甲醇

Three flavonoids compounds: kaempferol *!, quercetin *, and isoquercitrin *# were isolated from the leaves of Cyclocarya paliurus Batal.

采用溶剂萃取及多种色谱技术分离纯化，根据理化性质和光谱分析方法鉴定其结构，确定从青钱柳中分离得到山柰酚、槲皮素和异槲皮苷 3个黄酮单体化合物，并用反相高效液相色谱法对其含量进行了测定，测得各自在甲醇和水提取物中的含量：山柰酚 0 。

In this research, a 2D analytical mathematical model of a direct methanol fuel cell was developed to describe not only electrochemical reactions on the anode and cathode electrodes, but also transport phenomena within the fuel cell, operating isothermally at steady state.

在本研究中，我们建构一个甲醇燃料电池的数学模型，并推导得出其解析解。

Synthesis and performance of itaconic acid- maleic acid copolymer

由棕榈酸与甲醇酯化或棕榈油醇化，真空蒸馏而得。

Then, the whole herb of Juncus effusus was extracted with 95% ethanol. The ethanolic extract was further separated with petroether, chloroform, ethyl acetate and methanol in turn to give four fractions.

用95%乙醇提取制备了总提取物，然后将总提物用石油醚、氯仿、乙酸乙酯、甲醇依次萃取，分成极性大小不同的部位，通过药理活性筛选后确定了有效部位为乙酸乙酯部分。

The stem barks of Lagerstroemia calyculata Kurz were extracted with methanol and isolated with silica gel column chromatography.

副萼紫薇的茎皮经甲醇冷浸提取，依次用石油醚、乙酸乙酯和正丁醇萃取。

From Leontopodium nanum (collected from Zhang County, Gansu Province), 12 compounds were isolated, of which 9 compounds have been identified. Among them, a derivative of coumarin is new.

从采自甘肃漳县的矮火绒草全草的甲醇提取物中，采用同样方法共分离纯化得到12个化合物，鉴定了9个化合物的结构，其中有1个新化合物，命名为6，7-并二氧六环[2-（1-甲酯基-1-甲基）-甲烯基]-香豆素（1）。

The Java Brucea oil emulsion appended methyl extracts could restrain Bel-7402 hepatic carcinoma, KB nasopharyngeal darcinoma, and HL-60 leukosis and BGC-823 gastric tumor strain at same time.

加入脱脂鸦胆子甲醇提取物的鸦胆子油乳样品在抑制Bel-7402人肝癌、KB人鼻咽癌肿瘤菌株的同时，对HL-60人白血病和BGC-823人胃癌肿瘤菌株也有较好的抑制作用。

The expression of cloned cold-adapted lipase gene lipA in Pichia pastoris GS115 with the pPIC9k as the expressive vector was performed according to the methods described in the manual, version 3.0, of the pPIC9K identified the lip gene cloned here was a functional lipase gene.

以pPIC9K为表达载体，以GS115为表达宿主菌，成功构建重组表达质粒pPIC9K-lipA，经甲醇诱导表达，能够分泌有脂肪酶活性的表达产物，因此证明本研究所克隆的脂肪酶基因lipA确实为脂肪酶开放阅读框。

A method for the separation and determination of Pueraria lobata isoflavonoid extract by reversed-phase high performance liquid chromatography was proposed.

采用反相高效液相色谱法，在C1 8柱上以甲醇水为流动相进行梯度洗脱，在 0～ 1 0min内将葛根黄酮提取物进行分离，并在 2 5 0nm检测，采用标准加入法对实际样品中的葛根素含量进行了分析。

The linear ranges of the calibration curves for lycorine,lycoramine and galanthamine were 5.0-400 mg/L,respectively.

采用三乙胺水溶液(pH 9.0)-乙腈-甲醇作为流动相对石蒜碱、力可拉敏和加兰他敏进行HPLC测定，方法的线性范围为5.0~400 mg/L，检出限分别为5.0、5.1、10.2 ng，RSD分别为2.2%、5.7%和4.4%。

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。