It contains soil types, such as podzols, chernozems, brown earths, chestnut soils, etc., familiar to many people. |
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Foxes, chased to exhaustion and death, are often dug out of their earths and feel great pain. |
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Many of these cavities contain good crystals of potassium, strontium, barium, rare earths, titanium, and niobium minerals. |
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The palette for fresco painting is traditionally restricted to earths, lime white, carbon black, ultramarine, and glass. |
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Like those of the Group 1 metals, the oxides of the alkaline earths can be dissolved in water to form bases. |
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Four important chemical family names of elements still widely used are the alkali metals, the alkaline earths, the halogens, and the noble gases. |
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Foxhunters block up earths and badger setts the night before the hunt to ensure that foxes are forced to run until exhausted. |
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Where earths have been stopped they are required by the rules to be opened up again at the end of the day's hunting. |
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The night before the hunt, foxhunters cover up any earths and badger setts to make sure that the foxes have to run until exhausted. |
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Some hunts even constructed artificial earths within their coverts to further encourage the fox population. |
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Ancient and primitive tribes used these plants, often combined with different earths, to colour and decorate their faces and bodies. |
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The rare earths once had a valuable function in gas mantles and lighter flints. |
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The largest single deposit of rare earths is the bastnaesite deposit at Mountain Pass, San Bernnadino County in California. |
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Most of the other rare earths are fairly transparent to thermal neutrons with cross sections ranging from 0.7 barn for cerium to 170 for erbium. |
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Allanite, fluorite, perovskite, sphene, and zircon have the potential to be future sources of rare earths. |
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Around 3000 b.c., the Sumerians found that they could obtain copper from certain earths, or ores, by heating the earths with a source of carbon such as straw. |
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Indeed The International Fund for Animal Welfare has frequently uncovered hunts around the country that use artificial earths and food trails to entice foxes on to their land. |
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The earths magnetic field exerts a force on the compass needle causing it to rotate until it aligns with the magnetic field. |
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One of the rarest of the rare earths, lutetium occurs in rare-earth minerals such as laterite clays, xenotime, and euxenite. |
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Other minerals that have been used as a source of rare earths are apatite, euxenite, gadolinite, and xenotime. |
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Minerals of rare earths present in this prospect are monazite and fluorapatite, thin veins of fluocarbonate in calcite and dolomite deposits. |
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It also contains coal, iron, uranium, gold, copper, rare earths, gemstones and much more, including, of course, fish. |
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Several years ago, for example, China suddenly slashed exports of rare earths. |
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Inner Mongolia's backward economy was booming thanks to demand for its minerals, ranging from copper to rare earths, but especially its coal. |
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These changes are bringing with them hitherto unanticipated impacts to human society and to the earths ecosystems. |
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Rhodia is active in the separation, purification and formulation of these rare earths. |
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In other places, closer to the ice, the earths crust rebounded when the weight of the ice was removed, so that sea level dropped for a while. |
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The geologic time scale divides the 4.6 billion years of earths history into hierarchy of time periods. |
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There is archeological evidence that iron earths were collected and transported more than three hundred thousand years ago. |
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Many hunts take steps the night before, or early on the day of the hunt, to block up the entrances to earths, badger setts and artificial places such as drains. |
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The chemical, metallurgical, and physical behaviours of the rare earths are governed by the electron configuration of these elements. |
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Acidic, leached podzol soils and brown earths predominate throughout Wales. |
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The ytterbium-doped core ensures amplification around 1.06 µm, but other rare earths are also considered. |
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Very strong magnets can be produced from alloys of rare earths such as samarium cobalt or neodymium iron boron. |
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Hydrogeology involves the study of water beneath the earths surface, in particular groundwater. |
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The answers to these questions must cause us to reflect on the imbalance of the distribution of the earths goods and to ask what we can do to rectify matters, even in the smallest way. |
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Unlike badgers, which fastidiously clean their earths and defecate in latrines, red foxes habitually leave pieces of prey around their dens. |
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Dutches did not put the problem only to open the new earths. |
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Uncle Dave had drawn me into the history of incandescence, of the rare earths and metallic filaments that glowed and incandesced brilliantly when heated. |
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Identification of multiple rare earths and associated elements in raw monazite sands by laser-induced breakdown spectroscopy. |
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This paper reports the hydrolysis of urea and its hydrolysis products in a soil to which rare earths were added as chloride. |
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It suspended exports of rare earths to Japan in 2010, driving up prices thirtyfold by last summer and sending shivers through industries across the globe that are dependent on the strategic minerals. |
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Europium metal, which has a bcc structure, oxidizes the most rapidly of any of the rare earths with moist air and needs to be handled at all times in an inert gas atmosphere. |
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Gypsum is present in many of the desert loams and arid red earths. |
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Because of its high concentrations of yttrium and heavy lanthanides, xenotime is used as a source material for the individual rare-earth elements rather than being used as a mixture of heavy rare earths. |
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The Chinese experimented with printing at least as early as ad 500, with inks from plant substances mixed with coloured earths and soot or lampblack. |
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Only traditional pigments like woad, charcoal, copper carbonate and different iron oxide-rich earths, were used to produce all the different shades and colours. |
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With the exception of laterite clays, these minerals are good sources of light lanthanides and lanthanum and account for about 95 percent of the rare earths in use. |
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To safeguard its dwindling surpluses, the Chinese government has been stockpiling rare earths, taxing them and imposing ever-smaller export quotas. |
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If health conditions were further improved in India to the point where they equalled those in Canada, and population increase kept on at the same rate, within a century there would be enough Indians to populate five earths. |
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One kilogram exerts a downward fore of roughly 10N at the earths surface. |
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Under the new guidelines, rare earths will require an export licence but the amount that can be sold abroad will no longer be covered by a quota. |
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Of all the elements in the periodic table, the rare earths have the oddest names. |
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Carbonates occur in different forms such as hardpans, nodular or pisolitic layers, mottled carbonate-rich layers, and calcareous fine earths. |
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Magnetic Materials Association, a trade association representing high performance magnet producers and suppliers, also briefed members of Congress on rare earths. |
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Rare earths are used as catalysts, phosphors, and polishing compounds. |
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During the first half of 1808, Davy conducted a series of further electrolysis experiments on alkaline earths including lime, magnesia, strontites and barytes. |
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The rare earths mineralisation has been encountered within the Geolsec formation and within surrounding rocks of Coomalie Dolostone and Whites Formation. |
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Demand for the magnets, made of such rare earths as neodymium and dysprosium, is expected to grow due to rising sales of hybrid and other eco-friendly cars. |
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The work of Moissan on the metallic carbids and silicids has now been carried out, in conjunction with P. Williams, on the borids of the alkaline earths. |
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Curious about the composition of seemingly indecomposable compounds, such as alkalis and earths, Davy struck these elements with strong electromagnetic currents. |
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Comparatively, China abounds in rare metal resources and enjoys absolute advantages in the reserves of tungsten, tin, stibium, rare earths, molybdenum, indium, and titanium. |
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This results in those rare earths with lower atomic numbers and atomic weights actually having larger atoms than elements that are higher in the periodic table. |
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