It was found that the substituent attached at the phenyl exerted influence on the yields of synthesis, on the experimental conditions of sulphonation and on the acid-base properties of the reagent.
研究表明，芳醛上取代基不同对卟啉的合成、磺化和试剂的离解平衡等有一定的影响。
The first work of this paper is measuring physical properties of chitosan. Degree of deacetylation(DD)of chitosan determined by acid base titration is about 83%.
实验首先对原料壳聚糖的物理性质进行测定：采用酸碱指示剂滴定法测定壳聚糖的脱乙酰度约为83%，应用粘度法测定其粘均分子量为十万左右。
The structure and properties of macroporous strong base - weak acid amphoteric resin were studied by using IR and DTA.
利用红外光谱、差热分析对大孔强碱弱酸两性树脂的结构与性能作些探讨。
The structure and properties of macroporous strong base - weak acid amphoteric resin were studied by using IR and DTA.
利用红外光谱、差热分析对大孔强碱弱酸两性树脂的结构与性能作些探讨。
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