全部 Abcepta Ancell Assaypro Boston Biochem EagleBio eylabs abbomax abfrontier academy biomed Agdia pblassaysci wpiinc ApexBio bellcoglass Binding Site BioAcademia BioAssay Systems biomax Biomol biontex Bio-Synthesis Caltag Clearsynth Creative biomart Cusabio Cyanagen Cytodiagnostics devatal dianova Elicityl GloboZymes hpc-standards Nordicbiosite o2si Omega Bio-Tek Ontores Profoldin PromoCell Stemrd tecomedical TheNativeAntigenCompany Uscnk XENOMETRIX ICL Lab Immuno Star immunodx maxvisionbio NanoHelix Abnova Addgene

全部 1 - 20000 20001 - 40000 40001 - 60000 60001 - 80000 80001 - 100000

实验方法原理当DNA 的稀盐溶液加热到80～100 ℃ 时, 双螺旋结构即发生解体, 两条链分开, 形成无规线团。一系列物化性质也发生改变: 260 nm 区紫外吸收值增高(增色效应) , 粘度降低, 浮力密度降低等。DNA 的变性的特点是