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食品安全历来是行业关注的重点。每一年"3·15"晚会上,都会曝光一大批食品企业,这也暴露出了我国在食品安全监管方面存在的一些问题。为了更好的保障食品安全,必须要加强食品安全监管,而加强食品安全监管就离不开风险评估机制。 相似文献
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1 IntroductionTheironalloysandcomplexesarewidelyusedasmagnetic ,optical,nuclearandsuperconductingmaterials[1~ 4].ManyironcomplexesareeasilysolubleinDM SO ,DMFandCH3CN .Investigationoftheelectrochemicalbehavioursofironcom plexeswouldexpandtheirapplicationfield… 相似文献
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Preparation of Gd-Ni alloy film in urea-NaBr melt 总被引:2,自引:0,他引:2
1 INTRODUCTIONGdin 4flanthanoidhasferromagnetic paramag netismtransformtemperature (Curiepoint) ,andthehighestmagneticthermalentropychangesatroomtemperature .Sofar ,itisstillthebestmagneticre frigerationworkingsubstancematerialatroomtem perature .Nowrareearth… 相似文献
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Electrochemical Behaviors of Fe~(2 ) and Sm~(3 )in Urea-NaBr Low Temperature Melt and Their Inductive Codeposition 总被引:1,自引:0,他引:1
TbFe2 isthemaximummagnetostrictivematerialatthepresenttime .AlthoughtheλofSmFe2 isslightlylowerthanthatofTbFe2 ,butthemagneticcrystalofSmFe2 haslessanisotropyandthemagnetostrictisnegative .Hence ,theSmFe2 canbeappliedtotheintel ligentmaterialssuchastypinghead… 相似文献
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1 IntroductionThefilmsofrareearth irongroupal loysrivetedmuchattentionbecauseoftheirfunctionalperformances(e .g .themagnet ic ,magneto opticalandhydrogenstorageperformances) .Sofar ,thesefilmsarepro ducedbysputteringorvacuumplating .Electrodepositionofrareeart… 相似文献
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