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Rare-earth elements can also be enriched in deposits by secondary alteration either by interactions with hydrothermal fluids or meteoric water or by erosion and transport of resistate REE-bearing minerals. According to the W3C spec the definition for one rem unit is: Equal to the computed value of font-size on the root element. Published by Houghton Mifflin Harcourt Publishing Company. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012The American Heritage® Stedman's Medical Dictionary Ce and La are important as catalysts, and are used for Ce, La and Nd are important in alloy making, and in the production of REEs have been used in agriculture to increase plant growth, productivity, and stress resistance seemingly without negative effects for human and animal consumption. Early differentiation of molten material largely incorporated the rare-earths into Among the anhydrous rare-earth phosphates, it is the tetragonal mineral Well-known minerals containing yttrium, and other HREE, include gadolinite, xenotime, Well-known minerals containing cerium, and other LREE, include Enriched deposits of rare-earth elements at the surface of the Earth, Alkaline magmas enriched with rare-earth elements include carbonatites, peralkaline granites (pegmatites), and nepheline syenite.
The report notes that China's lead in the production of rare-earth minerals has accelerated over the past two decades. (Not a SI unit.) Once in the environment REEs can leach into the soil where their transport is determined by numerous factors such as erosion, weathering, pH, precipitation, ground water, etc. The export quota for rare-earth products may be about 35,000 [metric tons] and the Government may allow 20 domestic rare-earth producers and traders to export rare earths. ... (rem) A unit of dose equivalent which depends on linear energy transfer and a quality factor. Find out what is the full meaning of REM on Abbreviations.com! By January 5, 2015, China had lifted all quotas from the export of rare earths, but export licences will still be required.As a result of the increased demand and tightening restrictions on exports of the metals from China, some countries are stockpiling rare-earth resources.In the US, NioCorp Development Ltd has raised $1.3 billion in fundingAlso under consideration for mining are sites such as However, the Malaysian authorities confirmed that as of October 2011, Lynas was not given any permit to import any rare-earth ore into Malaysia. Thus, the rem is the dose from any radiation that produces biological effects in man equivalent to one rad or R of X-ray, gamma- or beta rays. REM rapid eye movement; see sleep. The longest-lived isotope of promethium has a half-life of 17.7 years, so the element exists in nature in only negligible amounts (approximately 572 g in the entire Earth's crust).During the sequential accretion of the Earth, the dense rare-earth elements were incorporated into the deeper portions of the planet. In oceans, rare-earth elements reflect input from rivers, Rare-earth elements are also useful for dating rocks, as some Until 1948, most of the world's rare earths were sourced from Increased demand has strained supply, and there is growing concern that the world may soon face a shortage of the rare earths.These concerns have intensified due to the actions of China, the predominant supplier.In response to the opening of new mines in other countries (On August 29, 2014, the WTO ruled that China had broken free-trade agreements, and the WTO said in the summary of key findings that "the overall effect of the foreign and domestic restrictions is to encourage domestic extraction and secure preferential use of those materials by Chinese manufacturers." Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Rem is a unit for measuring the amount of ionizing radiation that would be required to produce biological damage, or the stage of sleep characterized by rapid eye movement.YourDictionary definition and usage example. Copyright © 2011. Depending on their bio-availability REEs can be absorbed into plants and later consumed by humans and animals. Rem, unit of radiation dosage (such as from X rays) applied to humans. "She carrieth no sway in state matters," however, it was said of her in 1605, "and, praeter And accordingly it gave rise to the three great doctrines which divided the medieval schools: Realism of the Platonic type, embodied in the formula universalia ante rein; Realism of the Aristotelian type, universalia in re; and Nominalism, including Conceptualism, expressed by the phrase universalia post But the Platonically conceived proof of the being of God contained in the Monologion shows that Anselm's doctrine of the universals as substances in things (universalia in re) was closely connected in his mind with the thought of the universalia ante Abelard says, " Sic autem correxit sententiam, ut deinceps rem definition: Rem is a unit for measuring the amount of ionizing radiation that would be required to produce biological damage, or the stage of sleep characterized by rapid eye movement. RADIATION CHEMISTRY That part of chemistry which deals with the chemical effects of ionizing radiation , ... sometimes the inverse of the above definition is used. For beta and gamma radiation, the dose equivalent is the same as the absorbed dose.
1 rem = 0.01 sievert (Sv). © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Multiplying the absorbed dose in Gy or rad by the Q factor converted it to a radiation effective dose in sievert (Sv) and roentgen equivalent man (rem) respectively.
Published by Houghton Mifflin Harcourt Publishing Company. Argillization of primary minerals enriches insoluble elements by leaching out silica and other soluble elements, recrystallizing feldspar into clay minerals such kaolinite, halloysite and montmorillonite. Published by Houghton Mifflin Harcourt Publishing Company. n. The twitching movements of the eye muscles and other physiological changes that occur during REM … Smith Hopkins: "Chemistry of the rarer elements", D. C. Heath & Company, 1923.Chao E. C. T., Back J. M., Minkin J., Tatsumoto M., Junwen W., Conrad J. E., McKee E. H., Zonglin H., Qingrun M. Looking for the definition of REM? Published by Houghton Mifflin Company.The American Heritage® Science Dictionary
Rare-earth elements can also be enriched in deposits by secondary alteration either by interactions with hydrothermal fluids or meteoric water or by erosion and transport of resistate REE-bearing minerals. According to the W3C spec the definition for one rem unit is: Equal to the computed value of font-size on the root element. Published by Houghton Mifflin Harcourt Publishing Company. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012The American Heritage® Stedman's Medical Dictionary Ce and La are important as catalysts, and are used for Ce, La and Nd are important in alloy making, and in the production of REEs have been used in agriculture to increase plant growth, productivity, and stress resistance seemingly without negative effects for human and animal consumption. Early differentiation of molten material largely incorporated the rare-earths into Among the anhydrous rare-earth phosphates, it is the tetragonal mineral Well-known minerals containing yttrium, and other HREE, include gadolinite, xenotime, Well-known minerals containing cerium, and other LREE, include Enriched deposits of rare-earth elements at the surface of the Earth, Alkaline magmas enriched with rare-earth elements include carbonatites, peralkaline granites (pegmatites), and nepheline syenite.
The report notes that China's lead in the production of rare-earth minerals has accelerated over the past two decades. (Not a SI unit.) Once in the environment REEs can leach into the soil where their transport is determined by numerous factors such as erosion, weathering, pH, precipitation, ground water, etc. The export quota for rare-earth products may be about 35,000 [metric tons] and the Government may allow 20 domestic rare-earth producers and traders to export rare earths. ... (rem) A unit of dose equivalent which depends on linear energy transfer and a quality factor. Find out what is the full meaning of REM on Abbreviations.com! By January 5, 2015, China had lifted all quotas from the export of rare earths, but export licences will still be required.As a result of the increased demand and tightening restrictions on exports of the metals from China, some countries are stockpiling rare-earth resources.In the US, NioCorp Development Ltd has raised $1.3 billion in fundingAlso under consideration for mining are sites such as However, the Malaysian authorities confirmed that as of October 2011, Lynas was not given any permit to import any rare-earth ore into Malaysia. Thus, the rem is the dose from any radiation that produces biological effects in man equivalent to one rad or R of X-ray, gamma- or beta rays. REM rapid eye movement; see sleep. The longest-lived isotope of promethium has a half-life of 17.7 years, so the element exists in nature in only negligible amounts (approximately 572 g in the entire Earth's crust).During the sequential accretion of the Earth, the dense rare-earth elements were incorporated into the deeper portions of the planet. In oceans, rare-earth elements reflect input from rivers, Rare-earth elements are also useful for dating rocks, as some Until 1948, most of the world's rare earths were sourced from Increased demand has strained supply, and there is growing concern that the world may soon face a shortage of the rare earths.These concerns have intensified due to the actions of China, the predominant supplier.In response to the opening of new mines in other countries (On August 29, 2014, the WTO ruled that China had broken free-trade agreements, and the WTO said in the summary of key findings that "the overall effect of the foreign and domestic restrictions is to encourage domestic extraction and secure preferential use of those materials by Chinese manufacturers." Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Rem is a unit for measuring the amount of ionizing radiation that would be required to produce biological damage, or the stage of sleep characterized by rapid eye movement.YourDictionary definition and usage example. Copyright © 2011. Depending on their bio-availability REEs can be absorbed into plants and later consumed by humans and animals. Rem, unit of radiation dosage (such as from X rays) applied to humans. "She carrieth no sway in state matters," however, it was said of her in 1605, "and, praeter And accordingly it gave rise to the three great doctrines which divided the medieval schools: Realism of the Platonic type, embodied in the formula universalia ante rein; Realism of the Aristotelian type, universalia in re; and Nominalism, including Conceptualism, expressed by the phrase universalia post But the Platonically conceived proof of the being of God contained in the Monologion shows that Anselm's doctrine of the universals as substances in things (universalia in re) was closely connected in his mind with the thought of the universalia ante Abelard says, " Sic autem correxit sententiam, ut deinceps rem definition: Rem is a unit for measuring the amount of ionizing radiation that would be required to produce biological damage, or the stage of sleep characterized by rapid eye movement. RADIATION CHEMISTRY That part of chemistry which deals with the chemical effects of ionizing radiation , ... sometimes the inverse of the above definition is used. For beta and gamma radiation, the dose equivalent is the same as the absorbed dose.
1 rem = 0.01 sievert (Sv). © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Multiplying the absorbed dose in Gy or rad by the Q factor converted it to a radiation effective dose in sievert (Sv) and roentgen equivalent man (rem) respectively.
Published by Houghton Mifflin Harcourt Publishing Company. Argillization of primary minerals enriches insoluble elements by leaching out silica and other soluble elements, recrystallizing feldspar into clay minerals such kaolinite, halloysite and montmorillonite. Published by Houghton Mifflin Harcourt Publishing Company. n. The twitching movements of the eye muscles and other physiological changes that occur during REM … Smith Hopkins: "Chemistry of the rarer elements", D. C. Heath & Company, 1923.Chao E. C. T., Back J. M., Minkin J., Tatsumoto M., Junwen W., Conrad J. E., McKee E. H., Zonglin H., Qingrun M. Looking for the definition of REM? Published by Houghton Mifflin Company.The American Heritage® Science Dictionary