1、

A bonded stationary phase for gas chromatography has been prepared by the thermal reaction between 405 white support and PEG 20M.

本文采用热反应键合法,将PEG-20M与405白色硅藻土载体进行热键合制备气相色谱键合固定相。

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2、

Carbon-supported Pt-Fe alloy and Pt catalyst were prepared by two-step reaction containing liquid deposit and gas-solid reducing. Three active carbon carriers were investigated.

用铁作掺杂元素,通过液相均相沉淀-气/固高温还原两段反应方法合成了碳载Pt-Fe合金电极催化剂。

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3、

Also, as the increasing competition between telecom services, diversity of front end business model and customer satisfaction, to a great extent, are decided by the reaction speed of front end business and back end billing system, as well as flexibility and support ability.

当今电信业务的竞争日趋激烈,前台营业和后台计费系统的反应速度、灵活程度、支撑能力在很大程度上决定了运营商前端业务模式的多样性和客户体验的满意程度。

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