unsaturated bond meaning in English
不饱和键
Examples
- Several mechanistic studies indicated that the structural features necessary for the expression of mutagenic activity include a hydroxyl group at position c13 and an unsaturated bond joining the c16 and c17 carbon atoms of steviol
多项生理机能研究显示，显露基因突变的特性结构位于甜菊醇c13位置的羟基组，以及连结c16和c17碳原子的不饱和链。 - Several mechanistic studies indicated that the structural features necessary for the expression of mutagenic activity include a hydroxyl group at position c13 and an unsaturated bond joining the c16 and c17 carbon atoms of steviol
多项生理机能研究显示，显露基因突变的特性结构位于甜菊醇c13位置的羟基组，以及连结c16和c17碳原子的不饱和链。 - In addition , the heparinase is stimulated in the presence of ca2 + and mn2 + , but is inhibited by cu2 + and fe3 + . neither pmsf nor edta significantly affected enzyme activity . by infrared spectrum and proton resonance spectrum analysis , we found smaller polysaccharides , unsaturated bond and reducing sugar , which are specific products by heparinase
在产物分析中发现，该酶作用于肝素后，还原糖数量明显增加，通过红外色谱及质子谱的分析发现，产物中出现了含不饱和双键的还原寡糖，这是肝素酶作用于肝素后的特异性产物，从而可以进一步证明该菌确实产生肝素酶。 - Abstract : the preparation conditions of unsaturated polyester ( up ) resins modified by pet were introduced in this paper . the copolymerization mechanisms of the synthesis of up resins from cis - and trans - anhydride were researched . the relationship between the modified resins activities and the structure of unsaturated acids were also discussed . the reason for the differences of the exothermal curves of the two resin systems was that the activity of the cis - and trans - unsaturated bonds was different from each other
文摘:本文研究了由聚酯改性合成不饱和聚酯树脂的反应机理和工艺条件，讨论了改性树脂反应活性与不饱和酸结构之间的关系，解释了顺、反式双键结构对改性树脂固化放热特性和反应活性不同的原因。