The substituent is deuterium.

取代基是重氢.

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The fluorescence intensity of porphyrin also relates to the substituent positions on the phenyl groups.

此外,荧光强度还与卟啉的苯环上取代基的取代位置有关.

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The effect of the substituent number and position on second order nonlinear - optical coefficients ? ? was studied.

研究了取代基数目及取代基位置对非线性光学效应的影响.

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Also , the substituent species and the position on phenyl ring effects the reaction.

苯环上取代基的种类及位置对反应也有影响.

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Property dependence of ABA triblock copolymers on the terminal substituent of azobenzene was investigated.

研究了偶氮苯端基取代基时ABA三嵌段共聚物性能的影响.

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