| 单词 | barium |
| 例句 | A poor pharmacist with little in the way of advanced apparatus, he discovered eight elements–chlorine, fluorine, manganese, barium, molybdenum, tungsten, nitrogen, and oxygen–and got credit for none of them. A Short History of Nearly Everything 2003-05-06T00:00:00Z She reminded him that parts of the city had been built on landfills containing arsenic, lead, mercury, barium, and other carcinogens. Zeitoun 2009-07-15T00:00:00Z She was given an endoscopy, an MRI, and a barium swallow to test her gastrointestinal tract. Zeitoun 2009-07-15T00:00:00Z The chemistry was clear if puzzling: Bombarding uranium with neutrons produced barium, element 56, about half as heavy as uranium, element 92. Letters to the Editor 2018-03-02T05:00:00Z The masks release chemicals like barium peroxide, sodium chlorate, and potassium chlorate. 6 common misconceptions about flying 2021-08-09T04:00:00Z He grew up in Bulgaria as it was manhandled first by the fascists and then the communists, who converted young Ulrich’s passion for chemistry into a sentence at a barium chloride factory. Newly Released Books 2011-02-16T22:45:21Z According to the researchers the Altar Stone contains a lot of barium - a kind of metal. Stonehenge's Altar Stone is not Welsh, Aberystwyth University says 2023-10-17T04:00:00Z Researchers found sodium, potassium, lithium, nickel, manganese, chromium, magnesium, vanadium, barium, calcium, and iron. Stranger Things in a Stranger World 2023-06-26T04:00:00Z A sample collected by Contra Costa Health Services last year showed levels of aluminum, barium, chromium, nickel, vanadium, and zinc higher than normal background levels for those metals. FBI, EPA canvass California residents over refinery emissions- report 2023-05-27T04:00:00Z Tests determined that the residue contained metals such as aluminum, barium, chromium, nickel, vanadium and zinc. FBI investigating hazardous fallout from Bay Area refinery 2023-05-26T04:00:00Z Preliminary sampling revealed the spent catalyst contained aluminum, barium, chromium, nickel, vanadium and zinc. Officials release map of hazardous fallout from refinery mishap 2023-04-11T04:00:00Z Test samples of the residue revealed such metals as aluminum, barium, chromium, nickel, vanadium and zinc. A Bay Area city reels from refinery's hazardous fallout. Did warnings come too late? 2023-04-02T04:00:00Z A quantum leap forward came in early 1986, when they created lanthanum barium copper oxide, a ceramic that became superconductive at about minus 400 degrees Fahrenheit. K. Alex Müller, Innovator in Ceramic Superconductors, Dies at 95 2023-01-18T05:00:00Z The initial screening will probably involve a barium swallow test that helps your physician see how your esophagus looks on an X-ray, as well as how large a hernia is. Is a hiatal hernia causing your GI symptoms? What to look for. 2022-10-30T04:00:00Z A thin slab of barium borate first split a single photon into two of photons lower energy with correlated angular momenta. Researchers Use Quantum ‘Telepathy’ to Win an ‘Impossible’ Game 2022-10-25T04:00:00Z They can contain radioactive uranium, thorium and radium along with toxic metals such as barium, cadmium and lead, according to the environmental group ManaSota 88. Pollution from Florida mining a concern with Hurricane Ian 2022-09-27T04:00:00Z Greater contrast can be achieved by injecting a substance with a large atomic number, such as barium or iodine. College Physics for AP Courses 2015-08-12T00:00:00Z Among the products of Meitner, Hahn, and Strassman’s fission reaction were barium, krypton, lanthanum, and cerium, all of which have nuclei that are more stable than uranium-235. Chemistry 2019-02-14T00:00:00Z Initially, believers claimed sprays containing a toxic metal, barium, were being used to either pacify or reduce populations. Chemtrails: What's the truth behind the conspiracy theory? 2022-07-22T04:00:00Z What they do display are strange increases in barium—likely from barite, a mineral used in offshore oil drilling. Bogs, lakebeds, and sea floors compete to become Anthropocene’s ‘golden spike’ 2022-05-05T04:00:00Z The paint is based on two key features: the concentration and size of the barium sulfate compound. Purdue researchers create the world’s whitest white paint 2022-01-02T05:00:00Z Residents not only inhaled air pollutants but were also exposed to toxic chemicals, metals such as barium, and oil residue that settled inside their homes, as shown by dust sampling. Utilities commission approves gas storage plan at Aliso Canyon over residents' objections 2021-11-05T04:00:00Z Write the formulas of barium nitrate and potassium chlorate. Chemistry 2019-02-14T00:00:00Z Residents not only inhaled air pollutants but were also exposed to toxic chemicals, metals such as barium and oil residue that settled inside their homes and were detected in dust sampling. Long after Aliso Canyon gas rupture, residents still fear long-term toll on their health 2021-10-03T04:00:00Z Their sample, made from barium, lead, bismuth and oxygen, was fully three-dimensional. Electrons Can Form Bizarre 2-D ‘Flatland’ in Superconductor 2021-07-06T04:00:00Z It also has particles of the barium sulfate that are of all different sizes in the paint. Purdue researchers create the world’s whitest white paint 2022-01-02T05:00:00Z His case hinged on evidence that his hands tested positive for gunshot residue — microscopic particles of lead, barium and other metals discharged during gunfire. With 12 men exonerated, the force behind Maryland’s Innocence Project hangs it up 2021-06-03T04:00:00Z The decomposition of solid barium nitrate leads to the formation of solid barium oxide, diatomic nitrogen gas, and diatomic oxygen gas. Chemistry 2019-02-14T00:00:00Z The researchers ultimately selected a relatively inexpensive compound called barium sulfate. ‘Whitest White’ Paint Beats the Heat 2021-05-21T04:00:00Z The barium sulfate particles are different sizes, allowing the paint to scatter a broader range of light than if they were all the same size. Please keep Anish Kapoor away from the whitest white paint 2021-04-15T04:00:00Z The amount of light each barium sulfate particle scatters depends on its size, Peoples said. Purdue researchers create the world’s whitest white paint 2022-01-02T05:00:00Z Harmful chemicals such as barium, chromium, copper, lead and zinc all seem posed to contaminate Oregon's ecosystem. Police deployed potentially lethal chemical during Black Lives Matter protests 2021-02-21T05:00:00Z Calcium and strontium produce shades of red, whereas barium produces a green color. Chemistry 2019-02-14T00:00:00Z The city report said high levels of cyanide, hexavalent chromium and barium in sediment in catch basins near the courthouse indicate there may be an accumulation from chemical munitions. Environmental groups sue over Portland tear gas use 2020-10-20T04:00:00Z For instance, fluids used in drilling are weighted with barium sulfite to prevent gas from traveling up the well, and there are alarms to alert workers to gas. AP Was There: Deepwater Horizon oil platform explosion 2020-04-20T04:00:00Z A sounding rocket will fly into the ionosphere—an atmospheric layer hundreds of kilometers up that’s awash in ions and electrons—and eject 1.5 kilograms of barium atoms. U.S. tests ways to sweep space clean of radiation after nuclear attack 2019-12-26T05:00:00Z The results showed the woman, who wished to remain anonymous, had "significantly higher" traces of "heavy metals" known as barium and bismuth than what's considered normal. Sex cult convict Keith Raniere's former neighbors 'terrified' after documentary claims he poisoned women in NY home 2019-12-11T05:00:00Z At room temperature, barium shows the most vigorous reaction. Chemistry 2019-02-14T00:00:00Z Tests showed “unusually elevated levels of bismuth and barium.” Former NXIVM follower claims convicted sex cult leader Keith Raniere is linked to pal’s disappearance in doc 2019-12-09T05:00:00Z But a scatter diagram presented in the lawsuit shows its ratios of barium to nickel and strontium to zinc fall far outside the norms for Kona. The Kona coffee you buy from Costco and Walmart? It might be fake 2019-09-15T04:00:00Z Ionized by sunlight, the barium would create a ring of moving plasma that emits radio waves: essentially a space version of a magnetron, the gadget used in microwave ovens. U.S. tests ways to sweep space clean of radiation after nuclear attack 2019-12-26T05:00:00Z The detected isotopes of barium, strontium and lanthanum would be created in the core of a nuclear reactor, which produces energy by splitting uranium atoms in a chain reaction. How nuclear scientists are decoding Russia’s mystery explosion 2019-08-29T04:00:00Z Sodium peroxide and the peroxides of calcium, strontium, and barium form by heating the corresponding metal or metal oxide in pure oxygen: Chemistry 2019-02-14T00:00:00Z When lanthanum in La2CuO4 is partially replaced with barium, electron vacancies called holes are introduced into the system in a process known as doping. Superconductivity seen in a non-magnetic nickel oxide 2019-08-27T04:00:00Z Russia’s state weather and environmental monitoring agency said Monday the brief rise in radiation levels was caused by a cloud of radioactive gases containing isotopes of barium, strontium and lanthanum that drifted across the area. Russian agency reveals details of radiation after explosion 2019-08-26T04:00:00Z Russia’s state weather and environmental monitoring agency said Monday the brief rise in radiation levels was caused by a cloud of radioactive gases containing isotopes of barium, strontium and lanthanum that drifted across the area. Russian agency reveals details of radiation after explosion 2019-08-26T04:00:00Z Various forms of barium are used as a stabilizing additive to fracking fluids, and companies including the oil field services firm Halliburton testified that using alternative products would decrease drilling productivity. Trump’s tariff exemptions pick winners and losers 2019-08-24T04:00:00Z Most sulfates are soluble in water; however, the sulfates of barium, strontium, calcium, and lead are only slightly soluble in water. Chemistry 2019-02-14T00:00:00Z In between, he places a layer of barium nitride and other barium compounds, which dissolve along with the boron nitride and act as a solvent and catalyst to aid the crystal’s growth and absorb impurities. Meet the crystal growers who sparked a revolution in graphene electronics 2019-08-20T04:00:00Z Apart from the arsenic, it found barium and lead levels above legal limits. Proposed site for David Beckham's MLS stadium reportedly twice legal limit 2019-08-20T04:00:00Z To create their qutrits, both teams used the triple-branching path of a photon, expressed in carefully orchestrated optical systems of lasers, beam splitters and barium borate crystals. "Qutrit" Experiments Are a First in Quantum Teleportation 2019-08-06T04:00:00Z Then, in 1938, Meitner and Hahn realized that one of the elements Fermi had made was barium, and that the uranium nucleus had indeed split. Celebrate the women behind the periodic table 2019-01-27T05:00:00Z A suspension of barium sulfate, a chalky powder, is ingested by the patient. Chemistry 2019-02-14T00:00:00Z Taniguchi is cagey about the exact recipe: this is his secret sauce, and he likes to change the composition of the barium layer from batch to batch. Meet the crystal growers who sparked a revolution in graphene electronics 2019-08-20T04:00:00Z One problem with cuprates, such as yttrium barium copper oxide, is that they are a jumble of elements that proves difficult to model. How ‘magic angle’ graphene is stirring up physics 2019-01-01T05:00:00Z Her international colleagues also measured oxygen isotopes, barium, and lead in the teeth. Neanderthal children shivered and suffered in ancient Europe 2018-10-31T04:00:00Z For example, radium behaves a lot like barium and has a heavier atomic weight, so it fits just below barium in the periodic table. Celebrate the women behind the periodic table 2019-01-27T05:00:00Z Since the Ksp of barium sulfate is 2.3 10–8, very little of it dissolves as it coats the lining of the patient’s intestinal tract. Chemistry 2019-02-14T00:00:00Z One scientist noted that in one remote location, the levels of barium in the atmosphere were unusually high relative to the levels of barium in the soil. What Are Chemtrails Made Of? 2018-09-22T04:00:00Z The agency says the metals used - barium, lithium and aluminum compounds - are also used in fireworks. NOT REAL NEWS: A look at what didn’t happen this week 2018-03-23T04:00:00Z By timing the surges of barium, a marker of milk consumption in the teeth, they found that both Neanderthals nursed for 2.5 years before they were weaned. Neanderthal children shivered and suffered in ancient Europe 2018-10-31T04:00:00Z A private laboratory took 20 samples from various ash roads and found barium, chromium within federal limits. Georgia county: Coal ash roads within contamination limits 2018-02-07T05:00:00Z The carbonate ion concentration is gradually increased in a solution containing equal concentrations of the divalent cations of magnesium, calcium, strontium, barium, and manganese. Chemistry 2019-02-14T00:00:00Z "I was toxic in aluminium, barium, strontium, arsenic, manganese. And I live very healthily." The people who think governments control the weather 2018-01-30T05:00:00Z They discovered high concentrations of hazardous elements including antimony, barium, bromine, cadmium, chromium, lead and selenium. Second-hand toys 'could harm children' 2018-01-26T05:00:00Z Barry is about as funny as a barium milkshake from Chernobyl. Opinion | Dave Barry’s laughless review of 2017 2018-01-12T05:00:00Z Tests of surface water in the area found the heavy metal barium in every sample. Harvey shines a spotlight on a high-risk area of chemical plants in Texas 2017-09-01T04:00:00Z Colorful fireworks often involve the decomposition of barium nitrate and potassium chlorate and the reaction of the metals magnesium, aluminum, and iron with oxygen. Chemistry 2019-02-14T00:00:00Z The one scientist who dissented recorded unusually high levels of atmospheric barium in a remote area with low levels of barium in the soil. The people who think governments control the weather 2018-01-30T05:00:00Z They showed the elements barium, zinc and gallium. TV's Big Bang Theory Inspires Real New Chemical: BaZnGa! 2017-07-25T04:00:00Z Copper compounds, for example, throw off blue light, strontium produces red fireworks, sodium makes yellow, and barium glows green. How Hollywood and the Army are shaping the future of fireworks 2017-07-04T04:00:00Z Arsenic, barium, chromium, lead and mercury were found in water two blocks from a public park. Harvey shines a spotlight on a high-risk area of chemical plants in Texas 2017-09-01T04:00:00Z One such technique utilizes the ingestion of a barium compound before taking an X-ray image. Chemistry 2019-02-14T00:00:00Z The vapor tracers that are released are made of barium, lithium, and trimethylaluminum, the same ingredients you might find in fireworks. A small NASA rocket created a burst of colorful clouds in the night sky 2017-06-29T04:00:00Z ‘I think research is always the entertaining part, so the one important thing is that we found a new crystal structure of barium, zinc and gallium,’ says Na, and Canfield agrees. TV's Big Bang Theory Inspires Real New Chemical: BaZnGa! 2017-07-25T04:00:00Z The luminescent colors are due to sunlight interacting with the chemicals barium, strontium and cupric-oxide, the U.S. NASA experiment to color the skies over the U.S. East Coast 2017-06-11T04:00:00Z She hasn’t, because “testing objects is expensive”, but she’s done seven water tests on her ponds, and says they turned up abnormal levels of aluminum, barium and strontium. My month with California’s conspiracy theorist farmers 2017-05-22T04:00:00Z The only definitely known halous acid is chlorous acid, HClO2, obtained by the reaction of barium chlorite with dilute sulfuric acid: Chemistry 2019-02-14T00:00:00Z Along with calcium, an element called barium transfers from mom to baby through milk and ends up in the bones and teeth of her offspring. Orangutans can nurse up to 9 years. Watch how scientists figured that out 2017-05-17T04:00:00Z After three laborious years, my team laser-cooled a small cloud of barium ions in a Paul trap. Hans Dehmelt (1922-2017) : Nature : Nature Research 2017-05-16T04:00:00Z A small rocket carrying 10 canisters of barium and other chemicals is due to lift off from Wallops Island, Virginia between 9:04 and 9:19 p.m. NASA experiment to color the skies over the U.S. East Coast 2017-06-11T04:00:00Z But to Tammi, a 54 year-old organic farmer, it’s a “chemtrail”: a toxic cocktail of aluminum, strontium and barium sprayed from planes in a plot to control the weather, the population and our food supply. My month with California’s conspiracy theorist farmers 2017-05-22T04:00:00Z It is possible to obtain the lighter halic acids from their barium salts by reaction with dilute sulfuric acid. Chemistry 2019-02-14T00:00:00Z But barium maps didn’t show offspring suckling consistently throughout that time. Orangutans can nurse up to 9 years. Watch how scientists figured that out 2017-05-17T04:00:00Z Shortly after, my lab took the first snapshot of an atom — an individual barium ion — in the light of its resonance fluorescence. Hans Dehmelt (1922-2017) : Nature : Nature Research 2017-05-16T04:00:00Z The company has halted shipments of barium sulfate waste since the more recent spill in March, 2016. Canadian uranium company: No need for fine for sludge spills 2017-05-04T04:00:00Z The theory has been popularized on websites that display photographs of contrails but are described instead as chemtrails that persist in the atmosphere and contain harmful chemicals like strontium, barium and aluminum. Scientists Just Say No to ‘Chemtrails’ Conspiracy Theory 2016-08-15T04:00:00Z The NRC said Wednesday the barium sulfate sludge originated at Cameco’s Smith Ranch-Highland uranium mine in east-central Wyoming and contained low levels of radioactive material. NRC: Uranium miner agrees to fix radioactive sludge leaks 2016-08-31T04:00:00Z The last plant was shut down in 1990, by which time DePue and its once pristine lake were awash in arsenic, lead, mercury, barium, copper, cadmium, zinc, and a host of other heavy-metal contaminants. America’s Dirtiest Boat Races 2016-07-29T04:00:00Z We came up with a proposal for trapping and cooling a barium ion, rather than a subatomic particle. Hans Dehmelt (1922-2017) : Nature : Nature Research 2017-05-16T04:00:00Z The measures will include putting the barium sulfate waste into bags inside a shipment container that has a wide lip at the top to prevent any loose material from sloshing over the edge. Canadian uranium company: No need for fine for sludge spills 2017-05-04T04:00:00Z One scientist, who was not identified, said he or she had come across evidence of high levels of barium in the atmosphere in a remote area where soil levels of barium were low. Scientists Just Say No to ‘Chemtrails’ Conspiracy Theory 2016-08-15T04:00:00Z For instance, barium compounds emit green, red comes from strontium, and blues are made with copper. Quiet fireworks: Less bang can be more colorful 2016-07-02T04:00:00Z For instance, barium compounds emit green, red comes from strontium and blues are made with copper. Oh, Say, Can You See (but Not Hear) Those Fireworks? 2016-06-30T04:00:00Z The Los Angeles County Department of Public Health released results Friday, May 13, 2016, that showed barium, manganese and vanadium were found more frequently and in higher concentrations in homes in the Porter Ranch area. Public health officials say homes near the nation's largest-known methane leak had higher levels of toxic metals that could be responsible for persistent symptoms residents have endured 2016-05-14T04:00:00Z Downstream, there were detectable levels of chemicals that commonly lace fracking waste — barium, bromide, calcium, chloride, sodium, lithium, strontium. This mystery was solved: Scientists say chemicals from fracking wastewater can taint fresh water nearby 2016-05-11T04:00:00Z She and other pathologists routinely study X-ray videos of patients who eat or drink solutions coated with barium, to follow the trail of food through, ideally, the esophagus. Therapists, researchers in Lincoln make swallowing easier 2016-04-17T04:00:00Z Fireworks cause "a dizzying rise in micro particles of substances harmful to health, such as strontium, barium, copper, aluminum, titanium and iron," Mayor Giuseppe Falcomata said. New Year fireworks fall victim to Italy's smog crisis 2015-12-30T05:00:00Z Cotter Corp. quietly buried 8,700 tons of what government investigators later identified as leached barium sulfate residue at the West Lake Landfill in 1973. When the landfill fire is burning near the radioactive waste dump 2015-10-20T04:00:00Z The agency uses luminescent chemicals like barium to better visualize and track clouds of these particles as they get moved around in the ionosphere by the Earth's magnetic field. NASA is putting on a colorful light show in the sky tonight 2015-10-07T04:00:00Z A thin shell made up of a high-temperature superconducting material called yttrium barium copper oxide lined the inner cylinder, bending the magnetic field that traveled through the interior. Magnetic Wormhole Created in Lab 2015-08-21T04:00:00Z For red, you want a strontium compound, and for green, you need a barium compound. The chemistry behind a firework explosion 2015-07-03T04:00:00Z This means either a colonoscopy every 10 years or one of several other options every five years: flexible sigmoidoscopy, virtual colonoscopy, or double-contrast barium enema. The Doctor Who Does Your Colonoscopy Matters 2015-06-16T04:00:00Z In his statement and a later interview, Zuckerman elaborated that his father, thoracic surgeon Dr. Walter Zuckerman, was an early user of a procedure involving radioactive barium. After vaccination vote, tearful senator defends decision 2015-04-24T04:00:00Z In general, the same goes for barium enemas. For Colon Cancer Screening, Cologuard Test Offers A Solid New Option 2015-03-06T05:00:00Z Bulky computer monitors contain lead, barium, chromium and cadmium. Recycling demand increases for electronic devices 2014-10-19T04:00:00Z Cook says contaminants, such as benzene, barium, arsenic, lead and chromium, were also detected in a ditch that runs alongside the pits. Former shipyard now on Superfund cleanup list 2014-09-19T04:00:00Z A second clue was the extremely low abundance of the elements barium and strontium. Hints of elusive early stars found 2014-08-21T04:00:00Z The fluids contained chemicals such as benzene, toluene, barium and chlorides. Prosecutors seek 3-year sentence in fracking case 2014-07-30T04:00:00Z Radium and barium, naturally occurring radioactive elements, are sometimes brought up by drilling, an especially acute problem in North Dakota. Oil drilling in North Dakota raises concerns about radioactive waste 2014-07-26T04:00:00Z They contain nasty substances like potassium nitrate, white phosphorus, barium chlorate and arsenic, so keep the poison control number handy. Recent editorials published in Nebraska newspapers 2014-06-30T04:00:00Z Ordinary double β decay is a form of radioactive decay where elements transmute by jumping two steps ahead in the periodic table — for example, from xenon to barium. Radioactive leak shuts down neutrino study 2014-06-03T04:00:00Z Another veteran was reluctant to undergo a barium enema; a specialized x-ray of the bowel. The VA 'Works' Because Veterans Are Different From You And Me -- They Don't Complain 2014-05-26T04:00:00Z While I was there, I continued to work on isotopic anomalies of other elements, such as chromium and barium, to trace the early stellar environment. Turning point: Liping Qin 2014-04-02T17:20:47.541Z Crystalline 'flower' grown on the nanoscale from the minerals silica and barium carbonate. Nanotech roundup: ultra-colour TV, nano-flowers and Trojan blood cells 2013-06-25T06:00:04Z But the proportion of barium recorded in tooth enamel shot up immediately after birth, because breast milk contains high levels of the element. Infant Tooth Reveals Neandertal Breastfeeding Habits 2013-05-22T21:45:00.720Z Again, the barium levels closely followed the course of breastfeeding and weaning among these animals, rising after birth and then falling to lower concentrations after weaning. How Long Did Neandertals Breastfeed? 2013-05-22T19:00:00Z The researchers then decided to apply the barium test to the fossilized molar of a Neanderthal child, collected in Belgium. From Neanderthal Molar, Scientists Infer Early Weaning 2013-05-22T17:04:43Z In declaring the state of emergency, Peru's environment ministry said tests in February and March found high levels of barium, lead, chrome and petroleum-related compounds at different points in the Pastaza valley. Peru declares environmental state of emergency in its rainforest 2013-03-26T18:42:20Z By assessing ratios of calcium, barium and strontium as well as the number of strontium isotopes, the team was able to deduce both diet and the size of the area that these individuals ranged over. Early Meat-Eating Human Ancestors Thrived While Vegetarian Hominin Died Out 2012-08-08T22:15:07.253Z The results showed that little if any barium was transferred to either humans or macaques before birth, says Arora. Infant Tooth Reveals Neandertal Breastfeeding Habits 2013-05-22T21:45:00.720Z But after 1.2 years, the child—who died at about 8 years of age—was abruptly weaned from breastfeeding, and barium fell to very low levels. How Long Did Neandertals Breastfeed? 2013-05-22T19:00:00Z He also cautioned, “My impression is the physiology and chemistry of nursing is vastly more complicated, and the concentrations of barium are too low that it’s hard to get reliable data.” From Neanderthal Molar, Scientists Infer Early Weaning 2013-05-22T17:04:43Z The relay is a kind of national barium meal – revealing the hidden circulatory system that keeps goodwill, idealism and eccentricity moving around the country. Olympic torch route, day 15: Liverpool unlocks secret of successful Games 2012-06-02T06:00:01Z Of or pertaining to barium; as, baric oxide. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z After that, barium levels dropped rapidly, suggesting a sudden end to breastfeeding. Infant Tooth Reveals Neandertal Breastfeeding Habits 2013-05-22T21:45:00.720Z The teeth begin growing before birth, but while a child is still in the womb the placenta blocks most barium—but not calcium—from reaching their dentine and enamel. How Long Did Neandertals Breastfeed? 2013-05-22T19:00:00Z In concluding their report, the researchers said the barium sampling would most likely be definitive in testing hypotheses about the consequences of later or earlier weaning on Neanderthals, compared with Homo sapiens. From Neanderthal Molar, Scientists Infer Early Weaning 2013-05-22T17:04:43Z The screen of barium platinocyanide is, therefore, another means for revealing the unknown world. Joseph Smith as Scientist A Contribution to Mormon Philosophy 2012-03-12T03:00:27.817Z It is a compound of the carbonates of barium and calcium. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z But sigmoidoscopy and barium enemas are not used much anymore in the United States. Study Offers Evidence That Colonoscopy Reduces Deaths 2012-02-22T22:17:54Z Then, when the child switches from formula to solid food, the barium level goes back down. How Long Did Neandertals Breastfeed? 2013-05-22T19:00:00Z Then the barium pattern in the tooth enamel “returned to baseline prenatal levels, indicating an abrupt cessation of breast-feeding at 1.2 years of age,” the scientists reported on Wednesday in the journal Nature. From Neanderthal Molar, Scientists Infer Early Weaning 2013-05-22T17:04:43Z It released a total of about 44,000 pounds of copper, barium, zinc and lead into Lake Michigan, the federal records said. Chicago News Cooperative: Closing of State Line Power Station, on Illinois-Indiana Border, Is Expected to Leave Problems Behind 2012-02-11T18:54:46Z The ratio of more short-lived isotopes -- barium-140 and its radioactive decay product lanthanum-140--pointed to a second test around May 11. Isotopes Hint at North Korean Nuclear Weapons Tests in 2010 2012-02-03T20:15:16.477Z The materials employed are sand, sulphate of soda, nitrate of soda, calcspar and in some works carbonate of barium. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z Shades of more or less depth or intensity are imparted by adding to the tin chloride a little nitrate of strontium or barium. 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 The findings, which drew strong skepticism from some scientists, were meant to highlight a method of linking barium levels in teeth to dietary changes. From Neanderthal Molar, Scientists Infer Early Weaning 2013-05-22T17:04:43Z The binoxide of barium is pulverized and subjected to the action of carbonic acid to remove any unconverted caustic baryta present. Scientific American, Vol. XXXVII.?No. 2. [New Series.], July 14, 1877 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:29.743Z In the year 1808 he succeeded in decomposing the three earths, lime, baryta and strontia, and in obtaining the metals calcium, barium and strontium, but not in a perfectly pure condition, or in any quantity. Heroes of Science Chemists 2011-12-09T03:00:21.047Z Radioactive barium, cesium, iodine and tellurium were detected March 16 in a radiation plume released by damaged nuclear reactors at Fukushima. Cesium in Baby Milk Powder Shows Nuclear Risk for Japan Food 2011-12-07T05:36:01Z Later, test results of the area commissioned by Range Resources revealed the presence of acetone, toluene, benzene, phenol, arsenic, barium, heavy metals and methane. The Fracturing of Pennsylvania 2011-11-18T23:20:16Z Only the most important components are shown in the table, but all granites contain also small amounts of zirconia, titanium oxide, phosphoric acid, sulphur, oxides of barium, strontium, manganese and water. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z If necessary, the barium bath is repeated, as also the subsequent washings. Scientific American, Vol. XXXVII.?No. 2. [New Series.], July 14, 1877 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:29.743Z The top layer consisted of paints made with zinc, barium, sulfur, and other elements. X-Rays Reveal What Lies Beneath 2011-10-24T12:45:00.267Z Other drugs as adrenalin, barium chloride, physostigmin, etc., while producing experimental arteriosclerosis, hardly could produce the disease in man. Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. 2011-10-11T02:01:07.890Z She alleged that drilling activities had contaminated her with barium. Science Lags as Health Problems Emerge Near Natural Gas Fields 2011-09-19T15:15:09.427Z In the same way, black fixe and barytes, or barium sulphate, also appeared to be useful in strengthening a paint. Paint Technology and Tests 2011-09-15T02:00:12.263Z If this second bath of binoxide of barium does not produce the requisite whiteness, it is introduced into a solution of permanganic acid or permanganate of magnesia before the last washing. Scientific American, Vol. XXXVII.?No. 2. [New Series.], July 14, 1877 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:29.743Z More recently Edmond Fr�my and A. Verneuil obtained artificial rubies by reacting at a red heat with barium fluoride on amorphous alumina containing a small quantity of chromium. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z The gallium salts are precipitated by alkaline carbonates and by barium carbonate, but not by sulphuretted hydrogen unless in acetic acid solution. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z But when Pennsylvania officials investigated, they found her intense exposure to barium hadn't come from drilling—it was a natural seepage into her well. Science Lags as Health Problems Emerge Near Natural Gas Fields 2011-09-19T15:15:09.427Z Lithopone, probably the whitest of pigments, results from the double decomposition of zinc sulphate and barium sulphide, thereby forming a molecular combination of zinc sulphide and barium sulphate. Paint Technology and Tests 2011-09-15T02:00:12.263Z To the filtrate ammonia is added, and then barium chloride, which precipitates the sulphur as barium sulphate. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Of the tests taken while in Moline, the stomach X-ray utilizing barium was my worst. Through these Eyes The courageous struggle to find meaning in a life stressed with cancer 2011-08-14T02:00:18.947Z Of these the sodium, potassium and barium chlorates are best known and have been actually tried, in admixture with some combustible substances, as practical explosives. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z A few years ago phosphorescent salts of barium and calcium were employed in the manufacture of what was known as luminous paint. The Seven Follies of Science [2nd ed.] A popular account of the most famous scientific impossibilities and the attempts which have been made to solve them. 2011-06-30T02:00:34.290Z Blanc fixe is the precipitated form of barium sulphate, resulting from the action of soluble barium salts on soluble sulphates. Paint Technology and Tests 2011-09-15T02:00:12.263Z The screens used for viewing the luminous effects produced by the X-rays are coated with very fine crystals of barium platinocyanide. 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 Despite threats that I must drink the laxative solution or the barium would transform into cement while yet in my intestines, I refused to drink the awful liquid. Through these Eyes The courageous struggle to find meaning in a life stressed with cancer 2011-08-14T02:00:18.947Z All the felspars are silicates containing aluminium with some other metallic base or bases, generally potassium, sodium or calcium, rarely barium, but never magnesium or iron. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 "Fairbanks, Erastus" to "Fens" 2011-06-19T02:00:16.580Z As seen under our modern microscopes, there are few prettier sights than the crystallization of such salts as sal ammoniac, potassic nitrate, barium chloride, etc. The Seven Follies of Science [2nd ed.] A popular account of the most famous scientific impossibilities and the attempts which have been made to solve them. 2011-06-30T02:00:34.290Z The sodium and potassium salts, when heated to 400� C., give oxalates and carbonates of the 669 alkali metals, but the magnesium, calcium and barium salts yield carbonates only. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 "Foraminifera" to "Fox, Edward" 2011-04-22T02:00:08.637Z Last year, the state adopted new regulations that require most plants that accept drilling waste to meet strict standards for removing pollutants, including barium and strontium. Gas Drillers Asked to Change Method of Waste Disposal 2011-04-19T23:57:18Z Mention is here made of the formation of saccharates of barium, strontium, and calcium in low concentrations. The Philippine Agricultural Review Vol. VIII, First Quarter, 1915 No. 1 2011-04-13T02:00:12.527Z The 584 substances in commonest use are:—lime or limestone, to slag off silica and silicates, fluor-spar for lead, calcium and barium sulphates and calcium phosphate, and silica for removing basic substances such as limestone. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z But strontium is midway between calcium and barium in size and properties, so any of it that happens to be around gets crystallized as well. Algae holds promise for nuclear clean-up 2011-03-30T19:45:08.487Z Radioactive barium, cesium, iodine and tellurium have been detected in the plume, the Austrian agency said. Atomic Plume Poses No Serious U.S. Threat 2011-03-17T21:40:43Z The plume is heading over the Pacific Ocean and contains radioactive barium and cesium emitted from the damaged Fukushima Dai-Ichi power plant, Austria’s Meteorological and Geophysics Center said on its website. FAA, Airlines Track Japan Radiation Plume Over Pacific Ocean 2011-03-17T20:34:01Z Barium carbonate.—One of the cheapest and most effective poisons for rats and mice is barium carbonate. House Rats and Mice Farmers' Bulletin 896 2011-03-12T03:00:26.220Z The ester is separated from the solution by means of its barium salt, and the salt decomposed by the addition of the calculated amount of sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z The result is a crystal that is mainly composed of barium, but is massively enriched in strontium. Algae holds promise for nuclear clean-up 2011-03-30T19:45:08.487Z Some 80% is dumped, often burned in pits, releasing pollutants ranging from mercury in flatscreens to toxic heavy metals in a PC's central processing unit or barium in the plastic casings. Can I ditch my computer and be green? 2011-01-30T00:05:27Z Similar sodium, ammonium, lithium, magnesium, calcium, barium and zinc salts have been obtained. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z Many of the victims showed high levels of barium, a heavy metal in the soil that seeps into mushrooms. Tiny, toxic mushrooms kill hundreds in China 2010-07-13T16:02:00Z To prevent discoloration of the fatty acids it is necessary to neutralize the lye with barium carbonate. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. For the moment, she knows that the organism isn't purposefully bringing excess barium and strontium through its cell walls. Algae holds promise for nuclear clean-up 2011-03-30T19:45:08.487Z Baryta forms white crystalline salts with acids, which are all poisonous with the exception of barium sulphate. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis The chromates are stable towards heat; they are poisonous, and may be recognized by the yellow precipitates they give with soluble barium and lead salts. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z Other alkalies are calcic hydroxide or slaked lime, a solution of which in water is known as lime-water; baric hydroxide and strontic hydroxide, derived from the metals barium and strontium. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide The barium carbonate is added through the funnel at the top of the tank mixed with a little water and the lye tested until it is neutral to methyl orange indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. It combines with chlorides of the alkali metals to form double salts, and also with barium, calcium, strontium, and magnesium chlorides. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Barium sulphate is a white substance insoluble in water and in acids, and is the source of most of the barium compounds. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis Butler Burke of Cambridge has also made a series of experiments with radium and barium salts analogous to those of Dubois. The Mechanism of Life That this alcohol would combine with phosphoric acid could be predicted, but that the ester, as obtained by Pelouze, still contained free acidic functions and formed a water-soluble barium salt was a new experience. History of Phosphorus Preparation: 100 grams of barium chloride are dissolved in one liter of distilled water and filtered. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The slight disturbance it manifested with chloride of barium, and the small precipitate with oxalate of ammonia, reveal sulphate of lime, without excluding the possibility of the chloride. The Eruption of Vesuvius in 1872 Artificially-prepared barium sulphate is used as a pigment, Permanent White, also in the paper industry and in vulcanizing rubber. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis In X-Ray laboratory a bismuth or barium meal is given, this meal consists of a pint of fluid, either buttermilk or malted milk, into which a certain amount of bismuth or barium chloride is mixed. Dietetics for Nurses Chemically, chabazite is a complex hydrated calcium and sodium silicate, with a small proportion of the sodium replaced by potassium, and sometimes a small amount of the calcium replaced by barium and strontium. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Fourth—The soap is precipitated with 15 to 20 cubic centimeters of the 10 per cent. barium chloride solution. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Similar, but less definite compounds, are formed with the oxides of lead, manganese, barium, iron, aluminium and chromium. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Other salts of barium of importance are barium chloride, barium nitrate, and barium carbonate, used in pyrotechny and in glass manufacture. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis Discovery of Radium In a similar manner a barium precipitate was obtained from pitchblende which contained a highly active substance. A Brief Account of Radio-activity Thus decinormal jelly solutions of barium chloride and sodium chloride, the latter containing a trace of sodium sulphate, were placed in contact. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" To overcome this objection various metallic peroxides are added to the soap, as sodium peroxide, zinc peroxide and barium peroxide. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The barium and magnesium salts of this acid are formed when baryta and magnesia are fused with cobalt sesquioxide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" Baryta is a heavy greyish powder of specific gravity 4.7, obtained by burning barium in oxygen or from barium nitrate or barium carbonate. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis The pure chloride of this body and barium can be prepared together and then separated by fractional crystallization. A Brief Account of Radio-activity Under the influence of an electromotive force the barium ions moved up the tube, disclosing their presence by the trace of insoluble barium sulphate formed. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Normal chromates on the addition of silver nitrate give a red precipitate of silver chromate, easily soluble in ammonia, and with barium chloride a yellow precipitate of barium chromate, insoluble in acetic acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" Ammonium carbonate is added to the filtrate; this precipitates calcium, strontium and 63 barium. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Quicklime, barium oxide, and dehydrated copper sulphate are especially applicable to alcohol and ether; the last traces of water may be removed by adding metallic sodium and distilling. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 2 "Demijohn" to "Destructor" It is similar in chemical properties to barium. A Brief Account of Radio-activity One of these methods is to place some substance, such as barium chloride, in a calorimeter, noting at what point the mercury remains stationary. A History of Science, Volume 5(of 5) Aspects Of Recent Science Berthollet, and is best prepared by decomposing barium chlorate with the calculated amount of dilute sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" The solution free from barium is treated with ammonia and ammonium sulphate, which precipitates strontium, and the calcium in the solution may be identified by the white precipitate with ammonium oxalate. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The stuff might absorb sunlight, like barium sulphide. Astounding Stories, April, 1931 Other phosphorescent substances, such as barium platino-cyanide, may be substituted for the zinc sulphide, but they do not answer so well. A Brief Account of Radio-activity A piece of barium platinocyanide paper lay on the bench there. Little Masterpieces of Science: Invention and Discovery Caffein aids the action of nitrates, acetanilid, ethyl alcohol and amyl alcohol, and increases the toxicity of barium chloride. All About Coffee In 1808 Davy isolated sodium and potassium; he then turned his attention to the preparation of metallic calcium, barium, strontium and magnesium. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" "Flame-prominences," on the other hand, show, in addition, the characteristic rays of a number of metals, among which iron, titanium, barium, strontium, sodium, and magnesium are conspicuous. A Popular History of Astronomy During the Nineteenth Century Fourth Edition Similarly, by adding barium chloride solution to a solution of a salt of uranium and then precipitating the barium as sulphate, the activity is transferred to this precipitate. A Brief Account of Radio-activity “You will find a sheet of barium paper on the shelf,” he added, and then went away to the coil. Little Masterpieces of Science: Invention and Discovery For this purpose it is employed both in the ground form and in the manufacture of lithopone, a widely used white paint consisting of barium sulphate and zinc sulphide. The Economic Aspect of Geology The next group may contain the white calcium, barium and strontium carbonates. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" In the Brin process for the manufacture of oxygen, barium dioxide is obtained as an intermediate product by heating barium monoxide with air under pressure. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" In some cases the chemical action was determined and these new bodies were found analogous to well-known elements, as radium to barium, polonium to bismuth. A Brief Account of Radio-activity To illustrate my meaning more fully, I will refer to Vol. viii., p. 252., where a correspondent, in his albumen process, adds "chloride of barium, 7� dr." Notes and Queries, Number 204, September 24, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. Lesser amounts go into the manufacture of barium chemicals, which are used in the preparation of hydrogen peroxide, in softening water, in tanning leather, and in a wide variety of other applications. The Economic Aspect of Geology An immediate precipitate indicates barium; a precipitate on standing indicates strontium. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Barium bromide is prepared by saturating baryta-water or by decomposing barium carbonate with hydrobromic acid. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Metallic radium has been prepared by a method similar to that used in the preparation of barium. A Brief Account of Radio-activity I put in this the salt solution, and that I use is thus composed: 2 drachms of sugar of milk, dissolved in 20 ounces of water, adding— Chloride of barium 15 grs. Notes and Queries, Number 208, October 22, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc The mineral barite is a heavy white sulphate of barium, frequently called "barytes" or "heavy spar." The Economic Aspect of Geology To enamel the paper: Dissolve 100 parts of barium nitrate in 500 parts of water, and, on the other hand, 200 parts of sodium sulphate in the same quantity of water. Photographic Reproduction Processes Sir H. Davy tried to electrolyse baryta, but was unsuccessful; later attempts were made by him using barium chloride in the presence of mercury. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" It is a pure white metal, melting at 700°, and far more volatile than barium. A Brief Account of Radio-activity The rays of radium have one hundred thousand times the energy of those of uranium and over one hundred times the energy of barium radiation. The Life Radiant Witherite, the barium carbonate, is a much rarer mineral but is found with barite in some veins. The Economic Aspect of Geology The plain transfer paper is prepared in the same manner, leaving out the barium sulphate and the coloring matters. Photographic Reproduction Processes In this way he obtained an amalgam, from which on distilling off the mercury the barium was obtained as a silver white residue. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Radium forms a series of salts analogous in appearance and chemical action to those of barium. A Brief Account of Radio-activity For the best coated papers, instead of clay, sulphate of lime and sometimes sulphate of barium is used, with glue or casein. The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing All igneous rocks contain at least a trace of barium, which is probably present in the silicates, and these small quantities are the ultimate source of the more concentrated deposits. The Economic Aspect of Geology Should a house painted with a mixture of linseed oil, lead oxid, and barium sulphate go to buildings or coating compositions? The Classification of Patents It can also be obtained by suspending barium carbonate in boiling water and passing in chlorine. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" In the course of time they become colored, especially if mixed barium salts. A Brief Account of Radio-activity Will she be able to illuminate a screen treated with platino-cyanide of barium? The Shadow World A mixture of equal parts of cryolite and barium chloride is very good in soldering bronze or aluminum alloys. Practical Mechanics for Boys It is prepared by treating a mixture of citral and acetone with barium hydrate, and distilling in vacuo. The Handbook of Soap Manufacture L. Maquenne has also obtained it by distilling a mixture of barium amalgam and carbon in a stream of hydrogen. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Ionium expels an alpha particle and becomes radium, which is a bivalent element resembling barium belonging to the second group. A Brief Account of Radio-activity By suitable means the calcium, barium, or lead salts of these cellulose-sulphuric acids can be prepared. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student With barium, the acid furnishes a yellowish-red powder, insoluble in, but made denser by water, which imparts to it a cinnabar colour. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Lime, bog ore, and various metallic salts, such as ferric chloride, barium chloride, and copper sulphate have been suggested, and in some instances are used instead of aluminium sulphate, but the latter is generally employed. The Handbook of Soap Manufacture Barium sulphide, BaS, is obtained by passing sulphuretted hydrogen over heated barium monoxide, or better by fusion of the sulphate with a small coal. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" The alkaline-earth family consists of the very abundant element calcium and the much rarer elements strontium and barium. An Elementary Study of Chemistry In addition to the carburizing materials given, a mixture of 40 per cent of barium carbonate and 60 per cent charcoal gives much faster penetration than charcoal, bone or leather. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel By the last process, superior and more permanent chrome greens may be produced, free from lead, by using chloride of barium or nitrate of bismuth in place of the acetate of lead. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Sulphates.—Twenty c.c. are acidulated with HCl, and the sulphates precipitated with barium chloride; the precipitate is collected on a filter paper, washed, dried, ignited, and weighed, the result being calculated to Na2SO4. The Handbook of Soap Manufacture For the relation of barium to radium, see Radioactivity. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" The corresponding salts of the three elements are very similar to each other and show a regular variation in properties in passing from calcium to strontium and from strontium to barium. An Elementary Study of Chemistry The barium chloride which adheres to the tools is brushed off, leaving the tools as dean as before heating. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Well-crystallized material, such as Iceland-spar, usually consists of perfectly pure calcium carbonate, but at other times the calcium may be isomorphously replaced by small amounts of magnesium, barium, strontium, manganese, zinc or lead. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Sulphates.—These may be precipitated with barium chloride in acid solution, in the usual way, dried, ignited, and weighed. The Handbook of Soap Manufacture Artificially prepared crystals of barytes may be obtained by allowing a solution of a soluble barium salt to diffuse slowly into a solution of a soluble sulphate. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Could calcium chloride be used in place of barium chloride in testing for sulphates? An Elementary Study of Chemistry The barium chloride bath is kept at a temperature of from 2,000 to 2,100°F., and tools are held in it long enough to reach the same temperature. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel In its chemical properties it closely resembles barium and strontium, and to some degree magnesium; these four elements comprise the so-called metals of the "alkaline earths." Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Sulphites give with barium chloride a precipitate soluble in hydrochloric acid. The Handbook of Soap Manufacture The distillate was further purified by digestion with milk of lime, precipitation with water, and further digestion with calcium bromide and barium oxide, and was finally redistilled. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Oxides of lead, zinc, and barium are often used in this way. An Elementary Study of Chemistry By mixing bone charcoal with barium carbonate in the proportions of 60 per cent of the former to 40 per cent of the latter a very reliable compound is obtained. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Roentgenray examination with barium mixture or esophagoscopes simultaneously in situ above and below are useful in the study of such cases. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery An alternative method is to determine the alkalinity before and after the elimination of carbonate by chloride of barium. The Handbook of Soap Manufacture Dilute acid chars paper when the paper is heated; gives a white precipitate with nitrate or chloride of barium, and is entirely volatilized by heat. Aids to Forensic Medicine and Toxicology All sulphates are soluble save those of barium, strontium, and lead. An Elementary Study of Chemistry In the first portion the barium is determined; in the second the barium chloride. Scientific American Supplement, No. 365, December 30, 1882 A postoperative barium roentgenogram should be made in every case as a matter of record and to make certain the proper functioning of the esophagus. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery Sulphates are estimated by precipitation as barium sulphate and calculated to Na2SO4. The Handbook of Soap Manufacture The salts of barium are also cardiac poisons. Aids to Forensic Medicine and Toxicology The sulphides of calcium, barium, strontium, and magnesium are insoluble in water, but are changed by hydrolysis into acid sulphides which are soluble. An Elementary Study of Chemistry The salts of barium give no precipitate with sulphuretted hydrogen in either acid or alkaline solution, but with sulphuric acid they at once give a precipitate, which is insoluble in acetate of soda. A Text-book of Assaying: For the Use of Those Connected with Mines. A great difficulty in this process is that the carbonate of barium fuses at high temperatures, and when fused attacks fireclay goods very powerfully. Scientific American Supplement, No. 717, September 28, 1889 Sulphates.—No appreciable precipitate should be produced on adding hydrochloric acid and barium chloride. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association The residue of the material after digestion with hydrochloric acid and potassium chlorate may have to be examined for silver, lead, and barium. Aids to Forensic Medicine and Toxicology Could lead nitrate be used in place of barium chloride in testing for sulphates? An Elementary Study of Chemistry Test one for sulphates by adding water and barium chloride. A Text-book of Assaying: For the Use of Those Connected with Mines. The barium and potassium nitrates supply the oxygen to the magnesium, which burns with a brilliant white flame. Artificial Light Its Influence upon Civilization Sulphates.—A solution of barium chloride and dilute hydrochloric acid gives a white turbidity. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association A crucible filled with the thermit mixture is set up above the joint and the thermit ignited with a priming of aluminum and barium peroxide to start it off. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries Thus barium sulphate, one of the most insoluble of common substances, dissolves in water to the extent of 1 part in 400,000. An Elementary Study of Chemistry If the soda alone gave a further precipitate of barium carbonate, this may, perhaps, be due to the presence of bicarbonates. A Text-book of Assaying: For the Use of Those Connected with Mines. Lithopone, a white pigment consisting of zinc sulphide and barium sulphate, sometimes exhibits the peculiar property of darkening on exposure to sunlight. Artificial Light Its Influence upon Civilization We select, then, a compound which is a chloride, and a chloride of a metal which forms an insoluble combination with sulphuric acid—chloride of barium, say. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association The barium peroxide having a superabundance of oxygen gives it up readily and the aluminum thus encouraged attacks the iron oxide and robs it of its oxygen. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries How many grams of barium dioxide will be required to prepare 1 kg. of common hydrogen dioxide solution? An Elementary Study of Chemistry When cold, extract with water, and determine the sulphur volumetrically with standard barium chloride. A Text-book of Assaying: For the Use of Those Connected with Mines. Among the ingredients are barium nitrate, potassium perchlorate, powdered aluminum, powdered magnesium, potassium nitrate, and sulphur. Artificial Light Its Influence upon Civilization Radium is a metallic element chemically resembling barium. The Birth-Time of the World and Other Scientific Essays I laid down poisonous pills composed of barium carbonate and flour. Punch, or the London Charivari, Volume 159, July 14th, 1920 The barium carbonate can then be filtered off and converted into any desired salt by the processes already described. An Elementary Study of Chemistry In determining it, it is first converted into sulphuric acid, and then precipitated and weighed as barium sulphate. A Text-book of Assaying: For the Use of Those Connected with Mines. The potassium nitrate takes fire more readily than the barium nitrate, but it is more expensive than the latter. Artificial Light Its Influence upon Civilization Thus diads such as magnesium, calcium, barium, etc., are very much more efficient than monads such as sodium, potassium, etc., and again, triads such as aluminium are, similarly, very much more powerful than diad atoms. The Birth-Time of the World and Other Scientific Essays When dissolved in warm water, to which a little nitric acid has been added, nitrate of silver and chloride of barium should produce no precipitates. The Art of Perfumery And Methods of Obtaining the Odors of Plants All hydroxides are insoluble save those of ammonium, sodium, potassium, calcium, barium, and strontium. An Elementary Study of Chemistry In the latter case, the silica will be converted into fluoride, which will be driven off, and the impurities will be left behind as sulphates of barium, phosphate and oxide of tin, titanium, &c. A Text-book of Assaying: For the Use of Those Connected with Mines. Sulphates After acidulating with nitric acid, it gives a precipitate with barium nitrate. Scientific American Supplement, No. 561, October 2, 1886 The baryta is a heavy grayish porous substance prepared by carefully igniting the nitrate of barium; and of this each retort having the above dimensions holds about 125 lb. Scientific American Supplement, No. 623, December 10, 1887 We have not examined barium, wolfram, or uranium. Occult Chemistry Clairvoyant Observations on the Chemical Elements Thus calcium, strontium, and barium are very much alike; so, too, are magnesium, zinc, and cadmium. An Elementary Study of Chemistry This may be tested for by dissolving, say, 2 grams in a little water and adding barium chloride. A Text-book of Assaying: For the Use of Those Connected with Mines. When the lacquer is to be dried at a high temperature barium sulphate is preferable, but when it is dried at an ordinary temperature bismuth oxychloride is better. Handbook on Japanning: 2nd Edition For Ironware, Tinware, Wood, Etc. With Sections on Tinplating and Galvanizing He proposes to replace the methods hitherto employed by one which depends upon the formation of a barium salt of starch, to which he assigns the formula BaO.C24H40O20. Scientific American Supplement, No. 623, December 10, 1887 No.6 shows the numerous lines and bands of barium—several red, orange, yellow, and four are very bright green ones. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Write equations to represent the reactions involved in the preparation of barium chloride from heavy spar. An Elementary Study of Chemistry There may be formed a white precipitate of barium carbonate, which if filtered off, washed and treated with acid, will dissolve with effervescence. A Text-book of Assaying: For the Use of Those Connected with Mines. Many white pigments, such as zinc oxide, zinc sulphide, calcium carbonate, barium carbonate, calcium sulphate, lead white, etc., turn brown to black, and no white lacquer can be obtained with them. Handbook on Japanning: 2nd Edition For Ironware, Tinware, Wood, Etc. With Sections on Tinplating and Galvanizing The chloride of barium produces the deepest color. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations The elements known to exist in the sun are salt, iron, hydrogen, Page 271 magnesium, barium, copper, zinc, cromium, and nickel. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Could barium hydroxide be used in place of calcium hydroxide in testing for carbon dioxide? An Elementary Study of Chemistry The solution contains the barium as baric chloride mixed, perhaps, with salts of strontium or lime. A Text-book of Assaying: For the Use of Those Connected with Mines. It is a nitro-cellulose powder, a mixture of insoluble and soluble nitro- cellulose together with the nitrates of barium and potassium, and a small percentage of calcium carbonate. Nitro-Explosives: A Practical Treatise The substance becomes reduced to sulphide of barium and sulphide of strontium, when it should be dissolved in hydrochloric acid. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations He took two equal weights of a salt of radium and a salt of barium, which he made oscillate one after the other in a torsion balance. The New Physics and Its Evolution Thus manganese dioxide, a black compound of manganese and oxygen, when heated to about 700°, loses one third of its oxygen, while barium dioxide, when heated, loses one half of its oxygen. An Elementary Study of Chemistry The aqueous extract contains the alkalies with the excess of barium. A Text-book of Assaying: For the Use of Those Connected with Mines. It consists of a mixture of nitro-cellulose, paraffin, barium, nitrate, and some other ingredients. Nitro-Explosives: A Practical Treatise "You will find a sheet of barium paper on the shelf," he added, and then went away to the coil. McClure's Magazine, Vol. 6, No. 5, April, 1896 Had the durations of oscillation been different, it might be concluded that the mechanical mass is not the same for radium as for barium. The New Physics and Its Evolution What weight of barium sulphate will be formed at the same time? An Elementary Study of Chemistry Solution.—All sulphates, excepting those of lead, barium, strontium, and lime, are soluble in water or dilute acid. A Text-book of Assaying: For the Use of Those Connected with Mines. It consists of a mixture, nitro-cellulose and the nitrates of barium and potassium. Nitro-Explosives: A Practical Treatise Then I found the shelf on the side next the tube, and then the sheet of paper prepared with barium platino-cyanide. McClure's Magazine, Vol. 6, No. 5, April, 1896 Radium is characterised by a special spectrum, and its atomic weight, as determined by Madame Curie, is 225; it is consequently the higher homologue of barium in one of the groups of Mendeléef. The New Physics and Its Evolution It is commonly prepared by the action of a solution of sulphuric acid on barium dioxide. An Elementary Study of Chemistry If necessary, evaporate the bulk to about 200 c.c., render faintly acid with hydrochloric acid, and add 20 c.c. of solution of barium chloride; allow to stand for half-an-hour, and decant through a filter. A Text-book of Assaying: For the Use of Those Connected with Mines. The aqueous solution will contain the nitrate of barium. Nitro-Explosives: A Practical Treatise A piece of barium platino-cyanide paper lay on the bench there. McClure's Magazine, Vol. 6, No. 5, April, 1896 The new substances were proved to be compounds chemically very similar to salts of barium. The Story of Alchemy and the Beginnings of Chemistry It is a brown powder which easily gives up a part of its oxygen and, like manganese dioxide and barium dioxide, is a good oxidizing agent. An Elementary Study of Chemistry Lead sulphate may be extracted by boiling with ammonic acetate; whilst barium, strontium, and, perhaps, calcium sulphate, will be mainly found in the residue insoluble in acids. A Text-book of Assaying: For the Use of Those Connected with Mines. Acetone is usually prepared, however, by the dry distillation of crude calcium or barium acetate. Nitro-Explosives: A Practical Treatise These impurities are determined by well-known methods; sulphur is oxidized and precipitated with barium chloride, lead by sulphuric acid and alcohol. Scientific American Supplement, No. 455, September 20, 1884 It is described by her as a white, hard, metal-like solid, which reacts with water at the ordinary temperature, as barium does. The Story of Alchemy and the Beginnings of Chemistry The chromates of lead and barium separate as yellow precipitates. An Elementary Study of Chemistry The residue may contain sulphates of lead, barium, or lime; it must be separately examined, if the total sulphur is wanted. A Text-book of Assaying: For the Use of Those Connected with Mines. The colouring matter used is aurine, and the small quantity of nitrate used is the barium salt. Nitro-Explosives: A Practical Treatise By adding chloride of barium solution the sulphuric acid is bound to the barytes and sulphate of baryta separates as white precipitate. Scientific American Supplement, No. 821, September 26, 1891 Their compositions were determined on the supposition that they were salts of an unknown metal closely allied to barium. The Story of Alchemy and the Beginnings of Chemistry It is not isomorphous with the orthorhombic barium and strontium sulphates, as might be expected from the chemical formulae. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 In this last case it may be examined for barium and strontium, the former of which will rarely be present. A Text-book of Assaying: For the Use of Those Connected with Mines. It contains about 75 per cent. of nitrate of ammonium, with the addition of nitrate of barium, wood meal, and starch. Nitro-Explosives: A Practical Treatise Sole leather is nine times out of ten given false weight by forcing entirely foreign substances into the leather, such as glucose, barium chloride, magnesium chloride, resins, etc. Scientific American Supplement, No. 803, May 23, 1891 It is indeed a phosphori as, if I recall it aright, the sulphides of barium, strontium, and calcium were upon our earth. The Certainty of a Future Life in Mars It should be borne in mind that the quantity of barium sulphate in this !saturated solution is a constant quantity! for the existing conditions. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Collect, wash, dry, ignite, and weigh the barium sulphate. A Text-book of Assaying: For the Use of Those Connected with Mines. The sodium, ammonium, and barium salts are, however, easily soluble in water. Nitro-Explosives: A Practical Treatise Mr. Thilmany has patented still another combination, in which he uses sulphate of zinc and chloride of barium, which has been noticed under the head of burnettizing. Scientific American Supplement, No. 514, November 7, 1885 Aqueous alcohol becomes turbid when mixed with benzene, carbon disulphide or paraffin oil; when added to a solution of barium oxide in absolute alcohol, a white precipitate of barium hydroxide is formed. The Project Gutenberg Encyclopedia Volume 1 of 28 Iron is usually found in the precipitate of barium sulphate when thrown down from hot solutions in the presence of ferric salts. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Compounds of barium are often used by the assayer, more especially the chloride and hydrate. A Text-book of Assaying: For the Use of Those Connected with Mines. The nitrates of potassium and barium are also used admixed with nitro- cellulose in several of the sporting smokeless powders. Nitro-Explosives: A Practical Treatise This applies to the sulphate of copper and barium process. Scientific American Supplement, No. 514, November 7, 1885 The barium carbonate used in the process acts as a contact substance, since the temperature at which the operation is carried out is always above the decomposition point of barium acetate. The Project Gutenberg Encyclopedia Volume 1 of 28 The contamination of the barium sulphate by iron is much less in the presence of ferrous than ferric salts. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The principle and mode of working of this is the same as that given under the Sulphur Assay; but using a standard solution of sulphuric acid instead of one of barium chloride. A Text-book of Assaying: For the Use of Those Connected with Mines. This is especially the case with the chlorides of potassium or barium, the bromides of strontium or calcium, and the iodides of aluminum or magnesium. Scientific American Supplement, No. 401, September 8, 1883 A blank experiment must be done with each new lot of peroxide of hydrogen obtained, which always gives under 0.1 barium sulphate with me. Scientific American Supplement, No. 362, December 9, 1882 The last bulb, which serves as a check to control the operation, remains clear, and proves that no binoxide of barium is formed. Scientific American Supplement, No. 358, November 11, 1882 Acidify the filtrate with hydrochloric acid until just acid, bring to boiling, and slowly add hot barium chloride solution, as in the preceding determination. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Moreover, the use of hot concentrated hydrochloric acid causes a loss by dissolving barium sulphate. A Text-book of Assaying: For the Use of Those Connected with Mines. If sulphuric acid is present it must be separated by treating the solution of the compound with barium chloride and filtering. Scientific American Supplement, No. 324, March 18, 1882 First of all men after the discoverer, Robert saw the gold mass, when the electrodes were again applied to it, change swiftly and successively to barium, to tin, to silver, to copper, to iron. The Doings of Raffles Haw The liquid that had passed over was neutralized with barium carbonate, and the filtrate concentrated, when it yielded crystals, which were recognized as nearly pure acetate. Scientific American Supplement, No. 288, July 9, 1881 As the sodium sulphate is soluble in water, and the barium carbonate insoluble, a separation between them is possible and the sulphur can be determined in the water-soluble portion. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Fill an ordinary 100 c.c. burette with the solution of barium chloride. A Text-book of Assaying: For the Use of Those Connected with Mines. Already, for a long time, efforts have been made to find some means for this purpose, and we have reached good results with lime and chloride of barium, as well as with magnesia preparations. Scientific American Supplement, No. 286, June 25, 1881 The author has succeeded in preparing barium pentathionate thus: A Wackenroder solution was about half neutralized with barium hydrate, filtered, and the clear solution evaporated in vacuo over sulphuric acid. Scientific American Supplement, No. 275, April 9, 1881 It is then usual to precipitate the sulphuric acid by adding solution of barium chloride to the boiling liquid, allowing it to cool and settle, and then filtering. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power It should be noted that this method can be applied to the purification of a precipitate of barium sulphate if contaminated by most of the substances mentioned in Note 3 on page 114. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes To that which accompanied barium taken from the same ore they called Radium and to the substance which was found among the rare earths of the pitchblende Debierne gave the name Actinium. Marvels of Modern Science The proportions of cost by using chloride of barium, magnesia preparation, carbonate of soda, will be 6 : 5 : 4. Scientific American Supplement, No. 286, June 25, 1881 After eighteen days crystals, which proved to be barium pentathionate + 3 molecules of water, formed. Scientific American Supplement, No. 275, April 9, 1881 The weight of barium sulphate obtained by ignition of the filter and its contents, multiplied by 0.137, gives the amount of sulphur present in the acetylene in the form of sulphuretted hydrogen. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Each of the two atoms of sulphur will form upon oxidation a molecule of sulphuric acid or a sulphate, which, in turn, will require a molecule of the barium chloride for precipitation. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The insoluble barium and radium sulphates, after being converted into chlorides or bromides, are separated by repeated fractional crystallization. Marvels of Modern Science It is surprising, judging from animals, that lead and barium should not be poisonous. Insectivorous Plants I then out of curiosity had another barium enema and X-ray to validate my results. How and When to Be Your Own Doctor Time of half Radio- Properties decay activity Radium About 2600 years alpha rays Element chemically analogous to barium. Darwin and Modern Science To determine the quantity of the barium chloride required, it is necessary to include in its molecular weight the water of crystallization, since this is inseparable from the chloride when it is weighed. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Several other elementary earths met the same fate when subjected to the electrical influence; the metals barium, calcium, and strontium being thus discovered. A History of Science — Volume 4 But it is a singular fact that the chloride of lead and two salts of barium were not poisonous to this plant. Insectivorous Plants Similar conditions prevail when, for example, silver ions react with chloride ions, or barium ions react with sulphate ions. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Radium resembles barium in its chemical properties, and is precipitated with barium in the ordinary course of chemical analysis. Darwin and Modern Science Calculate the grams of calcium oxide and barium oxide in the mixture. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes It is separated by a prolonged course of successive crystallisation, the chloride of radium being less soluble than that of barium, and therefore sooner separated from an evaporating solution. Darwin and Modern Science Two salts of calcium, four of magnesium, two of barium, and two of strontium, did not cause any inflection, and thus follow the rule of the preponderant power of the base. Insectivorous Plants As thus prepared, radium is a well-marked chemical element, forming a series of compounds analogous to those of barium and showing a characteristic line spectrum. Darwin and Modern Science |
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