查询词典 ethyl acetate

Chemical constituents in ethyl acetate fraction of alcoholic extract from the flower of Bombax malabaricum DC .

采用GC-MS对木棉花醇提物乙酸乙酯溶解组分的化学成分进行了研究，共鉴定出46种成分。

The ethanol extract and ethyl acetate extract of Capparis Spinosa have the effect against skin fibrosis.

槌果藤乙酸乙酯提取物、乙醇提取物具有抗皮肤纤维化作用。

Results On week 2, 4, 6, the thickness of dermis was 23.22, 24.94, 19.97 μm respectively in mice treated with ethanol extract of Capparis Spinosa, 27.66, 26.15, 22.13 μm respectively in those treated with ethyl acetate extract of Capparis Spinosa.

目的 观察槌果藤乙酸乙酯提取物、乙醇提取物对硬皮病小鼠模型真皮厚度、Ⅰ型、Ⅲ型胶原合成及转化生长因子-β1表达的影响。

The synthesis of the intermediate amidetriazinone was a crucial step in the synthesis of triazinone. Ethyl acetate was used as the initial material then was carried out for five steps hydrazine hydrate, triphosgene, chloroacetone, hydrazine hydrate respectively with the yield of 59.8%.

三嗪酮类化合物的合成关键是中间体氨基三嗪酮，本文以乙酸乙酯为起始原料，经过酯的肼解、成环反应、胺的烷基化、酮和肼的缩合、酰胺的水解五步反应合成中间体氨基三嗪酮，其收率达59.8%。

METHODS:(1) Ethanol extraction and ethyl acetate purification were used to extract isofiavones from Cicer arietium L.. Orthogonal design was used to optimize the better Ethanol extraction conditions.

(1)以新疆地产鹰嘴豆为原料，经脱脂，乙醇提取，乙酸乙酯萃取，得到总异黄酮，采用正交试验优选出最佳工艺。

The emphasis was on chemical properties,application,main production methods,market,and prospects of main deriva- tives of acetaldehyde such as ethyl acetate,pentaerythritol,glyoxal,peracetic acid, crotonaldehyde and pyridine.

介绍了国内外乙醛及其主要衍生物的生产技术发展及其市场供需状况，尤其对乙醛主要衍生物乙酸乙酯、季戊四醇、乙二醛、乙醛酸、丁烯醛、吡啶的化学性质与用途、主要生产方法、市场供需状况及开发前景作详细介绍和分析。

The results showed that the ultrasonic extraction is a rather ideal method of extracting red P. tha fortuneana pigment. Cyanidin3glucoside can be hydrolysised to aglycon cyanidin under the conditions of 90℃, 9％HCl and 11min.Silica gel thinlayer chromatography with developping agent benzene∶ethyl acetate∶formic acid = 2∶2∶1 is better to separate cyanidin. Cyanidin is stable to heat and light, unstable to Zn2+ and Fe3+ and Cu2+, insensitive to Co2+ and Bi3+, befitting to acidic condition.

结果表明，超声提取法是提取火棘红色素的较理想方法；矢车菊素3葡萄糖苷在90℃和9％盐酸中水解11 min，可以顺利得到其苷元矢车菊素；以苯、乙酸乙酯、甲酸(2∶2∶1)为展开剂的硅胶薄层层析法分离矢车菊素的效果较好；矢车菊素对热和光较稳定，在酸性条件下稳定，对Co2+和Bi3+不敏感，对Zn2+、Fe3+、Cu2+不稳定。

In four flavor models, isoamyl alcohol model and ethyl acetate model have good capacity for simulation and prediction, whereas acetaldehyde model and diacetyl model do not.

在建立的4个风味物质模型中，异戊醇和乙酸乙酯模型的仿真能力和预测能力都比较强，双乙酰和乙醛模型的仿真能力和预测能力都比较差，需要进一步研究。

Hepatocytes were treated with 25 or 50 μg/mL of ethanol or ethyl acetate extracts of Ap or 10 or 20 μM andrographolide, which is the major active diterpene lactone of Ap, for 48 h.

因此，本实验利用大鼠初代肝细胞培养模式，探讨穿心莲对诱发 pi 属麸胱甘硫转移(pi class of glutathione S-transferase， GSTP)的作用。

Ethyl acetate?formic acid (100∶1∶0.5) as elute］.

乙酸乙酯？甲酸(体积比100∶1∶0.5)为洗脱剂，可以将大黄酚和大黄素甲醚完全分离。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。