Thesis introduces methods of chitosan preparation from shrimp shell, and makes application study of chitosan in clarifying fruit juice and keeping food fresh.
本文介绍了用虾壳制备壳聚糖的方法，并进行了壳聚糖在果汁澄清和食品保鲜方面的应用研究。
This thesis studied on the preparation, characterization and capability of nanosized zinc carbonate and zinc oxide.
本论文研究纳米碳酸锌和纳米氧化锌的制备、表征和性能。
Concept of PTFE dispersion and its performance are introduced. PTFE glass cloth, its derivative products and PTFE porous metal, preparation thesis and method process are reviewed, respectively.
介绍了聚四氟乙烯分散液的概念和有关性能。叙述了PTFE玻璃布及其衍生产品和PTFE多孔金属的性能和用途，制备原理、方法和工艺。
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