乙酸乙酯

ABSTRACT:OBJECTIVETo investigate the effects of ethyl acetate extract of the selaginella tamariscina on vasotonia and its underlying mechanisms.

探讨卷柏乙酸乙酯提取物穗花杉双黄酮对血管紧张性的影响及其可能的机制。

MTT assays were used to evaluate effects of ethyl acetate and n-butanol extracts from Selaginella labordei on inhibiting cell proliferation. Flow cytometry was used to detect cell apoptosis rate.

利用MTT法检测细叶卷柏乙酸乙酯和正丁醇提取物对HeLa细胞生长的抑制作用，利用流式细胞术比较不同提取物对细胞凋亡的影响。

Methods: HPCE analysis was carried out on the ethyl acetate extracts of 18 Selaginella plants (from 11 species), using MECC separation model.

采用HPCE的MECC的分离模式，对 18个卷柏属植物样品的乙酸乙酯提取物进行测定。

A nematicidal sesquiterpene was isolated from the ethyl acetate extract of Michelia hedyosperma Law according to bioassay-guided fractionation.

根据活性追踪分离，从香子含笑叶的乙酸乙酯提取物中分离纯化到一个杀线虫的倍半萜。

Results Five compounds were isolated and their structures were identified as crenatoside (1),torachrysone(2), emodin(3),emodin-1-O-β-D-glucopyranoside(4) and β-sitosterol(5) respectively.

结果从黄药地上部分的95%乙醇提取物的乙酸乙酯部分中分离得到了5个化合物：黄药苷(1)、torachrysone(2)、大黄素(3)、大黄素-1-O-β-D-葡糖苷(4)和β-谷甾醇(5)。

Results Five compounds were isolated and their structures were identified as crenatoside (1), torachrysone (2), emodin (3), emodin-1-O-β-D-glucopyranoside (4) and β-sitosterol (5) respectiely.

结果 从黄药地上部分的95%乙醇提取物的乙酸乙酯部分中分离得到了5个化合物：黄药苷(1)、torachrysone(2)、大黄素(3)、大黄素－1-O-β-D-葡糖苷(4)和β-谷甾醇(5)。

C. The quench is performed with aqueous sodium hydrogen carbonate and ethyl acetate.

三是演出的淬火、乙酸乙酯碳酸氢钠水溶液。

In our previous study, we found that the EtOAc extract of the roots contained many oligostilbenes which had multi-faceted bioactivities. Kobophenol A (1) is a stilbene tetramer, accounts for nearly 20% of the EtOAc extract.

我们研究发现金雀根乙醇浸膏的乙酸乙酯部位主要化学成分是二苯乙烯类化合物，具有多样的生物活性。

An experiment was conducted to study the antifeeding effects of ethanol, ethyl acetate and water solutions of linoleic acid, pimelic acid, suberic acid, azelaic acid, and n-nonanoic acid against imago of Pissodes punctatus. Absolute antifeeding rate and relative antifeeding rate were used to appraise the antifeeding effects of organic acids.

为了寻找华山松木蠹象(Pissodes punctatus Langor et Zhang)环境友好的防治方法，研究了亚油酸、庚二酸、辛二酸、壬二酸、壬酸的酒精溶液、乙酸乙酯溶液和水溶液对华山松木蠹象成虫的拒食作用，采用了完全拒食虫率与相对拒食率来评价有机酸的拒食效果。

The analysis methods for the determination of micro or trace elements in high moisture jellyfish were developed. The fatty acid compositions in difderent parts of fresh jellyfish were determined by GC/MS method. Thirty-five fatty acids were identified, and most of them were found in R. esculentum jellyfish for the first time. Especially, two unusual very long chain polyunsaturated fatty acids that were never detected in the other jellyfish also were determined. Amino acids were abundant in R. esculentum jellyfish, especially containing sulfur amino acids, and could be supplied for human diet. The polysaccharide in umbrella part of jellyfish was composed of glucose, galactose and uronic acid, and its molecular weight was 40,000, but the polysaccharide of the oral arms part consisted of glucose, mannose and glycuronic acid, and its molecular weight was 43,000. Above-mentioned data were never reported. The ethanolic extract of oral arms part of jellyfish were extracted by different polar solvents (petroleum ether, acetic ether, n-butanol), and antibacterial activity was tested to these extracts by four species of terricolous pathogenic bacilli and three species of botanic pathogenic fungi. The result demonstrated that the petroleum ether extract had certain bactericidal activity for two species of pathogenic bacilli, and n-butanol extract had certain inhibited activity on apple rot pathogenic fungus.

建立了 高含水量的海蜇产品中微量、痕量元素成分测定的分析方法；采用 GC/MS 方法测定了新鲜海蜇不同部位的脂肪酸组成，共鉴定出 35 种脂肪酸，其中大多数脂肪酸是首次在海蜇中被检测到，尤其是两种不常见的 C24：5 超长链多不饱和脂肪酸的分析和鉴定在其它水母种属中也从未见报道；海蜇三个部位中氨基酸成分齐全，含量丰富，含硫氨基酸含量较高，可与其它食物蛋白质的氨基酸互补；其中海蜇皮多糖是由葡萄糖、半乳糖和糖醛酸组成，分子量为 40，000，海蜇头多糖是由葡萄糖、甘露糖和糖醛酸组成，分子量为 43，000，以上工作均未见报道；利用石油醚、乙酸乙酯、正丁醇三种不同极性溶剂分别萃取海蜇头乙醇浸提物，用纸碟法和生长速率法分别对四株陆源病原菌和三株植物病原真菌进行了抑菌实验，结果表明海蜇头石油醚提取物和正丁醇提取物具有一定的抑菌活性。

The X-ray diffract was used to analyze the crystal structure of the composite. Results show that after the talc was treated with blend coupling agent, the crystal structure of talc changed, and effect Intercalation phenomenon.

通过X射线衍射分析可知，用混合偶联剂对滑石粉进行预处理后，滑石粉晶体结构发生改变，产生了插层现象，使PP／滑石粉复合材料为纳米复合材料。

An authentic Maui wedding might require the services of a 'kahu', which is a Hawaiian minister.

毛伊可能需要一个真实婚礼服务'kahu'，这是夏威夷部长。