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Sincerareearthchelateswerefoundtoemitlaserinthebeginningof 1 96 0s ,thefluo rescenceproperties ,efficiencyandlifetimeforrareearthorganicchelateswereextensivelystudied .Thechelateswereprovednottobesuitableforlasermaterialsintheendof1 970s .Soinisuggestedtousera… 相似文献
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Effect of Long-term Intake of Rare Earth in Drinking Water on Trace Elements in Brains of Mice 总被引:2,自引:0,他引:2
Theimpactofrareearthsonenvironment,healthandecosystem ,anditslong termbio logicaleffectshavedrawnpeople′smuchatten tion ,manyworkshavebeendone ,butlittlehasknownabouttheeffectofrareearthontraceelements[1 ] .Traceelementsplayanim portantroleindevelopment ,meta… 相似文献
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Rareearthswereextensivelyusedinagri culture ,industryandpharmaceutical,soitisinescapableforrareearthmetalelementsspreadingintohumanbodythroughbiosphere ,butlittleisknownaboutthemechanismoftheirbiologicaleffectontheorganismmetabol icprocess[1] .Ourpreviousw… 相似文献
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Ceroussalthasbeenextensivelyusedinagricultureandindustry ,soitisinevitablefortheceriumandotherrareearthstoenterhu manbody ,butthemechanismandthemodeoftheireffectsonthemetabolicprocessoforgan ismareobscure[1] .Manypapers[1] showthattherareearthsareavidlyphag… 相似文献
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CationicradiusofrareearthelementsisclosetothatofCa2 .ItisgenerallysuggestedthatthereplacementofCa2 byTb3 inducessomealterationsofnativestructureofcalmod ulin (CaM ) [1] ,andtheresultingchangesinbiologicaleffectmaybeacauseoftoxicityofrareearths[2 ] .Wangetal[3] fo… 相似文献
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Rare earth elements (REE) have beenused in agriculture widely. But the mechanismof their biological effect is not very clear. REcould antagonize Ca2 in cardiac muslce[1]. Laand Gd could noncompetitively inhibit the ef-feet of Ca2 in cardiac muscular contraction,reduce the activity of adenosine triphosphatasein cardiac sarcoplasm and inhibit the contraction of atria and papillary muscle in guineapig, and cause the visible potential vibration.All these might be caused by the inhibition ofN… 相似文献
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