反应素

The effects of different catalysts, mole ratio of glyoxalic acid and urea on yield of allantoin are investigated.

以乙二醛、硝酸、尿素为原料，通过二步合成得到尿囊素，主要考察了缩合反应中，使用不同催化剂催化缩合尿囊素的收率对比及影响因素。

Methodological furan and reaction of Diels-Alder of course of Ma Lai anhydride are generated go armour goes element of hydrogenous Chinese blister beetle, reductive below palladium charcoal catalysis into go element of armour Chinese blister beetle, with replace aniline condensation to become nitrogen - phenyl goes acyl of armour Chinese blister beetle inferior the ramification of amine.

方法呋喃和马来酐经过Diels-Alder反应生成去甲去氢斑蝥素，在钯炭催化下还原成去甲斑蝥素，和取代苯胺缩合成氮-苯基去甲斑蝥酰亚胺的衍生物。

According to results of cantharidin structure-activity relationships, a series of cantharidin derivatives for the first time were designed, synthesized and characterized by IR, NMR and elemental analysis.

用IR、〓H NMR初步证实了斑蝥素衍生物和DCC生成稳定中间体是使含有芳香羧酸的斑蝥素衍生物与氨基葡萄糖及其衍生物不能进行反应的主要因素。

The reaction results showed that the complex ctalytic system consisted of ethanol and a kind of promoting agents was very effective to hydrogenate selectively avermectin into ivermectin.

研究结果表明，在合适反应温度和压力的两相催化体系中，阿维菌素的转化率可以达到99%以上，生成伊维菌素的选择性高于95%。

Results (1)LVMI gradually increased from 5d to 30d in OG (P＜0.01);(2)Counts of intracardiac bFGF immune reaction and bFGF mRNA expression were increased at 5d, were essentially normalized at 30d;(3) Intracardial ACE activity, angiotensin II concentration, ACE protein and ACE mRNA expression were progressively risen from 0.5 h or 4 h to 30 d;(4)LVMI was positively correlated with the level of ACE protein and ACE mRNA expression following 5d.

2OG中心肌bFGF免疫反应特异性染色强度增加，半定量显示5天升高(P＜0.05)，30天基本恢复正常(P＞0.05)；bFGF mRNA表达1天升高(P＜0.05)，其后类似bFGF。(3)心肌血管紧张素转换酶活性和血管紧张素Ⅱ水平在术后0.5小时即升高(P＜0.05)，4小时明显增高(P＜0.01)，峰值在30天；心肌ACE蛋白及ACE mRNA表达均在术后4小时明显增高(P＜0.05或＜0.01)，其后逐渐升高，峰值在30天；5天及其后，LVMI与ACE蛋白及ACE mRNA表达数量呈正相关。

Sheep embryo with high-purity,high-quality and high security features to extract the cells from the completion of the injection can be divided into three phases:-Using the most advanced chemical and biological equipment from sheep embryos to extract the liver activity of the protein and remove impurities,heat-sensitive eggs White matter and may result in allergic reactions of various types of risk factors-The adoption of advanced technology to extract the cells separated,thus the effectiveness of different cells,such as chest Gland cells,placental cells,liver cells and so on dozens of different types of-Using the most advanced technology to maintain the freeze-dried cells of live sheep-embryo for the first time the use of only afew hours to keep The cell activity,and now,with the continuous development of science and technology,after the extract ion of the cells have been able to keep to five years.

羊胚胎素具有高纯度、高品质和高安全性的特点，从细胞的提取到针剂的完成可分为三个阶段：-运用最先进的生化磁粉探伤仪，从小羊胚胎的肝脏中提取活性蛋白质，并去除杂质、热敏感蛋白质及可能导致过敏反应的各类危险因子-通过先进的技术对提取的活性细胞进行分离，从而得到具有不同功效的活性细胞，如胸腺细胞、胎盘细胞、肝脏细胞等几十种不同类型-采用目前最先进的冻干技术来保持细胞鲜活性，羊胚胎素在最初使用时只能保持几小时的细胞活性，而如今，随着科学技术的不断发展，提取后的细胞活性已经可以保持到5年。

Dimethyl carbonate was used as the methylating reagent, o-vanillin as the material and K2CO3 as the catalyzer to synthesize oV. The effect of material ratio, reaction time, reaction temperature and catalyzer dosage on its synthesis reaction was investigated.

方法］采用碳酸二甲酯作为甲基化试剂，以邻位香兰素为原料，无水碳酸钾为催化剂，合成邻藜芦醛，研究物料配比、反应时间、反应温度和催化剂量对反应的影响。

In particular, an investigation was carried out into the different temperatures used on the degradation of sugars and amino acid and the extent of accumulation of browning intermediates, such as Amadori product, organic acid, brown pigment formation and pH changes.

研究了在不同反应温度(80、100、120℃)和不同反应时间下，体系中糖和氨基酸的降解程度，反应中间体：阿利德诺和有机酸的累积程度，类黑素的形成及pH变化程度。

This result was close to that obtainedin the reaction systems containing both acid and halide additives under the samecondition.

在283 K反应4小时之后，乙醇溶剂中H_2O_2的浓度可以达到1.1％，该结果与目前报道的相同反应条件下液相共存酸和卤素助剂的催化剂体系的H_2O_2生成能力相接近。直接合成H_2O_2反应中得到的H_2O_2浓度相接近。

Bromo-2-sulfolene (2) reacted with substituted benzoic acid salt s 3a～3c or alizarin yellow (3d) to give four novel allylic substitution products 4a～4d by esterification reaction, respectively.

以3，4-二溴环戊砜(1)为原料，在无水吡啶作用下发生消除反应，得到反应中间体4-溴-2-环戊烯砜(2)，再分别与一系列取代苯甲酸盐3a～3c以及茜素黄GG(3d)发生酯化反应，合成出4种新环戊烯砜衍生物4a～4d，并用IR，1HNMR，MS，元素分析等表征了它们的结构。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。