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Using the methodology of radical cyclizations of α-acylamino radicals with acylsilanes to construct pyrrolizidine, indolizidine and quinolizidine skeletons, we were able to synthesize-Lentiginosine,-Epiquinamide,-Swainsonine and other analogous alkaloids.

本论文是延续实验室利用α-醯胺基碳自由基与矽基酮的环化反应来合成吡咯叻咭啶、吲哚叻咭啶和喹叺叻咭啶等骨架的方法,进而企图合成出-Lentiginosine、-Epiquinamide、-Swainsonine及其它类似的生物碱。

Especially the alloyage technics reatly improved the heat conducting function of cooling wall.

尤其是冷却水管的合金化处理技术,在保证防渗碳效果及微量间隙的同时,使冷却壁整体热阻降低了50%以上,极大地提高了冷却壁的导热性能

SiO vapor is an important precursor for both carbonthermic and aluminothermic reactions. The rate-controlling step is the reaction in which SiO〓 is reduced to form SiO .

研究发现,无论碳热还原或铝热还原,SiO气体是重要的中间产物,SiO〓还原为SiO的反应是整个还原氮化过程的速度控制步骤。

These results suggested that the active component in the conditioned medium of rat granulosa cells from developing follicles may be derived from arachidonic acid.

这些结果显示发育滤泡中的颗粒细胞的状况化培养液中的活性成分可能是来自二十碳四烯酸。

The higher the degree of external hydrogen-donation is, the easier the reaction is.③Thiophenes can be alkylated by the carbonium ion born in the reaction, and they can be polymerized on the strong acid sites.

噻吩类化合物可与反应过程中产生的正碳离子发生烷基化反应;在含有强酸性中心的催化剂上,噻吩类化合物之间还会发生一定程度的缩合反应。

A novel type of composite electrode based on multiwalled carbon nanotubes coated with sheet-like cobalt hydroxide particles was used in supercapacitors. Cobalt hydroxide cathodically deposited from Co(NO3)2 solution with carbon nanotubes as matrix exhibited large pseudo-capacitance of 322 F/g in 1 mol/L KOH.

采用电化学阴极沉积还原Co(NO3)2的方法制备了具有准电容特性的氧化钴电极材料,其比容量达到280 F/g,采用CNTs作为电极基体,在其表面均匀的沉积了纳米钴化镍颗粒并由此制备了氧化钴碳纳米管复合电极材料。

The synthetic process of dialkyl phosphate by reaction of long -chain alcohol with phosphorus oxychloride was studied. The influence of molar ratio of reactants, reaction temperature, reaction time on process of esterification and hydrolysis was investigated too.

研究了以三氯氧磷与正构偶数高碳醇为原料合成磷酸二长直链烷基酯(C10~16-DAP)的工艺条件,考察了物料配比、反应温度和反应时间等因素对酯化反应与水解反应进程的影响,通过正交实验方法,确定了优化的合成工艺条件。

Electrochemical activation was an erosion process of the interwoven graphitic crystallites of glassy carbon.

活化对电极界面的影响实际上是对玻碳表面交织存在的石墨化微晶颗粒的腐蚀。

Gas chromatography, gas-liquid-solid polymer PLOT column, isosteric heats of adsorption

etex碳填充柱中加入1·5%的角鲨烷,通过增加峰的对称性提高了对低分子量碳氢化合物的分辨能力·Bruner等'''首先将石墨化碳黑毛细管柱,用液相改性后制备成石

Though carbohydrate metabolism in induced or natural diapaused eggs was the same, the heredity of the induced diapaused eggs experienced no change. The eggs of next generation were still non-diapaused. This is of significance for long-term conservation of polyvoltine silkworm eggs.

本研究还发现诱导滞育卵的碳水化合物代谢虽然与自然滞育卵相同,但其遗传性并未改变,下一代产下的卵仍然是非滞育卵,这对多化性品种的长期保存有重要意义。

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。