Synthesis and Biological Activities of N—Phosphory Branched Peptides

A series of N-phosphoryl branched peptides were synthesized by coupling of various N-phosphoryl amino acids to L-Lysine methyl ester,and their structures were confirmed by ^31PNMR,^1H NMR,MS and elemental analysis.The results of cell biological tests indicated that compound 1d and 1e obviously inhibites the growth of both k562 and A2780 cells.     

保持理想的Gr(o)bner基的同态映射的一个有效判定方法

设Θ是k[x1,x2,……,xn]上的自同态映射,＞,＞′分别是有理项序.本文刻划具有下列性质的同态映射Θ对任意Grobner基G(关于项序＞),GoΘ仍是Grobner基(关于项序＞')并且较好地解决了Hong的问题1[1].     

锆(Ⅳ)-香草基荧光酮-Tween 20络合显色反应研究及其分析应用

在0.24～0.36mol/L盐酸介质中和Tween20存在下,香草基荧光酮与锆(Ⅳ)发生灵敏的显色反应,有色络合物的最大吸收波长为530nm,表观摩尔吸光系数为1.39×10~5L·mol~(-1)·cm~(-1)。锆(Ⅳ)含量在0～12μg/25mL范围内符合比尔定律。方法适用于铝合金中锆的直接测定,结果令人满意。     

A Novel Ultrafine Ru—B Amorphous Alloy Catalyst for Glucose Hydrogenation to Sor

An ultrafine Ru-B amorphous alloy catalyst was prepared by chemical reduction with KBH4 in aqueous solution,which exhibited perfect selectivity to sorbitol(～100%）and very high activity during the liquid phase gluecose hydrogenation,much higher than the corresponding crystallized Ru-B,the pure Ru powder,and Raney Ni catalysts.The correlation of the catalytic activity to both the structural and surface electronic characteristics was discussed bricfly.     

神经网络中的逼近问题

本文主要讨论径向基神经网络对函数，连续泛函及连续算子的逼近．     

铋(Ⅲ)-槲皮素极谱络合吸附波及微量铋的测定

在ｐＨ＝３．８，０．４ ｍｏｌ／Ｌ的ＨＣＯＯＨＨＣＯＯＮａ缓冲溶液中，铋与槲皮素的络合物在单扫极谱仪上能形成灵敏的络合物吸附波。该波在Ｂｉ３＋离子浓度为４ × １０－８～６×１０－６ｍｏｌ／Ｌ范围内与波高 ｈｐ成正比关系，检出限达到１×１０－８ｍｏｌ／Ｌ。对电极反应的机理进行了研究。利用该极谱波测定了铅基轴承合金中的铋含量。     

硅基双势垒金属-绝缘层-金属-绝缘层-半导体隧道发光结

讨论了硅基双势垒金属－绝缘层－金属－绝缘层－半导体（MIMIS）隧道发光结的结构、制备方法及发光特性。所制备的样品最大发光亮度达到1．9cd/m^2、光谱的峰值波长移到了蓝绿光区，表明双势垒MIMIS隧道发光结的性能优于单势垒金属－绝缘层－半导体（MIS）隧道发光结。利用量子力学的共振隧穿效应对它作了较好的解释。