步法

ICH was induced by the injection of 50 ul autologous blood into the right caudate nucleus, while 50 μl natural saline was injected in the control group. The rats were killed after 6h, 24h, 2d, 3d, 5d and 7d respectively, the morphology changes of nerve cell oncosis and count by electron microscope and the immunohistochemical method and computer image analysis were performed in rats brain by using antibody of VEGF.

采用二步法制备大鼠脑出血模型，脑出血组注入自体血50μl，对照组注入等量生理盐水，分别于6、24h、2、3、5、7d后处死，行HE染色和免疫组化染色观察脑内VEGF表达变化；电镜下观察胀亡细胞形态学变化并计数。

In this article, star-high vinyl content polybutadiene was prepared using a multi-functional organolithium anionic initiator by " one-step " process. On the basis of 250ml glassware experiment ,we improved the experiment in 2L metal kettle. The polymerization condition was got as follows: polymerization temperature : 50-60 ℃, monomer content : 8-llg/100ml, polymerization time : 3~4 hours.Chracterizations were carried out by 'H-NMR, IR and GPC.

本文首次采用多官能团有机锂引发剂一步法合成出了星型高乙烯基聚丁二烯，在250ml玻璃瓶的基础上，进行2L金属斧的扩大实验，确定了以下聚合工艺参数：聚合反应温度：50～60℃，单体浓度：8～11g／100ml，聚合反应时间：3～4小时。

The reaction of cyclic b-keto esters with CF3CO2ZnCH2I provides the corresponding ring-expanded products with the advantage of mild condition in moderate to good yields. A simple and efficient procedure has been developed for a variety of 1,3-diketones converted into the corresponding 1,4-diketones and trans-1,2-disubstituted cyclopropanols in high yields. In conclusion, this new type of organozinc reagents has been developed for many useful reaction in organic synthesis.

利用有机锌试剂所具有的双重特性，在新型的Baylis-Hillman反应中，可以直接与炔基酮和醛反应一锅制得多官能团的三取代的顺式烯；在b-酮酯化合物的扩环反应中，取得了重要进展，得到了增加一个碳的扩环产物，&一步法&合成，反应条件温和、环境友好；在1，3-二酮分子中成功地插入1个碳，合成出1，4-二酮和环丙醇，为现代有机合成提供了新的合成方法，具有良好的应用前景。

After 100 h thermal exposure at 1050 ℃, the surface Al2O3 scales are continuous, dense, and only very little amounts of alloy elements diffused from the substrate is detected in the overlayer.

一步法制备能提高含扩散阻挡层多层体系的界面结合强度， DB在恒温和循环氧化过程中能保持很好的抑制元素扩散的能力。

We immobilized carbonic anhydrase onto the surface of membrane oxygenator of polymethyl pentene to enhance the removal of carbon dioxide in blood by two steps.

采用两步法将碳酸酐酶共价键合在聚甲基戊烯(Polymethyl-pentene， PMP)膜式氧合器表面以提高其清除血液中CO2的能力。

With industrial monomer solution of dimethyldiallylammonium chloride as raw material, ammonium persulphate as initiator and Na_4EDTA as chelating agent,using the methods of adding initiator all at once,graduated increasing of temperature and stepwise initiation and polymerization,the polymerization process of preparing poly-dimethyldiallylammonium chloride was researched.

以一步法工业单体二甲基二烯丙基氯化铵为原料，以过硫酸铵为引发剂，采用一次性加入引发剂，梯度升温，分步引发水溶液聚合反应的方法，对制备聚二甲基二烯丙基氯化铵的聚合反应的工艺进行了优化研究。

The effects of PESA on CaCO3 scale diameter and scale shape were investigated by size distribution measurement and SEM respectively.

以顺丁烯二酸酐为原料一步法合成了聚环氧琥珀酸，并对产物进行了IR和13C NMR表征。

A one-step reverse transcription loop-mediated isothermal amplification assay was developed for rapidand sensitive detection of peste des petits ruminants virus.

本研究采用一步法反转录环介导等温扩增技术建立了一种快速、灵敏、高度特异的检测小反刍兽疫病毒的方法。

By two steps, the material is obtained by the method that polyhydric alcohol, diisocyanate and a diatomic alcohol chain extender with 8-18 C-structural branch chains are mixed and poured into a polyurethane elastomer that achieves a damping effect through the combination and dissociation of a hydrogen bond between the branch chain and the main chain for consuming energy.

该类材料是通过两步法将多元醇、二异氰酸酯和带有8～18个C结构支链的二元醇扩链剂混合浇注成聚氨酯弹性体，通过支链与主链之间氢键的结合与解离消耗能量，起到阻尼效果。

Considering the low corrosiveness of polyphosphoric acid to the stainless steel,the combustion chamber,which was made of stainless steel without inner lier,was used in the two-step method process.

利用多聚磷酸对不锈钢的低腐蚀特性，在二步法工艺中采用无衬里不锈钢燃磷塔。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。