色质

Tryptophan, an essential amino acid, plays a role in the production of the neurotransmitter serotonin.

色氨酸，一种必需氨基酸，发挥在生产羟色胺神经递质的作用。

Volatile flavor components of unfermented smelly tofu were extracted by a simultaneous distillation-extraction apparatus and analyzed by gas chromatography-mass spectrometry.

通过同时蒸馏萃取得到非发酵臭豆腐的挥发性风味物质，并通过气相色谱-质谱联用仪进行分析，共有49种化合物被检出。

Unguis Hominis METHOD:The lipids are extracted by solvent method,then esterified,and identified by capillary gas chromatography mass spectra computer technique.

溶剂法提取脂类成分，经酯化后，采用气相色谱-质谱-计算机联用技术分离鉴定，归一化法计算相对百分含量。

Unguis Hominis ; lipids ; squalene ; GC/MSD Analysis

人指甲；脂类；角鲨烯；气相色谱-质谱分析

And sediment of variegation sand-mudstone and gray-black carbonaceous-mudstone and thin coal layer of fluvial-plain marsh facies only grow on marginal slope of different stage basins.

仅在不同期次盆地的边缘斜坡带上发育河流—平原沼泽相的杂色砂泥岩夹灰黑色炭质泥岩、薄煤层沉积。

The height of plant was measured every 15 days. The essential oil of the lemon verbena was obtained by steam distillation in different period of growth and analyzed by GC and GC-MS.

测定了株高变化，用水蒸汽蒸馏装置提取精油，用气相色谱仪和气相色谱质谱联用仪分析了不同时期精油含有率与成分的变化，对比不同器官、不同部位和不同采样时间的精油含有率的差异。

Medthods:Volatile oil of chive was extracted by means of water-vapour distillation and its chemical components were assayed by capillary gas thromat ography-mass spectrometry.

用水蒸气蒸馏法提取韭菜中韭菜的根茎、韭菜叶、韭菜花挥发油，并用毛细管气相色谱/质谱法，鉴定出其挥发油的化学成分。

To establish the method of gas chromatography mass spectrometry and selected ion monitoring for the determination of organophosphorus, pyrethroid, organochlorine, carbamate and weedicide pesticide residues in foods.

目的 建立一种测定食品中有机磷、拟除虫菊酯、有机氯、氨基甲酸酯类和除草剂农药残留的气相色谱质谱方法。

Methods The pesticides were extracted with acetone and dichloromethane, warmed with water at 40℃,and circumrotated and evaporated until it was nearly dry, then it was purified by Envi Carb column and Sep Pak NH2 column. Afterwards, gas chromatography mass spectrometry and selected ion monitoring were used to determine 42 pesticide residues, such as organo-phosphorus, pyrethroid, organochlorine, carbamate and weedicide.

该法采用丙酮、二氯甲烷提取，40℃水浴旋转蒸发近干，以Envi-Carb柱和Sep-Pak-NH2柱净化，以气相色谱－质谱选择离子监测方式分析检测有机磷、有机氯、拟除虫菊酯、氨基甲酸酯和除草剂等42种农药残留。

And studied the organic components of the Ginkgo wood vinegar which was investigated with GC/MS in detail, and the effects of wood vinegar to bud bursting and seedling growth of crops.

另外，还采用气相色谱—质谱联用技术分析了副产品银杏木醋液的成分，研究了木醋液对作物种子发芽及其幼苗根茎生长的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐