窄带数字程控交换网(电路交换网)作为中国电信为广大客户提供话音业务、程控新业务和补充业务,进行信息交流、沟通的基础性网络,经过近20年的发展,网络规模不断扩大,为中国电
As with HPLC, capillary GC method development ideally includes screening several different stationary phases (and maybe phase ratios) for most promising sel
Pyrolysis-gas chromatography (Py-GC) and liquid chromatography (LC) are widely used for the characterization of (co)polymers.The combination of organic SEC
For the simultaneous metabolic profiling analysis of catecholamines and polyamines in a single run, catecholamines and polyamines were first converted to (N
本文应用XG-2型血循环功能测定仪和化验测定,对44名高温作业工人(高温作业组)和44名非高温作业工人(对照组)进行了血循环功能、血粘度及其影响因素的调查。结果显示高温作业
最近一段时间,我一直在用肾脏思考有关股市的问题。 两年前,股市还在1000 点徘徊的时候,我清楚地记得我是用脑子在思考,将各种最坏的可能摆了一遍。那时候可不像现在,稍微一手软,一秒钟的犹豫,就买不到理想价位的股票了。那时候的中国股市,每天的成交量非常稀少,股价不怎么波动,如果有波动,也是向下的。所以,我有充裕的时间去点上一支大号的雪茄,靠在皮椅子上慢慢地想问题,仔细地研究公司的基本面和估值方法。
Artemisia annua L.(qinghao) is an annual herb native of Asia and this plant was famous for the discovery of the anti-malarial drug artemisinin since 1971.It
苹果公司似乎打算指着IPOD过活了,这年头,能够这样流行的东西还真不多见。长得漂亮又有人肯捧场,相信乔布斯做梦都会笑醒的。但是,对于大众来说,IPOD 这玩意儿真是又爱又恨。
The pesticide chemist has a variety of options to choose from when it comes to sample injection modes.The more common injection mode is conventional splitle
The current work demonstrates the use of two new and unique phases, which have been optimized for the analysis of all classes of pesticides.The phase chemis