亚麻屑中的纤维分离

本文阐述了麻屑板生产中，麻纤维需多次分离的重要性和分离方法。

SD大鼠视网膜小胶质细胞原代培养方法的改良

目的对经典的原代视网膜小胶质细胞体外纯化培养方法进行简单的改良以提高细胞产量。方法在视网膜小胶质细胞原代培养过程中以McCarthy等的经典方法为基础,寻找适当的初始种植密度,并在初次振荡分离后继续培养以获得多次产出,使用免疫细胞化学染色方法进行小胶质细胞纯度鉴定。结果视网膜小胶质细胞原代培养最宜初始种植密度为1×106/mL,多次分离纯化获得的视网膜小胶质细胞均达到97%以上的纯度。结论视网膜小胶质细胞原代培养过程中,以适当的初始种植密度和多次振荡分离方法可在保证有效纯度的基础上提高细胞产量。

国产分离式多次用直管状吻合器在Dixon保肛术的应用（附25例报告）

为探讨国产分离式多次用直管状吻合器在Dixon保肛术中的应用价值，对25例使用国产分离式多次用直管状吻合器病例进行总结分析。结果25例均一次吻合成功，无吻合不全及漏钉情况。术后发生吻合口漏2例，吻合口狭窄5例。结果表明，国产分离式多次用管状吻合器具有操作简便快捷、吻合成功率高的优点，提高了直肠癌保肛的成功率，其能重复使用，价格低廉，适于在基层医院推广。

记宁津乡拆船厂综合防污染的经验

一个小型拆船厂，怎样才能在现有的技术条件下达到《中华人民共和国防止船舶污染海域管理条例》的要求呢?山东省荣成县宁津乡的做法是：

A Multi-Level Authorization Based Tenant Separation Mechanism in Cloud Computing Environment

Separation issue is one of the most important problems about cloud computing security. Tenants should be separated from each other based on cloud infrastructure and different users from one tenant should be separated from each other with the constraint of security policies. Learning from the notion of trusted cloud computing and trustworthiness in cloud, in this paper, a multi-level authorization separation model is formally described, and a series of rules are proposed to summarize the separation property of this model. The correctness of the rules is proved. Furthermore, based on this model, a tenant separation mechanism is deployed in a real world mixed-critical information system. Performance benchmarks have shown the availability and efficiency of this mechanism.