 643, April 28, 1888 A chemical change must take place in it and the nitrogen be built into nitric acid and nitrates. The First Book of Farming The yeast plant causes a number of chemical changes to take place, as conversion of starch to a soluble form and alcoholic fermentation. Human Foods and Their Nutritive Value Give two or more characteristics of a chemical change. An Elementary Study of Chemistry They knew nothing regarding the composition of water or the atmosphere, of the cause of thunder and lightning, or of the chemical changes effected in soils by the action of bacteria. Myths of Babylonia and Assyria Were it not for the chemical changes brought about by heat, many of our present foods would be useless to man. General Science Indirectly through these factors it aids the work of the beneficial soil bacteria and the chemical changes in the process of preparing plant food for crop use. The First Book of Farming Why are chemical changes, as hydration, often desirable in the cooking and preparation of foods? Human Foods and Their Nutritive Value Give examples of chemical changes which are produced through the agency of heat; of light; of electricity. An Elementary Study of Chemistry The saliva has the power of causing the chemical change to occur at once, and the molecule of water enters into the starch molecule and forms sugar. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity The tree is thus, during the winter, in a period of rest and only a few chemical changes take place which lead up to the starting of vegetation. Studies of Trees Aid chemical changes which make plant food available. The First Book of Farming To what extent is the energy of fuels utilized for producing mechanical and chemical changes in foods during cooking? Human Foods and Their Nutritive Value Attention has frequently been directed to the fact that chemical changes are usually accompanied by heat changes. An Elementary Study of Chemistry Now we do not understand how this saliva possesses this power to induce the chemical change. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity Under favoring conditions, protoplasm has a power of performing chemical changes, which result in producing heat far more gently and continuously than it is produced by the combustion of inorganic bodies. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky Black lines appeared on the paper, showing that the surface was undergoing chemical change from the action of some invisible and hitherto unknown force! Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World Thus it is that a food, when placed in a refrigerator or in cold storage, continues to undergo chemical change. Human Foods and Their Nutritive Value If steam is heated to 2000° and again cooled, has any chemical change taken place in the steam? An Elementary Study of Chemistry The changes are always chemical changes and are the result of chemical forces. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity Certain chemical changes had also a share in the transformation from soft mud to hard rock, which need not be here considered. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky A chemical body which by its presence, is capable of inducing chemical changes in other bodies while itself remaining unchanged. More Toasts Compression and chemical changes induced in the surrounding material operated on. Nitro-Explosives: A Practical Treatise The only exceptions are rare cases in which such active chemical changes take place in the dead body that heat is generated by chemical action. Disease and Its Causes The food, as the result of chemical change, has become soluble, and after being dissolved it is dialyzable—i.e., capable of osmosis. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity Even if already liquid it has generally to undergo a chemical change before being fitted for absorption into the body. The Chemistry of Food and Nutrition A compact clay, which excludes alike air, water, and roots, forbidding all chemical changes, is not the soil for Indian corn. The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. Compression and chemical changes induced in surrounding material. Nitro-Explosives: A Practical Treatise The varied and active chemical changes which are taking place cannot be observed. Disease and Its Causes This substance he proved to be endowed with powers of motion and powers of inducing chemical changes associated with vital phenomena. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity Digestion.—The digestive juices contain certain unorganised ferments, which produce chemical changes in the food. The Chemistry of Food and Nutrition During the coming season it is proposed to analyze the water draining from this mass of fermenting refuse; and we may then learn more than we now know about the chemical changes above mentioned. Scientific American Supplement, No. 832, December 12, 1891 Every three or four weeks a new ovum or egg matures in the ovary and undergoes certain chemical changes, which send into the blood a substance called a hormone. Outwitting Our Nerves A Primer of Psychotherapy By functional disease there is expressed merely that no anatomical or chemical change is discoverable in the material which gives the unusual reaction. Disease and Its Causes Digestion of food is simply a chemical change therein. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity Like growth, rather than chemical change; the wilderness was turning to iron. The Silent Places Six glands pour saliva into the mouth, where it should be—but how rarely is—mixed with the food, causing chemical changes, and moistening the bolus to pass easily down. Epilepsy, Hysteria, and Neurasthenia Their Causes, Symptoms, & Treatment Glycerin—absolutely a sugar, or a substance similar to sugar—comes out of the tallow in this chemical change. The Chemical History of a Candle At a varying interval after death, usually within twelve hours, there is a general contraction and hardening of the muscles due to chemical changes, probably of the nature of coagulation, in them. Disease and Its Causes The digestive fluids of the mouth and stomach contain certain substances which possess a somewhat remarkable power, inasmuch as they are able to bring about the chemical changes which occur in the digestion of food. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity Lavoisier had formed a clear, consistent, and suggestive mental picture of chemical changes. The Story of Alchemy and the Beginnings of Chemistry In so doing they set up chemical changes in their substances. Scientific American Supplement, No. 787, January 31, 1891 It is true that mental effort, intellectual work, is accompanied by transformations of matter, chemical changes in the brain, and by transformations of energy. A Book of Exposition The joy was so keen and yet peaceful, familiar, and subjective that I could not help comparing it to a happy chemical change in the tissues of my own brain. Studies in the Psychology of Sex, Volume 5 Erotic Symbolism; The Mechanism of Detumescence; The Psychic State in Pregnancy The change of starch into sugar is thus a simple chemical change occurring under the influence of chemical affinity under certain conditions. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity These descriptions of elements and compounds also enable chemists to form a clear picture to themselves of any chemical change. The Story of Alchemy and the Beginnings of Chemistry The animal and the plant alike require food to repair waste, to build up new tissue and to provide material which, by chemical change, may liberate the energy which appears in the processes of life. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 It is just so with the rock mass; but in the case of a chemical change you start with one thing and end with another. The Library of Work and Play: Gardening and Farming. In many chemical changes the atoms divorce themselves, each forsaking its mate or mates, and seeking some newer affinity in the shape of a more congenial atom. A Series of Lessons in Gnani Yoga Each of the digestive juices contains a ferment which brings about a chemical change in the food. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity The theory thus prepared the way for the representation of a chemical change as an interaction between definite kinds of substances, marked by precise alterations both of properties and composition. The Story of Alchemy and the Beginnings of Chemistry Regulation of Temperature.—The heat of the body is generated by the chemical changes—those of oxidation—undergone not by any particular substance or in any one place, but by the tissues at large. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 So in the case of chemical change a certain something is started with and in the end we have an entirely different thing. The Library of Work and Play: Gardening and Farming. In the intense heat numerous chemical changes take place and the substances that come out of the furnace are entirely different from those contained in the fresh food. The Dollar Hen Or, again, we may look upon the cell as a little chemical laboratory, where chemical changes are constantly occurring. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity Udayana points out that the solar heat is the source of all the stores of heat required for chemical change. A History of Indian Philosophy, Volume 1 The chemical changes upon which the procedures of analytical chemistry depend are almost exclusively those in which the reacting substances are electrolytes, and analytical chemistry is, therefore, essentially the chemistry of the ions. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes There are several theories offered as explanations of what happens, but no one of them has been generally accepted, although the theory of chemical change seems to be receiving the strongest support at present. How to Teach This may be because of chemical changes that occur in curing or simply because of greater palatability. The Dollar Hen These changes we do not indeed understand, but they are undoubtedly chemical changes. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity The chemical changes which have taken place in the beds of vegetation of the carboniferous epoch, and which have transformed it into coal, are even now but imperfectly understood. The Story of a Piece of Coal What It Is, Whence It Comes, and Whither It Goes They have power to cause chemical changes, hence are known as the chemical or actinic rays. Hero Tales of the Far North Animal heat, the heat produced by the chemical changes which go on in the animal system, the intensity depending on the activity of the process. The Nuttall Encyclopædia Being a Concise and Comprehensive Dictionary of General Knowledge |
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