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While all the phenyl groups in tetraphenylphenyl groups or benzophenanthrene groups are not coplanar. At the same time, by density function theory, the electronic energy gap between HOMO and LUMO frontier molecular orbitals of condensed aromatics are calculated and the Eg of acenaphthenyl groups in C_2 gum is the smallest, which explains the reason why C_2 gum has the best radiation protection effects.

利用甲基三氯硅烷和溴苯的格氏反应合成了甲基苯基二氯硅烷,用核磁分析证实了格氏反应中高沸点副产物为甲基二苯基氯硅烷;通过甲基苯基二氯硅烷和二甲基二氯硅烷的共水解,再裂解而制得含Me_2SiO链节的甲基苯基环硅氧烷混合物,进而利用碱胶开环聚合得到甲基苯基硅橡胶生胶;也可通过甲基苯基二氯硅烷水解所得甲基苯基环硅氧烷D_3~(3Ph、D_4~(4Ph_)与D_4开环聚合制得甲基苯基硅橡胶生胶。

As the composition of the real wastewaters were always very complicated, deficient of single substrate research was obvious, in view of this , we took a deep examination of Alcaligenes faecalis growth and substrates interaction in phenol and m-cresol mixture.

由于含酚工业废水成份的多样性,单一底物的研究具有明显的局限性,因此,本课题进一步考察了粪产碱杆菌在苯酚和间甲酚混合双底物生物降解系统中的细胞生长及底物降解特性。

Study on cobaltous recovery from cathode leachate of lithium-ion battery by salting out ;2. Then further study was made on extracting pectin from the orange skin by means of salting out with mixed salt for the best condition investigation.

通过浸取、碱溶依次从柑橘皮中提取出橙黄色素、橙皮甙后,利用混合盐析的方法进一步做提取果胶的研究与探讨,对提取果胶的最佳条件进行摸索,并测定这种物质的含

Four new salicylaldehyde derivatives with a glucose or mannose moiety were synthesized with 2-tert-butylphenol or 4-tert-butylphenol as the starting material, followed by the formylation, chloromethylation, nucleophilic substitution reaction with the desired carbohydrate. The salicylaldehyde derivatives condensed with ethylenediamine to give the Schiff bases, which coordinated with Mn to afford four novel sugar-based Salen Mn complexes.

首先,分别以2-叔丁基苯酚和4-叔丁基苯酚为起始原料,经过甲酰化反应、氯甲基化反应、和糖类衍生物的亲核取代反应制得了四种新型并入葡萄糖基或甘露糖基的水杨醛衍生物,将它们与乙二胺缩合生成希夫碱配体,得到的配体与过渡金属Mn~(3+)配位制备出四种新型含糖基的Salen Mn配合物。

Results: The optimal preparing process is: making Panax to be powder; extracting Rheum and Coptis respectively with ethanol; decocting Astragalus, Hirudo and Polyporus with water; then making all the extractions to be powder and mixing with Panax powder, then putting them into capsules. The content of Ginsenoside 〓 in one capsule should be not less than 0.235mg. Panax and Coptis are the main compositions that make Liuwei Tangshen Capsule reducing the blood sugar.

结果:确定最佳制备工艺为:人参粉碎成细粉,黄连、大黄分别用乙醇提取,黄芪、水蛭、猪苓三药用水共煎,各提取物干浸膏细粉与人参细粉混匀,装胶囊;有效成分含量的控制标准为:每粒胶囊中含人参皂苷〓不低于0.235mg;人参、黄连是六味糖肾胶囊发挥降糖作用的主要药味;六味糖肾胶囊中小檗碱在动物体内的分布和消除速度均较适中,但病理模型动物与正常动物相比吸收较差。

In recognition of its important value in ion-selective electrode study, this thesis aims to develop new types of carriers. Metallorganic compounds, Metal-Schiff base complexes, heterocyclic nitrogen compounds, derivatives of calixarene,Sudan Ⅰ and dialkyldithio phosphate have been tested as carriers for all kinds of ions.

鉴于新型载体的开发在离子电极研究中所具有的重要价值,本文主要开展了这方面的一些研究工作,重点考察了金属有机化合物、金属希夫碱配合物、含氮杂环化合物、杯芳烃、苏丹Ⅰ以及双硫代磷酸脂衍生物等各类物质用作离子载体的可能性。

By spraying polyamines synthesis inhibitors, D-Arg, MGBG (Methylglyoxal bis-guanylhydrazone) and CHA at various concentrations to panicles and flag leaves of indica rice Jinlingxiangnuo (a higher polyamine rice variety) at heading, flowering and grain filling stages, changes in contents and components of PAs in rice grains after harvest were investigated.

多胺(polyamines, PAs)是生物体代谢过程中产生的具有生物活性的低分子量脂肪族含氮碱,是调控生物体生长发育的重要活性物质[1]。PAs在生长发育、细胞增殖、肿瘤发生、编程性细胞死亡(programmed cell death, PCD)、免疫反应及食物过敏症等方面具有重要调节作用[2~6]。

The stainless steel has the resistance air oxidation ability---Namely the rustless property, simultaneously also has in contains the acid, the alkali, in the salty medium is corrosion ability---Namely corrosion resistance.

不锈钢具有抵抗大气氧化的能力---即不锈性,同时也具有在含酸、碱、盐的介质中乃腐蚀的能力---即耐蚀性。

The stainless steel has the resistance air oxidation ability---Namely the rustless property, simultaneously also has in contains the acid, the alkali, in the salty medium is corrosion ability---Namely corrosion resistance.

具有抵抗大气氧化的能力---即不锈性,同时也具有在含酸、碱、盐的介质中乃腐蚀的能力---即耐蚀性。

The results indicated that an improved 1BL/1RS translocation has Glu-B3 and Yr9 without secalin,and has higher SDS-sedmentation value than common 1BL/1RS translocation.

结果表明,在87份材料中鉴定出了一种新的改良1BL/1RS易位系,该类易位系的特征是:含有来自1RS的抗条锈病基因Yr9、不含黑麦碱、具有Glu-B3基因、比一般1BL/1RS易位系具有明显偏高的SDS-沉降值。

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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。

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