查询词典 acid

The lumped kinetic model of monoterpene, abietic type resin acid, pimaric acid type resin acid, p-cymene, hydro-monoterpene, dehydro-abietic acid, hydro-abietic type resin acid, and hydro-pimaric acid type resin acid was established based on the structural groups and approximate reaction kinetic theory according to the fundamental principles of the lumped method.

在消除内、外扩散影响的条件下，在线跟踪反应产物并用气相色谱法测定反应体系组成随时间的变化，构造了Pd／C催化剂上松脂分子间氢转移集总反应网络，建立了包含单萜烯、枞酸型树脂酸、海松酸型树脂酸、对伞花烃、氢化单萜烯、脱氢枞酸、氢化枞酸型树脂酸和氢化海松酸型树脂酸等复杂反应体系的集总动力学模型，并估算了模型参数。

In this paper, firstly using natural fatty acids including lauric acid, myristic acid, palmitic acid etc. and disproportionated rosin as starting materials, the acyl reaction of starting materials with SOCl_2 respectively, and then using Schotten-Baumann condensation: on the reaction conditions of alkalescence, condensation of acylchloride with amino acid (sarcosine, glycine, alanine etc.), and then acidification, saltation. A series of anionic surfactants of N-acyl amino: sodium N-fatty acyl sarcosinate (SFS-12, SFS-14, SFS-16); sodiun N-fatty acyl glycinate(SFG-12, SFG-14, SFG-16); sodium N-fatty acyl alaninate(SFA-12, SFA-14, SFA-16)and sodium N-disproportionated rosinoyl aminatewere prepared. During the preparation of N-acylamino acid, the reaction conditions of acylchloride with amino acid condensation were identified by optimizing the synthetic conditions of N-lauroyl sarcosine: mol ratio of amino acid to acylchloride 2:1, reaction taken place in a solvent composed by acetone/water 2:1, acylchloride and 20% NaOH were slowly added to the reaction mixture at the same time while maintaining the pH at 9~10, after completion of adding maintaining reacting for 2.5h at 25℃.

首先以月桂酸、肉豆蔻酸、棕榈酸等天然脂肪酸和歧化松香为原料，与氯化亚砜反应制得酰氯，然后采用Schotten-Baumann 缩合法路线，即在碱性条件下，酰氯和氨基酸(肌氨酸、甘氨酸、丙氨酸等)缩合，经过酸化、成盐，合成一系列氨基酸型阴离子表面活性剂：脂肪酰肌氨酸钠，即月桂酰肌氨酸钠(SFS-12)、肉豆蔻酰肌氨酸钠(SFS-14)、棕榈酰肌氨酸钠(SFS-16)；脂肪酰甘氨酸钠，即月桂酰甘氨酸钠(SFG-12)、肉豆蔻酰甘氨酸钠(SFG-14)、棕榈酰甘氨酸钠(SFG-16)；脂肪酰丙氨酸钠，即月桂酰丙氨酸钠(SFA-12)、肉豆蔻酰丙氨酸钠(SFA-14)、棕榈酰丙氨酸钠(SFA-16)；N-歧化松香酰基氨基酸钠(sodium N-disproportionated rosinoyl aminate)，即N-歧化松香酰基肌氨酸钠(sodium N-disproportionated rosinoyl sarcosinate ，简称SDRS)、N-歧化松香酰基甘氨酸钠(sodium N-disproportionated rosinoyl glycinate，简称SDRG)、N-歧化松香酰基丙氨酸钠(sodium N-disproportionated rosinoyl alaninate，简称SDRA)。

When the concentration of zinc nitrite is lower than 0.1 M,(002) is the prior face for zinc oxide. As the concentration raise, the other kinds of crystal face would appear. Among those data,(002) grows the best when the concentration of zinc nitrite is 0.06 M. We add lactic acid and citric acid respectively; there is an carboxyl group on the lactic acid and three carboxyl groups on the citric acid. The monodentate of lactic acid helps the growth of zinc oxide, compared to the tridentate of citric acid which can only produce zinc oxide film under very low concentration, but the growth of (002) face is not that stable as adding the lactic acid and zinc will electrodeposit to substrate.

实验中，当硝酸锌浓度低於0.1 M 时，氧化锌以(002)面为优选位相，当浓度提高，其他晶面将会出现，当硝酸锌为0.06 M，(002)晶面成长最佳，分别加入乳酸和柠檬酸，乳酸结构上有一羧基团而柠檬酸有三个羧基团，单芽基的乳酸有助於氧化锌成长，对照於三芽基的柠檬酸，则必须在极低的浓度下才能制备氧化锌薄膜，但(002)面成长却没有添加乳酸来的稳定而金属锌也会电沉积到基板上。

There weremainly p-hydroxybenzoic acid,vanillic acid,and syringic acid in soybean root exudates.Vanillicacid,syring acid and ferulic acid were found in soybean shoots.The soybean roots containedvanillic acid and p-coumaric acid.

大豆根分泌物中主要含有对羟苯甲酸、香草酸和丁香酸，而大豆植株地上部主要含有香草酸、丁香酸和阿魏酸，根部以香草酸和香豆酸为主。

Sulfuric acid series, hydrochloric acid (AR hydrochloride, CP hydrochloric acid) series, nitric acid, phosphoric acid, boric acid, protopine, soda ash, ammonia, acetic acid, bleaching powder, chloride, alkaline chlorine of aluminum, nickel chloride, nickel sulphate, polyacrylamide, such as hydrogen peroxide.

硫酸系列，盐酸系列，硝酸，磷酸，硼酸，片碱，纯碱，氨水，冰醋酸，漂白粉，聚合氯化铝，碱式氯化铝，氯化镍，硫酸镍，聚丙烯酰胺、双氧水等。

Thirdly, the acrylic rosin was synthesized by the addition reaction from gum rosin andacrylic acid. The levo-pimaric acid was converted into acrylic pimarie acid throughDiels-Alder addition with acrylic acid. The abietic-type acids in the gum rosin were inisomerization balance under high temperature, and the abietic acid and palstric acid would beconverted into levo-pimaric acid and reacted in the later type.

第三，通过脂松香与丙烯酸加成合成了丙烯酸松香，该反应是左旋海松酸与丙烯酸发生Diels-Alder加成反应生成丙烯海松酸，由于脂松香中的枞酸型树脂酸在高温下处于异构化平衡状态，因此随着反应的进行枞酸、长叶松酸等会异构化为左旋海松酸参与反应。

Most sugars, organic acids, phenolic acids and most amino acids increased significantly with elevated CO_2. The treatment, 950±50μmol·mol-1 CO_2 enrichment for 6 h every day had more obvious effects than the treatment, 950±50μmol·mol-1 CO_2 enrichment for 3 h every day. Levan, sucrose, arginine, oxalic acid, alanine, malic acid, acetic acid, lactic acid cinnamic acid,ρ- hydroxybenzoic acid and benzoic acid increased significantly.

CO_2施肥黄瓜根系分泌有机酸、氨基酸、糖和酚酸的总量增加，上、下午均施肥的处理分泌数量最多；CO_2施肥显著促进了果聚糖、蔗糖、草酸、苹果酸、乙酸、乳酸、多数氨基酸、肉桂酸、对羟基苯甲酸和苯甲酸等组分的分泌；单位鲜重根系分泌糖和酚酸的数量增加，多数氨基酸保持不变或降低，但有机酸分泌规律不一致。

The major acid detected in the apple rhizosphere and the wormcast was oxalic acid, malic acid, tartaric acid, succinic acid and malonic acid, one of highest content was oxalic acid.

苹果根际和蚯蚓粪中检测到的有机酸主要有草酸、苹果酸、酒石酸、琥珀酸和丙二酸，以草酸含量为高。

Kinds of commercial milk powder were analysed with GC-MS in order to learn about their fat acid compose,and the result illuminated that there were 28 kinds of fat acids were detected in all samples,and only octanoic acid and decanoic acid were detected from 4 kinds of season fat acids of hexanoic acid, octanoic acid ,nonanoioc acid and decanoic acid.

用气质联用色谱分析了11个商业奶粉样品的脂肪酸组成以及含量，每个样品均检测到了28种脂肪酸，在表现奶粉风味的4个呈味脂肪酸，也即辛酸、己酸、壬酸和葵酸中只检测到了辛酸和葵酸。

Long-chain Dicarboxylic acid; 11 carbon dicarboxylic acid; twelve carbon dicarboxylic acid; tridecanedioic acid; 14 carbon dicarboxylic acid; 15 carbon dicarboxylic acid; carboxylic acid

一期工程年产6000吨的发酵长碳链二元酸（DC11~DC15、DC18）生产线于2003年3月建成投产，装机容量6万KW的热电厂于2004年3月并网发电。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。