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Instead of environmentally toxic chromium oxidant, singlet oxygen generated photochemically was used as environmentally friendly and benign oxidizing agent to accomplish the transformation of pseudodiosgenin diacetate to diosone efficiently in a low toxic and less expensive solvent acetone.

裂解薯蓣甙元所得的假薯蓣甙元,在低毒且廉价的丙酮溶剂中,在光敏剂和光的存在下,与氧气反应,得到的产物再经酸解消除反应得到合成其它多种甾族药物的重要前体16-脱氢孕烯醇酮醋酸酯。

The method of two-step acid hydrolysis for extracting diosgenin from D. zingberensis wright was studied with orthogonal tests. The experimental results show that the raffinate of diosgenin is up to 2.41%, has improved by 9.55% than the method of direct hydrolysis (2.20%).

采用正交实验的方法,探讨了经过二次酸水解法从黄姜中提取薯蓣甙元的工艺条件,结果表明该方法提取的薯蓣甙元产率达到了2.41%,比直接水解法(2.20%)提高了9.55%。

The result indicated that it was not easy for PNS alone to penetrating the skin of isolated nude mice, but 1% and 3% volatile oil of Ramulus Cinnamoni possessed the promoting action on percutaneous absorption of PNS.

结果:单纯的三七总苷难以透过裸鼠离体皮肤,1%、3%浓度桂枝挥发油对三七总苷的透皮吸收均有促进作用。

The effect of volatile oil of Ramulus Cinnamoni on percutaneous absorption of Panax notoginseng saponins was studied on the skin of isolated nude mice, with ginsenoside Rg1 as the index, HPLC methodand Valia-Chien horizontal diffusion cell were used.

采用离体裸鼠皮肤,以人参苷Rg1为指标,应用Valia-Chien水平扩散池和HPLC检测法,考察桂枝挥发油对三七总苷透皮吸收的影响。

Thus, saponifiable lipids and whole wood cannot be used for isotopic analysis in stable isotope dendroclimatology.

因此,树轮可化类脂的碳同位素组成(恐怕也包括氢、氧同位素组成)不能用来解译过去气候变化,全木因为含有可化类脂也不宜作为稳定同位素分析的目标物质。

The encapsulated TiO〓 particles by polymer were obtained with soapless emulsion polymerization of methyl methacrylate in water in the presence of the pretreated TiO〓 particles.

一种是用偶联剂钛酸丁酯对亲水性TiO〓粒子进行预处理,钛酸丁酯与TiO〓表面羟基反应,交联到TiO〓粒子表面,使TiO〓粒子表面由亲水性转变为憎水性,改善无机粉体与有机单体的亲合性,再进行TiO〓存在下甲基丙烯酸甲酯的无乳液聚合,即可得到TiO〓-PMMA复合粒子:另一种方法是用表面活性剂对TiO〓进行预处理,再进行TiO〓粒子存在下甲基丙烯酸甲酯的无乳液聚合,TiO〓粒子表面可形成一层均匀的聚合物膜,提出了包覆机理,指出单体在无机粉体表面发生聚合的关键是预先在粒子表面形成聚合场所,即吸附一层表面活性剂。

He stared at the small flower on the tip of the karnikāra outside the windows. This was his second assumption: He felt that this tasteless and gorgeous life, like the milky liquid excreted by the body was now flowing in his wife's stomach. He imagined that perhaps he was already inside the stomach of this stuporous woman sleeping next to himself, staring at the karnikāra flowers.

他把视线停留在窗外的牙树梢的那枝小花朵上,这是他的第二个假设;他觉得这个无味艳丽的生命,亦如体内排泄的乳色液体,如今在妻子腹内飘曳,他想或许自己已在身旁这个昏睡的女人的腹中,凝视牙花朵。

The best technology of purified lycopene oil resin was, lycopene oil resin:Trimethylene glycol:Potassium hydroxide:Water 3.5:4.5:1.5:1.5,saponification temperature 70℃, saponification time 2h. The content of lycopene is 3.4%, extraction rate is22.48%.

较优的工艺条件为,番茄红素油树脂:丙二醇:氢氧化钾:水的比例为3.5:4.5:1.5:1.5,化温度为70℃,化时间2小时,所得番茄红素的含量为3.4%。

The fatty oil from the seeds of M. cochinchinensis was extracted with petroleum ether, and the saponification was carried out with potassium hydroxide. The unsaponifiable matter was isolated and purified by silica gel column chromatography, and the structures of their constituents were elucidated by means of IR, MS, 1H-NMR, and authentic chemicals.

石油醚提取脂肪油,氢氧化钾进行化反应,对不化部分进行硅胶柱色谱的分离和纯化,用IR,MS,1H-NMR等波谱技术和对照品对照等方法进行化合物的结构鉴定。

The results show that the crude fat in corn bran is 5.99%, the protein is 4.86%, the crude fiber is 12.45%. The physico-chemical indexes of corn bran oil are as following: d(superscript 20℃ subscript 4℃) 0.9135, IV 112.4gI/l00g, SV 189.1mgKOH/g, unsaponifiable matters 3.75%. The fatty acid composition of corn bran oil is: oleic acid 30.27%, linoleic acid 54.14%, palmic acid 13.68%, stearic acid 1.14%.

结果表明,玉米皮粗脂肪含量为5.99%,粗蛋白质4.86%,粗纤维含量为12.45%;玉米皮油的相对密度0.9135,化值189.1mgKOH/g,碘值112.4gI/100g,不化物3.75%;玉米皮油脂肪酸组成中,油酸30.27%,亚油酸54.14%,棕榈酸13.68%,硬脂酸1.14%。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。