Looking for online definition of Rare earth metals in the Medical Dictionary? Rare earth metals explanation free. What is Rare earth metals? Meaning of Rare earth metals medical term. What does Rare earth metals mean?
Looking for online definition of rare earth element in the Medical Dictionary? rare earth element explanation free. What is rare earth element? Meaning of rare earth element medical term. What does rare earth element mean?
TY - JOUR. T1 - Unprecedentedly fast hydrolysis of the RNA dinucleoside monophosphates ApA and UpU by rare earth metal ions. AU - Komiyama, Makoto. AU - Matsumura, Kazunari. AU - Matsumoto, Yoichi. PY - 1992. Y1 - 1992. N2 - Rare earth metal(III) ions rapidly hydrolyse adenylyl(3′-5′) adenosine and uridyl(3′-5′)uridine at pH 8,30°C; the half-life of the former is 10 min with 0.01 mol dm-3 TmIII.. AB - Rare earth metal(III) ions rapidly hydrolyse adenylyl(3′-5′) adenosine and uridyl(3′-5′)uridine at pH 8,30°C; the half-life of the former is 10 min with 0.01 mol dm-3 TmIII.. UR - http://www.scopus.com/inward/record.url?scp=37049075459&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=37049075459&partnerID=8YFLogxK. U2 - 10.1039/C39920000640. DO - 10.1039/C39920000640. M3 - Article. AN - SCOPUS:37049075459. SP - 640. EP - 641. JO - Chemical Communications. JF - Chemical Communications. SN - 1359-7345. IS - 8. ER - ...
Canada Rare Earth Enters Into Agreement to Purchase a Rare Earth Separation Refinery Situated in Laos. May 9, 2016. Canada Rare Earth Corporation ("Canada Rare Earth" or the "Company") (TSX.V: LL) is pleased to announce that it has entered into an agreement (the "Agreement") to purchase 60% of the issued and outstanding shares (the "Shares") of a company based in Laos ("LaosCo"). LaosCo owns a full capability rare earth refinery (the "Refinery") that is designed to process monazite rare earth concentrate and separate the concentrate into the entire spectrum of commercially traded rare earths including light and heavy elements. LaosCos future development plans entail extending capabilities to include rare earth metal making.. The configuration of the Refinery is based on years of design, construction and operating experience in separating rare earth concentrates into individual rare earth oxides to at least 99.99% purity. The engineering team that designed and built the Refinery has built 10 ...
Increasing permanent magnets demand is anticipated to augment global rare earth elements market growth over the next five years. Rare earth elements are also known as rare earth metals and belongs to a group of seventeen elements which comprise similar properties. The group consists of fifteen lanthanide series elements and yttrium and scandium. Major elements include lanthanum, praseodymium, cerium and Neodymium. These elements together constituted total rare earth elements market accounting for over 74% in 2013. The elements have major applications in technology products such as TVs, computers & tablets, nuclear batteries, super conductors, miniature, laser repeaters, military technology, various medical devices, permanent magnets and rechargeable batteries.. These are also applied as catalysts in petroleum refining and automotive industries and as pigments in ceramic and glass. Mostly Neodymium is used in permanent magnet manufacturing process. Growing applications of permanent magnets in ...
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All of this leaves us with two interesting questions. The first question is why would organisms evolve to need these elements that are in such low concentrations in seawater? We can only speculate on the answer, but there are probably several important factors. First of all, rare earth element ions have some chemical similarity to the calcium ions which are more commonly found in enzymes such as MDH. Additionally, the rare earths actually possess some chemical properties that make them potentially better catalysts than calcium. Methanotrophy is thought to be one of the oldest metabolic pathways. So, it may well be that methanotrophy first evolved in an environment more rich in rare earths than todays ocean. Indeed, the hydrothermal systems at Solfotara have dissolved rare earth element concentrations 40,000 times higher than seawater at the Deepwater Horizon site and hydrothermal systems are often observed to have significant dissolved methane. So the enzymatic rare earth element requirement ...
Growing applications of rare earth elements as a metal catalyst is projected to drive the market growth over the forecast period. Majorly lanthanum and cerium are used as catalyst in petroleum refining and metallurgical process. Increasing petroleum and metals demand is anticipated to surge the market growth over the next five years. Scarcity of these metals and depletion of existing reserves is expected to hamper the global rare earth metals market growth. The expected depletion of the metals includes dysprosium and neodymium owing to increasing consumption worldwide. China was the largest producer of neodymium in 2012 accounting for over 93% of global production. Environmental regulatory bodies in many nations such as China have banned excessive mining to restrict resources exploitation. This is projected to have negative impact on rare earth elements market over the next five years. ...
Back in 1787, a Swedish lieutenant Carl Axel Arrhenius, who was an enthusiast of minerals, picked up a black rock of a kind he had not seen before from Ytterby pegmatite quarry. In the first publication by Geijer (1788) describing this finding he wrote that the properties of the rock were "black, asphalt- or coal-like colour, high density of 4.223, lack of magnetism…". The only initial conclusion was that the specimen might contain tungsten. A more detailed study was done by Johan Gadolin and he could identify a new metal called yttrium (still in impure form) from this black mineral that was called ytterbite by Arrhenius and later gadolinite after Gadolin. Isolating the rest of the individual rare earth metals from the mineral was a difficult task and it took until 1907 when the last rare earth elements were identified in the same black gadolinite mineral; eight rare earth elements were first purified from Ytterby gadolinite. ...
Rare Earth Elements are essential for advanced technologies from smartphones and robots to national defense systems. The rare earth metals have remarkable chemical properties but are so evenly dispersed throughout the earths crust that economically attractive concentrations are extremely rare. As a result, the U.S. imports nearly all its rare earth elements from China.
To help increase the U.S. supply of rare earth metals, a Lawrence Livermore National Laboratory (LLNL) team has created a new way to recover rare earths using bioengineered bacteria.
Canada Rare Earth Completes the Purchase and Sale of 90 Metric Tons of Concentrate and is on Schedule for Completion of an additional 380 Metric Tons in June 2017. May 17, 2017. Vancouver, BC - Canada Rare Earth Corp. (TSX.V: LL) ("Canada Rare Earth" or the "Company") is pleased to announce continuing and increasing momentum in its rare earth concentrate trading business. Tracy A. Moore, Chief Executive Officer of Canada Rare Earth explained, "We are extremely pleased with the acceleration of our rare earth concentrate trading business. We have now completed the purchase and sale of 301 metric tons ("MTs") of concentrate with increasing momentum: 6 MTs in the December 31, 2016 quarter; 25 MTs in the March 31, 2017 quarter; and so far 270 MTs in the quarter to end June 30, 2017.". The Company yesterday completed the purchase and sale of 90 MTs that are related to but separate from the purchase and sale of 180 MTs that alone generated proceeds of $386,000 as announced on May 2, 2017.. A further ...
Chinas Deng Xiaoping - pictured when a student in France, nice suit - was once quoted as saying: "The Middle East has oil, China has rare earths". These rare earth elements have become increasingly important since the days of the late Chinese leader - to the point where scientists say they are now virtually indispensable. The scarce elements are vital for all kinds of technologies, and especially in the world of IT. International concern has been growing over the monopoly held in this area by China, which produces well over 90 percent of the worlds supply of rare earth elements, and its tightening of export quotas.. Japan is one of the worlds biggest importers of rare earths and is very keen to reduce its dependency on China. Reports today said Tokyo had come up with a raft of new measures to do just that. According to Nikkei.net, the Japanese government has unveiled a range of ways to help firms secure a stable supply of rare earth metals.. Those listed included helping speed up the ...
Professor George Hadjipanayis. Source: University of Delaware. Researchers at the University of Delaware and at General Electric Global Research are independently developing new magnets using nanoparticles to preserve the increasingly small supply of rare earth metals typically used in the ... ...
Chinas influence over the global rare earth metals (REM) markets has come under increased international scrutiny following recent measures by the Chinese Government aimed at strengthening control over its fragmented REM industry. China currently accounts for 36 percent of REM reserves and 97 percent of worldwide production. These metals, comprised...
... MARINO GERGORIĆ Industrial Materials Recycling Department of Chemistry and Chemical Engineering Chalmers University of Technology ABSTRACT Rare earth elements (REEs) have become vital components in a wide range of industrial applications. The demand for the REEs has grown significantly in the last few decades. This has led to increasing costs and supply chain risk. Today, despite lower prices than in 2011, they are classified as the highest supply risk elements in the EU; thus new incentives for recycling the REEs out of electronic scrap were brought forth. End-of-life neodymium magnets are a viable source for the recovery of some REEs. Although mainly iron alloys, these materials contain neodymium, dysprosium and small admixtures of praseodymium and terbium. Leaching followed by solvent extraction of the REEs out of the leachate is an attractive and efficient way of recycling these elements out of end-of
There are 17 rare earth elements (REEs). They have names like lanthanum, europium and yttrium. And theyre critical to a variety of high-tech products and manufacturing processes, including catalytic converters, petroleum refining, color TV and flat panel displays, permanent magnets, batteries for hybrid and electric vehicles, medical devices, and various defense systems like missiles, jet engines, and satellite components. About 124,000 metric tons of REEs were produced in 2009, with worldwide demand during this period estimated to be 134,000 metric tons - the difference have been made up from existing stockpiles. By 2012, worldwide demand is expected to reach 180,000 metric tons while mining operations are not expected to keep up with demand in the near term. This situation is explored in a report published by the Congressional Research Service in late July and recently posted to the Federation of American Scientists Secrecy News Web site.. [My note: There are 17 rare earth elements (REEs), ...
Last September, a potential shortage of rare earth materials made news when China withheld shipments to Japan after a maritime incident occurred near a disputed island chain in the East China Sea. China holds a monopoly on the production of rare earth minerals, and Japan is the largest customer, converting the materials into ultra strong rare earth magnets. Tensions eased several months later when shipments resumed, but this event raised public awareness about the vulnerability caused by potential shortages or international disputes.. So has the crisis been resolved? No, not at all. So what are rare earths, and why is this a big deal?. Rare earth metals include 15 rather obscure elements in the periodic table (called the lanthanides) plus two others with similar properties (scandium and yttrium). They are often overlooked, as their names are difficult to pronounce, but these metals and their oxides have very special and useful optical and magnetic properties.. Rare earths are like "vitamins" in ...
Experimental results from several studies exploring the impact of pH and acid volume on the stripping of rare earth elements (REEs) loaded onto ligand-based media via an active column. The REEs in this experiment were loaded onto the media through exposure to a simulated geothermal brine with known mineral concentrations. The data include the experiment results, rare earth element concentrations, and the experimental parameters varied. ...
The global market for rare earth elements is expected to reach USD 10.96 billion by 2020, according to a new study by Grand View Research, Inc. Growing demand for metal catalysts such as Cerium and Lanthanum is expected to drive the market over the next six years. These metal catalysts find applications across a host of industries including automobiles, metallurgy, phosphors and glass among others. In addition, growing market for permanent magnets is expected to particularly boost the demand for Neodymium. Certain rare earth elements such as terbium, europium and yttrium find applications in the phosphor industry. Phosphor is a vital component in the manufacturing of LCD screens and CRT displays, the growing electronic industry; particularly in Asia Pacific is expected to increase the demand for these elements. Depleting reserves, stringent regulatory framework, complex extraction and capital intensive nature of the extraction process are expected to be key challenges for market participants ...
This study is concerned with speciation and fractionation of the rare earth elements (REE) and calcium (Ca) in aqueous solutions. The aim is to investigate the chemical states and physical sizes in which these elements can be present. The REE (including neodymium) and Ca have contrasting geochemical behavior in aqueous solutions. Ca is a major dissolved element, while the REE are trace components and highly reactive with aquatic particles.. The major interests of the five papers included in this thesis are the following:. · Papers I and V deal with the behavior of neodymium (Nd) and its isotopes in the Kalix River and some marine waters.. · The diffusive gradients in thin-films (DGT) method is developed for measuring Ca and Mg in Paper II.. · Paper III presents a speciation and fractionation study of Ca in the Kalix and Amazonian rivers.. · The rare earth elements and their carrier phases are investigated in the Kalix river in Paper IV.. For most elements a detailed study of speciation and ...
China has emerged as the leading consumer as well as one of the major producer of rare earth elements. The nation accounts for almost 60% of the overall consumption and around 94% of the overall production of rare earth elements in the global arena. However, it is anticipated that the China will slowly lose its monopoly in the global market for rare elements in coming years. ...
USRE has the luxury of being able to concentrate on the processing and metallurgy, rather than the exploration thanks to its readily available stockpile. Idaho Energy and Resources Co. extracted the material as part of rare earths exploration and its published data suggests that the stockpile presents a high percentage of heavy and critical rare earth elements. The rare-earth deposits were first explored by the U.S. Geological Survey as well as the Idaho Bureau of Mines and Geology and IERCO among others. USRE can rely on a very experienced management and exploration team with many and successful years of experience in the sector and their determination to create an wholly American complete supply-chain solution, which will include a separation mill for the critical and heavy rare earth elements in the continental United States.. Mining companies in the West have been looking for ways to compete with Chinas rare earths industry. But actual success remains elusive, at least until the next few ...
Take a few minutes to read Congressman Mike Coffmans piece today in the Washington Times. The Colorado Congressman, co-chair of the House Rare Earths Caucus and lead sponsor of the RESTART rare earths bill, notes that the popular Call of Duty video games newest version - Black Ops II - incorporates a geo-political tug of war over rare earths metals into its storyline.. Coffman writes:. "Anyone familiar with the game knows that it models itself more on SEAL Team 6 and less on the Defense Logistics Agency. This years offering, however, offers a plot focused on rare earth materials and a "cold war" developing between the United States and China over access to these critical materials. Though the kinetic pace of the action is pure Hollywood, the competition between the countries for these critical materials is anything but fiction.". This isnt the first instance of Art imitating Life in the geo-politics of rare metals. Black Ops rare earths plot line follows Eric Van Lustbaders Bourne ...
Highly technological applications and scarcity of supply have inspired the recovery of rare earth elements (REEs) from various resources. Many rare earth phosphate mineral concentrates are associated with fluorapatite (FAP). An acid pre-leach is required to selectively leach the FAP fraction as calcium salts, phosphoric acid and hydrofluoric acid prior to the sulphuric acid digestion to avoid the interference of calcium and other impurities in the downstream processing steps of the acid baked product, rich in REEs. Hence, investigation of the dissolution kinetics of FAP and solubility of trivalent rare earth metal ions and other major and minor impurities in different acid-sulphate solutions systems are important areas of current research.. This thesis focused on (i) the solubility of REEs using pure perchlorate/sulphate and mixed RE-carbonate salts in acid-salt mixtures and synthetic process liquors and (ii) dissolution kinetics of phosphate, fluoride and major, minor and trace metal ions from ...
Tracy Weslosky: Of course, this is a very critical point, which were, you know, in a very difficult topic of critical materials, and thats about economics. Youve also been able to clarify the economic advantage of Texas Rare Earth Resources. Can you tell us a little bit more about that?. Anthony Marchese: One of the criticisms that weve heard in the past regarding Texas Rare Earth Resources is the fact that we have a very low grade. It may be a surprise to people that in fact the Chinese clay deposits of which most of the world or all of the worlds rare earths come from actually are at a grade equal to or lower than that of Texas Rare Earth Resources. Nobody doubts the Chineses ability. Why? Because its all about net profit. Its not about revenue. Its not about expense. Its about, can you process at a cost less than you can sell it? Thats what Texas Rare Earth Resources economics are all about. We outline that in our PEA. If anything the numbers from the PEA relative to our recent ...
The aim of this research was to study the rare earth (REE) minerals in ooidal ironstone deposits of the West Siberian basin and the Turgai depression. Authigenic minerals (monazite and cerite) were described, and their main mineral form was identified as light rare earth element phosphate (LREE-phosphate) in this study. LREE-phosphate is included in ferruginous ooids, peloids, and oncoids and forms a consistent mineral association with Fe-hydroxides (goethite and its hydrated amorphous derivatives) and Fe-rich layered silicates (Fe-illite-smectite, chamosite, berthierine). The constancy of the mineral association in two deposits of different ages indicates a general mechanism behind the formation of these minerals. LREE-phosphates (authigenic monazite) are characterized by microscopic sizes (up to 24 μm), diverse morphology (mainly spherical or xenomorphic), and occupy spaces between the micro-cortex in ferruginous spheroids. This mineral can be found in other deposits of ooidal ironstone. According
Despite the increasing use of rare earth elements (REEs) and oxides (REOs) in various technologies, the information on their ecotoxicological hazard is scarce. Here, the effects of La3+, Ce3+, Pr3+, Nd3+, Gd3+, CeO2, and eight doped REOs to marine bacteria Vibrio fischeri and freshwater protozoa Tetrahymena thermophila were studied in parallel with REO dopant metals (Co2+, Fe3+, Mn2+, Ni2+, Sr2+). The highest concentrations of REOs tested were 100 mg/L with protozoa in deionized water and 500 mg/L with bacteria in 2% NaCl. Although (i) most REOs produced reactive oxygen species; (ii) all studied soluble REEs were toxic to bacteria (half-effective concentration, EC50 3.5-21 mg metal/L; minimal bactericidal concentration, MBC 6.3-63 mg/L) and to protozoa (EC50 28-42 mg/L); and (iii) also some dopant metals (Ni2+, Fe3+) proved toxic (EC50 ≤ 3 mg/L), no toxicity of REOs to protozoa (EC50 > 100 mg/L) and bacteria (EC50 > 500 mg/L; MBC > 500 mg/L) was observed except for La2NiO4 (MBC 25 mg/L).
DIV) Many of the technologies important to reducing green-house gas emissions involve the use of permanent magnets, specifically NdFeB magnets. Found in automotive motors, consumer electronics and in wind turbine generators, these high-energy permanent magnets play an important in our everyday lives. Despite their widespread use and the incorporation of rare earth elements in the magnets, it is estimated that perhaps as little as one percent of rare earth metals are recycled from spent and waste magnets. (P) One of the factors that impact recycling is the harsh conditions that are typically involved in the recycling process. ISURF #04150 and #04391 use pyrometallurgical techniques to selectively extract the rare earth elements from NdFeB magnets, leaving the iron and boron residue behind. The first extraction step uses liquid magnesium to selectively remove neodymium from the magnet, while the second step utilizes liquid bismuth to remove the dysprosium. The rare earth elements are readily ...
Larry Reaugh, CEO of American Manganese, a junior mining firm that recently filed a preliminary feasibility report for its Artillery Project in Arizona emphatically explained to MetalMiner that no shortage of ore exists; rather, "there is a shortage of grades because youre shipping a lot of gangue (worthless material) off to a smelter or to a ferroalloy plant, mostly in China. With grades declining, you have to enrich the material which adds to the cost.". Furthermore, he added, with shutdowns for plants producing less than 5,000 tons and/or not in environmental compliance, dwindling amounts of carbonate available (used in the refining process) along with declining ore grades, costs will only increase for the Chinese. Referencing a study conducted by the CPM Group, Reaugh said "they concluded that the price would average close to $2 per pound and China will become a net importer by 2018.". And that story looks very similar to the rare earth story where some have acknowledged that China could ...
Enjoy your cell phone and the anti-lock brakes in your car? One U.S. company is gearing up to wrest control away from China and start producing rare earth elements found in most modern-day devices.
Rare earth mines in particular those in southern part of China have serious ecological damages due to land and vegetation damage and water and soil erosion, during mining as very low grade of rare earth mines. There are too many small rare earth mines in southern part of China such as Jiangxi, Fujian and Guangdong. They are small in scale with simple and lagging behind mining technology. Some of them still employ the so called "hill resettlement" off-site pool leaching method. The recovery rate of rare earth is low with serious damage on eco environment. The mining of every 10 t of rare earth oxides will strip off land surface and generate 1000~1600 m3 tailings, damaging large amount of vegetation. The amount of tailings of a mine with annual capacity of 1000 t exceeds 200,000 ~ 300,000 t, which occupies about 20 mu (15 mu = 1 ha) land. In addition, mining without regulations and plans of individual mining sites continue to be existing after repeated banning by the government. These small ...
Rare earth elements (REEs) are presently regarded to be some of the most critical elements, being essential in future sustainable applications. One of the many examples is fluorescent lighting, which relies on REEs such as cerium, europium, gadolinium, lanthanum, terbium and yttrium. The high demand for REEs, low supply, price fluctuations and geopolitical factors have contributed to an increased interest in reclaiming these elements from end-of-life products. This publication reports on a new potential hydrometallurgical route to reclaim REEs in fluorescent lamp waste. The investigations were carried out at bench scale and laboratory pilot scale to assess the potential of a process based on leaching and solvent extraction. Real waste fractions of various compositions, originating from several companies that use different mechanical, physical and chemical processes to treat lamps, were studied. A multi-step leaching process that selectively dissolves different groups of metals in the waste was
LEXINGTON, Ky. (Nov. 21, 2017) - University of Kentucky researchers have produced nearly pure rare earth concentrates from Kentucky coal using an environmentally-conscious and cost-effective process, a groundbreaking accomplishment in the energy industry.. "As far as I know, our team is the first in the world to have provided a 98 percent pure rare earth concentrate from a coal source," said Rick Honaker, professor of mining engineering.. From national defense to health care, rare earth elements or REEs are essential components of technologies like iPhones, computers, missiles and other applications. Interest in REEs is at an all-time high in the U.S. right now, with the Department of Energy investing millions in research. Honaker has received $7 million from the department to produce rare earths from Kentucky coal sources, a feat he has now accomplished, and $1 million for other REE projects.. "The primary objective for our DoE (Department of Energy) project was to produce a concentrate ...
IMARCs latest study "Rare Earth Magnet Market - Industry Trends, Manufacturing Process, Plant Setup, Machinery, Raw Materials, Cost and Revenue" provides a techno-commercial roadmap for setting up a rare earth magnets manufacturing plant. The study, which has been done by one of the worlds leading research and advisory firms, covers all the requisite aspects of the rare earth magnet market.. This ranges from macro overview of the market to micro details of the industry performance, processing and manufacturing requirements, project cost, project funding, project economics, expected returns on investment, profit margins, etc. This report is a must-read for entrepreneurs, investors, researchers, consultants, business strategists, and all those who have or plan to have any kind of stake in the rare earth magnet market.. Key Questions Answered in This Report:. ...
Next time you use your mobile phone, spare a moment for the tiny yet vital ingredients that make this and many other technologies possible - the rare earth elements (REEs). Used in computers, fibre optic cables, aircraft components and even the anti-counterfeiting system in euro notes, these materials are crucial for an estimated £3 trillion worth of industries, with demand set to increase over the coming decades.
Press Release issued May 8, 2014: The global market for rare earth elements is expected to reach USD 10.96 billion by 2020, according to a new study by Grand View Research, Inc. Growing demand for metal catalysts such as Cerium and Lanthanum is expected to drive the market over the next six years. These metal catalysts find applications across a host of industries including automobiles, metallurgy, phosphors and glass among others. In addition, growing market for permanent magnets is expected to particularly boost the demand for Neodymium.
This thesis is concerned with the liquid-liquid extraction and separation of Y, Ce, La, binary mixtures, and ternary mixtures as well as synthesis of novel amide ligands for the extraction of rare earth elements. Chapter I is the general introduction of the practical process and applications of solvent extraction and its theory. It describes systems involving compound formation, ion-association and solvation as well as solvent loading capacity, dispersion and coalescence. The aims of this thesis are also presented. Chapter 2 presents an introduction to yttrium chemistry and recent developments in yttrium extraction chemistry. It describes the relevant factors affecting the liquidliquid extraction process to determine the optimum conditions for yttriurn extraction from sulfate liquor. These factors include TiOA concentration, contact time, pH value, temperature, aqueous phase composition, diluent and construct of McCabe-Thiele diagram. In addition, the synergistic effect of using TBP, TOPO and ...
Silica (SiO2)-derived nanoadsorbents are a powerful and attractive tool for the extraction and separation of rare earth elements (REE) from many perspectives such as reusability, efficiency and minimum impact on the environment. In the present work, we investigated two different methods of adsorption down to the mo
Study of rare earth element (REE) uptake from geothermal brine simulant by column loading, metal recovery through stripping, and regeneration of column for re-loading. Simulated brine testing. ...
M] Gmelin Handbook of Inorganic Chemistry : Sc,T,La-Lu Rare Earth Elements Part d6 Ion Exchange and Solvent ExtractionReactions. Organometallic Compounds ...
REE have a long history of use as tracers in magmatic, ore deposit, and more ... J.L. Rare earth element geochemistry of groundwater in the Palouse Basin ...
Lanthanide probes are a non-invasive analytical tool commonly used for biological and chemical applications. Lanthanides are metal ions which have their 4f energy level filled and generally refer to elements cerium to lutetium in the periodic table. The fluorescence of lanthanide salts is weak because the energy absorption of the metallic ion is low; hence chelated complexes of lanthanides are most commonly used. The term chelate derives from the Greek word for "claw," and is applied to name ligands, which attach to a metal ion with two or more donor atoms through dative bonds. The fluorescence is most intense when the metal ion has the oxidation state of 3+. Not all lanthanide metals can be used and the most common are: Sm(III), Eu(III), Tb(III), and Dy(III). It has been known since the early 1930s that the salts of certain lanthanides are fluorescent. The reaction of lanthanide salts with nucleic acids was discussed in a number of publications during the 1930s and the 1940s where ...
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This research work deals with the effect of rare earth oxides on the PP matrix with respect to the thermal and mechanical properties and to the photo-degradation under UV irradiation exposure. The rare earth oxides are used as tracers for the identification of polymer materials, in order to have an economically efficient recycling and high speed automatic sorting of plastic wastes. The addition of 0.1 wt% of such particles of a micrometric size has a minor effect on the mechanical and thermal properties of the traced materials, as well as on the photo-degradation of the polymer after UV irradiation exposure. For 1 wt% tracer content, before UV irradiation treatment, the melting and crystallization temperatures as well as the thermal stability of the PP matrix are slightly increased, whereas the elongation at break decreases from 10 to 50% for a cross-head speed of 250 mm/min. However, the addition of 1 wt% of CeO2 improves the photo-degradation resistance of the PP matrix to UV exposure due to ...
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Ferrofluids are extensively used for rare earth magnets study magnetic name tags magnetic domain structures in magnetic tapes, rigid and floppy disks, magneto-optical disks, crystalline and amorphous alloys, garnets, steels and geological rocks.. Commercial applications include rare earth magnets quality control magnetic name tags magnetic recording media and rare earth magnets identification magnetic name tags micro-defects in steel.. Ferrofluid is applied to rare earth magnets magnetic tape, disk or other specimen so that a thin layer magnetic name tags ferrofluid covers rare earth magnets surface. When rare earth magnets carrier liquid evaporates, rare earth magnets particles congregate at rare earth magnets domain boundaries. These appear as dark lines in visible light and c magnets for sale neodymium magnets viewed with a microscope. A small external magnetic field c magnets for sale neodymium magnets applied to rare earth magnets specimen to enhance rare earth magnets contrast magnetic ...
The report firstly introduced Rare Earth Permanent Magnet basic information included Rare Earth Permanent Magnet definition classification application industry chain structure industry overview; international market analysis, China domestic market analysis, Macroeconomic environment and economic situation analysis and influence, Rare Earth Permanent Magnet industry policy and plan, Rare Earth Perm
SIERRA BLANCA, Texas, December 9, 2014 (MARKETWIRED) -- Texas Rare Earth Resources Corp. (TRER), an exploration company specializing in the heavy rare earths, is pleased to announce that it has successfully advanced the process to produce a feedstock suitable for further separation into rare earth metals. This was accomplished by using chemical process technology that features continuous ion exchange (CIX) and continuous ion chromatography (CIC), both of which have been in use in metals and materials refining for more than 25 years.. Metallurgical work completed in 2013 demonstrated that rare earth elements (REEs) could be leached from crushed Round Top rhyolite at ambient temperature with relatively dilute sulfuric acid. The resulting leach liquids contained an appreciable amount of non-REE impurities relative to the total REEs in solution. Observed ratios of these non-REE impurities, (principally aluminum, iron, and magnesium) to the REEs, ranged from approximately 15 to 22:1. These impurity ...
SASKATOON, SASKATCHEWAN--(Marketwire - 10/26/10) - Great Western Minerals Group Ltd. ("GWMG" or the "Company") (TSX-V:GWG - News) (Pinksheets:GWMGF - News) announces that a new Rare Earths processing furnace has been ordered for the Companys wholly-owned subsidiary Less Common Metals Limited. ("LCM").The new furnace, which will increase LCMs processing capacity by approximately 50%, is scheduled to be in production by the 3rd Quarter 2011. The decision to proceed with the significant capacity expansion was driven by requests from LCMs international customer base.Less Common Metals Limited, located in Birkenhead, United Kingdom, is a world leader in the production and supply of Rare Earth based alloys and high purity metals. LCM has been in operation since 1992 and was purchased by Great Western Minerals Group in 2008 as a key step in GWMGs strategic plan to become a fully integrated Rare Earths producer."LCM has been supplying Rare Earth alloys and powders to large international companies ...