The white products with high viscosity of chitosan were prepared used for the preservation of tomato and litchi from shells of a shrimp and a crab by acid soaking-alkali hydrolysis.
以废弃的蟹、虾外壳为原料,采用酸浸-碱解法制备出壳聚糖,将壳聚糖的醋酸溶液作为果蔬保鲜剂用于番茄和荔枝涂膜保鲜。
参考来源 - 利用生活废弃物制备果蔬保鲜剂·2,447,543篇论文数据，部分数据来源于NoteExpress
A new process which produce copper sulfate pentahydrate and activated zinc oxide from the used catalyst by soaking in complex acid has been introduced in this paper.
本文介绍采用络合酸浸法以废甲醇催化剂为原料制备五水硫酸铜和活性氧化锌的新工艺。
Soaking these parts in a mild acid solution such as vinegar may be necessary if there is an extreme amount of calcium buildup.
如果这个组件已被钙藻严重复盖，浸泡这些零件在温和的酸性溶液例如醋是必要的。
To whiten (a metal) by soaking in acid or by coating with tin.
在…上镀锡把(金属)浸在酸中或镀锡，使之变白。
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