| 单词 | colloidal |
| 例句 | Why would the public believe such far-fetched and potentially dangerous advice as drinking colloidal silver or gargling with bleach to prevent coronavirus? Perspective | Garlic and bleach won’t cure coronavirus. How such myths originated — and why they’re wrong. 2020-03-09T04:00:00Z The coroner reported that her cause of death was a combination of alcohol abuse, anorexia and chronic colloidal silver ingestion, which she sold as supplements. What’s on TV This Week: ‘BlackBerry’ and ‘Jay-Z and Gayle King: Brooklyn’s Own’ 2023-11-13T05:00:00Z To reduce redness, Adams fills a sterilized eyecup with antibacterial colloidal silver and rosewater. How to Look Well Rested (Even When You’re Not) 2018-07-10T04:00:00Z Hairstylist and groomer Jon Chapman suggests an antibacterial face wash and a colloidal silver antibacterial gel to calm any inflammation down, and beard oil to soften the hair. ‘Remember to smile with your eyes’: how to stay safe and look great in a face mask 2020-07-18T04:00:00Z Throughout the novel, there’s a keen attentiveness to viscera, blood and bodily wounds; at one point, a man’s swollen lips are “covered by glistening, colloidal spores, canker sores and blisters like wounds of boiling water.” ‘The Antiquarian,’ a Macabre Novel About a Search for Truth 2014-06-09T04:00:00Z But several weeks ago he walked into the gallery at the Getty Museum where the column now rises, its deep gray gradually dissolving into a ghostly, colloidal translucence as it tapers toward its top. The New Season: De Wain Valentine at Pacific Standard Time in California 2011-09-18T04:00:09Z Governmental agencies are stepping in to debunk bogus coronavirus cures — including chlorine, garlic or colloidal silver — that are ricocheting around the Internet. Perspective | Garlic and bleach won’t cure coronavirus. How such myths originated — and why they’re wrong. 2020-03-09T04:00:00Z This faux-integration is called a colloidal suspension; in layman's terms, the oil, broken into smaller bits via your brute force, is suspended briefly in water. Here's how to emulsify anything 2022-06-23T04:00:00Z How to treat it: As with poison oak rash, use a cold compress, apply calamine lotion or bathe in baking soda or colloidal oatmeal to relive itching symptoms. Itching to hike? Avoid these plants or you'll be scratching for days 2023-05-24T04:00:00Z Forging a colloidal analysis from facts and opinion in the minefield of Middle Eastern diplomacy was a contentious enough undertaking on its own. Milton Viorst, Writer Who Chronicled the Middle East, Dies at 92 2022-12-17T05:00:00Z Silica gel, a colloidal dispersion of hydrated silicon dioxide, is formed when dilute hydrochloric acid is added to a dilute solution of sodium silicate. Chemistry 2019-02-14T00:00:00Z Common fake products caught by the FDA and the Federal Trade Commission over the course of the pandemic, the FDA adds, “include teas, essential oils, tinctures and colloidal silver.” How to spot fake COVID treatments and get real medication instead 2022-07-29T04:00:00Z As a result, blood has a higher colloidal concentration and lower water concentration than tissue fluid. Anatomy and Physiology 2013-06-19T00:00:00Z How to treat it: There isn’t a treatment plan other than steps you can take to relieve the itching, including using a cold compress, applying calamine lotion or bathing in baking soda or colloidal oatmeal. Itching to hike? Avoid these plants or you'll be scratching for days 2023-05-24T04:00:00Z “Patient D sustained a large, deep scalp laceration at home in a farm setting on August 8, 2017,” the order said, “and was treated with colloidal silver and with his parents suturing the wound independently.” Pediatrician’s license suspended in Oregon over vaccines 2020-12-08T05:00:00Z A few solid substances, when brought into contact with water, disperse spontaneously and form colloidal systems. Chemistry 2019-02-14T00:00:00Z Fortuitously, microparticles of the required size will often spontaneously arrange themselves into analogous ordered structures, termed colloidal crystals. Elusive photonic crystals come a step closer 2020-09-22T04:00:00Z This difference in colloidal osmotic pressure accounts for reabsorption. Anatomy and Physiology 2013-06-19T00:00:00Z One article alone, hawking colloidal silver as a treatment for viruses, was viewed an estimated 4.5 million times. Opinion | ‘But I Saw It on Facebook’: Hoaxes Are Making Doctors’ Jobs Harder 2020-08-28T04:00:00Z The New Republic reported that on the day after the World Health Organization designated the coronavirus a pandemic, New York sent a cease-and-desist letter to vendors hawking colloidal silver as a treatment. Why "the market" can’t regulate the trade of PPE and other vital pandemic supplies 2020-07-19T04:00:00Z Some atomizers produce colloidal dispersions of a liquid in air. Chemistry 2019-02-14T00:00:00Z Indeed, opals are naturally formed, fossilized colloidal crystals of silica particles, and the sparkle of opals is caused by the energy gaps described above. Elusive photonic crystals come a step closer 2020-09-22T04:00:00Z The ads, which were new to my timeline, promote everything from cumin seeds to colloidal silver as cancer treatments. Don't post on Facebook unless you are prepared to face the consequences 2020-07-18T04:00:00Z Bayer’s Campho-Phenique Pain & Itch Relief still contains camphor and phenol along with inactive ingredients: colloidal silicon dioxide, eucalyptus oil, glycerin and light mineral oil. Mysterious white spots from Campho-Phenique 2020-07-02T04:00:00Z His product, ‘Silver Solution,’ is described as a colloidal silver, which is a product often sold on the internet as a dietary supplement. TV pastor Jim Bakker hopes attorney general halts probe 2020-06-10T04:00:00Z This breaks one liquid into droplets of colloidal size, which then disperse throughout the other liquid. Chemistry 2019-02-14T00:00:00Z Despite optimism in the 1990s that a simple method would yield diamond-like colloidal crystals, more than two decades and several innovations5 would be required as a prelude to He and colleagues’ achievement. Elusive photonic crystals come a step closer 2020-09-22T04:00:00Z The F.T.C. and the Food and Drug Administration have jointly sent warning letters to companies selling teas, essential oils and colloidal silver — silver particles suspended in liquid — and other substances that supposedly prevent the virus. Bogus Vaccines. Fake Testing Sites. Virus Frauds Are Flourishing. 2020-04-17T04:00:00Z Despite federal health officials’ insistence that colloidal silver cures nothing and can even harm your health, a number of businesses have hawked it as an antidote for COVID-19. Fake cures, scams, phony medications and price gouging: Predators prey during coronavirus 2020-04-13T04:00:00Z Should I be gargling hydrogen peroxide or taking colloidal silver to fight the virus? A virologist answers the coronavirus questions you are too embarrassed to ask 2020-04-08T04:00:00Z All colloidal particles in any one system have charges of the same sign. Chemistry 2019-02-14T00:00:00Z Websites touting miracle cures and preventatives ― herbs, teas, essential oils, tinctures and colloidal silver — are prevalent. Online coronavirus tests — and other iffy products marketed to anxious consumers 2020-04-01T04:00:00Z Websites touting miracle cures and preventives – herbs, teas, essential oils, tinctures and colloidal silver – are prevalent. Covid-19: beware online tests and cures, experts say 2020-03-31T04:00:00Z Bleach, chlorine, garlic or colloidal silver are also sometimes falsely claimed as a cure. Top coronavirus myths, hoaxes and scams 2020-03-20T04:00:00Z The companies’ products include teas, essential oils, and colloidal silver. US authorities battle surge in coronavirus scams, from phishing to fake treatments 2020-03-19T04:00:00Z A gel is a colloidal dispersion of a liquid phase throughout a solid phase. Chemistry 2019-02-14T00:00:00Z The products include teas, essential oils, and colloidal silver. Top coronavirus scams to be aware of 2020-03-12T04:00:00Z The targeted products include teas, essential oils and colloidal silver. FDA and FTC crack down on coronavirus ‘fraudulent prevention and treatment claims’ 2020-03-09T04:00:00Z The FDA has taken action against companies promoting colloidal silver products with misleading claims. NOT REAL NEWS: A look at what didn’t happen this week 2020-02-14T05:00:00Z Nowhere is that clearer than in the claims that Jones and Group make about colloidal silver, which Jones sells as Silver Bullet. Why we are addicted to conspiracy theories 2019-05-02T04:00:00Z Distinguish between dispersion methods and condensation methods for preparing colloidal systems. Chemistry 2019-02-14T00:00:00Z The aspirant with purple-blue skin borne from his constant consumption of colloidal silver, a putative cure for cancer. Essential California: Down and out (and hopeful) in Imperial County 2019-02-05T05:00:00Z Between takes, Adlon took colloidal silver for her own sinus infection. Pamela Adlon, the TV Auteur Hiding in Plain Sight 2019-02-04T05:00:00Z In 2002, The Associated Press reported that the skin of a Libertarian Senate candidate in Montana turned blue-gray after taking too much colloidal silver. NOT REAL NEWS: A look at what didn’t happen this week 2020-02-14T05:00:00Z Group also claims that the FDA “raided” his office to steal his colloidal silver, because it is too powerful. Why we are addicted to conspiracy theories 2019-05-02T04:00:00Z This can make colloidal mixtures appear cloudy or opaque, such as the searchlight beams shown in Figure 11.30. Chemistry 2019-02-14T00:00:00Z His methodology for water purification includes a combination I do not entirely follow of hypochlorine, colloidal silver and charcoal. America's midlife crisis: lessons from a survivalist summit 2017-08-02T04:00:00Z Bacon has a recipe for strawberry milk with drops of colloidal silver in it; Alex Jones pushes tiny bottles of colloidal silver online for $19.95. How Amanda Chantal Bacon Perfected the Celebrity Wellness Business 2017-05-25T04:00:00Z Protectants such as baking soda or colloidal oatmeal ease minor irritation and itching. 4 Ways to Protect Yourself Against Poison Ivy, Oak and Sumac 2016-08-11T04:00:00Z The Mayo Clinic says silver has “no known purpose in the body” and drinking colloidal silver can cause argyria, a condition that can permanently turn skin, eyes and internal organs an ashen bluish color. Why we are addicted to conspiracy theories 2019-05-02T04:00:00Z The particles are already of colloidal size; the water simply disperses them. Chemistry 2019-02-14T00:00:00Z Since it’s America, everybody at the summit is selling something – books, packets of heirloom seeds, colloidal silver. America's midlife crisis: lessons from a survivalist summit 2017-08-02T04:00:00Z Semiconductor devices are constructed solely from a range of colloidal nanocrystals. Exploiting the colloidal nanocrystal library to construct electronic devices | Science 2016-04-07T04:00:00Z The gold is purified down to extracted living minerals that reduce inflammation and brighten the skin without clogging it with colloidal or nano-particles of gold. Skincare lines that promise no toxic chemicals 2015-10-15T04:00:00Z Attorney William Ihlenfeld II says the company and the executives are accused of manufacturing and distributing a drug for skin conditions that contained colloidal silver. W.Va. business, 2 executives face medical product charges 2015-01-07T05:00:00Z Powdered milk particles of colloidal size are produced by dehydrating milk spray. Chemistry 2019-02-14T00:00:00Z Wet compresses, calamine lotion, and colloidal oatmeal baths may help relieve some of the itching, CDC officials said. A roundup of recent Michigan newspaper editorials 2014-11-03T05:00:00Z Semiconductor devices are constructed solely from a range of colloidal nanocrystals. Exploiting the colloidal nanocrystal library to construct electronic devices | Science 2016-04-07T04:00:00Z That last letter pointed to more than 30 violations in which Laibow directly claims that various types of “nano silver” – also known as colloidal silver – is a direct cure for Ebola. 'Fear opens wallets and closes minds': colloidal silver and other Ebola scams 2014-10-24T04:00:00Z As his condition worsened, she turned to homeopathic treatments and other unconventional regimens: raw foods, colloidal silver, an avoidance of refrigeration and air conditioning, a focus on the promotion of regular bowel movements. Off the Grid in a Florida Suburb, Fighting Municipal Code 2014-07-10T04:00:00Z Condensation methods form colloidal particles by aggregation of molecules or ions. Chemistry 2019-02-14T00:00:00Z No longer can neighbourhoods be spuriously created in order to support property prices, for the entire centre of the city has become an undifferentiated and colloidal mass of semi-solidified financial liquidity. London’s high-rise future: thrusting, exhilarating, yet strangely insubstantial 2014-06-09T04:00:00Z We studied rigid, two-dimensional colloidal crystals growing on spherical droplets to understand how the elastic stress induced by Gaussian curvature affects the growth pathway. [Report] Elastic Instability of a Crystal Growing on a Curved Surface 2014-02-06T19:26:28.527Z In a simple fluid, particle diffusion such as the motion of colloidal particles shows a change in the mean squared displacement that is proportional with time. [Report] Effect of Collective Molecular Reorientations on Brownian Motion of Colloids in Nematic Liquid Crystal 2013-12-12T19:26:32.368Z These particles are so small that you can't see them with the naked eye—and when you look at the colloidal solution it appears homogenous, or uniform. Starchy Science: Creating Your Own Colloid 2013-03-07T15:15:00.267Z If the particles grow beyond the colloidal size range, drops or precipitates form, and no colloidal system results. Chemistry 2019-02-14T00:00:00Z Thus, an artificially structured ideal absorber should not be reliant on any sort of patterning methods, and we can make use of colloidal self-assembly processes to very simply produce a randomized patch antenna geometry. Controlled-reflectance surfaces with film-coupled colloidal nanoantennas 2012-12-11T21:22:39.403Z Small pores in the ceramic material filter out most impurities, but a colloidal silver coating also kills microbes. 7 Additional Compelling Breakthroughs 2012-11-14T18:15:01.643Z Multilayer electrodes in colloidal quantum-dot solar cells have been exploited to allow greater freedom in the joint optimization of doping and band offset. Materials interface engineering for solution-processed photovoltaics 2012-08-15T17:22:03.163Z What do you think this tells you about colloidal solutions and their physical properties? Starchy Science: Creating Your Own Colloid 2013-03-07T15:15:00.267Z As a consequence, dirt particles become suspended as colloidal particles and are readily washed away. Chemistry 2019-02-14T00:00:00Z The nanocubes, which were made following a previously published protocol, were immobilized on the polyelectrolyte surface by brief exposure to the colloidal solution followed by rinsing with water and drying under a stream of nitrogen. Controlled-reflectance surfaces with film-coupled colloidal nanoantennas 2012-12-11T21:22:39.403Z Indeed, Dr. Richardson remarks, that in the case of the more complex and differently shielded organs of warm-blooded animals, it is next to impossible to thaw equally and simultaneously all the colloidal fluids. The Contemporary Review, Volume 36, November 1879 2012-04-25T02:01:12.830Z However, completely removing the polymer phase and organic insulating ligands led to marked improvements in transport performance, ensuring the focus was on essentially pure colloidal quantum-dot films. Materials interface engineering for solution-processed photovoltaics 2012-08-15T17:22:03.163Z How do these compare with the colloidal solution made using cornstarch? Starchy Science: Creating Your Own Colloid 2013-03-07T15:15:00.267Z Thus, each individual colloidal particle bears a positive charge, and the colloidal dispersion consists of charged colloidal particles and some free hydroxide ions, which keep the dispersion electrically neutral. Chemistry 2019-02-14T00:00:00Z The density of coverage of nanocubes on the surface of the gold film was controlled by varying the concentration of colloids in solution and the time that the surface was exposed to the colloidal solution. Controlled-reflectance surfaces with film-coupled colloidal nanoantennas 2012-12-11T21:22:39.403Z In the pleasing language of the doctors, "it prevents the pectous change of colloidal matter, and so prevents rigor mortis, coagulation of blood, and solidification of nervous centres and cords." The Contemporary Review, Volume 36, November 1879 2012-04-25T02:01:12.830Z The youngest of the technologies reviewed, colloidal quantum-dot solar cells, raises the possible performance further in view of their intrinsic compatibility with systematically engineered multijunction architectures, and the possible opportunity to exploit multi-exciton generation. Materials interface engineering for solution-processed photovoltaics 2012-08-15T17:22:03.163Z Having the right particle size is essential for making a colloidal solution. Starchy Science: Creating Your Own Colloid 2013-03-07T15:15:00.267Z The charged nature of some colloidal particles may be exploited to remove them from a variety of mixtures. Chemistry 2019-02-14T00:00:00Z By contrast, the bottom-up, colloidal approach described here is simple, rapid, inexpensive and easily scalable, and could lead to the eventual cost-effective manufacture of large-area metasurfaces with controlled reflectance. Controlled-reflectance surfaces with film-coupled colloidal nanoantennas 2012-12-11T21:22:39.403Z The blood and the colloidal fluids remain in the aqueous condition when the body is exposed to cold at freezing-point. The Contemporary Review, Volume 36, November 1879 2012-04-25T02:01:12.830Z The assembly of the QD layer must address a multitude of issues resulting from the synthetic techniques used to produce the colloidal QDs before deposition. [Report] Peak External Photocurrent Quantum Efficiency Exceeding 100% via MEG in a Quantum Dot Solar Cell 2011-12-15T18:55:58.470Z The colloidal solution you made does not behave like a typical solid or a typical liquid. Starchy Science: Creating Your Own Colloid 2013-03-07T15:15:00.267Z He also consulted for the DuPont Company, where he developed the electrostatic precipitator, a device designed to curb air pollution by removing colloidal particles from air. Chemistry 2019-02-14T00:00:00Z He proved that a colloidal substance acts towards a crystalloid much as water does; that the crystalloid rapidly diffuses through the colloid, but that colloids are not themselves capable of diffusing through other colloids. Heroes of Science Chemists 2011-12-09T03:00:21.047Z When freshly prepared it dissolves in cold water to form an indigo-coloured solution with a brownish fluorescence of colloidal aurous oxide; it is insoluble in hot water. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z In this way arsenious acid and similar crystalloids may be separated from the colloidal materials with which, in the case of poisoning, they are usually found mixed in the animal juices or tissues. Scientific Culture, and Other Essays Second Edition; with Additions 2011-09-17T02:00:31.747Z This type of mixture is called a colloidal solution. Starchy Science: Creating Your Own Colloid 2013-03-07T15:15:00.267Z How can it be demonstrated that colloidal particles are electrically charged? Chemistry 2019-02-14T00:00:00Z Let us suppose that this mixture contained sugar and gum; the crystalloidal sugar soon passed through the parchment paper, and was found in the water outside, but the colloidal gum remained in the dialyser. Heroes of Science Chemists 2011-12-09T03:00:21.047Z From the dead substance of the cells the chemist extracts various complex colloidal substances, e.g. proteins, fats, carbohydrates, and various salts, and these in their turn he can resolve into chemical elements. Spiritualism and the New Psychology An Explanation of Spiritualist Phenomena and Beliefs in Terms of Modern Knowledge 2011-08-01T02:00:14.257Z When the nerve particles pass from the colloidal condition into the state of gelation, or become jellied, the nerve experiences a stimulation or becomes active. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z Dial�ysis, the process by means of which a crystalline substance may be separated from a colloidal body. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z Microscopic sections show that flint is very finely crystalline and consists of quartz or chalcedonic silica; colloidal or amorphous silica may also be present but cannot form any considerable part of the rock. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z This method of dialysis was applied by Graham to separate and obtain in the pure state many colloidal modifications of chemical compounds, such as aluminium and tin hydrates, etc. Heroes of Science Chemists 2011-12-09T03:00:21.047Z The vegetable fibre substances are celluloses and derivatives of celluloses, also typically colloidal bodies. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" 2011-03-14T03:01:00.580Z The alcohol counteracts the coagulating tendency and keeps the nerves in a colloidal condition. The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z This may be due to the power of colloidal substances to retain other crystalloidal substances, such as the bases, which, in consequence, cannot be washed out. The Preparation of Plantation Rubber 2011-03-09T03:00:40.870Z It has been suggested that this change is due to the removal of the colloidal silica in solution, leaving behind the fibres and grains of more crystalline structure. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z Matter in the colloidal state appears to be endowed with properties which are quite absent, or are hidden, when it is in the ordinary crystalloidal condition. Heroes of Science Chemists 2011-12-09T03:00:21.047Z The Food and Drug Administration warned consumers against using colloidal silver supplements last year. Weekend Reading: Dietary Supplements 2010-08-06T15:57:00Z For example let us take colloidal substance whose molecular weight is 2000. The Mechanism of Life It would depend on the size of the colloidal particles, and on the frequency of the wave, wouldn't it? The Year When Stardust Fell This is undoubtedly a colloidal suspension of the starch in water. The Chemistry of Plant Life He thus arrived at a division of matter into colloidal and crystalloidal. Heroes of Science Chemists 2011-12-09T03:00:21.047Z Barley water has something of a colloidal action upon the casein, causing the curds to be finer and less tough in character. Dietetics for Nurses We frequently find that two successive cryoscopic observations on the freezing point of the same colloidal solution will vary. The Mechanism of Life It has a very large molecule, and is suspended in our atmosphere in colloidal form. The Year When Stardust Fell The most characteristic property of saponins is that they form colloidal solutions in water which produce a soapy foam when agitated, and are peculiarly toxic, especially to frogs and fishes. The Chemistry of Plant Life Rhea, or ramie, is another leading textile fibre in which the cellulose occurs associated with alkali-soluble colloidal carbohydrates. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Some members of this group swell and become gelatinous in the presence of moisture and heat; some become of a colloidal form in water, and will pass through filter paper; others remain unchanged. Dietetics for Nurses Lea and afterwards Cred� succeeded in obtaining silver in colloidal solution by ordinary chemical means. The Mechanism of Life He's the fellow who got me to wondering about energized metal particles in colloidal suspension. All That Goes Up The colloidal solution of phycoerythrin in water has a brilliant rose-red color, with an orange fluorescence. The Chemistry of Plant Life Further by breaking down, with production of “humus,” a complex of colloidal “unsaturated” bodies of acid function, they fulfil important chemical functions by interaction with the mineral soil constituents. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Like all colloidal substances it is an exceedingly bad conductor of heat. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 4 "Coquelin" to "Costume" Professor Bredig has introduced a more general method of obtaining a number of metals in colloidal solutions in a state of great purity. The Mechanism of Life Many colloidal solutions of copper have been obtained. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" The proteins are all colloidal in character, that is, they form solutions in water, out of which they cannot be dialyzed through parchment, or other similar membranes. The Chemistry of Plant Life It is important to note that a complex having all the chemical characteristics of a ligno-cellulose occurs in a soluble colloidal form in the juice of the white currant. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" From the experiments of G. Bredig it seems that colloidal solutions of a metal act like the metal itself. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Many other chemical and physical agents have a similar inhibitory action on the catalysis of colloidal metals and on diastasic fermentation. The Mechanism of Life With a proper grouping of molecules it might be imagined how "colloidal aggregates appeared," and eventually "organic colloids" which "acquired the property of transforming light energy into chemical activity." God and the World A Survey of Thought There can be no doubt that the all-important rôle of proteins, in either plant or animal tissue, is to furnish the colloidal protoplasmic material in which the vital phenomena take place. The Chemistry of Plant Life Thin, crinkly draperies of heavy silk impregnated with lead in colloidal solution, covered all the walls, the door itself. Slaves of Mercury Schneider and others, have proved the existence of “colloidal silver”; similar forms of the metals gold, copper, and of the platinum metals have been described. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" There are moreover many properties common to colloidal solutions and suspensions of fine powders, such as kaolin, mastic, charcoal, or Indian ink. The Mechanism of Life From colloidal slime to man is a long road, the conception of which taxes our imaginations to the utmost, but it is an ascent which is now fairly well demonstrated. Introduction to the Science of Sociology There are, of course, occasional examples of reactions between dry solids, such as the explosion of gunpowder, etc., but the general rule is that reacting materials must be in either colloidal or true solutions. The Chemistry of Plant Life Among the newer forms of treatment are diluted Lugol's solution injected into the trachea, anti-streptococcus serum and colloidal silver solution injected into the circulation. Special Report on Diseases of the Horse To put the matter generally, in these colloidal and complex carbohydrates the ordinary physical criteria of molecular weight are wanting. Researches on Cellulose 1895-1900 Suppose, for instance, that the molecules of a colloidal solution are aggregated into groups of ten. The Mechanism of Life In the case of soda soaps the colloidal character increases with the molecular weight of the fatty acids. The Handbook of Soap Manufacture Generally speaking, most enzymes are colloidal in form and, hence, do not diffuse through membranes such as the cell-walls. The Chemistry of Plant Life Schwann tries to explain the origin of the "metabolic" action, the analogy of which with the contact-action of colloidal platinum he recognises, by attributing it to the peculiar structural arrangements of molecules. Form and Function A Contribution to the History of Animal Morphology A large amount of experimental matter has been accumulated in view of the ultimate contribution of the results to the general theory of colloidal solutions. Researches on Cellulose 1895-1900 The curve of decomposition of hydrogen peroxide by colloidal platinum may be compared with the curve of fermentation by emulsin. The Mechanism of Life An example of such is found in the proteids of the blood which, as a colloidal solution, pass through the capillary walls to become a part of the lymph. Physiology and Hygiene for Secondary Schools The first is that this union is in the form of an actual molecular combination, or chemical compound, and the other is that it is a purely physical, or colloidal complex. The Chemistry of Plant Life Professor Moore says this biotic energy "arises in colloidal structures," and so far as biochemistry can make out, arises spontaneously and gives rise to that marvelous bit of mechanism, the cell. The Breath of Life The action of the acid though selective is, of course, not exclusively confined to these colloidal carbohydrates. Researches on Cellulose 1895-1900 We may obtain colloidal precipitates exactly analogous to coagulated albumin by mixing a weak solution of chloride of calcium with potassium carbonate or tribasic phosphate. The Mechanism of Life Since, however, it has the appearance, on being mixed with water, of being dissolved, it is called a colloidal solution. Physiology and Hygiene for Secondary Schools This view also makes the remarkable catalytic effects which take place in living protoplasm, which undoubtedly exists in the colloidal condition, much more easily understood. The Chemistry of Plant Life "A mass of colloidal slime" that has the power of assimilation and of growth and reproduction, is certainly a new thing in the world, and no chemical analysis of it can clear up the mystery. The Breath of Life The paper-making quality of the fibrous raw materials is also discussed, not merely from the point of view of the form and dimensions of the ultimate fibres, but their capacity for 'colloidal hydration.' Researches on Cellulose 1895-1900 Like albumin this precipitate forms flakes, and is deposited slowly as a gelatinous colloidal mass. The Mechanism of Life By the second, colloidal tungsten was produced by operating an arc between tungsten electrodes under water. Artificial Light Its Influence upon Civilization This is probably due, in most cases at least, to the action of the electrolyte upon the colloidal condition of the enzyme. The Chemistry of Plant Life It is easy enough to produce colloidal slime, but to endow it with these wonderful powers so that "the promise and the potency of all terrestrial life" slumbers in it is a staggering proposition. The Breath of Life Cellulose is distinguished by its inherent constructive functions, and these functions take effect in the plastic or colloidal condition of the substance. Researches on Cellulose 1895-1900 Coagulation therefore would seem to be merely the colloidal precipitation of a salt of calcium. The Mechanism of Life In the second group the coloring substances are present in a finely divided or colloidal state; that is, the coloring is due to the presence of particles in mechanical suspension. Artificial Light Its Influence upon Civilization If yeast juice be filtered through a gelatin filter, the colloidal enzymes which are left behind are entirely inactive in producing fermentation, but may be restored to activity again by mixing with the filtrate. The Chemistry of Plant Life When we say growth, metabolism, osmosis, the colloidal state, science points out that all this may be affirmed of inorganic bodies. The Breath of Life These facts point to the conclusion that crystallizable paraffine exists ready formed in both petroleum and in ozokerite, but in both cases other colloidal substances prevent its crystallization. Scientific American Supplement, No. 711, August 17, 1889 It may therefore be of interest to investigate some of the numberless forms of crystallization in colloidal solutions. The Mechanism of Life The gold is left in a colloidal state. Artificial Light Its Influence upon Civilization Reference has frequently been made, in preceding chapters, to the fact that proteins, enzymes, lipoids, etc., exist in the protoplasm of plants and animals in the colloidal condition. The Chemistry of Plant Life The contents consist of a semi-fluid colloidal substance, lying in contact with the inner surface of the membrane, and, like it, closed on all sides. Scientific American Supplement, No. 623, December 10, 1887 The assumption is based on the existence of a penta-nitrate and the insoluble and colloidal nature of cellulose. Nitro-Explosives: A Practical Treatise All vital phenomena result from the contact of two colloidal solutions, or of two liquids separated by an osmotic membrane. The Mechanism of Life It was also thought that gun-cotton of a high degree of nitration when made into colloidal form would even then burn too quickly to be suitable for use in firearms. Scientific American Supplement, No. 821, September 26, 1891 He further discovered that the same individual chemical element or compound may exist sometimes in crystalloidal, and sometimes in colloidal, form. The Chemistry of Plant Life It cannot be too emphatically stated that where "biotic" force is manifested, these colloidal or albuminous compounds are found. Scientific American Supplement, No. 623, December 10, 1887 The sheets, when thoroughly dried, are of a uniform yellowish-grey colour, and of the characteristic colloidal consistency; they possess a perfectly smooth surface, and are free from internal blisters or cracks. Nitro-Explosives: A Practical Treatise For this purpose we add to the solution traces of some colloidal substance, such as gelatine or gum, so as to delay the crystallization. The Mechanism of Life A further action upon the blood, instituted by alcohol in excess, is upon the fibrine or the plastic colloidal matter. Grappling with the Monster The Curse and the Cure of Strong Drink That is, the state of a substance may be either gaseous, liquid, or solid; and its condition when in solution may be either crystalloidal or colloidal. The Chemistry of Plant Life Substances of this class also exhibit a tendency to form, with pure water, what are known as colloidal solutions. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes SEE Lectures on biologic aspects of colloidal and physiologic chemistry, 1925-1926. U.S. Copyright Renewals, 1955 July - December Biology is thus but a branch of the physico-chemistry of liquids; it includes the study of electrolytic and colloidal solutions, and of the molecular forces brought into play by solution, osmosis, diffusion, cohesion, and crystallization. The Mechanism of Life The eyeball is a structure of colloidal humors and membranes, and of nothing else. Grappling with the Monster The Curse and the Cure of Strong Drink Hence, the expression "enzymes are colloids," means only that enzymes exist in the colloidal condition, and not that enzymes represent a definite type of substances having the group name "colloids." The Chemistry of Plant Life Tabasheer would seem, from Brewster's experiments, to be a very intimate admixture of two and a half parts of air with one part of colloidal silica. Scientific American Supplement, No. 595, May 28, 1887 Did you ever realize that practically all industrial chemistry is colloidal in its nature? Edison, His Life and Inventions The cathode is thus pulverized into a very fine powder which rests in suspension in the liquid, constituting a colloidal solution. The Mechanism of Life It receives colloidal food for its muscles: combustible food for its motion; water for the solution of its various parts; salt for constructive and other physical purposes. Grappling with the Monster The Curse and the Cure of Strong Drink These properties bring into play, in a substance which is in the colloidal condition, in a remarkable degree, all the phenomena which are associated with surface boundaries between solids and liquids, liquids and gases, etc. The Chemistry of Plant Life This classification is with certain modifications as follows:- I. Albumins proper: characterized by having colloidal solutions. The Project Gutenberg Encyclopedia Volume 1 of 28 The one represents mere crystallizable matter, the other the more complex colloidal or albuminoid substance, or that capable of producing a much greater number of aggregates. Life: Its True Genesis Colloids diffused in water are usually called colloidal solutions, but they are not true solutions. The Mechanism of Life If these membranes are rendered too porous, and let out the colloidal fluids of the blood—the albumen, for example—the body so circumstanced, dies; dies as if it were slowly bled to death. Grappling with the Monster The Curse and the Cure of Strong Drink The properties arising out of the colloidal condition are of such tremendous importance in connection with the vital phenomena exhibited by cell protoplasm that it is necessary to give some detailed consideration to them here. The Chemistry of Plant Life Unlike the "B" it is apparently not adsorbed by fine precipitates such as fullers' earth or colloidal iron. The Vitamine Manual When sulphonating and especially when condensing substances, black dyestuffs or very finely divided carbon in the colloidal state are often formed. Synthetic Tannins This mobility in the constitution of the micell� appears to be one of the principal causes of the peculiar properties of colloidal solutions. The Mechanism of Life When the first clever bit of colloidal ooze, protoplasm as the ameba, protruded a bit of itself as a pseudopod, it achieved a new freedom. The Glands Regulating Personality In all cases of colloidal swelling, the swollen body possesses much less cohesion, and greater ductility, than it had before swelling. The Chemistry of Plant Life Of course that does not apply to the colloidal substances in the blood which would not pass by osmosis under any circumstances. The War Terror A similar effect, though of opposite nature from a tanning standpoint, is exhibited by sulphonates on certain colloidal dark coloured substances. Synthetic Tannins Caustic soda and other chemical substances inhibit the catalytic action of colloidal platinum in the same way as they inhibit the fermenting action of diastase. The Mechanism of Life As2O3, in cases of suspected poisoning, was formerly separated from the stomach in this way, as it is a crystalloid, whereas most of the other contents of the stomach are colloidal. An Introduction to Chemical Science This effect is easily apparent if one thinks of the enormous surface which is exposed when a tiny portion of colloidal soap is blown out into a "soap-bubble" several inches in diameter. The Chemistry of Plant Life Probably not, for most of the body fluids are of that colloidal nature in which coagulation occurs in the presence of small quantities of special agents. The Riddle of the Rhine; chemical strategy in peace and war These properties clearly show how dependent is the colloidal state on small differences in the structure of two substances. Synthetic Tannins Our experiments show how readily such striped or ruled structures may be produced in a colloidal solution by the simple diffusion of salts such as are found in every living organism. The Mechanism of Life As we have stated, the active constituent of the thyroid is iodin in a special protein combination which is stored in the colloidal spaces. Origin and Nature of Emotions But the colloidal condition of the catalyst may also aid in decreasing the "chemical resistance" which tends to slow up the reaction. The Chemistry of Plant Life This is probably the reason why the coagulum of a colloidal liquid usually presents a vacuolar or spongy structure. The Mechanism of Life The regulation of the passage of materials into and out of the cell is governed by minute changes in the electrolyte concentration, etc., which produce enormous changes in the colloidal character of the protoplasm. The Chemistry of Plant Life It consists of a vessel of porous porcelain, the pores of which are filled with a colloidal solution of ferrocyanide of copper. The Mechanism of Life It is apparent, therefore, that the study of the colloidal condition of matter and of the properties arising out of it is of immense importance to the biochemist. The Chemistry of Plant Life Large numbers of industrial processes are based upon colloidal phenomena. The Chemistry of Plant Life Structure, or organization of the cell-contents into separate colloidal compartments, and the segregation of cell-contents into masses having different functions, is essential to any reasonable conception of how the cell performs its various activities. The Chemistry of Plant Life The best understanding of the structural arrangement is afforded by the conception that protoplasm consists of a colloidal gel, or sometimes a very viscid sol, containing water, salts, carbohydrates, fats, proteins, and enzymes. The Chemistry of Plant Life He found that 1 atom-gramme of colloidal platinum gives a sensible catalytic effect when diluted with 70 million litres of water. The Mechanism of Life With this conception in mind, we may now proceed to a consideration of how the various components of the complex organic colloidal system, and their specific properties, can affect its chemical activities. The Chemistry of Plant Life Many volumes of treatises concerning the industrial applications of colloidal phenomena have been written. The Chemistry of Plant Life The fact that protoplasmic material can exist in turgid form with such high percentages of water as these is due, as has been pointed out, to its existence as a colloidal gel. The Chemistry of Plant Life No other condition than that of a colloidal gel could respond in this way to changes in water content. The Chemistry of Plant Life Thus a mere trace of sulphuretted hydrogen or hydrocyanic acid will paralyse the action of a colloidal metal, just as it does that of a ferment. The Mechanism of Life Hence, the presence of large proportions of water in the colloidal complex known as protoplasm has a very important influence upon its possibilities of biological reactions. The Chemistry of Plant Life This list could be extended to a great length, but is already long enough to emphasize the very great importance and practical value of colloidal phenomena in daily life. The Chemistry of Plant Life In the case of a cell, the membrane in question may be either the cell-wall or the internal colloidal films which are distributed throughout the entire mass of the cell contents. The Chemistry of Plant Life Even colloidal materials will diffuse through most common membranes, although at so slow a rate that the process is scarcely observable by ordinary methods of study. The Chemistry of Plant Life They are, in fact, periodic precipitates of phosphate and carbonate of lime deposited in the colloidal organic substance of the mollusc. The Mechanism of Life In colloidal gels, this effect is so pronounced, in many cases, as to completely overshadow other types of influences upon reaction velocities. The Chemistry of Plant Life Many of the phenomena of nature are colloidal in character. The Chemistry of Plant Life Further, as has been pointed out, colloidal phenomena are essentially due, in large part at least, to the electric charges on the dispersed particles. The Chemistry of Plant Life Here, we deal with adsorption and other colloidal phenomena, rather than with ordinary stoichiometric combinations. The Chemistry of Plant Life Substances in a colloidal state have a great tendency to form these chemical or physical membranes at the point of contact between the colloidal solute and the solvent. The Mechanism of Life Again, colloidal adsorption effects often lead to the so-called "capillary segregation" of added staining materials. The Chemistry of Plant Life In both plants and animals, as will be pointed out in the following chapter, practically all the vital activities of the cell protoplasm are definite manifestations of colloidal phenomena. The Chemistry of Plant Life A third effect of increasing acidity is that it induces increased imbibition of water by the colloidal gel and causes swelling of the tissue. The Chemistry of Plant Life Finally, comparatively slight variations in the reaction of the protoplasm produce enormous changes in its colloidal condition, affecting in a very marked degree its permeability, its power of adsorption, etc. The Chemistry of Plant Life When a solute is introduced into a colloidal solution, the greater the concentration of the colloid the slower will be the diffusion. The Mechanism of Life It is clear, therefore, that variations in the chemical reaction of protoplasm profoundly affect its colloidal condition, its enzymic activity, and its respiratory processes. The Chemistry of Plant Life Enzymes perform their catalytic functions by reason of their colloidal form. The Chemistry of Plant Life Similarly, formaldehyde and many other organic compounds may affect the colloidal properties of the protoplasmic gel in such a way as to injure the plant tissues. The Chemistry of Plant Life It probably affects the colloidal condition in some way similar to its hardening effect upon gelatin, etc. The Chemistry of Plant Life I was able to assure him by return of post that the figure was the result of the crystallization of copper sulphate in a colloidal medium. The Mechanism of Life A study of the phenomena resulting from the colloidal condition of matter is throwing a flood of light upon the mechanism by which protoplasm accomplishes its control of vital activities. The Chemistry of Plant Life Proteins exist in colloidal form and are the seat of all vital functions. The Chemistry of Plant Life |
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