酸基

A method used to simutaniously analyze the residues of herbicides (4-chloro-2-methylphenoxy) acetic acid, 2-(4-chloro-2-methylphenoxy) propanoic acid and 4-(4-chloro-2- methylphenoxy) butanoic acid in garlic was developed.

建立了基质固相分散－高效液相色谱法同时测定大蒜中2-甲基－4-氯－苯氧乙酸、2-甲基4-氯－苯氧丙酸、2-甲基－4-氯－苯氧丁酸3种苯氧羧酸类除草剂残留的方法。

Other Ingredients: Purified Soft Water, Green Tea Extract, Dimethicone, Sunflower Oil, Cyclomethicone, Stearyl Alcohol, Aloe Vera Gel, Deep Sea Algae Extract, Almond Oil, Glyceryl Tearate, PEG 100 Stearate, Polysorbate 20, Comfrey Extract, Jojoba Oil, Shea Butter, Kukui Nut Oil, Squalane, Glyceryl Caprylate/ Caprate, Caprylic / Capric Triglycerides, Panthenol (Vitamin B5), Babussu Oil, Marigold Extract, Camellia Kissi Oil, Cetyl Dimethicone, Carbomer, Beta Carotene, Ester-C,(Calcium, Sodium, Magnesium and Zinc Ascorbates, Ascorbyl Palmitate and L-Ascorbic Acid),Evening Primrose Oil, Methylparaben, Propylparaben, Triethanolamine, Phenoxyethenol, Imported Tropical Flower Oils.

其他成分：纯净水软，绿茶提取物，二甲基硅氧烷，葵花籽油，环，硬脂醇，芦荟凝胶，深海藻提取物，杏仁油，甘油Tearate，硬脂酸聚乙二醇100，吐温20，康弗里提取物，霍霍巴油，乳木果黄油，库奎坚果油，角鲨烷，甘油辛酸/癸酸，辛酸/癸三酸甘油脂，泛醇（维生素原B5），Babussu 油，金盏花精华，山茶花基西油，十六烷基二甲基硅氧烷，卡波姆，β胡萝卜素，酯- C中，（钙，钠，镁，锌Ascorbates，抗坏血酸棕榈酸酯和L -抗坏血酸），月见草油，甲酯，尼泊金丙酯，三乙醇胺，Phenoxyethenol，热带花卉进口油。

A series of fluorenyl cardo polyimides were prepared by "one step" polycondensation of these cardo diamines with the dianhydrides4,4\'-oxydiphthalic anhydride(ODPA,3,3\'4,4\'-benzophenonetetracarboxylic dianhydride, 3,3\',4,4\'-biphenyl tetracarboylic dianhydrideand pyromellitic dianhydriderespectively.

由五种Cardo型二胺单体分别与3，3\'，4，4\'-二苯醚四酸二酐、3，3\'，4，4\'-二苯甲酮四酸二酐、3，3\'，4，4\'-联苯四酸二酐和均苯四甲酸二酐采用一步法溶液聚合制备了一系列芴基Cardo型可溶性聚酰亚胺。

Main production sulfide Green, Chloropicrin, picric acid, dinitro-chlorobenzene, potassium chlorate, high sodium chlorate, ammonium perchlorate, such as more than 30 kinds of products, exports of Asia and Europe more than 30 countries and regions. In 2000 through ISO9002 quality system certification, production scale, cost-effective, enterprise management, technological advancement, product quality, environmental protection are rising, has very broad prospects for development.

主要生产硫化青、氯化苦、苦味酸、二硝基氯化苯、氯酸钾、高氯酸钠、高氯酸铵等30多种产品，出口亚欧30多个国家和地区。2000年通过ISO9002质量体系认证，生产规模、经济效益、企业管理、技术进步、产品质量、环境保护均不断提升，具有十分广阔的发展前景。

Furthermore, the important fragment which is composed of pentenyl cinnamic acid and D-Tyrosine, and the ester which is composed of L-N-methylated phenyl amino acid and diketopiprazine was synthesized with considerable yield The conjugation of the new DOPA analogue into the peptide in the total synthesis of Pepticinnamin E was investigatited

另外，本文作者还进一步合成了高收率的戊烯基肉桂酸衍生物与D-酪氨酸的缩合片段及L-N-甲基苯丙氨酸与哌嗪二酮的酯两个重要的结构组成部分；对新多巴衍生物片段嵌入肽链中的工作亦进行了有益的尝试。

The effect of different reaction conditions,such as catalyst concentration,molar ratio of reactants,reaction temperature,reaction time,on the coupling reaction of trioxane and methyl formate synthesizing methyl glycolate and methyl methoxy acetate using sulfuric acid as catalyst has been studied.Through the analysis for the yield of products and system pressure,and comparison with other different acidity catalysts,we considered that the activation of formaldehyde was the control step of reaction rate to the...

以硫酸为催化剂，研究了三聚甲醛与甲酸甲酯偶联合成乙醇酸甲酯和甲氧基乙酸甲酯的反应中，催化剂浓度、原料配比、反应温度、反应时间等条件对反应过程的影响，通过对产物收率和系统压力变化的分析，并结合与其它不同酸强度催化剂的对比，得到甲醛的活化是偶联反应的速率控制步骤，催化剂的酸强度决定其对甲醛的活化能力，是影响偶联反应的主要因素。

In order to obtain 3-methoxy-4-hydroxymandelic acid with high quality and high yield, guaiacol was condensed with glyoxylic acid in an alkaline aqueous solution using solid acid as catalyst. The reaction temperature and reaction time was 15℃ and 18 hours respectively.

为了得到高质量和高收率的3-甲氧基－4-羟基苯乙醇酸，使愈创木酚和乙醛酸在碱性水溶液中在固体酸催化剂存在下进行缩合反应，反应温度15℃，反应时间18h。

Especially, in the second exon two base substitutions had been found at positions +368 and +456. At position +368, the first result was in substitution of glutamine for arginine. While the second was homonymy substitution at position +456.

在第2外显子有2处碱基取代，分别是+368处的G→A，导致精氨酸→谷氨酰胺，及+456处的T→C，为同义取代，仍为丙氨酸；第5外显子+1572处的A→G，导致组氨酸→精氨酸。

The constituents were extracted by some solvents. 18 constituents were isolated from Chloroform fraction by different chromatography. 15 constituents were identified by IR ,MS and NMR as follows: 3-sitosterol, P-sitosterylpalm itate,succinate acids, 1, 4-benzenediol, 1, 2-benzenediol, p-hydroxybenzaldehyde, syringaresinol, oleanolic acid, usolic acid, ethyl caffeate , Rosmarinic acid ethylster and etc. In such constituents ,nine compounds were isolated for first time from Origanum vulgare L..

牛至药材经水煮醇沉法所得浸膏，利用溶剂法和色谱法从中分离得到18个单体成分，通过IR、MS、NMR等波谱技术鉴定了其中的15个化合物，分别为β-谷甾醇(1)、β-胡萝卜苷(2)、琥珀酸(3)、对-二苯酚(4)、邻-二苯酚(5)、对羟基苯甲醛(6)、1.2-二羟基-4-异丙基-5-甲基苯(7)、新木脂素(8)、丁香脂素(9)、齐墩果酸(10)、乌苏酸(11)、4-二十六烯(12)、正二十六醇(13)、咖啡酸乙酯(14)、迷迭香酸乙酯(15)等，其中化合物3、4、5、6、7、8、9、14、15等9种化合物均为首次从该属植物中分离得到。

Given the known reaction mechanism and general chemical considerations, we propose that nicotine, when used as the carbon source by P. putida J5, is catabolized to pyruvic acid via pyrrolidine pathway and then participates in the synthesis of vitamin pantothenate and CoA, which supply the energy for the normal functioning.

通过对突变位点基因的功能分析推测，假单胞杆菌可以将尼古丁代谢为2，5-二羟基吡啶，而2，5-二羟基吡啶可以进一步转化为丁烯二酸和丙酮酸，进而参与了泛酸和 CoA 的合成，为生理代谢提供基质。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。