查询词典 ethyl acetate

Phototaxis insects, ethyl acetate, collection methods

中文关键字：趋光性昆虫，乙酸乙酯，收集方法

Ointment extracted from Plastrum Testudinis was separated by silica gel column chromatography, gradiently eluted by petroleum ether-ethyl acetate, and 16 (Ts-1～Ts-16) components were obtained, which were biologically evaluated by MTT assay and flow cytometry on the proliferation of rat marrow-derived mesenchymal stem cells. Results showed that Ts-12 induced proliferation compared with the control group ( p ＜0.05), while Ts-4 showed inhibitive effect. Other groups showed no significance ( p ＞0.05). GC-MS was used to analyze the chemical components in different groups.

中药龟板提取物浸膏经硅胶柱层析，用石油醚-乙酸乙酯作洗脱剂，梯度洗脱，得到16个组分；采用MTT法和流式细胞技术研究了它们对鼠骨髓间充质干细胞的增殖作用，实验结果显示组分Ts-12具有促进rMSCs增殖的作用( p ＜0.05)，而组分Ts-4则表现出抑制rMSCs增殖的作用( p ＜0.05)，其它样品对rMSCs的增殖作用不显著( p ＞0.05)，不具统计学意义。

objective to observe the antitumor activities of different solution extracts of plumbago zeylanica l.in vitro.method mtt method was used to detect the inhibitory effects on four kinds of cancer cells.results chloroform extracts had significant inhibitory effects on the breast cancer cell(bre-04),the nerve cancer cell(n-04) and the lung cancer cell(lu-04),ic50 were 0.2699mg/ml and 0.2634mg/ml,0.4961mg/ml respectively.ic50 of chloroform extract on the hepg2 was 0.9379mg/ml.ic50 of petroleum ether extracts on bre-04,n-04,lu-04 and hepg2 was 0.5902mg/ml,0.5725mg/ml,0.7938mg/ml,0.6374mg/ml;ethyl acetate extracts had fairly inhibitory effects on the lu-04,ic50 was 0.7343mg/ml;n-butanol extracts and water-solubility extracts had notsignificant inhibitory effects on the four kinds of cancer cells.conclusion the antineoplastic effective parts of plumbago zeylanica l.were chloroform and petroleum ether extracts.

目的 探讨白花丹体外抗肿瘤作用的活性部位。方法 mtt染色法对白花丹五种溶剂提取物体外抗肿瘤活性进行了初步的研究。结果氯仿提取物对乳腺癌细胞（bre-04）、神经癌细胞（n-04）、肺癌细胞（lu-04）有较好的抑制生长作用，ic50分别为0.269 9 mg/ml、0.263 4 mg/ml、0.496 1 mg/ml，对肝癌细胞hepg2抑制作用差， ic50为0.937 9 mg/ml；白花丹石油醚提取部位对乳腺癌细胞（bre-04）、神经癌细胞（n-04）、肺癌细胞（lu-04）、肝癌细胞hepg2的ic50分别为0.590 2 mg/ml、0.572 5 mg/ml、0.793 8 mg/ml、0.637 4 mg/ml；乙酸乙酯提取物对肺癌细胞（lu-04）有一定的抑制作用，ic50为0.734 3 mg/ml；水溶性提取物以及正丁醇提取物无明显抑制肿瘤作用。结论白花丹氯仿提取部位、石油醚提取部位体外抗肿瘤作用较好，值得对其提取部位进一步分离纯化并研究其抗肿瘤作用机制。

The effect of various polar fractions from Psoralea corylifolia L. ethanol extract on cell proliferation and differentiation were further examined and its ethyl acetate fraction were found to be active fraction.

对补骨脂不同极性萃取物进一步进行成骨样细胞增殖和分化活性测试，发现补骨脂乙酸乙酯萃取物为补骨脂中的主要活性部分。

Compared with OVX, the ethyl acetate fraction from Psoralea corylifolia L. significantly increased bone mineral density and bone calcium content of rats.

结果表明，给予补骨脂乙酸乙酯萃取物的大鼠与模型组大鼠相比，骨密度、骨钙含量显著增加。

Objective: To investigate the effection of ethyl acetate extract of sappanwood on T lymphocyte subset to discuss the resist function and possible mechan.

目的：通过观察苏木乙酸乙酯提取物对小鼠T细胞亚群的影响，探讨苏木乙酸乙酯提取物的免疫抑制作用机制。

Result: Ethyl acetate extract of sappanwood can evidently reduce the content of CD4~+ of T cell and the ratio of CD4~+/ CD8~+, moreover have no infection on the content of CD8~+ of T cell.

结果：苏木乙酸乙酯提取物组同空白对照组相比能明显降低CD4~+T细胞含量并降低CD4~+/CD8~+的比值，而对CD8~+T细胞的含量无影响。

Ethyl acetate extract of sappanwood can reduce the content of CD4~+ of T cell and the ratio of CD4~+/ CD8~+ of spleen,possess determinate function on immuno-supression.

苏木乙酸乙酯提取物能降低正常小鼠脾细胞CD4~+T细胞含量并降低CD4~+/CD8~+的比值，具有一定的免疫抑制作用。且无量效关系。

Ethyl acetate extract of sappanwood is dilued with olive oil.use the equivalent dosage of active compound sappanwood 35g, 45g, 55g/kg to intragastric administration;blank control group use 0.2ml/10g olive oil to intragastric administration.

苏木乙酸乙酯提取物用橄榄油稀释，以相当于原药苏木35g、45g、55g/kg的剂量灌胃；空白对照组灌服同体积的橄榄油。连续灌胃8天后处死。

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。

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。