Ex Lind1. Methods: The chemical compositions of volatile oil of the plant which were obtained by steam distillation with hexane were analyzed by GC-MS equipped with a elastic quartz capillary column-HP-5MS5% Phenyl Methyl Siloxane (30 m× 0.25 mm ×0.25 μm).
利用有机溶剂-水蒸气蒸馏法提取挥发油，用气相色谱-质谱联用进行测定，色谱柱为HP-5MS5%Phenyl Methyl Siloxane(30m×0.25mm×0.25μm)弹性石英毛细管柱，结合计算机检索技术对分离的化合物进行结构鉴定，应用色谱峰面积归一化法计算各成分的相对百分含量。
Chemical composition analysis of these polysaccharides by PC and GC showed that both YCP〓 and YCP〓 are composed of D-glucose and Glucceronic acid.
YCP〓和YCP〓经酸水解后进行纸层析，结果显示很强的葡萄糖斑点和相当弱的葡萄糖醛酸斑点。
The rapid and low cost capillary GC method was introduced for the determination of BHC and DDT pesticide residues in vegetables.
对蔬菜中六六六、滴滴涕残留量的快速、低成本检测方法进行了研究。
Organic pollutants contained in the ash and flue gas released from the combustion of several different kinds of coal under different conditions, such as different atmospheres, different combustion temperatures and modes are studied with an integrated system of GC/MSD/IRD. The distribution or the content of PAHs, aliphatic chains, cyclic hydrocarbons and benzene families in the pollutants extracted is discussed.
用色谱／质谱／红外联用系统研究了原煤二氯甲烷浸取液及燃烧排放烟气、飞灰中几类主要有机污染物的分布，如脂环烃、苯系物、多环芳烃和直链烃等的含量和种类随浸取时间、燃烧温度和气氛、煤种、不同燃烧方式的变化而改变的规律。
After cleaned-up with florisil coloum, the extract was ready for GC-NCIMS/SIM analysis. The recoveries of most pesticides in 10 medicine crops with different effective part and 10 medicine preparations with different formation were between 70～120％ with RSD5％.
提取物通过Florisil柱净化后，进行GC-NCIMS/SIM法测定。10种不同药用部位的中药材和10种不同中药制剂中，农药残留的回收率大部分在70～120％之间，RSD5％。
By analyzing the GC-MS, author confirms three photolysis products: l-(2, 2-diethylhydrazino)-2-methylpropyl diazene, 2, 4-bis -6-methyl-s-triazine, 6-chloro-N-propyl-s-triazine, and discusses the process and mechanism of photolysis.
通过对阿特拉津光解产物的GC-MS鉴定与谱图解析确认了1-（2，2-二乙基联胺基）-2-异丁基二氮烯、2，4-二-6-甲基-均三嗪和6-氯-N-丙基-1，3，5-三嗪-2，4-二胺三种可能的光降解产物，进而对光解过程和机理进行了研究。
A new method for the quantification of volatile compounds in cider was developed using stir bar sorptive extraction followed by GC-MS.
研究了检测苹果酒中挥发性物质的一种新方法—搅拌棒吸附萃取气质联用技术。
Nopol was ozonized in methanol and ethanol respectively, followed by reductive hydrolyzation and GCMS analysis.
将诺卜醇分别在甲醇和乙醇中臭氧化后，再进行还原性水解，溶液经处理后进行了GC-MS分析。
The structures of 6 main products of ozonization of nopol were identified by GC-MS, and they are all four-ring compounds, the result suggests that the double bond, tertiary hydrogen can be oxidized, and there was other further oxidation.
通过GC-MS分析确定了6个诺卜醇臭氧化主要产物的结构，它们均为四元环类化合物，这表明诺卜醇臭氧化时碳碳双键、叔氢都会被氧化，还伴有其它更深层次的反应。
Loosen the turret handle, and the turret
5.2.3 松开刀台手柄，GC50 型滚槽机的刀台便可
The method was based on the extraction of the herbicides residues with acetonitrile and a cleanup with a Florisil column followed by elution with a mixture of n-hexane and acetone (6:4 by volume) and GC-MS/SIM detection.
粮谷与油籽中二苯醚除草剂残留通过乙腈提取，浓缩后过弗罗里硅土柱净化，采用正己烷－丙酮（体积比6：4）溶液淋洗，淋洗液吹氮至干后以正己烷定容，GC-MS选择离子监测模式测定。
CM, 500 mg b. i. d., was added to a mild-low dose of GC and to MTX.
克拉霉素的用法为500mg/次，2次/天。
METHODS GC-MS was used to analyse the chemical constituents of the essential oil of Thymus quinquelostatus Celak.
采用气相色谱-质谱联用仪对五脉地椒全草挥发油化学成分进行了分析鉴定。
It was shown that different primers and different targets needed different concentrations of betaine.
经过试验，发现不同GC含量的引物需要使用不同浓度的甜菜碱。
The kinetic behavior of ORR on the Pt/PoPD/CNTs/GC electrode was also investigated by linear sweep voltammetry.
采用线性扫描伏安法在旋转圆盘电极上考察了氧还原在Pt/PoPD/CNTs/GC电极上的动力学行为。
Firstly, headspace solid-phase microextraction was established to determine AITC by orthogonal design. Extraction temperature, stir speed, extraction time, and desorption time were set at 40℃, 900r/min, 30min, and 5min, respectively. Under these optimal conditions, volatile flavor compounds in mustard oil, wasabi, and'Chongcai'leaf mustard product were identified by SPME/GC/MS. In these three samples, 6, 12, 17 constituents were identified respectively; Allyl isothiocyanate was the main flavor compound, which accounted for 73.45%, 64.25%, 32.74% of total volatile compounds, respectively. Carbon disulfide, a hydrolysis product of AITC, accounted for 14.37% 25.40%, 51.67% of total volatile compounds respectively. There were some other isothiocycannates, such as butane, 1-isothiocyanato-, isobutyl isothiocyanate, 1-benzene, 4-isothiocyanato-, benzene (2-isothiocyanatoethyl)-, etc.
首先采用正交实验设计优化固相微萃取技术的前处理条件，结果表明，以萃取温度40℃、搅拌速度900r／min、萃取时间30min、解吸时间5min为最佳条件；在此最优条件基础上，利用SPME／GC／MS联用技术分析芥末油、青芥辣、冲菜的挥发性风味成分，分别检出6、12、17种化合物，主要风味物质均为AITC，相对丰度分别为73.45％、64.25％、32.74％；AITC的水解产物二硫化碳的相对丰度分别为14.37％、25.40％、51.67％；还检测到了其它几种异硫氰酸酯，如异硫氰酸丁酯、异硫氰酸异丁酯、异硫氰酸丁烯酯、2-苯乙基异硫氰酸酯等。
If DNA were random strings of letters, you would expect about half of the G's in a genome to be on the leading strand, and the other half on the lagging strand.
GC skew在染色体复制起始位点、终止点产生明显的由负到正、由正到负的变化。
The chemical constituents of extracts of Tamarindus indica L were determined by GC-MS. The relative contents of constitutes were determined by area normalizing method. 48 compounds were identified, amounting to total mass fraction 98.5%. The main compounds were 5-methyl-2(3H)-furanone, diethyl succinate, furfural, hexadecanoic acid, linolenic acid, 5-methylfurfural, oleic acid, linoleic acid, etc.
并利用气相色谱仪-质谱仪对罗望子萃取物的化学组成进行了分析鉴定，并用面积归一化法测定了各种成分的质量分数，共鉴定了48种成分，占总质量分数为98.35%，其中主要成分为：5-甲基-2(3H)-呋喃酮、丁二酸二乙酯、糠醛、十六酸、亚麻酸、5-甲基糠醛、油酸、亚油酸等。
A high performance GC method was established for determination of determination, parathion-methyl and malathion residues in marine organisim.
建立了气相色谱法测定海洋生物体中乐果、甲基对硫磷和马拉硫磷残留量的方法。
GC/MS analysis shows that atrazine can be hydrolyzed and dehalogenated by strain W4; the biodegradation product- hydroxyatrazine is confirmed.
GC/MS分析结果显示，菌株W4降解阿特拉津遵循氯水解途径，代谢产物为2-羟基-4-乙胺基-6-异丙胺基-1，3，5-三嗪。