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The Expression Patterns of Cdc25A, Cdc25B, Sox2 and Mnb in Central Nervous System in Early Chicken Embryos
Cdc25A Cdc25B Sox2 Mnb CNS In situ Hybridization Chicken Embryo
2016/4/29
The sense and antisense digoxigenin-labeled RNA probes of four genes, Cdc25A, Cdc25B, Sox2 and Mnb, were produced by using SP6 and T7 RNA polymerases, respectively, and in vitro transcription. Express...
稳定型维生素K3(MNB)合成新工艺研究
维生素K3 合成
2008/10/24
本项目稳定型维生素K3,学名甲萘醌亚硫酸氢烟酰胺,分子式:C_17H_16N_2O_6S,分子量:376.42,为白色结晶性粉末,无臭,微溶于水(25℃,1.9克/100毫升),熔点178~180℃。该工艺采用相转移催化氧化技术,降低了反应温度、缩短了反应时间,同时使氧化收率提高了近20个百分点;采用离子膜电解技术,将废铬液全部电解再生,既消除了废弃铬液对环境造成的严重污染,又降低了产品的原料消耗...