| 单词 | boron |
| 例句 | By contrast, Lauritsen and his Caltech colleagues soberly devoted two full pages to a meticulous accounting of every step they had taken to validate the French findings on carbon and boron alone. Big Science 2015-07-07T00:00:00Z “Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine,” I say. What If It's Us 2018-10-09T00:00:00Z At the Cavendish, gold resisted the disintegration effect, except for a modest result the scientists traced to contamination of the heavier targets by light impurities such as boron. Big Science 2015-07-07T00:00:00Z The result of their bombardments of boron and other light elements by alpha rays, moreover, had led them to propose that the proton was composed of a neutron and a positive electron, or positron. Big Science 2015-07-07T00:00:00Z The Joliots had hypothesized that the same radioactivity they had induced in boron with alpha particles would be produced by deuterons acting on carbon. Big Science 2015-07-07T00:00:00Z Lawrence camouflaged his frustration by ordering up a lab-wide effort to expand the Joliots’ findings beyond aluminum, magnesium, and boron to heavier elements. Big Science 2015-07-07T00:00:00Z And although the element boron specifically is considered essential for plants and some animals, its role in the functioning of the human body is less clear. A new TikTok trend has people drinking toxic borax. An expert explains the risks 2023-07-26T04:00:00Z Borax, or sodium borate decahydrate, is a salt made of a combination of boron, sodium, oxygen and hydrogen. A new TikTok trend has people drinking toxic borax. An expert explains the risks 2023-07-26T04:00:00Z "Blue diamonds are rare because boron doesn't happen very often down there, so it's going to tell us more about the why, how, and maybe the when as well," she added. Rare flawless 'Blue Moon Diamond' goes on display in Los Angeles 2014-09-12T04:00:00Z “Dual phase and boron steels will contribute to that weight savings, but most of the weight reduction will come from aluminum.” Tough Guy Test: Would You Buy A Pickup Truck Made Of Aluminum? 2012-07-26T20:59:48Z The very small amount of boron your body may need can be safely obtained by eating a diet rich in fruits and vegetables. A new TikTok trend has people drinking toxic borax. An expert explains the risks 2023-07-26T04:00:00Z If the yellowing is accompanied by browning on the leaf edge, the problem could be salt or boron accumulation in the soil. Why is this tree losing its leaves? Here are some possibilities 2023-09-06T04:00:00Z Experts say social media users appear to be conflating boron, a naturally occurring mineral, with borax, which is also naturally occurring and is produced when boron is combined with sodium, hydrogen and oxygen. NOT REAL NEWS: A look at what didn’t happen this week 2023-07-28T04:00:00Z There are also some nutrients you don’t need in a supplement: biotin, boron, chloride, iodine, manganese, molybdenum, nickel, pantothenic acid, phosphorous, silicon, tin and vanadium. Should older adults consider a multivitamin for brain health? 2023-07-10T04:00:00Z Important micronutrients include iron, manganese, boron, molybdenum, copper, zinc, chlorine, nickel, cobalt, silicon and sodium. Fundamentals of Biology 2015-01-01T00:00:00Z Lithium has only one electron in its outermost shell, beryllium has two electrons, boron has three, and so on, until the entire shell is filled with eight electrons, as is the case with neon. Concepts of Biology 2013-04-25T00:00:00Z If the problem is excess salt or boron, thoroughly flushing the soil should correct the problem. Why is this tree losing its leaves? Here are some possibilities 2023-09-06T04:00:00Z Various companies also make boron pills as dietary supplements for human consumption but the verdict is out on whether they’re truly beneficial, she said. NOT REAL NEWS: A look at what didn’t happen this week 2023-07-28T04:00:00Z But engineers have now found an exception: when they applied intense pressure to boron arsenide, a recently discovered semiconductor material, thermal conductivity decreased. Strange Material Breaks a Classic Rule of Physics 2023-04-28T04:00:00Z Alternative fuel made of protons and boron generates no neutrons and produces only harmless helium, but requires a temperature of 3 billion degrees Celsius—200 times the heat of the Sun’s core—to burn. News at a glance: Monkey shipments, a controversial visa, and support for geoengineering research 2023-03-01T05:00:00Z TAE is following a different recipe: fusing hydrogen nuclei—protons—with easily mined boron. Reactor experiment demonstrates alternative fusion scheme 2023-02-28T05:00:00Z The fuel for the new engine is boron powder that burns rapidly once in contact with oxygen. Space Force leader warns on China space threat 2023-02-22T05:00:00Z “We don’t fully understand all the ways that boron may affect the human body,” Johnston-Arbor explained. NOT REAL NEWS: A look at what didn’t happen this week 2023-07-28T04:00:00Z To test those predictions, Hu and his colleagues placed a tiny piece of boron arsenide less than 100 microns thick in the gap between two diamonds. Strange Material Breaks a Classic Rule of Physics 2023-04-28T04:00:00Z The researchers chose a widely available alloy of iron, nickel, boron and molybdenum, a combination already used in other kinds of sensors. Tiny ‘Rover’ Explores Cells without Harming Them 2022-11-21T05:00:00Z Researchers have already shown they can fuse protons and boron by using particle beams aimed at a solid target or by blasting plasma with lasers. Reactor experiment demonstrates alternative fusion scheme 2023-02-28T05:00:00Z Researchers introduced boron powder into the combustion chamber using multiple nozzles that produced shock waves that slowed the air intake. Space Force leader warns on China space threat 2023-02-22T05:00:00Z Jeffrey Bernstein, medical director for the Florida Poison Information Center in Miami, said a healthy, balanced diet should provide all the boron a person requires. NOT REAL NEWS: A look at what didn’t happen this week 2023-07-28T04:00:00Z The researchers used ultrafast optics, spectroscopy and x-rays to document how boron arsenide's thermal conductivity begins to decrease as heat propagates across the sample and it is subjected to intense pressure. Strange Material Breaks a Classic Rule of Physics 2023-04-28T04:00:00Z The plant has adapted to live in boron and lithium-rich soil of the landscape, and with only roughly 40,000 existing plants in the wild, biologists have said it warrants immediate protection under the ESA. How a rare plant species could hinder a needed lithium mine 2022-11-20T05:00:00Z In the experiments, a boron plasma was heated to 20 million degrees Celsius or so and beams of neutral hydrogen atoms were fired into the plasma. Reactor experiment demonstrates alternative fusion scheme 2023-02-28T05:00:00Z Prof Chen and his colleagues have found that they can use this to store gases including hydrogen in boron nitride powder. Why an old train could point to a clean energy future 2022-11-07T05:00:00Z We can illustrate the comparison of orbitals and electron distribution in an isolated boron atom and in the bonded atom in BH3 as shown in the orbital energy level diagram in Figure 8.13. Chemistry 2019-02-14T00:00:00Z In prior studies, Hu and other researchers identified boron arsenide as having exceptionally high thermal conductivity. Strange Material Breaks a Classic Rule of Physics 2023-04-28T04:00:00Z The light elements lithium, beryllium, and boron hold the key. Astronomy 2016-10-13T00:00:00Z A reactor running on protons and boron would remove many of the challenges engineers face as they try to move fusion from scientific demonstration to practical electricity generator. Reactor experiment demonstrates alternative fusion scheme 2023-02-28T05:00:00Z Examples include copper, arsenic, mercury, fluorine, sodium, and boron. Physical Geology 2015-01-01T00:00:00Z We redistribute the three valence electrons of the boron atom in the three sp2 hybrid orbitals, and each boron electron pairs with a hydrogen electron when B–H bonds form. Chemistry 2019-02-14T00:00:00Z They applied pressure to the diamond sandwich to create a force on the boron arsenide hundreds of times greater than that at the bottom of the ocean. Strange Material Breaks a Classic Rule of Physics 2023-04-28T04:00:00Z There are side reactions involving nuclei of such elements as beryllium and boron. Astronomy 2016-10-13T00:00:00Z Some detergents contain boron, which is toxic to plants; bleach also makes soil less healthy. One way around California's water restrictions: Recycle water from your laundry 2022-05-04T04:00:00Z Nanaimo Group groundwater can also have elevated levels of boron, again related to pH and adsorption from clay minerals. Physical Geology 2015-01-01T00:00:00Z The metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. Chemistry 2019-02-14T00:00:00Z It is refining a technique called boron neutron capture therapy with a view to its use in cancer treatment. Fusion race kicked into high gear by smart tech 2022-02-09T05:00:00Z The light elements lithium, beryllium, and boron are far more abundant in cosmic rays than in the Sun and stars. Astronomy 2016-10-13T00:00:00Z Many types of detergent have salts and boron that can build up in soil, making it less fertile and even damaging to some kinds of plants. One way around California's water restrictions: Recycle water from your laundry 2022-05-04T04:00:00Z While boron at the levels found there is not toxic to humans, there is enough boron in some wells to be toxic to plants, and the water cannot be used for irrigation. Physical Geology 2015-01-01T00:00:00Z In this section, we will briefly discuss the chemical behavior of metalloids and deal with two of these elements—boron and silicon—in more detail. Chemistry 2019-02-14T00:00:00Z Next, the researchers added tiny flakes of boron nitride, which flow easily and help fill any spaces between the metal oxides as the glass forms. New lava-like coating can stop fires in their tracks 2022-01-06T05:00:00Z When you said “boron” I immediately thought “glue.” Garden Q&A: How to remove invasive grass, compost cardboard and more 2022-01-06T05:00:00Z For example, the glue in cardboard boxes and paper bags contains boron, an element that can inhibit plant growth at excessive levels. Give your plants a boost with fireplace ash, plus more winter garden advice 2021-11-30T05:00:00Z For example, the ceramic plates fitted into body armour are becoming better, with newer versions using materials such as boron carbide. The battle to make lighter life-saving body armour 2021-10-18T04:00:00Z Borate anions range from the simple trigonal planar ion to complex species containing chains and rings of three- and four-coordinated boron atoms. Chemistry 2019-02-14T00:00:00Z Salt isn’t the only thing that hangs out in seawater: There’s also often a lot of boron, which isn’t good for crops and in large concentrations might be unhealthy for humans. Desalination can make saltwater drinkable — but it won’t solve the U.S. water crisis 2021-09-28T04:00:00Z And, indeed, corrugated cardboard is glued together with a plant-based paste to which boron is added to improve the adhesive properties. Garden Q&A: How to remove invasive grass, compost cardboard and more 2022-01-06T05:00:00Z Two pipelines snake through a dry-wash canyon delivering water to the town’s historic mineral plant, where it is used in the production of soda ash, boron and salt. A 7.1 earthquake couldn't kill this Mojave Desert town. But a water war just might 2021-09-23T04:00:00Z Use only liquid laundry detergents free of boron. How to Collect Greywater 2021-07-06T04:00:00Z Calculate the percent abundances leading to the two values of the average atomic masses of boron from these two countries. Chemistry 2019-02-14T00:00:00Z Dangerous fireworks include rockets, firecrackers, roman candles and those made with a variety of chemicals like boron and arsenic sulfide. No such thing as 'safe and sane' fireworks in a bone-dry California primed to burn 2021-07-02T04:00:00Z For example, when a soil test indicated that my raised beds required boron, I applied borax laundry additive. Garden Q&A: How to remove invasive grass, compost cardboard and more 2022-01-06T05:00:00Z TAE wants to use an alternative fuel of hydrogen and boron, plentiful elements that produce many fewer neutrons when they fuse. With ‘smoke ring’ technology, fusion startup marks steady progress 2021-04-08T04:00:00Z Dr. Jurikova and her team discovered spikes of the element boron — a proxy for acidity levels — in fossil brachiopod shells found in rocks in Italy that stretch across the extinction boundary. Burning Fossil Fuels Helped Drive Earth’s Most Massive Extinction 2020-11-18T05:00:00Z This suggests the best Lewis structure has three B–F single bonds and an electron deficient boron. Chemistry 2019-02-14T00:00:00Z Coal ash is known to contain many toxic metals, but boron is the primary contaminant the EPA is worried about. EPA eyes cleanup of coal ash threatening Indiana Dunes 2020-07-25T04:00:00Z What remains can be very valuable as a soil amendment, as it provides such essential plant nutrients as phosphorus, potassium and boron. Garden Q&A: How to remove invasive grass, compost cardboard and more 2022-01-06T05:00:00Z Among the chemicals emitted were boron, selenium, cadmium and mercury, exposure to which can harm the brain, kidneys, lungs and immune system. Indiana negotiates deal with worst utility permit violator 2020-06-13T04:00:00Z Krivanek and colleagues were able for the first time to clearly distinguish small atoms bonded side by side in a film of boron nitride one atom thick. Kirkland master of the electron microscope wins one of science’s biggest prizes 2020-05-27T04:00:00Z The reactivity of the compound is also consistent with an electron deficient boron. Chemistry 2019-02-14T00:00:00Z At the heart of his new creations was boron, though boron played different roles in each of Schott's new glasses. How the invention of new types of glass drove scientific discovery 2020-04-24T04:00:00Z How could the mind of a fifth-grader possibly focus his mind on boron and argon with Tom Terrific on the mound? Reporter's Notebook: Before impeachment hearings, a journalist's homework 2019-11-19T05:00:00Z They want to use hydrogen and boron as both elements are readily available and non-radioactive. Nuclear fusion: 'A question of when, not if' 2019-11-06T05:00:00Z Dr. Henehan and his team measured the boron, and found that the relative proportions of two isotopes of the element changed abruptly right at the time of the impact. The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash 2019-10-21T04:00:00Z An atom like the boron atom in BF3, which does not have eight electrons, is very reactive. Chemistry 2019-02-14T00:00:00Z For glasses that did not expand when heated, Schott added lots of boron. How the invention of new types of glass drove scientific discovery 2020-04-24T04:00:00Z They measured boron isotopes, which helped them understand the changes in the ocean’s acidity. Dinosaurs became extinct from the same horrifying conditions plaguing our oceans 2019-10-22T04:00:00Z The synthesized hBN crystals, together with uncrystallized boron nitride powder, are contained in a molybdenum capsule.Credit: Meet the crystal growers who sparked a revolution in graphene electronics 2019-08-20T04:00:00Z In shells like these, Dr. Planavsky explained, proportions of the boron isotopes shift when the acidity of the oceans rises. The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash 2019-10-21T04:00:00Z The boron atom in boron trifluoride, BF3, has only six electrons in its valence shell. Chemistry 2019-02-14T00:00:00Z In some places, the atoms in the boron nitride layers line up precisely with the carbon atoms in the graphene layers, but a few nanometers away they are offset. Trilayer graphene shows signs of superconductivity 2019-07-17T04:00:00Z They also reconstructed water-column pH gradients with the help of Earth system modeling, and found the proportions of the boron isotopes change when the acidity of the oceans increases. Dinosaurs became extinct from the same horrifying conditions plaguing our oceans 2019-10-22T04:00:00Z Hexagonal boron nitride is also becoming recognized as a fascinating 2D material in its own right. Meet the crystal growers who sparked a revolution in graphene electronics 2019-08-20T04:00:00Z The University of New Mexico and Los Alamos National Laboratory are partnering on a research project studying interactions of boron and ribose in groundwater on Mars. BYU helping NASA prep for human mission to Mars 2019-07-04T04:00:00Z The metalloid boron exhibits many similarities to its neighbor carbon and its diagonal neighbor silicon. Chemistry 2019-02-14T00:00:00Z Inspectors also treat poles with a boron rod, which is drilled into the wood and then diffuses its payload throughout the pole to repel insects and fungus. With lawsuits possible, Seattle City Attorney’s Office takes over power-pole collapse investigation 2019-04-18T04:00:00Z But the intensity of color is only loosely correlated with the concentrations of boron. How Diamonds Gain Color 2019-03-25T04:00:00Z Back in his lab, he prepares the next batch — number 943 — filling a fresh thimble-sized capsule with white discs of boron nitride the size of breath mints. Meet the crystal growers who sparked a revolution in graphene electronics 2019-08-20T04:00:00Z A Washington University law clinic recently found excessive levels of arsenic, boron and other harmful chemicals near all ponds that are receiving coal ash waste. EPA critical of some elements of Missouri coal ash plan 2019-03-24T04:00:00Z However, boron has one distinct difference in that its 2s22p1 outer electron structure gives it one less valence electron than it has valence orbitals. Chemistry 2019-02-14T00:00:00Z Infusing boron into the carbon steel strengthens the material, allowing for a thinner face and better weight distribution. The best players-distance irons of 2019: 11 options to give you a power boost - Golf Digest 2019-03-05T05:00:00Z That method focused on boron-11, a different element, in shell calcite. Ancient plankton have climate data hidden in their shells 2019-01-31T05:00:00Z 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 But many of the toys use the mineral borax, which contains boron, to help create their stickiness. Hamleys pulls slime toy amid safety fears 2018-12-12T05:00:00Z Silicon’s empty d orbitals and boron’s empty p orbital enable tetrahedral silicon compounds and trigonal planar boron compounds to act as Lewis acids. Chemistry 2019-02-14T00:00:00Z The authors report lifetimes for such polaritons of up to 20 ps, which is about ten times longer than the best values reported for hexagonal boron nitride9. Precise control of infrared polarization using crystal vibrations 2018-10-23T04:00:00Z Ultimately, it is the color — which is dependent on the amount of the element boron the gem captures — that holds the key to understanding Earth’s unknown depths. How rare blue diamonds form deep below the ocean floor 2018-09-23T04:00:00Z The remnants of burned coal include arsenic, boron, lead and mercury, which are known carcinogens and damage organs, among other health effects. What Is Coal Ash and Why Is It Dangerous? 2018-09-22T04:00:00Z The boron strengthens the steel, allowing for a thinner face and better weight distribution. Mizuno JPX919 iron series finds new distance, feel and forgiveness in new metals and manufacturing - Golf Digest 2018-08-29T04:00:00Z Control rods are made of boron, cadmium, hafnium, or other elements that are able to absorb neutrons. Chemistry 2019-02-14T00:00:00Z There should not be any boron to speak of within the interior, where diamonds grow. The Hope Diamond was spawned in the most hellish depths of Earth, study suggests 2018-08-01T04:00:00Z Ultimately, it is the color—which is dependent on the amount of the element boron the gem captures—that holds the key to understanding Earth’s unknown depths. How Rare Blue Diamonds Form Deep below the Ocean Floor 2018-08-01T04:00:00Z So where did these diamonds get their boron from? The origin of blue diamonds 2018-07-31T04:00:00Z But consumer group Which? is warning parents that some children's slime toys contain potentially unsafe levels of a chemical called boron. In a hurry? Here's what you need to know this morning 2018-07-17T04:00:00Z The average atomic mass for boron is calculated to be: Chemistry 2019-02-14T00:00:00Z An investigation by the consumer group into 11 popular slime products found eight contained higher than recommended levels of a chemical called boron. Fears over chemical found in slime toys 2018-07-16T04:00:00Z Over the course of hundreds of millions to billions of years, the seafloor absorbs boron. How Rare Blue Diamonds Form Deep below the Ocean Floor 2018-08-01T04:00:00Z The products found with above the recommended 300mg/kg level of boron were: Parents warned over 'toxic' slime 2018-07-16T04:00:00Z It also says they should be careful when making "homemade slime" because some ingredients - such as some contact lens solutions - contain a form of boron. In a hurry? Here's what you need to know this morning 2018-07-17T04:00:00Z Thus we see that BCl3 contains three bonds, and there are no lone pairs of electrons on boron. Chemistry 2019-02-14T00:00:00Z Inside the reactor a boron control rod will slide into a pile of uranium and start a nuclear chain reaction, splitting uranium atoms apart and releasing heat. Will NASA Go Nuclear to Return to the Moon? 2018-05-15T04:00:00Z The boron, encompassed by rock that protects the mineral from the mantle’s high pressure and heat, continues on its path hundreds of miles downward until it reaches the lower mantle. How Rare Blue Diamonds Form Deep below the Ocean Floor 2018-08-01T04:00:00Z Serbia, meanwhile, is looking to Rio Tinto to develop a giant mine for jadarite, a newly discovered mineral that contains both boron and lithium, in the west of the country. Britain looks to ancient mines for electric future 2018-04-27T04:00:00Z Monitoring at 51 locations found excessive levels of arsenic, manganese or boron at 41 sites. Minnesota counties against stricter debris disposal rules 2018-03-12T04:00:00Z What is the hybridization on the boron consistent with the shape you have predicted? Chemistry 2019-02-14T00:00:00Z Back in the 1970s, a Montana state board required all the ponds to be “properly sealed” to protect aquifers from chemicals such as boron, selenium and sulfates that leach out of the ash. As Washington state looks for cleaner power, a Montana coal town faces an uncertain future 2018-03-01T05:00:00Z Dr. Post suspects the phosphorescence is the result of interactions between boron and nitrogen impurities in the diamond’s near-flawless carbon frame. Precious Gems Bear Messages From Earth’s Molten Heart 2017-12-11T05:00:00Z For heat resistance in ovenware, they added boron. One of the world’s oldest products faces the digital future 2017-10-12T04:00:00Z The biggest challenge, Sun says, was finding the right piezomagnetic material—he settled on a combination of iron, gallium, and boron—and then producing it at high quality. Mini-antennas could power brain-computer interfaces, medical devices 2017-08-22T04:00:00Z The lightest element, boron, is semiconducting, and its binary compounds tend to be covalent and not ionic. Chemistry 2019-02-14T00:00:00Z The powder samples were ground inside an Ar glovebox under faint red light and mixed with boron nitride as filler to obtain a concentration of 30 mg cm−2 of the product in the absorber. A low-spin Fe(iii) complex with 100-ps ligand-to-metal charge transfer photoluminescence : Nature : Nature Research 2017-03-28T04:00:00Z They predict that boron would be more stable as a 2-atom-wide metallic ribbon than as a single-atom chain, but that stretching the ribbon should switch it to the chain form, which would be a semiconductor. Chemistry: The promise of 1D boron chains : Nature : Nature Research 2017-02-07T05:00:00Z The problem comes as scientists are beginning to glimpse a history of Mars replete with life-friendly, water-rich environments and intriguing chemistry, including the first detection of the element boron. NASA troubleshooting problem with Mars rover drill 2016-12-13T05:00:00Z Zhenguo Huang at the University of Wollongong in Australia and his colleagues used optical microscopes and spectroscopy to study how well films of the insulator boron nitride protect copper from corrosion. Materials science: Atom-thick coats for copper : Nature : Nature Research 2016-11-29T05:00:00Z Write the symbols of the isotopes of boron that are shown as naturally occurring in significant amounts. Chemistry 2019-02-14T00:00:00Z Although there is water here—three groups of pools are fed by springs flowing under the Black Mountains—most species cannot handle the high levels of salt and boron. Death Valley Is Alive 2016-11-06T04:00:00Z But engineers realized the true benefit of 1025 boron steel was its strength, some 30 percent stronger than typical 1025 carbon steel. Mizuno Brings Boron to Strengthen T7's Grooves - Golf Digest 2016-07-30T04:00:00Z Scientists believe boron may have led to the formation of the sugar ribose and ribonucleic acid, or RNA, which is present in all living cells on Earth. NASA troubleshooting problem with Mars rover drill 2016-12-13T05:00:00Z Rather, Ms. Schneider said the product is formulated with vitamin K2, boron and magnesium with a special coating that improves absorption, all of which aim to improve the uptake of calcium in foods. Vitamins Join the ‘Clean Label’ Bandwagon 2016-05-26T04:00:00Z The actual atomic mass of boron can vary from 10.807 to 10.819, depending on whether the mineral source is from Turkey or the United States. Chemistry 2019-02-14T00:00:00Z In the ensuing days, helicopters flew sorties over the reactor, dropping sand to impede the fire and boron to slow the ongoing reaction. The Battles of Chernobyl 2016-04-26T04:00:00Z Irrigating the fields would release salts and toxic elements like selenium and boron — which, trapped in the soil, would eventually turn the ground barren. Farmers Try Political Force to Twist Open California’s Taps 2015-12-30T05:00:00Z The diamond was found in South Africa in January last year and its striking blue colour is attributed to the presence of the element boron within its crystal structure. 'Magical' blue diamond is auctioned for $48m in Geneva - BBC News 2015-11-11T05:00:00Z Blue diamonds are formed when boron is mixed with carbon when the gem is created. A rare blue diamond sells for record $48.5 million at auction 2015-11-11T05:00:00Z In the most common form of boron, the icosahedra pack together in a manner similar to the cubic closest packing of spheres. Chemistry 2019-02-14T00:00:00Z They inserted the control rods—graphite-tipped cylinders of boron carbide that slow or stop a nuclear reaction—too far into the reactor. The Battles of Chernobyl 2016-04-26T04:00:00Z Rather than aluminum, SPA places its structural bets on exotic strains of high-strength boron steel. Volvo XC90 T6 Inscription: A Luxury SUV Worthy of Thor’s Hammer 2015-08-27T04:00:00Z This fuel—a mix of hydrogen and boron—is harder to react, but Tri Alpha researchers say it avoids many of the problems likely to confront conventional fusion power plants. Secretive fusion company makes reactor breakthrough 2015-08-24T04:00:00Z The boron allows for a thinner clubface, as well as a unique hidden slot behind the face that provides additional ballspeed potential. Mizuno's latest MP irons mix traditional looks with contemporary tech: The Loop 2013-10-16T04:00:00Z Elemental boron is chemically inert at room temperature, reacting with only fluorine and oxygen to form boron trifluoride, BF3, and boric oxide, B2O3, respectively. Chemistry 2019-02-14T00:00:00Z His team looked at the ratios of boron isotopes in Permian-age rocks from the United Arab Emirates. Acidic oceans linked to greatest extinction ever 2015-04-08T04:00:00Z Added to that are several thousand tonnes of sand and boron dropped on to the site by emergency workers at the time. Chernobyl: Containing the world's worst nuclear accident 2015-03-18T04:00:00Z The shells of these creatures contained boron, and analyzing this element revealed to the scientists the levels of CO2 in the atmosphere. Earth's Past Climate Reveals Future Global Warming 2015-02-05T05:00:00Z “The boron is giving us a tremendous amount of design flexibility,” says LLewellyn. Mizuno's latest MP irons mix traditional looks with contemporary tech: The Loop 2013-10-16T04:00:00Z At higher temperatures, boron reacts with all nonmetals, except tellurium and the noble gases, and with nearly all metals; it oxidizes to B2O3 when heated with concentrated nitric or sulfuric acid. Chemistry 2019-02-14T00:00:00Z This, says Geim, is what graphene could provide — as could, the team reports, another atomically thin sheet made of boron nitride. Bullet-proof armour and hydrogen sieve add to graphene’s promise 2014-11-26T05:00:00Z To solve the problem, Warner and his team began thinking about what might be different about hydraulic fracturing flowback fluid and found that it contains much higher concentrations of boron and lithium. Where Do Fracking Fluids Go? Scientists Create the First Detector 2014-11-06T05:00:00Z The lab, led by respected scientist Prof Giovanni Canneri, subjected the material to spectrographic analysis and concluded that it contained the elements boron, silicon, calcium and magnesium, and that it was not radioactive. The day UFOs stopped play 2014-10-23T04:00:00Z The materials they chose are layered 2D hexagonal boron nitride or graphene. Caging the Li-ion 2014-09-11T04:00:00Z Further purification of the boron begins with conversion of the impure boron into boron trichloride. Chemistry 2019-02-14T00:00:00Z He and his colleagues proposed ditching D–T fuel in favour of fusing protons with boron-11, a stable isotope that comprises about 80% of natural boron. Plasma physics: The fusion upstarts 2014-07-22T04:00:00Z “When you’re injecting these fluids into the rock formations, you’re breaking apart the shales, and attached to a lot of these shales are boron and lithium,” he says. Where Do Fracking Fluids Go? Scientists Create the First Detector 2014-11-06T05:00:00Z Another study published just last week predicts a stable structure with 36 boron atoms. First boron ‘buckyball’ could be used to store hydrogen : Nature News Blog 2014-07-12T04:00:00Z Geological analysis shows that one billion years ago, the nearby Stornes Peninsula was a shallow inland basin, rich in boron and phosphorus, the key chemical constituents of the rare minerals. Mineral site key to Antarctica's history gets protected status 2014-06-05T04:00:00Z The next step is to heat a mixture of boron trichloride and hydrogen: Chemistry 2019-02-14T00:00:00Z Just one diva on a team can kill the constructive part of the conflict faster than a ton of boron in a nuclear reactor. Down With Divas! (3 Habits Of Highly Ineffective Team Players) 2014-02-24T15:31:00Z The boron nitride grew from inside edge of holes created in the graphene layer. [Report] Heteroepitaxial Growth of Two-Dimensional Hexagonal Boron Nitride Templated by Graphene Edges 2014-01-09T18:56:28.015Z Blackburn could use well water instead, but it contains salts and the mineral boron, which harm almond trees. California water woes hit hard in driest year on record 2013-11-27T13:04:39Z The high levels of boron, which is naturally present in sea water and retained in desalinated water, have been found to reduce tomato and peanut yields in Israel's arid Negev region. Water: The flow of technology 2013-09-25T21:50:42.130Z In the different forms of boron, there are different arrangements and connections between the icosahedra. Chemistry 2019-02-14T00:00:00Z Studying a meteorite from Mars, scientists at the University of Hawaii reported that it contained high levels of boron, a component of borate. Matter: A Far-Flung Possibility for the Origin of Life 2013-09-12T12:00:01Z It is thought that the boron minerals needed to form RNA from pre-biotic soups were not available on early Earth in sufficient quantity, and the molybdenum minerals were not available in the correct chemical form. Earth life 'may have come from Mars' 2013-08-29T00:09:22Z Prof Stellacci said that a market for such materials does not yet exist, and boron nitride's striking clean-up powers may or may not be enough to establish it as a leading contender, even among nanomaterials. 'White graphene' to clean up spills 2013-05-01T06:48:25Z Whatever the plot details, scientifically minded scriptwriters would do well to turn their attention to cubic boron nitride, a material that in many ways resembles diamond. Hard Up: Nanomaterial Rivals Hardness of Diamond 2013-01-17T15:45:00.510Z These nonpolar molecules contain boron with sp2 hybridization and a trigonal planar molecular geometry. Chemistry 2019-02-14T00:00:00Z The newer mechanism relies on rare earth magnets made of an alloy of neodymium iron and boron as well as revolving screw gears to extend a fixator rod that is inserted inside the bone. New Limb-Lengthening Tech May Reduce Complications for Sufferers of Crippling Deformities 2012-12-27T13:15:02.850Z Here in Florence, Prof Benner presented results that suggest minerals containing the elements boron and molybdenum are key in assembling atoms into life-forming molecules. Earth life 'may have come from Mars' 2013-08-29T00:09:22Z For example, in February, the group reported building a transistor by sandwiching boron nitride between two graphene sheets. Britain’s big bet on graphene 2012-08-08T17:20:25.097Z In some respects, such as stability at high temperatures, boron nitride is superior to diamond. Hard Up: Nanomaterial Rivals Hardness of Diamond 2013-01-17T15:45:00.510Z “One would expect something similar for boron,” says Braunschweig. Triple-Bond: Boron Joins Elite Chemical Club 2012-06-15T19:45:05.067Z According to researchers at Rice University, a sponge made of pure carbon nanotubes with a dash of boron has been developed that can absorb up to 100 times its weight in oil. Nanosponge can absorb 100 times its weight in oil 2012-04-17T00:45:00.233Z Pertaining to, or produced from, borax; containing boron; boric; as, boracic acid. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z When a voltage was applied, electrons tunnelled from one graphene sheet to the other, through the boron nitride barrier. Britain’s big bet on graphene 2012-08-08T17:20:25.097Z The researchers fabricated their samples from round nanoparticles of boron nitride in which the atoms of nitrogen and boron form an onionlike structure of nested layers. Hard Up: Nanomaterial Rivals Hardness of Diamond 2013-01-17T15:45:00.510Z However, the process of forming the single bond was slow, and the bromine-stripped boron atoms tended to first react with the surrounding solvent before reacting with each other of each other. Triple-Bond: Boron Joins Elite Chemical Club 2012-06-15T19:45:05.067Z As the tourmaline contains boron there must have been some permeation of vapours from the granite into the sediments. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z He also described the preparation of boron, for which at first he proposed the name boracium, on the impression that it was a metal. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 10 "David, St" to "Demidov" 2012-02-17T03:00:33.923Z This month, writing in the journal American Mineralogist, Dr. Post and his Smithsonian colleagues report the latest scientific tidbit about the Hope Diamond: It contains surprisingly high levels of the element boron. Scientists Examine Hope Diamond for Clues to Its Blue 2012-01-30T23:05:53Z The data in the new study only show how the nano-twinned boron nitride responded to indentation loads with up to seven newtons of force. Hard Up: Nanomaterial Rivals Hardness of Diamond 2013-01-17T15:45:00.510Z As expected, the distance between the boron atoms was shorter in the triple-bonded structure than in the compound with a double bond, matching closely with predicted figures. Triple-Bond: Boron Joins Elite Chemical Club 2012-06-15T19:45:05.067Z They must have contained fluorine, boron and probably also lithium, for topaz, mica and tourmaline, the new minerals of the granite, contain these elements. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z The company has been mixing boron with cooling water in the reactors to prevent accidental chain reactions. Tepco Detects Nuclear Fission at Damaged Fukushima Power Station 2011-11-02T05:51:57Z But to count the boron isotopes precisely would require a much longer experiment — days instead of hours — and that runs into logistical problem of conducting science on famous museum artifacts. Scientists Examine Hope Diamond for Clues to Its Blue 2012-01-30T23:05:53Z If the hardness measures dropped off at higher loads, she says, the true value for the boron nitride samples might be closer to 80 or 85 gigapascals. Hard Up: Nanomaterial Rivals Hardness of Diamond 2013-01-17T15:45:00.510Z The synthetic stones are manufactured in a laboratory in Neuchatel; depending on how much boron has been deposited in the body, the diamonds have a weaker or stronger blue shimmer. Death or Disco? Preserve Your Loved Ones as Their Favorite Vinyl Record 2011-10-19T18:35:00Z They make it clear that there has been an introduction of fluorine and boron and a diminution in the alkalies during the transformation of the granitic rock into the greisen. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z Most tritium produced in nuclear power plants stems from boron used for absorbing neutrons from the plant's chain reaction. Radioactive tritium found in river near Vermont Yankee plant 2011-08-18T18:40:52Z But in parts of the Hope Diamond, boron levels were as high as eight per million atoms; in other parts, there was hardly any. Scientists Examine Hope Diamond for Clues to Its Blue 2012-01-30T23:05:53Z As such, she notes, “it probably would be a breakthrough in the field” if researchers proved that polycrystalline boron nitride boasted hardness values over 100 gigapascals. Hard Up: Nanomaterial Rivals Hardness of Diamond 2013-01-17T15:45:00.510Z For example, in an April article in Nature, "Cleaner, greener fireworks," James Mitchell Crow reported that boron carbide may be a viable, environmentally friendlier replacement for barium-based compounds, used to make green light. What Makes Them Go Boom? Our Favorite Explainers on the Science of Fireworks 2011-06-30T21:15:00.257Z Other British reactors have a system of beads, made from a substance called boron, that can be injected to shut down a reactor in an emergency. Nuclear shutdown system on trial 2011-04-21T07:23:44Z Reactors employing mixed oxide fuel may require extra control rods, made of boron or other neutron-absorbing materials, to slow down more fissile plutonium. Fate of Nuclear Plant in Japan Hangs in the Balance as Melting Continues 2011-03-19T00:15:06.053Z These exfoliated atoms — hundreds of millions of them — were then sorted by weight to reveal how many were boron. Scientists Examine Hope Diamond for Clues to Its Blue 2012-01-30T23:05:53Z "In some systems they've re-racked the fuel assembly making it possible to put more rods in the pond than it was originally designed for, and then you might put extra sheets of boron in between." Surprise 'critical' warning raises nuclear fears 2011-03-16T14:31:32Z But boron is not usually used in boiling water reactors such as those at Fukushima Daiichi because boron is also corrosive on fuel elements. Is Seawater a Last Resort to Cooling Japan's Nuclear Reactors? 2011-03-15T17:45:05.283Z You normally have three safety systems… the control rods, the nitrogen and boron. Nuclear shutdown system on trial 2011-04-21T07:23:44Z Engineers have used secondary generators to pump seawater and boron into the core of the 40-year old boiling water reactor. ‘Worst Case’ Nuclear Disaster in Japan Hangs on Unlikely Events 2011-03-15T13:25:22Z The boron data was intriguing, but ultimately the scientists would like to precisely count two versions of boron, one a slightly heavier isotope with an additional neutron. Scientists Examine Hope Diamond for Clues to Its Blue 2012-01-30T23:05:53Z Nuclear reactors utilize control rods made from elements such as cadmium, boron or hafnium, all of which are efficient neutron absorbers. What Happens During a Nuclear Meltdown? 2011-03-15T14:15:00.257Z What role does the boron in the seawater play? Is Seawater a Last Resort to Cooling Japan's Nuclear Reactors? 2011-03-15T17:45:05.283Z Experts called the injection of seawater and neutron-absorbing boron into the site's three crippled reactors units a desperation move never attempted before in the industry. Will Fukushima Disaster Spell the End for a U.S. Nuclear Revival? 2011-03-14T17:45:06.180Z When the cooling system on the No. 3 reactor also began to fail Sunday, workers pumped seawater and boron into it. Death Toll Estimate in Japan Soars as Relief Efforts Intensify 2011-03-13T15:54:58Z Without power, and with its valves and pumps damaged by the tsunami, authorities resorted to drawing sea water mixed with boron in an attempt to cool the unit's overheated uranium fuel rods. Japan races to avert multiple nuclear meltdowns 2011-03-13T13:48:00Z Sea water and boron is being pumped into the site to lower temperatures. Exodus near Japan nuclear plant 2011-03-12T22:52:44Z Boron can be injected into water coolant systems to control the activity of a reactor core because boron is a strong neutron absorber, especially for thermal neutrons. Is Seawater a Last Resort to Cooling Japan's Nuclear Reactors? 2011-03-15T17:45:05.283Z By heating boron in oxygen, it burnt, and was reconverted into boracic acid. Famous Men of Science 2011-03-08T03:00:49.717Z Instead of being described by a single fuzzy number, the atomic weights of oxygen, hydrogen, lithium, boron, carbon, nitrogen, silicon, sulfur, chlorine and thallium will now be expressed as intervals. Periodic Table Gets Some Flex 2010-12-22T16:35:00Z He said that the success of using sea water and boron to cool the reactor will depend on the volume and rate of their distribution. Japan races to avert multiple nuclear meltdowns 2011-03-13T13:48:00Z Today's commercial solar cells consist of a layer of silicon mixed with boron, which faces the sun, stacked on top of a layer of silicon mixed with phosphorous. Solar energy offers a vast supply of power, but harnessing it is a challenge 2010-06-22T04:00:00Z In cases of emergency, however, boron and seawater can be used to suppress fission chain reactions in the fuel elements. Is Seawater a Last Resort to Cooling Japan's Nuclear Reactors? 2011-03-15T17:45:05.283Z The stones get their colour when the chemical boron is present during formation. 2010-01-11T17:15:00Z Boron trioxide B2O3 is the only known oxide of boron; and may be prepared by heating amorphous boron in oxygen, or better, by strongly igniting boric acid. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" Tibetan mineral deposits have been known since very early times, and formerly the crude material was exported to Europe, under the name of tincal, for the preparation of pure borax and other boron salts. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2 "Bohemia" to "Borgia, Francis" It contains 50.9% of boron trioxide, and is an important source of commercial borates and boracic acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" So the use of seawater and boron is a last-resort effort to cool a reactor? Is Seawater a Last Resort to Cooling Japan's Nuclear Reactors? 2011-03-15T17:45:05.283Z Now and then he looked through the thick glass ports, and he saw the green mist of boron hydride as fuel throbbed slowly into the rocket's tanks. The Scarlet Lake Mystery This mixture burns with a green flame forming boron trioxide; whilst boron is deposited on passing the gas mixture through a hot tube, or on depressing a cold surface in the gas flame. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" In composition it approximates to Cr2O3�H2O, but it always contains more or less boron trioxide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" This has proved to be erroneous; it is non-metallic in character, and its name was altered to silicon, from analogy with carbon and boron. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The difference is that, in this case, the stronger fibers are borazon—boron nitride formed under tremendous pressure—while the softer matrix is composed of tungsten carbide. Thin Edge Horrified, Rick saw a fireman, clumsy in his protective suit, trip and fall before the oncoming flood of flaming boron hydride. The Scarlet Lake Mystery It was isolated by J. Gay Lussac and L. Th�nard in 1808 by heating boron trioxide with potassium, in an iron tube. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" Hastings stipulated only for some member of the triad, carbon, silicon, and boron. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The results of Berzelius were greatly extended by Hermann Kopp, who recognized that carbon, boron and silicon were exceptions to the law. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Certain of the hot-spring waters of the California coast ranges and of Nevada carry considerable quantities of boron, together with ammoniacal salts, and in some places they deposit borax along with sulphur and cinnabar. The Economic Aspect of Geology With an unstable fuel like boron hydride, that made the difference. The Scarlet Lake Mystery So if you do find late-sleeping walnut trees, or walnut trees that are late in starting to grow, you will probably find that is a result of boron deficiency. Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950 Micro: Manganese, copper, boron, silicon, aluminum, fluorine, iodine. Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946 Carbon was joined with silicon, zirconium and titanium, while boron, being trivalent, was relegated to another group. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Recent developments indicate that the metal, boron, may play an important part in the metallurgy of various metals. The Economic Aspect of Geology He could almost picture the stream of boron hydride blending with the oxidizer and flowing in an ever-increasing stream toward the combustion chamber. The Scarlet Lake Mystery You know that a deficiency of boron will cause trees to go into a condition which the growers out there now call "sleepers." Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950 It is now certain that soils are not invariably capable of supplying enough boron, zinc, copper and manganese to maintain healthy growth of plants. Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946 Thus, hydrogen unites with but a single atom of chlorine, zinc with two, boron with three, silicon with four, phosphorus with five and tungsten with six. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The association with minerals containing fluorine and boron, and the intense alteration of the wall rocks, indicate that the temperature must have been very high. The Economic Aspect of Geology Zinc or boron deficiency has a similar effect. Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948 In Oregon on the same soils where we are growing apples, we put on a half a pound of borax per tree to control boron deficiency on apples. Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950 Manganese, boron, zinc, copper, iron, magnesium also lend themselves quite readily for applications as nutritional sprays, when applied as suitable compounds such as the sulphates. Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946 The specific heats of carbon, boron and silicon subsequently formed the subject of elaborate investigations by H.F. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Tourmaline is a complex hydrous silicate of aluminum and boron, with varying amounts of magnesium, iron, and alkalies. The Economic Aspect of Geology Their outstanding development was in the field Of boron deficiency in walnuts. Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948 We have to have a boron content in walnuts very, very much higher than that of apples. Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950 In fact, diny teeth, being organic, seemed to be an especially hard form of boron carbide. Attention Saint Patrick It is possible that this lack of viability may be due to some soil deficiency such as insufficient lime or boron. Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting Guelph, Ontario, September 3, 4, 5, 1947 This is found in nature in considerable quantities and forms one of the chief sources of boron compounds. An Elementary Study of Chemistry The presence of "snake heads" or sprouts in summer walnut growth and "die-back" or winter kill noticeable in some walnut trees during the winter months are now generally recognized as signs of boron deficiency. Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948 "Well, couldn't we drive boron rods into the mass and slow down the reaction?" asked Tom. Stand by for Mars! Consequently, the increase in weight, after ignition, upon that of the lime taken gives the amount of boron trioxide present. A Text-book of Assaying: For the Use of Those Connected with Mines. On some of the Oregon soils an application of boron in the form of ordinary borax under the trees in the spring has greatly helped in getting a crop of nuts. Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting Guelph, Ontario, September 3, 4, 5, 1947 The properties of this important compound have been discussed under the head of boron. An Elementary Study of Chemistry The element most frequently deficient is nitrogen, but sometimes boron, copper, or iron is lacking; or the elements are not in balance, because of the excess of some, or the lack of others. Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948 Among experiments with processes of the second class, based upon the formation of nitrides and their subsequent decomposition, the nitrides of boron and titanium had received most attention from inventors. Scientific American Supplement, No. 717, September 28, 1889 The increase in weight gives the boron trioxide. A Text-book of Assaying: For the Use of Those Connected with Mines. It has been reported from British Columbia that some die-back is due to deficiency of boron. Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting Guelph, Ontario, September 3, 4, 5, 1947 Each of the three elements, silicon, titanium, and boron, belongs to a separate periodic family, but they occur near together in the periodic grouping and are very similar in both physical and chemical properties. An Elementary Study of Chemistry One part of boron fluoride BF3 instantly converts 160 parts of terebenthene into polymers boiling above 300� C., and optically inactive. Scientific American Supplement, No. 711, August 17, 1889 Experiments already made so that aluminum, silicon, boron, manganese, magnesium, sodium and potassium can be reduced from their oxides with ease. Scientific American Supplement, No. 508, September 26, 1885 Before the introduction of Gooch's process it was usual to determine the boron trioxide "by difference." A Text-book of Assaying: For the Use of Those Connected with Mines. Deville's adamantine boron burns in the same manner, but with more difficulty, becoming fluoride or boron. Scientific American Supplement, No. 561, October 2, 1886 Many other complex acids of boron are known. An Elementary Study of Chemistry The disintegration of boron is very simple: the funnels are set free and assume the spherical form, showing a central "cigar" and four globes each containing two triplets. Occult Chemistry Clairvoyant Observations on the Chemical Elements A boron bronze may be prepared by the reduction of boracic acid in contact with copper. Scientific American Supplement, No. 508, September 26, 1885 The distillate contains the boron as boric acid. A Text-book of Assaying: For the Use of Those Connected with Mines. Thus one atom of hydrogen combines with eighty of bromine, one hundred and sixty of mercury, two hundred and forty of boron, three hundred and twenty of silicon, etc. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work Beryllium, following lithium, is less strongly base-forming, while boron has some base-forming and some acid-forming properties. An Elementary Study of Chemistry The ovoids and "cigars," set free on the meta level, behave as in boron. Occult Chemistry Clairvoyant Observations on the Chemical Elements The element boron seems to have almost as marked an effect upon copper as carbon does upon iron. Scientific American Supplement, No. 508, September 26, 1885 There is only one series of boron compounds which have any importance. A Text-book of Assaying: For the Use of Those Connected with Mines. Chlorine, iodine, bromine, and fluorine thus formed a very distinct group; sulphur and selenium another; boron and silicon another; potassium, sodium, and lithium another; and so on. The Advance of Science in the Last Half-Century In carbon all base-forming properties have disappeared, and the acid-forming properties are more marked than in boron. An Elementary Study of Chemistry The second ring has a quartet instead of the sextet, but otherwise breaks up as does that of the left; the quintet at the base follows that of boron. Occult Chemistry Clairvoyant Observations on the Chemical Elements The reaction may, however, be moderated by employing solutions of phosphorus and boron iodide in dry carbon bisulphide. Scientific American Supplement, No. 841, February 13, 1892 Boron.—The amorphous variety of boron inflames instantly in fluorine, with projection of brilliant sparks and liberation of dense fumes of boron trifluoride, BF3. Scientific American Supplement, No. 832, December 12, 1891 There are some, such as carbon, phosphorus, nitrogen, silicon, boron, alumium, the right of which to the title of ion it is desirable to decide as soon as possible. Experimental Researches in Electricity, Volume 1 H. N. WARREN, research analyst.—Interesting decomposition of cast iron with production of boron and silicon; experiments with other metals. Scientific American Supplement, No. 586, March 26, 1887 It will be observed that this balloon appears in every member of these two groups, except boron. Occult Chemistry Clairvoyant Observations on the Chemical Elements Nature gives the following: Hitherto only one compound of boron with sulphur has been known to us, the trisulphide, B2S3, and concerning even that our information has been of the most incomplete description. Scientific American Supplement, No. 841, February 13, 1892 The chlorides of both boron and silicon are decomposed by fluorine, with formation of fluorides and liberation of chlorine, the reaction being accompanied by the production of flame. Scientific American Supplement, No. 832, December 12, 1891 Antimony, arsenic, bismuth, boron, nitrogen, cæsium, gold, indium, mercury, phosphorus, rubidium, selenium, sulphur, thallium, praseodymium. Scientific American Supplement, No. 799, April 25, 1891 A great variety of methods for coating incandescent lamp filaments with silicon, titanium, chromium, osmium, boron, etc. Edison, His Life and Inventions The central globe repeats that of boron, with an additional four-atomed sphere in the middle. Occult Chemistry Clairvoyant Observations on the Chemical Elements Subsequently a method of obtaining boron sulphide was proposed by Fremy, according to which a mixture of boron trioxide, soot, and oil is heated in a stream of the vapor of carbon bisulphide. Scientific American Supplement, No. 841, February 13, 1892 Boron nitride behaves in an exceedingly beautiful manner, being attacked in the cold, and emitting a brilliant blue light which is surrounded by a halo of the fumes of boron fluoride. Scientific American Supplement, No. 832, December 12, 1891 On the whole the balance of evidence seems to be that while no acute injury is likely to result from boron compounds in food, they are liable to produce slighter digestive interferences. The Project Gutenberg Encyclopedia Volume 1 of 28 The elements plants build with include calcium, magnesium, potassium, phosphorus, sodium, sulfur, iron, zinc, cobalt, boron, manganese, molybdenum, carbon, nitrogen, oxygen, and hydrogen. Organic Gardener's Composting It has, however, an intense affinity for boron, and will even go through a carbon crucible to unite with it. An Introduction to Chemical Science Red phosphorus also reacts with incandescence when heated in the vapor of boron iodide. Scientific American Supplement, No. 841, February 13, 1892 These chemists prepared it by allowing dry sulphureted hydrogen gas to stream over amorphous boron heated to redness. Scientific American Supplement, No. 841, February 13, 1892 The reaction between boron and sulphureted hydrogen only commences at red heat, near the temperature of the softening of glass. Scientific American Supplement, No. 841, February 13, 1892 Heated in contact with sulphureted hydrogen, it forms sulphides of boron and phosphorus and hydriodic acid, without liberation of iodine. Scientific American Supplement, No. 841, February 13, 1892 Berzelius obtained this substance in an impure form by heating boron in sulphur vapor, but the first practical mode of its preparation in a state of tolerable purity was that employed by Wohler and Deville. Scientific American Supplement, No. 841, February 13, 1892 When thrown into vapor of mercury, boron phospho-di-iodide instantly takes fire. Scientific American Supplement, No. 841, February 13, 1892 On examining the porcelain boat in which the boron had been placed, a non-volatile black substance is found, which appears to consist of a lower sulphide of the composition B4S. Scientific American Supplement, No. 841, February 13, 1892 It burns spontaneously in chlorine, forming boron chloride, chloride of iodine, and pentachloride of phosphorus. Scientific American Supplement, No. 841, February 13, 1892 By the continued action of dry hydrogen upon the heated compound the iodine and a portion of the phosphorus are removed, and a new phosphide of boron, of the composition B5P3, is obtained.—Nature. Scientific American Supplement, No. 841, February 13, 1892 |
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