简介：硒(Se)是生物必需的一种微量元素,其生物学功能主要是以硒蛋白的形式表现的,植物硒蛋白具有抗氧化、抗癌、提高免疫力等功能.综述了硒在植物中的存在形态、硒蛋白的分类及提取方法,并提出今后的研究方向.参21.

简介：Inordertodefinethemortalitycriteriaofplanarianobjectively,acasestudyofDugesiajaponicaexposedto1-octyl-3-methylimidazoliumbromide([C8mim]Br)wasperformedfollowedbyarecoveryculture.Theresultsshowedthatdefiningplanarianmortalityinlightofitsbodydisintegrationwasappropriate.Ifthedisintegratedtissueofaplanarianwasmorethan1/4ofitsbodylength,itwouldcompletelydegenerate.However,aplanarianwouldregeneratethelosttissueandreturntonormalafterafewdays’recoverycultureifthedisintegratedpartwaslessthan1/4ofbodylength.Therefore,weproposetousebodydisintegrationastheendpointofplanarianmortality,i.e.,1/4bodylengthdegeneratedisthecriticalthresholdofmortalityandsurvivalofplanarianswhenexposedtotoxicants.Thiscriterioncouldbeadaptedinthestandardizationoftestingprotocolsandcomparabilityofacutetoxicitytestorothertoxicologicalresearchusingplanarianasthetestanimal.