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The epoxidation of of various olefins was carried out using LDH-F with Mg/Al=5 as the catalyst and H2O2 and benzonitrile as the oxidants. This catalytic system has excellent catalytic activity. The conversion and selectivity are both above 95% when using styrene, indene, allyl alcohol, and allyl chloride as the substrates.

以Mg/Al=5的LDH-F为催化剂,H2O2和苯甲腈为氧化剂对不同官能团化烯烃进行环氧化反应,结果表明,此催化体系具有良好的催化性能,在苯乙烯、茚、丙烯醇和烯丙基氯环氧化反应中转化率和选择性均在95%以上。

Its beneficial widespread effect on health is attributed to sulphur compounds and particularly to thiosulfinates. Odorless and stable, alliin is the most abundant sulfur compound in whole, unbruised Garlic. When the clove of garlic is cut or crushed, the enzyme alliinase is released from its compartment and transforms S-allyl-L-cysteine sulfoxide or alliin into diallyl thiosulfinate allicin, the characteristic compound of garlic flavor. This very unstable thiosulfinate is rapidly degraded to related organosulfur compounds. Allicin is often thought of as the "active ingredient" in Garlic, and has been the subject of numerous scientific studies, but its a fairly unstable compound that likes to react with itself.

蒜氨酸(S-烯丙基-L-半胱氨酸亚砜,alliin)是完整、未受损大蒜里面含量最丰富的硫化物,并且非常稳定,它存在于大蒜的细胞质里;当细胞受损时,蒜氨酸酶从细胞液向细胞质释放,蒜氨酸和蒜氨酸酶接触被迅速转化为一系列新的化合物—蒜辣素及其相似物,蒜辣素(双烯丙基硫代亚磺酸酯,allicin)被认为是大蒜中最重要的活性成分,但它相当不稳定,易于自身反应。

The terminal allylation reaction was studied which was influenced by reaction time, reaction temperature, category and dosage of allylation reagent and molecular weight of polyether.

其次对双羟基聚醚的端烯丙基化反应进行研究,讨论了反应时间、反应温度、聚醚分子量、烯丙基化试剂的种类和用量对反应的影响。

With industrial monomer solution of dimethyldiallylammonium chloride as raw material, ammonium persulphate as initiator and Na_4EDTA as chelating agent,using the methods of adding initiator all at once,graduated increasing of temperature and stepwise initiation and polymerization,the polymerization process of preparing poly-dimethyldiallylammonium chloride was researched.

以一步法工业单体二甲基二烯丙基氯化铵为原料,以过硫酸铵为引发剂,采用一次性加入引发剂,梯度升温,分步引发水溶液聚合反应的方法,对制备聚二甲基二烯丙基氯化铵的聚合反应的工艺进行了优化研究。

The results show that the brominated reaction is complete in 1.5 initial contact minutes,an...

结果表明,丁基橡胶的溴化过程只在最初的1.5min内,随着反应时间的延长及在碱性条件下反应,发生了分子结构的重排,即由溴代仲位烯丙基结构向更稳定溴代伯位烯丙基结构转移。

A novel chiral diallylic diamine has been synthesized through double addition of allyl zinc bromide to chiral imines in this contribution.

通过烯丙基溴化锌对手性亚胺的两次不对称加成,合成了光活性的双烯丙基化的新型手性二胺。

Results: expression of inos proteins was seen on day 1 following the control stent implanting, developed on day 3, peaked on day 10 and lasted till day 28. inos expressions at all time points in diallyl trisulfide coated stent group were higher than those in control stent group. compared with normal blood vessel tissue, the no production after stenting decreased on day 1, increased on day 3, maximized on day 10, went down to its pre stenting level on day 28. at all time points, no levels in allitridi stented sites were higher than those in control stented sites.

结果: 对照支架组术后1 d血管壁中有少量inos蛋白表达,3 d表达增加,10 d达高峰,28 d时仍有表达,二烯丙基三硫化物涂层支架组inos蛋白在各时间点的表达量均高于对照支架组;对照支架组术后1 d时no生成量低于正常组织,3 d时no水平升高,10 d时最高,28 d时降至基线水平,二烯丙基三硫化物涂层支架组各时间点的no水平明显高于对照支架组。

In addition, 65% ee was obtained for 1, 3-dimethylprop-2-enyl acetate. Interestingly, the reactivities of these ligands are all very high.

对于1, 3-二苯基烯丙基醋酸酯的烷基化和胺化反应, ee 值最高分别为93%和98%,此外,在对1, 3-二甲基烯丙基醋酸酯的烷基化反应中 ee 值最高也可达65%。

In this paper,the physical propertites and reactivity of allyl xy lob resin are introduced, and a new matrix resin— allyl xylok /BMI resin system is showed.The properties of this resin system and its fiber reinforced compression moloding materials.

文中论述了烯丙基新酚的物性和反应性,研究了烯丙基新酚/BMI树脂体系以及用它制成的玻璃纤维压塑料的性能,如反应性、力学性能、韧性、耐热性、耐湿热性和绝缘性能等。

A new train of thought of copolymerising modification of the boron phenolic resin was applied and a new resin contained allyl was synthesized through allyl phenol, phenol, boric acid and polyformaldehyde.

运用硼酚醛树脂共聚改性的新思路,利用烯丙基苯酚、苯酚、硼酸、多聚甲醛等合成出结构中含有烯丙基活性基团的可与其它含不饱和双键树脂发生共聚反应的新型硼酚醛树脂,表征了它们的物理性能和结构。

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