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Cetirizine is an excellent antihistaminic drug , bearing diphenylmethylpiperazine skeleton .

西替立嗪是具有较好疗效的二苯甲基哌嗪类药物之一,近来发现左西替立嗪是有效体。

Objective: To evaluate the protective effect of Ligustrazine bisphenylmethyl piperazine derivatives on ECV-304 cells injured by hydrogen peroxide.

目的:研究川芎嗪二苯甲基哌嗪衍生物对ECV-304细胞氧化损伤的保护作用。

ABSTRACT] Objective: To evaluate the protective effect of Ligustrazine bisphenylmethyl piperazine derivatives on ECV304 cells injured by hydrogen peroxide.

目的:研究川芎嗪二苯甲基哌嗪衍生物对ECV304细胞氧化损伤的保护作用。

Results: Ligustrazine bisphenylmethyl piperazine derivatives showed protective effects on ECV-304 cells injured by hydrogen peroxide, which were more effective than Ligustrazine.

结果:川芎嗪二苯甲基哌嗪衍生物具有对ECV-304细胞氧化损伤的保护作用,其活性比川芎嗪强。

In the buffer solutions with different pH values the swelling characteristics of hydrogels based on SBCS prepared by cross-linking with glutaraldehyde were studied.

以戊二醛为交联剂制备了 N -(2-磺酸基苯甲基)壳聚糖水凝胶,考察了凝胶在不同pH值缓冲溶液中的溶胀行为。

The isocyanate-terminated polyurethane prepolymer was also synthesized form polytetramethylene glycol and 4,4'-diphenylmethane diisocyanate in N,N-Dimethylformamide.

另外,将聚醚双醇与量之4,4'-二苯甲基二异氰酸酯行预聚合反应,形成具-NCO末端基之聚氨基甲酸酯预聚合体。

In this article, we have been investigated that synthesizing and properties of shape memory polyurethane. The shape memory polyurethane was synthesized from PCL diol, MDI(4, 4'-diphenylmethane diisocyanate) and BDO (1,4-butanediol) in this experiment. We analyzed that the effect of differential mole ratio of monomers to synthesized SMPU. Besides, the various concentrations of Nano-silver were mixed with SMPU. Mechanical properties and shape memory behavior of SMPU nanocomposite films were investigated.

本研究目的为藉由改变4,4'-二苯甲基二异氰酸盐(4,4'-diphenylmethane diisocyanate, MDI)/聚己内酯二元醇(polycaprolactone diol, PCL diol)/1,4-丁二醇(1,4-butanediol, BDO)等不同莫耳比制备形状记忆型聚氨基甲酸酯(Shape Memory Polyurethane, SMPU);并探讨改变不同单体莫耳比及添加不同浓度奈米银溶液对其物性及形状记忆性的影响。

Thesis describes our studies on :(1)Manganese initiated oxidative free radical reactions between 2-benzyl-1,4-quinones and dimethyl malonate.

本报告共分为两部分:(1)利用2-苯甲基-1,4-醌类化合物、丙二酸二甲酯与醋酸锰进行氧化性自由基环合反应(式1)。

In addition, the Medical Scientific Committee on the British Government scientists have found that in recent decades to reduce male sperm count and testicular volume of octyl phenol with narrow, double-Fen A and D n-methyl-phthalic acid resin, and these substances are widely used in manufacture of baby bottles, canned food boxes, food packaging bags, such as coating the inner wall.

此外,英国政府医学科学委员会的科学家们发现,近几十年来男性精子数量减少和睾丸体积缩小与辛基苯酚、双芬A和丁基苯甲基酞酸脂有关,这些物质广泛用于制造奶瓶、罐头盒、食品包装袋等的内壁涂层。

Phenylmethylsulfonyl fluoride (174.2 mg/mL), chicken ovomucoid (1000 mg/mL) and soy-bean trypsin inhibitor (1000 mg/mL) could inhibit enzyme activity, which indicated that the enzyme belonged to serine protease group. On plasminogen-free fibrin plates and plasminogen fibrin plates, the fibrinolytic activity had no obvious difference, indicating that the enzyme was a fibrinolytic enzyme which degraded fibrin directly, but not a plasminogen activator which degraded fibrin by activating plasminogen.

此菌株产生的纤溶酶在50℃以下和pH5.0~11.0范围内具有较好的稳定性,最适作用温度为42℃;最适pH值为9.0;Mg2+、Ca2+对此酶有明显的激活作用,而Cu2+能完全抑制酶的活性;174.2 mg/mL的苯甲基磺酰氟、1000 mg/mL的鸡卵类粘蛋白和1000 mg/mL大豆胰蛋白酶抑制剂能完全抑制酶活性,初步说明此酶属于丝氨酸蛋白酶类;体外溶纤作用表明,该酶溶解纤维蛋白的方式是直接溶解,而不是通过激活纤溶酶原。

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Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在,所有的孩子都要在综合学校继续学习,所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地,使人们普遍认识到发展不能以牺牲农业为代价。

Detailed Intrinsic Reaction Coordination calculations were carried out to guarantee the optimized transition-state structures being connected to the related tautomers.

同时,做了详尽的内禀反应坐标计算,以保证所得到的过渡态连接相应的始末异构体。