1. Traditionally, the rare earths have been used as catalysts in the chemical industry and in flints for cigarette lighters.

2. Nu : tiepeng production, sale, rare earth products sales.

3. Corrosion protection mechanism of rare earth passivation was stated.

4. A rare earth chrome plating additive was studied.

5. The distribution patterns of rare earth elements of pitchblende and surrounding rocks in three types of uranium deposits have been studied.

6. Cerium :Chemical element, a rare earth metal of the lanthanide series (hence having many properties of the transition elements), chemical symbol Ce, atomic number 58.

7. The contents of 8 rare earth elements(REEs)in chloroplasts of Brassia napus were determined by instrumental neutron activation analysis.

8. Different dopants including rare earth metals, alkali earth metals, transition metals and other elements are introduced, and the trend of the mixed oxides in exhaust purification is prospected.

9. Eleven solid quaternary complexes of rare earth perchlorate with diphenyl sulfoxide (L) and benzoic acid (L') have been synthesized and characterized.

10. Experimental result indicated that rare earth element may promote growth of hypha and increase weight of dry matter, and also improve quality and nutrient value of edible fungi.

11. A trivalent metallic element of the rare earth group, it could occurs with yttrium.

12. The catalytic activity of the rare earth metal complexes synthesized with the PSM similar to above-named structure was not good.

13. Prices of some rare earth metals have doubled in just three weeks amid heavy stockpiling in China that has raised fears over global supplies.

14. Applied properties of rare earth stablizers and their mechanism of thermostable action are described.

15. Leaves of Dicranopteris dichotoma collected from a rare earth ore area and two control areas were separated into ether fractions, water fractions, base fractions and residues.

16. China produces 97 percent of the world's rare earth metals, which are also used in the production of other high-tech and defense products.

17. The experimental results indicate that rare earth ions are tend to produce periodic precipitation and the precipitation of the pattern was just the corresponding rare earth cholate complexes.

18. Moreover, it gives the outlook of rare earth phosphor used for lamp.

19. High strength rare earth foam aluminium alloy is prepared in our laboratory by smelting bubble system.

20. The strengthening mechanism of rare earth element in sintered copper molybdenum steel has been studied.

21. The phosphate glasses doped with rare earth ions have been widely used in laser mediums and optical filter materials for their outstanding optical and spectrum characteristics.

22. This paper introduces a dual-winding switched-type control system of rare earth permanent magnetic (REPM) brushless DC motor (BLDCM) used in automatic washer.

23. Too high residual magnesium content, and especially too high residual rare earth content is the main reason causing reverse chill defect. So them...

24. The preparation method of tributyl citrate and acetyl tributyl citrate by solid super acid, rare earth solid acid, heteropoly acid et al. were reviewed.

25. In this paper, the effect of different laser cladding parameters and different rare earth contents on cracking susceptibility of aviation blade with casting defect cladded by laser was studied.

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26. He added: "It looks like we could reduce cost, weight and mass and avoid the geopolitical issues with the rare earth metals."

27. The phenomena of periodic precipitation occurred in gel medium were observed in rare earth cholate systems. The complexes of the pattern are characterized by FTIR and EXAFS spectroscopy methods.

28. The world is now scrambling to find other sources of supply; the development of rare earth mines in the U.S., Australia, Russia, and other countries may eventually cut into the smugglers' business.

29. An account of main development and main advances of rare earth hydrogen storage cell is given in this paper.

30. In light of those problems it is strongly recommended that special tundish covering flux and mold flux be researched and developed for continuously casting rare earth...

31. The D-axis armature reaction of rare earth permanent magnet synchronous generator has been analysed.

32. The kinetics curved lines of chlorinating rate on chlorinating rare earth of Weishan mid-grade bastnasite in Shandong after fixed fluorine were determined.

33. Accordingly, there can be no assurance as to the quantity or quality of such rare earth deposit or that such deposit will become proven or probable reserves.

34. The result showed that ligand has good coordination ability with rare earth ions, and a binuclear complex was formed.

35. Smelting of SiMgREBa alloy with rare earth rich slag, barite and lime in electric-arc furnace is introduced in the paper.

36. The impact test, the thermal shock test and the scanning electron microscopy were used to investigate the effect of rare earth oxide on the adhesiveness between the glass coating and the base metal.

37. "Because of the importance of these rare earth minerals, I think both the minister and I are aware that our countries and others will have to look for additional sources of supply," Clinton said.

38. The structure changes of silk fiber with different weight gain, by using sericin fixing agent containing rare earth metal ion, were studied in this paper.

39. Etherification of methanol with ethylene oxide(EO) was investigated systematically on the pillared rare earth solid acid catalyst.

40. Other types of magnets could be used in turbines, and rare earth metals could be recycled.

41. Rare earth chlorides were used to catalyze the synthesis of 2-butoxy-3, 4-dihydro-2H-pyran using equimolar acrolein and vinyl butyl ether.

42. The influence of rare earth elements on low temperature salt-bath chromizing for T10 steel was studied by optical microscope, SEM, XRD and microhardness tester.

43. The reductive extraction method of bastnasite baked by sodium carbonate and low acidity HCI leaching for making rare earth chloride is reported.

44. This paper states the mechanism of mechanically alloying & its application in rare earth permanent magnet materials.

45. As a long - time researcher on rare earth metals, I have a say on the issue.

46. This method could also be applied to prepare praseodymium oxides, however, it was not successful in preparing other light rare earth oxides.

47. This paper presents the possibility of making nodular graphite cast ironbyinjection of rare earth alloys instead of magnesium as nodularizer to themolten iron with different sulfur content.

48. Recent studies have shown that natural amino acids can form stable complexes with rare earth ions under near physiological condition and the complexes have high solubility.

49. And now, allegedly, China has refused to export rare earth oxides, rare earth salts, and pure rare earth metals.

50. The air gap magnetic field characteristic of rare earth permanent magnet salient - pole synchronous generator is studied.

51. It requires that the military conduct an immediate review of its needs for rare earth metals, which are mined elements increasingly crucial in sophisticated technologies.

52. The theory of the photoacoustic (PA) phase has been studied. The PA phase spectra of rare earth complexes with dibenzoylmethide have been explained basing on the theory.

53. A novel solid complex of gelatin hydrolysate and cerous chloride was synthesized successfully, and the complex reaction between gelatin hydrolysate and rare earth cerium was verified by FT-IR.

54. Synthesises rare earth complex monomer was conducted by sedimentation and direct method. The rare earth organic ionomer was synthesized by copolymerization of acrylic acid monomer.

55. Late last week, Japan's trade minister, Akihiro Ohata(http://), said he would ask the government to include a "rare earth strategy" in its supplementary budget for this year.

56. In this paper , the new model rare earth - molybdenum materials were reviewed.

57. The mineralization is studied with emphasis on ore geology, rare earth element haloid element and metallogenic model.

58. One martensite wear - resistant alloys of rare earth - chromium is the national patent applications for the project.

59. The premature failure modes of firebrick forming dies made of steel 10 and its failure reason are analyzed. The possibility of using rare earth Mg ductile iron to replace steel 10 was expounded.

60. This paper describes the essence and removing methods of the color spot which is easy to meet when tanning with rare earth salt assisting chrome.

61. Glass microspheres doped with rare earth elements were prepared and characterized by powder X ray diffraction (XRD), scanning electron microcopy (SEM), and Raman spectrum and so on.

62. Because of the radioactivity in waste water of rare earth factories, the purificatory principle of radioactive waste water, and adsorption of some clay minerals and soils for rare earth was studied.

63. The effect of ferro-silico-barium and its rare earth complex alloy on mechanical properties, castability and metallographic structure of cast iron containing Pb, As and Sn have been studied.

64. Rare earth alloys have many desirable chemistry and magnetism behaviors, unusual optical and seizing thermal neutron properties, which provide the foundation for their applications.

65. The chemical structure changes of the silk fibers after the sericin fixing with the sericin fixing agent containing rare earth metal ions were analyzed with FT-IR and laser Raman spectra.

66. The invention relates the rare earth modified leadless X ray barrier plastic.

67. The rare earth permanent magnet brushless DC square wave motor is a new type of motor.

68. When the mixed rare earth oxides are chlorated, the components and partition of the rare earth are an important factor influencing the chlorate ratio and reaction rate.

69. The magnetic field distribution in rare earth electrolytic cell is calculated by numerical simulation. Through the analysis, the magnetic field is produce mostly by cathodal electrode current.

70. A calculation method based on the concept of "senary" is presented, to start up a contra-rotative rare earth permanent magnet brushless direct current motor (CR REPM BLDCM).

71. The rare earth compound powder characterization system comprises properties of crystal, surface, particle , powder and usage.

72. Of course, Beijing may react harshly to some of these measures and threaten a renewed embargo on the export of rare earth metals.

73. Since 1963, we have found a relatively new "family" of coordination catalysts composed of rare earth compound for stereospecific polymerization of conjugated dienes.

74. A new type of Y base heavy rare earth modificator was developed.

75. Uses the rare earth alloy manufacture the microsection life to be longer.

76. The main reason that rare earth cerium can improve elongation of ZA27 alloy is that cerium increases the compositional undercooling of the alloy.

77. I wouldn't rely on my advice about the gold price, not if I were you: my professional expertise is in the rare earth metals, a very different game indeed.

78. The colour reaction of the reagents with bismuth, rare earth and thorium have also been studied.

79. The experimental results show that adding rare earth oxide into molybdenum can improve the secondary emission coefficient of the emitter.

80. Objective To investigate the toxicological effects of long-term exposure to mixed dust containing radiothorium rare earth on workers.

81. Zirconium in rare earth - magnesium - zirconium master alloy was determined by EDTA titrimetry.

82. The influences of rare earth micro fertilizer on leaf photosynthetic rate, the content of chlorophyll and protein were studied respectively in peach ( Prunus persica ).

83. The distribution of Rare Earth contents in different parts of Ferricf lowers which grew in Bayan Oho mine was studied.

84. Rare earth noctilucent fibers are a kind of new materials, provided with special function.

85. We outlined the history of optic amplifiers, analysed the advantages and disadvantages of EDFA and FRA,(http:///rare earth.html) and the application area of rare earth doped tellurite glass amplification fiber.

86. And on this basis, the usage of all recipes in the decentralized system of the rare earth luminous coating is studied.

87. When the molar ratio of the rare earth ion and MP-11 is increased to the certain extent, the interaction would destroy the regular structure and inhibit the electrochemical reaction of MP-11.

88. In this paper, the illuminant principle and functional characters of rare earth noctilucent fibers were summarized, and then analyze its wearability and application area.

89. The new rare earth modified processing aid (WAC) used for PVC is introduced.

90. Any car with an electric motor will use these rare earth metals," he added.

91. To evaluate the water quality of Chagan Lake by analyzing 15 metal elements and 15 rare earth elements (REE) contents in rainfall season and rainless season of Chagan Lake of Jilin province.

92. This topic develops for country 863 plans projects "explosion-proof rare earth permanent magnetism synchronous motor".

93. This paper introduced the process technology of resinoid diamond grinding wheel for grinding rare earth permanent magnet materials.

94. The growth of CNTS( carbon nanotubes) by catalytically cracking ethylene in the presence of the supported catalyst doped with rare earth samaria is reported.

95. Yet another rare earth metal, lanthanum, is a major ingredient for hybrid car batteries.

96. Light ageing properties of poly(vinyl chloride)(PVC) by the carboxylic ester rare earth salt and the organotin have been compared by artificial ageing test.

97. Rare earth metals have purifying and fining and alloying effects.

98. At the Mountain Pass mine in the Mojave desert region of California, construction is well underway on the modernization of the historic rare earth project.

99. The development of rare earth chromophore solves the incompatibility of rare earth with the organic component in the hybrid films, thus the concentration of rare earth can be greatly improved.

100. Integrating electromotor and generator, a rare earth permanent magnet brushless direct current motor (REPM BLDCM) control system based on DSP in the HVC is studied.

101. Electric cars require much larger motors, with more rare earth metals, than hybrids such as the Prius.

102. Precipitation by oxalate is the primary method to produce rare earth oxides.

103. Determination of rare earth and trace elements in teeth enamel was studied by inductively coupled plasma mass spectroscopy.

104. The stability of the rare earth picrate complexes with open-chain macrocyclic compounds was described quantitatively.

105. The main bottleneck, they argue, could be the production of rare earth metals such as neodymium, which is often used in making magnets.

106. In this paper, the effects of magnesium tablet, rare earth magnesium and mixed nodulizer on heavy section ductile iron are studied under the simulating test condition.

107. The recent advance of the synthesis and characterization of rare earth organometallic complexes involving cyclopentadienyl types is reviewed.

108. Rare earth metals, such as metallic neodymium and metallic didymium (metallic praseodymium -neodymium), are used for rare earth magnets, mainly neodymium-iron-boron magnet.

109. But the researchers were able to pull all these tricks off at once using a lithium niobate crystal doped with rare earth ions and chilled to -454 degrees.

110. The precipitatation process of rare earth in nitric acid was investigated and the relationship between supersaturation and mean particle size of rare earth oxalate was obtained.

111. The results show that the recovery rate increased as the increase of the content of rare earth metals in Sm-Eu-Gd concentrate and the purity of europia.

112. The invention relates to a sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and a preparation method thereof.

113. 'We expect that rare earth market conditions could change quickly, and they remain an uncertainty for the foreseeable future, ' Grace said in the half-yearly report last month.

114. Rare earth permanent magnetic second-ranking series motor, low temperature and long using torque not decline.

115. China'sdominant market position in the production of rare earth metals is producing abacklash for the country, he says.

116. Rare earth metal: Any of a large class of chemical elements including scandium (atomic number 21), yttrium (39), and the 15 elements from 57 (lanthanum) to 71.

117. In process of synthesizing N oxidized pyridine, rare earth hetero polyacid was used as catalyst and extortion was canceled.

118. Adding different quantity of rare earth nitrate to the Carassius auratus feed and researching the effect of rare earth on the production performance and nutritional status of Carassius auratus.

119. Traders say illegal refineries pay outlaw miners for semi-processed rare earth ore with sacks of cash.

120. A method for determination of 14 rare earth impurities in high purity thulium oxide by ICP-AES has been developed.

121. The rare earth permanent magnet alloy with a high coercive force is disclosed.

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