Wear behavior . Of acetal gear pairs .

乙缩醛齿轮副的磨损行为。

Acetal tubular load stabilizing frame .

令负重更为稳定。

Table 1 extent of escaped acetal and comparative viscidity of different chitosans .

不同种类的壳聚糖的脱乙酰化程度和相对黏度。

Butyraldehyde glycol acetal was synthesized from butyraldehyde and glycol by using iodine as catalyst .

以单质碘为催化剂，通过丁醛和乙二醇反应合成了丁醛乙二醇缩醛。

The classification and application of a polymer-supported lewis acid catalysts in organic synthesis , including esterfication , transesterification , synthesis of acetal and ketal , friedel-craft 's alkylation , eterification and rearrangment reaction of pinacol , etc. are in troduced .

介绍了高分子载体lewis酸催化剂的分类及其在酯化、酯交换、缩醛的合成、缩酮的合成、傅瑞德－克拉夫斯烷基化、成醚和口片呐醇重排反应等有机合成中的应用。