聚丙烯

Methods TGGP was purified from Balanophora japonica Makino by n-hexane and ethyl acetate extraction and column chromatography.

用萃取和柱层析方法分离提纯TGGP，用酶联免疫测定法、天然聚丙烯酰胺凝胶电泳、分子排阻高效液相色谱法检测其抑制HIV gp41六螺旋束结构形成的作用，用细胞－细胞融合方法检测TGGP抑制HIV进入靶细胞的活性。

The organic-nano rare earth light conversion agent with benzenoid and carboxyl structure was synthesized. The polypropylene fluorescent fiber with the ONRELCA was prepared.

合成了含有苯环和羧基的有机稀土纳米发光体，并通过熔融纺丝制备出了聚丙烯荧光纤维。

Di(3,4-dimethyl)benzylidene xylitol as synthesized in the lab from 3,4-dimethyl benzaldehyde and xylitol, and a series of polypropylene samples were prepared based on the amount of the nucleating agent, DMDBX used.

以3，4-二甲基苯甲醛和木糖醇为原料合成1，3-2，4-二（3，4-二甲基）亚苄基木糖醇，将DMDBX作为成核剂使用溶液沉淀法制备DMDBX质量分数分别为0、0.1%、0.3%、0.5%、0.7%、0.9%的聚丙烯样品，采用红外光谱仪、差示扫描量热仪、X射线衍射仪和偏光显微镜等方法，研究了DMDBX对PP结晶结构和结晶性能的影响。

Biaxially oriented means that the polypropylene film is stretched in both the machine direction and across machine direction.

双向拉伸聚丙烯薄膜是在这两个机器方向和跨机器方向拉伸手段。

The factors which affect the average molecular weight of the polymer of AM and DMDAAC were investigated. The optimal reaction conditions are as follows: the concentration of monomer AM was 30%, while DMDAAC was 5%; the reaction temperature was 30℃, the amount of initiators at the low temperature stage was 0.05‰(compared to the weight of the monomers joining the polymerization), while V-50 was 0.025‰, the weight ratio of potassium persulphate to sodium bisulphite is 1:1, the amount of carbamide was 40‰, and complexing agent was 0.05‰, besides, aerate nitrogen gas for 8min, then the high molecular weight polymer (M=1.217×10^7) could be got after 16h reaction.

研究了影响AM与DMDAAC共聚物的平均分子量的因素，得到了优化条件为：单体浓度为30%，DMDAAC与AM摩尔比为5：95，聚合温度为30℃，低温段引发剂用量为0.05‰，K2S2O8与NaHSO3质量比为1：1，偶氮二异丁基脒盐酸盐(V-50)用量为0.025‰，尿素用量为40‰，乙二胺四乙酸二钠(EDTA-2Na)用量为0.05‰，在此优化条件下聚合反应16h后得到分子量为1.217×10^7的阳离子型聚丙烯酰胺。

Acid phosphatase from Branchiostoma beleheri was isolated and purified by ammonium sulfate fractionation,Sephadex G-75 gel filtration and CM-cellulose chromatography under acid condition.

从厦门文昌鱼Branchiostoma belcheri分离提纯酸性磷酯酶(EC3.1，3.2)，进一步经Sephadex G-75和羧甲基纤维素(CM-52)柱层析纯化，获得聚丙烯酰胺凝胶电泳单一纯酶制剂，比活力为351μm/min mg。

The screening was carried out by single strand conformational polymorphorsim : the PCR product precipitation was dissolved in 20μl denaturing and loading buffer (95%+20mMEDTA+ 0.05% bromophenol blue+0.05% xylene cyanol), heat-denatured in 95 ℃ to two single DNA strands.

通过单链构象多态性分析筛查RDS基因突变；沉淀回收的PCR产物以20μl变性上样液（95%甲酰胺+20mMEDTA+0.05%溴酚蓝+0.05%二甲苯蓝）溶解后热变性为两条DNA单链后，上样于8%非变性聚丙烯酰胺凝胶（含5%甘油），700伏电压、4℃电泳16小时。

Polarizing microscopy and differential scanning calorimetry were used to study the effect of carbon fiber on the crystallization of polypropylene.

本文用偏光显微镜和示差扫描量热计方法研究了碛纤维对聚丙烯结晶行为的影响。

Penicillin V acylase from the crude culture filtrate of Fusarium oxysporum FP 941 was purified with a single band on non-denaturing electrophoresis by means of (NH4)2SO4 fractional precipitation, adsorption on, and elution from, celite, ion-exchange column chromatography with DEAE-cellulose, and Sephadex G-200 gel filtration chromatography.

通过硫酸铵沉淀、硅藻土吸附、DEAD-纤维素离子交换层析和Sephadex G-200凝胶过滤，由尖镰孢FP941培养滤液中得到了聚丙烯酰胺凝胶电泳均一的青霉素V酰化酶。

Twenty-three isolates of gray leaf spot pathogen, Cercospora zeae-maydis, collected from growing area of Northern China were clustered based on their soluble protein and isozyme profiles obtained through native PAGE in order to base physiologically the pathogen differentiation at protein or isozyme level.

利用聚丙烯酰胺凝胶电泳技术，对采自北方玉米主产区的23个玉米灰斑病菌菌株进行可溶性蛋白质和同工酶电泳图谱分析及聚类分析，从蛋白质和酶学的多态性水平上分析玉米灰斑病菌的生理分化特征。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。