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ObjectiveTo explore the methods of prevention and cure of sun-induced aging dermis, and clarify the mechanism of Ginsenoside Rb1 on sun-induced aging dermis, with the study of expression of matrix metallo preteinases in sun-induced aging dermis fibroblasts' cytoplast, which are cultured in vitro, under the effect of Ginsenoside Rb1 and arotinoid ethyl ester.

目的通过人参皂苷Rb1与芳维甲酸乙酯对皮肤真皮体外培养光老化成纤维细胞胞质内基质金属蛋白酶表达的影响,阐明人参皂苷Rb1对光老化的防治机理,探索光老化的防治手段。

Monkshood can inhibit the gathering of platelet and improve the microcirculation of ischemic tissue simultaneously.

同时人参皂甙能提供能量基质,增加底物水平磷酸化,促进三磷酸腺苷、磷酸肌酸的合成,保护细胞线粒体钙泵活性,减少线粒体膜磷脂降解,保护膜系统完整;附子能抑制血小板的聚集,改善缺血组织的微循环。

The surface hydroxyl group onto magnetic polyvinyl acetate nanoparticles can be obtained by saponification reaction on their surface.

结果表明,磁性聚苯乙烯颗粒与丁二酸酐发生Freidel-Crafts酰基化反应,可以在颗粒表面引入少量羧基;磁性聚甲基丙烯酸甲酯颗粒分别与乙二醇、二缩三乙二醇、聚乙二醇等发生醇-酯交换反应,可以在颗粒表面接枝不同分子链长度的末端羟基;磁性聚醋酸乙烯酯颗粒经过醇解或皂化反应可以获得表面羟基;磁性聚丙烯酸甲酯颗粒通过乙二胺或1,6己二胺的胺解反应可以得到表面氨基,继而与一氯乙酸反应可以引入亚胺二乙酸基团。

Model predictions are qualitatively consistent with experimental observations of regions of the buffer exposed to the highest temperatures,which indicate precipitation of secondary phasesanhydrite ± amorphous silica(opal-CT ± calcite and alteration of Na-smectite to Ca-smectite ± saponite.

模型的预测值能够定性地与高温下缓冲区的观测试验值相吻合,表明次生矿物的沉淀无水石膏±无定形二氧化硅(opal-CT±方解石和由 Na 基蒙脱石变为 Ca 基蒙脱石±皂石的相交替过程。

Sixteen compounds were separated from 80% ethanol extract of Plant A, they were:-lariciresinol,-isolariciresinol,-isolariciresinol 9-O-β-D-glucopyranoside, tanegoside B, apiginin, apigenin 7-O-β-D-glucoside, apigenin 7-O-β-neospheroside, quercetin 3-O-β-D-glucopyranoside, 1, 7-dihydroxy-3, 4-dimethoxyxanthone, 3-O- [α-L-rhamnopyranosyl (1-4 ] -β-D-glucopyranoside-(25S)-5β-spirostan-3β-ol , 3β-O-D-glucopyranoside quinovic acid, mangiferin , 3'-p-hydroxybenzoyl-mangiferin, physcion, benzenyl methanol β-D-glucopyranoside and Vanillic acid.

结果: 1。从植物A的80%乙醇提取物中共分离得到16个化合物,分别为:-落叶松脂醇、-异落叶松脂醇、异落叶松脂醇9-O-β-D-吡喃葡萄糖苷、tanegoside B、芹菜素、芹菜素7-O-β-葡萄糖苷、芹菜素7-O-β-新橙皮糖苷、槲皮素3-O-β-D-吡喃葡萄糖苷、1,7-二羟基-3,4-二甲氧基-口山酮、菝葜皂苷元-3-O-[α-L-吡喃鼠李糖基(1-4)]-β-D-吡喃葡萄糖苷、喹诺酸3β-O-D-葡萄糖苷、知母宁、3′-对羟基苯甲酸-知母宁、大黄素甲醚、苯甲醇-β-D-吡喃葡萄糖苷、香草酸。

The results indicated the best medium for supension co-culture with Daucus carota and Daucus carota is MS, 2, 4-D 2 mg/L, NAA 1 mg/L and KT 0.2 mg/L, after 25 d the polysaccharide content of co-culture reaches the highest level 0.203 mg/g, and the saponin content of co-culture is 1.85mg/g, higher 3.35% than saponin of Panax ginseng culture.

结果表明,人参与胡萝卜悬浮混合培养的最佳基质为MS、2,4-D2mg/L、NAA1mg/L、KT0.2mg/L,在培养25d时混合培养物的多糖含量达到最高,浓度达到0.203mg/g,混合培养物的皂苷含量为1.85mg/g,比人参悬浮培养物皂苷含量高出3.35%。

Glycyrihizic acid can cause the polarigraphic catalytic wave of oxygen. GA scavenging superoxide ion is demonstrated chemically by the catalytic wave at molecular lever.

本文报道的甘草酸及其皂甙类衍生物存在下的氧极谱催化波,从分子水平研究了GA清除超氧离子自由基〓的化学作用机制,证实清除〓的活性基团是GA分子中与C=O基共轭的C=C双键,并非-OH基,纠正了文献观点。

RhaG hydrolyzed only the 6-C α-rhamnoside of ginsenoside Re, RhaR is able to hydrolyze the α-rhamnoside of rutin、hesperidin and naringin.

实验结果表明,RhaG只水解人参皂苷Re的C-6位末端上的一个α-鼠李糖基,而RhaR能水解芦丁、橙皮苷、柚皮苷的α-鼠李糖基。

Spectrophotometer measuring, the total content of caroteinoids in saponified product was 29.22%, and in the crude extract was 5.07%.Using VC-CUSO4-H2O2 system to study its scavenging activity, the result indicated that both the saponified extract and the purified lutein could quench the hydroxyl radical.

采用抗坏血酸一CuZ十一H八一酵母体系产生的经自由基为体外模型,对制备产品清除轻自由基的能力进行研究,结果发现南瓜黄色素的皂化品和纯化碑能有效清除轻自由基,最佳的浓度为0。

The effects of various structure parameters of gemini surfactants such as nature of the hydrophilic head groups,nature and chain length of the hydrophobic tail groups,nature and chain length of the spacer groups,and nature of the counter ion et al.on their dissolution properties,surface activity,micelle morphology,foaming performance and lime soap dispersing power et al.were summarized.

综述了双子表面活性剂亲水头基的性质、疏水尾基的性质及长度、连接基的性质及长度、反离子等结构参数对其溶解性、表面活性、胶束形状、起泡性及钙皂分散能力等的影响。双子表面活性剂是一类新型表面活性剂,具有临界胶束浓度低、表面活性高、增黏能力强等一系列优异性能,这些优良性能使其具有良好的应用潜力。

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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.

然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

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付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。