选择反应

Furthermore, proton singlets of Fmoc group were treated as internal standard because of their station in both starting material and product.

用HR／MAS NMR分析技术不仅跟踪优化了固相羟基氨基酸的糖基化反应条件，而且选择固载在树脂上的糖基化Nα-Fmoc保护羟基氨基酸〓H NMR中最低场，且分辨好的Fmoc保护基信号做为内标，糖上乙酰基的积分面积为标准直接定量了键合在Tenta Gel S NH〓树脂上氨基酸甙化的产率。

Under the condition of 3 time mol equivalent magnesium,CuI 15mo1%, 45℃temperature and 10 hours reaction time, this preparation is notefficient to facilitate unsymmetry selenides.

我们选择溴苯与对溴甲苯在1倍镁量不同的催化剂的条件下反应，我们在光谱数据进行分析对比，可以看出只有溴基硒醚，并不能生成不对称有机硒醚。

The next time you can make the paper business card printing and membership card making some pattern, so that some passerby picked their favorite patterns; and then again based on their choice of showpotential has been printed samples, take a look at what these people.

你下次可以先在纸上制卡和会员卡制作一些图案，让一些路人挑选他们最喜欢的图案；然后再根据他们的选择展示出已经印好的样品，看看这些人会有怎样的反应。

Institute of Infectious Diseases,Zhejiang Medical University,Hangzhou 310003 Objective The study was designed to investigate whether there existed provirus HIV DNA in the liver tissues of intravenous drug users with seronegative results of anti-HIV test.Methods We detected 38 liver tissues of seronegative IVDUS and 10 liver tissues of non-IVDUS.

选择38例抗-HIV阴性的静脉药瘾者肝组织，10例非静脉药瘾者肝组织，用巢式聚合酶链反应，分别在HIV gag、pol、env三大结构区，用六对引物进行HIV DNA扩增。

Fifteen 1st trimester placental specimens between 9 and 12 weeks" gestation and twenty 3rd trimester placentae between 38 and 40 weeks" gestation were collected following termination of pregnancy.

方法选择正常妊娠6-12周的孕妇15例和妊娠38-40周的孕妇20例，采用实时定量逆转录-聚合酶链反应技术(Real Time RT-PCR)检测绒毛和胎盘组织中三种基因的mRNA。

The homogeneous catalysts for selective O-methylation of phenols with DMC are generally organic bases, such as tertiary amines or phosphines, tetrabutylammonium halide and Schiff bases.

酚与DMC甲基化反应的均相催化剂一般选择叔胺、叔膦、季铵盐及Schiff碱等有机碱，多相催化剂为碱金属碳酸盐、沸石、氧化铝及附载有金属盐的氧化铝和煅烧的Mg-Al水滑石。

Benzenediol being oxidated,and the optimum reaction conditions were used in wastewater treatment.(2) The reaction conditions of Electro-Fenton method were studied by /?

2在间歇式反应器中，以对苯二酚为代表物，研究探讨电解芬顿法的反应条件，选择最佳的电解电流、过氧化氢浓度、电解时间等。

Using this method, ten binary nitrides of metals, from active metals to transition metals, are successfully prepared under different conditions.

通过选择不同的反应条件，用该方法合成了从活泼金属（如Li、Mg、La、Ce和Al）到过渡金属（如Ti、Zr、V、Nb和Cr）等10种二元氮化物。

In Group I, catheter was placed into central vein. PCIA solution contained 0.025% morphine. PCIA was commenced with a loading dose (2-5 mg) of morphine. The PCIA pump was set up with a background infusion of 2 ml/h, 1 ml bolus dose and a 15-minute lockout interval. In Group II, four intercostal nervers were freezed (-70 degrees Celsius) for 90 seconds. Pain intensity was measured at differnt time ［1, 4, 8, 12, 24, 48 and 72 hour after operation］ using VAS scoring.

选择80例接受开胸手术的病人，随机分为静脉镇痛组和神经冷冻组，静脉镇痛组行术后病人自控静脉镇痛，后者采用北京库蓝公司JT-1型冷冻治疗仪在关胸前对切口所在肋间及上、下各一肋间和放置胸引瓶所在肋间的肋间神经进行冷冻，以VAS评分判断两组术后胸部切口疼痛情况，并记录不良反应。

Disadvantages: Online reaction to the machine repair rate is high, estimated at Tyco 420 Series machines repairing machines in the market more, please customers and passed the regular merchants choose to buy.

缺点：网上反应机器返修率较高，估计为泰科420系列机器在市场中的返修机较多，请客户认准正规商家选择购买。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。