共价

In order to mimic this repair process of apoenzyme, we synthesized two model compounds, in which tryptophan and/or tyrosine was covalently linked to cyclobutane thymine dimer, and measured the splitting quantum yield of dimer under 295 nm light. By investigating the photosensitized splitting properties of the dimer, some new insights into the intramolecular electron-transfer process were gained.

为了模拟酶蛋白的这一修复过程，合成了色氨酸和/或酪氨酸与胸腺嘧啶二聚体共价连接的化合物，作为酶-底物复合物的模型，研究了它们在295 nm光照射下氨基酸残基光敏化二聚体裂解的性质，测定了二聚体裂解量子产率，获得一些新的结果并对其进行了分析。

Several modified technology of food protein——acylation, phosphorylation, deamidation, glycosylation, cross linking, proteolysis were reviewed.

综述了酰化作用、磷酸化作用、脱氨基作用、糖基化作用、共价交联作用和蛋白水解作用等6种蛋白质改性技术及最新进展，认为用2种或2种以上方法先后对蛋白质改性是当今普遍使用的技术。

The plasmid DNA bands were detected clearly by agarose-EtBr gel electrophore sis.Two forms of plasmid DNA molecules,namely covalently closed circular DNA mol e-cules and open circular DNA molecules,were observed under electron microscope.

用琼脂糖-溴化乙锭凝胶电泳分析在两株菌的DNA中鉴别出明显的质粒带，用电镜方法在两株菌的DNA制剂中均观察到共价闭合超螺旋和开放型环状两种构型的DNA分子。

The water absorbed in the vulcanizates presents thermodynamic properties somewhat different from those of water in the bulk liquid, and exists in three states in the vulcanizates: free water, freezable bound water and non-freezable water.

硫化时，在过氧化物自由基的引发作用下，橡胶产生了共价交联、丙烯酸盐单体也发生了均聚，同时被部分接枝到橡胶分子链上，最终在硫化胶中生成交联橡胶、丙烯酸盐均聚物、丙烯酸盐和橡胶的接枝聚合物以及未聚合的丙烯酸盐单体。

In Vitro Antibody Evolution Targeting Germline Hot Spots to Increase Activity of an Anti-CD22 Immunotoxin.

FcRn从结构上来说是MHC I 型分子，由一个α链和一个β2微球蛋白以非共价形式结合。

The PEI grafted on the surface of nylon was modified by the alkyl halide such as bromohexane and iodomethane,to give high-molecular-weight antimicrobial quaternary ammonium salts.

尼龙6用4-溴丁酰氯活化，再与高分子聚乙烯亚胺在有机溶剂中进行反应，使PEI共价接枝在载体上，然后用卤代烷对接枝在尼龙6上的PEI进行烷基化反应，使其形成具有杀菌功能的高分子季铵盐，制备出尼龙树脂固定化的高分子抗菌杀生剂。

The nylon was activated with organic functional groups,and after that reacted with high-molecular-weight polyethyleniminein the organic soleent. PEI was grafted covalently on the surface of nylon. The PEI grafted on the surface of nylon was modified by the alkyl halide such as bromohexane and iodomethane,to give high-molecular-weight antimicrobial quaternary ammonium salts.

摘 要：尼龙6用4-溴丁酰氯活化，再与高分子聚乙烯亚胺在有机溶剂中进行反应，使PEI共价接枝在载体上，然后用卤代烷对接枝在尼龙6上的PEI进行烷基化反应，使其形成具有杀菌功能的高分子季铵盐，制备出尼龙树脂固定化的高分子抗菌杀生剂。

On the bases of a solid solution hardening model, and considering the solubility of isoelectronic impurities in InP crystals and the elastic misfit arised from the differences of the tetrahedral radii between added impurities and host atoms, the pinning forces as large as 〓 have been obtained for isoelectronic impurities in InP.

以InP单晶中的等电子杂质为例，根据固溶强化模型，考虑了等电子杂质在InP单晶中的溶解度以及掺入杂质与基质原子之间共价半径之差引起的弹性失配，计算了这些杂质在InP中对位错的钉扎力可达10〓～10〓达因/厘米〓，从而很好地解释了等电子杂质降低位错密度的作用。

The inhibiting rate of natural antigene oligonucleotide was also only 25％ with the similar treatment. Compared with the natural oligonucleotides, the inhibitions of mdrl gene expression by the naphthyl imide-conjugated oligonucleotides were enhanced as much as two times.

与天然片段相比较，在同样条件下，萘二酰亚胺对寡核苷酸的共价修饰可以成倍提高寡核苷酸抑制基因表达的效率。

Complement-mediated opsonization involves the covalent binding of activated C3 and/or C4 to microbes, which allows, in turn, the recognition and phagocytosis of these microbes by phagocytes bearing complement receptors on their surface.

补体介导的调理作用需要有C3和C4与微生物之间的共价联结，它们分别导致表面有补体受体的噬菌细胞对微生物的识别和吞噬。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。