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The reaction of iodide-potassium iodide was negative to evaluate that EGP was nonstarch polysaccharides, ulfate was 11.92%, content of the total polysaccharide was 83%, mainly including 70.13% D-galactose and 17.95% 3,6-anhydro-galactose.

不溶于有机溶剂,碘-碘化钾反应呈阴性,说明提取物为非淀粉性多糖,产率为20%,总硫酸基含量11.92%,总糖含量83%,主要由70.13%的D-半乳糖和17.95%的3,6-内醚半乳糖组成。

Meantime, we further studied this reaction under microwave irradiation conditions and first introduced the concept of the solvent-free and no-catalyst in this reaction, expanded the olefination of organozinc halides reagents with aldehydes, enlarged the application scopes of this reaction.

同时在微波辐射条件下进一步研究了该类反应,并在该类反应中初步引进无溶剂、非催化的概念,扩展和完善了有机卤化锌试剂与醛的烯基化反应,扩大了其应用范围。

In this method, titration with standard solution of perchloric acid in glacial acetic acid was used.

建立了在非水条件下快速测定食品中糖精钠的方法,以冰乙酸为溶剂,用高氯酸的冰乙酸标准溶液滴定,经过反复试验,相对标准误差0.92%~2.93%,加标回收率97.13%~100.3%,结果表明;该法定量分析准确,精确度高,可靠性和重现性好。

In aprotic solvents magnesium effects pinacol reductive coupling of aldehydes and ketones.

在非质子性溶剂,镁对频纳醇与醛和酮的还原耦合反应也有一定效果。

Using one chiral ligand of each type respectively to investigate the infection of the structure and the amount of chiral ligands, the structure of reactant, the temprature and duration, solvent and reductive metal in pinacol coupling reactions.

三、系统考察了手性配体的结构和用量、底物结构、反应温度、时间、溶剂及还原金属对Pinacol偶联反应的化学产率、非对映选择性和对映选择性的影响。

The electrolyte, which is different from the conventional electrolyte of the ethylene-boric acid system, consists of ethylene, dimethylformamide, ammonium hexandioic and polyhydric alcohol but water.

它是以乙二醇和二甲基甲酰胺为主溶剂,以己二酸铵为溶质,以多元醇为热稳定剂的非水系工作电解液。本文对新型工作电解液和一般工作电解液进行了比较。

It is discovered that isomerization of 2,10-epoxypinane produce mainly perillyl alcohol in 353 ~ 363 K catalyzed by acid catalysts in strongly polar protonic solvent.

结果表明:在酸催化剂存在下,强极性非质子溶剂中,2,10-环氧蒎烷于353-363 K可定向重排生成紫苏醇。

Compared with non-nanopolyaniline synthesized by conventional emulsion polymerization, nanopolyaniline has the narrow and uniform distribution of particle dimension and the diameter of particle is about 4-5nm,and the conductivity reaches 3.2S·cm-1, which is more than 100 times higher than that of nanopolyaniline;Moreover, it has higher solubility in conventional solvent and the solubility reaches 95% in N-methyl pyrrolidone;what's more ,it has higher crystallinity and more uniform crystal proved by XRD, apparent blue shift indicated by UV, which makes it possible to prepare transparent conductive composite films.

结果表明,微乳液法合成的纳米聚苯胺与常规乳液法合成的非纳米聚苯胺相比,具有明显的优越性:粒径分布窄,95%的在10nm 以下,最大的不超过30nm;电导率较高,达到了3.2S/cm,提高了2 个数量级以上;在有机溶剂中的溶解度较高,其中在N-甲基吡咯烷酮中的溶解率达到了95%;X 射线衍射仪分析表明,纳米聚苯胺结晶度高,晶型更为规整;紫外可见光谱研究发现,纳米聚苯胺在可见光区有明显的蓝移,为制备透明的导电复合膜提供了可能。

One-step extraction with polar and nonpolar mixed solvents was a method of effective comprehensive extraction for antioxidant and essential oil of rosemary (Rosmarinus officinalis L.). The method was simple on operation and was easily put into practice.

极性和非极性混合溶剂一步提取法是迷迭香抗氧化剂和精油综合提取的有效方法,操作简单,容易实施。

And the healing agent containing both multiply vinyl group and double SiH bonds was prepared by reducing the oligomer by lithium aluminum tetrahydride.,dichloropolymethylvinylsiloxane was prepared by hydrolyzing partially of MeViSiCl2 under nitrogen protected in ether.

甲基乙烯基二氯硅烷在氮气保护下,以乙醚为溶剂进行非充分水解,得到,二氯聚甲基乙烯基硅氧烷,再经过LiAlH4还原可得兼有多个乙烯基和两个SiH键的自修复单体。

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