多羧酸的

基本解释 (translations)

polycarboxylic

与多羧酸的相关的网络例句 [注：此内容来源于网络，仅供参考]

The present invention relates to a coating composition comprising; A at least one polyester oligomer prepared from reactants comprising a 20 60 wt.% of at least one polyol, b 5 30 wt.% of at least one polycarboxylic acid selected from the group of cyclic polycarboxylic acids, the esters or the anhydrides thereof, wherein the carboxyl groups are separated by 3 carbon atoms or less, and from the group of alpha , beta -saturated acyclic polycarboxylic acids, the esters or the anhydrides thereof, and c 20 60 wt % of at least one monocarboxylic acid, the sum of the wt.% indicated for the reactants,, and always being 100 wt.%, and the oligomer being a low-viscosity oligomer having a weight average molecular weight Mw of less than 5,000, and a hydroxyl number in the range of about 200 to about 400 mg KOH/g oligomer, and B at least one polyisocyanate.

本发明涉及一种包含如下组分的涂料组合物：A至少一种由包含如下成分的反应物制备的聚酯低聚物：a20-60wt％至少一种多元醇，b5-30wt％至少一种选自其中羧基被3个或更少碳原子隔开的环状多元羧酸、其酯或酸酐以及选自α，β-饱和的无环多元羧酸、其酯或酸酐的多元羧酸，以及c20-60wt％至少一种一元羧酸，其中反应物、和的wt％之和总是为100wt％，所述低聚物是重均分子量Mw低于5000且羟基值为约200-约400mg KOH/g低聚物的低粘度低聚物，以及B至少一种多异氰酸酯。

They have close relationship as the former may provide new ideas and approaches for the later, while the later may be the simulation for the former and gives it helps in degradation products identification and mechanism explanation. It is necessary to choose a suitable system, which has high potential of treating EDs and close relationship to the natural environment, to combine the researches in the two aspects. Our group has been engaged in researches on the photochemical properties and application to water pollution control of different ferric species including Fe -OH complexes, Fe -polycarboxylate complexes, Ferric oxides and Fe -humic acid complexes. Fe -oxalate complexes system has higher efficiency than the other ferric species systems in photooxidation and degradation of organic compounds. This thesis is focused on the photodegradation of nine EDs estradiol (E2), estrone (E1), 17α-ethynyl estradiol (EE2), diethylstilbestrol , bisphenol-A , 4-Nonylphenol , 4-Octylphenol , di-n-butyl phthalate , and di (2-ethylhexyl) phthalate .

因此从处理效率和环境化学意义两方面考虑，结合本课题组在不同铁形态（包括Fe-OH配合物、Fe-多羧酸配合物、Fe氧化物、Fe-腐殖酸配合物等）的光化学特性及其在水污染控制中的应用方面较系统的研究工作基础，本论文选择了四类共9种典型的内分泌干扰物（雌二醇（E2）、雌酮（E1）、17α-乙炔基雌二醇（EE2）己雌酚、双酚A、壬基酚、辛基酚、酞酸二丁酯和酞酸二乙基己基酯），研究了它们在Fe-草酸盐配合物体系中的光降解效果，推测其降解机理，探索环境内分泌干扰物光氧化处理的新体系，同时为预测其在环境中的光降解行为提供了依据。

According to the graph of adsorption speed, a conclusion can be drawn that formic acid and acetic acid are fixed on the resin with multimolecular adsorption while propanoic acid and pentanoic acid are carried by monomolecular adsorption.

通过其吸附速度、吸附等温线的研究，得出甲酸和乙酸在该树脂上以单分子吸附为主，丙酸和成酸以多分子吸附为主，而且吸附的强弱与羧酸的解离有关，解离越强吸附越弱，反之，吸附越强。

The performance and mechanism of corrosion inhibitions of POCA were studied bymethods such as weight-loss, electrochemistry, EDS, XPS and quantum chemistry. It isfound that POCA is cathodic corrosion inhibitor, having synergistic effect with HEDP andZn~(2+). The P and O atoms of phosphono have important electron density contribution toHOMO orbital and the electron gross orbital population is bigger than 1, so it is easy toform absorbing location between phosphono and metal resulting in good corrosioninhibition on mild steel.

通过利用失重法、电化学方法、扫描电镜、X光电子能谱、X-射线能谱和量子化学方法研究膦酰基羧酸的缓蚀性能及其机理，发现POCA是一种阴极型缓蚀剂，与HEDP、Zn~(2+)具有优良的协同增效作用；POCA分子中的膦酰基基团的P原子和O原子对HOMO轨道电荷密度贡献较大，且其轨道电子布居数均大于1，因此比较容易通过膦基与金属形成吸附位而对碳钢具有良好的缓蚀作用；对铜合金具有一定的腐蚀作用，但腐蚀作用比HEDP等有机膦药剂要小得多，同时与BTA具有优良的相容性，添加1mg／L的BTA则可以有效地防止铜合金的腐蚀。

CNTs were first pre-treated using acid solution (HNO3) to obtain CNTs functionalized with carboxylic groups. Subsequently, the stearyl alcohol was grafted onto CNT with the assistance of dehydrating agent, N,N'-dicyclohexyl-carbodiimide. Excellent dispersion in organic solvents such as acetone, THF, and chloroform was found for the modified CNTs (CNT-C18). In addition, the PBS/CNTs nanocomposites were then prepared through simple melt-blending. Mechanical properties, thermal behavior, conductivity of resultant polymer/CNT composites were investigated. The results show that excellent dispersion of nanotubes in the PBS matrices was achieved.

为了增加多壁奈米碳管在复合材料中的分散性，将碳管表面进行化学修饰，首先将多壁奈米碳管浸入HNO3溶液中，进行酸化，使碳管表面带有羧酸的官能基，然后再加入十八烷醇，在温和的条件下，藉由N，N'-二环己基碳二亚胺(N，N'-dicyclohexyl- carbodiimide，DCC)脱水剂脱水，使碳管和十八烷醇之间产生酯基的化学键结，改质后的碳管可以分散在acetone、THF、chloroform…等有机溶剂中，结果显示成功的利用DCC脱水剂完成碳管的改质。

The invention relates to condensation products comprised of cyclic carboxylic acid anhydrides of dicarboxylic acids, tricarboxylic acid anhydrides or tetracarboxylic acid anhydrides and difunctional polyamines, especially polyoxyalkylene amines.

本发明涉及由二元羧酸的环状羧酸酐、三羧酸酐或四羧酸酐和二官能化多胺，特别是聚氧化烯胺制备的缩合产物。

Among the analysis methods, back-titration with Ca 〓 was adopted other than direct-titration or back-titration with NaOH. Because Ca 〓 method is carried out in acidic condition, in which the hydrolysis of ester-linkages could be neglected.

该法的分析测定是在酸性条件下进行的，多羧酸纤维素酯在酸性条件下基本不水解，可以忽略酯键存在对测定结果的影响。

Therefore, DSC method can be the choice for screening catalyst in reaction of PCA with cellulose.

表明DSC可以用于多羧酸与纤维素纤维酯化反应选用催化剂的研究。

Kinetics studies showed that the esterification of PCA with cotton could be described as a first-order equilibrium reaction.

本文认为多羧酸与棉纤维的酯化反应是一级可逆反应。

Examples of metal chelating groups include hydroxides especially aryl or heteroaryl hydroxides such as phenolic hydroxides; amines which may be aliphatic aryl or heteroaryl; mercaptans which may be aliphatic aryl or heteroaryl; carboxylic acids which may be aliphatic aryl or heteroaryl; oximes and ketoximines; acetarylamides; hydroxy silanes and silicones; N-containing heterocycles such as imidazoles benzimidazoles triazoles benzotriazoles thiazoles isothiazoles acid anhydrides and more preferably acid groups (especially carboxylic acid groups phosphoric acid groups polyphosphoric acid groups phosphonic acid groups sulphuric acid groups and sulphonic acid groups).

金属螯合组的例子包括氢氧化物，特别是芳基或如酚醛氢氧化物杂氢氧化物；胺可能是脂肪族，芳基或杂；硫醇可能是脂肪族，芳基或杂，这可能是脂肪族，芳基或羧酸杂；肟和ketoximines； acetarylamides；羟基硅烷和有机硅，含N，如咪唑，苯并咪唑类，三唑类，苯并三氮唑，噻唑类，isothiazoles，酸酐杂环，多最好酸组（特别是羧酸团体，磷酸，团体，多聚酸组，膦酸组，硫酸团体和磺酸组）。

与多羧酸的相关的网络解释 [注：此内容来源于网络，仅供参考]

Organic acids：有机酸

有机酸(organic acids)是具羧基的化合物(不包括氨基酸),广泛存在于植物体的各部位,尤以果实中为多见. 一般有酸味,具收敛、固涩功用. 如五味子收敛止汗,金樱子涩精止遗,覆盆子涩精缩尿,乌梅敛肺止咳、温肠止泻等. 有的特殊的有机酸如土槿皮酸能抗真菌,马兜铃酸能增强

Andrews：安德鲁斯

随着对催化剂研究的深入, 20世纪80年代末至90年代初,韦尔奇(Welch)、安德 鲁斯(Andrews)、杨(Yang)等人将含磷的无机酸盐, 尤其是碱金属盐类,如磷酸二氢钠、磷酸氢二钠、次 磷酸钠、焦磷酸钠和多聚磷酸钠等,用于多元羧酸 与纤维素交联的体系,

Bryophyllum：落地生根属

在落地生根属(Bryophyllum)等多汁植物的叶、或悬钩子类中特别多,生物能够利用的是D型. 是三羧酸循环中的一个成分. 柠檬酸在鸟头酸酶的作用下可逆地生成异柠檬酸和顺鸟头酸. 在异柠檬酸脱氢酶(EC1.1.1.41)的作用下变成a-酮戊二酸,

carboxylation：羧化

中文摘要 米碳管拥有优异的各项物性质,而本研究著眼於其特别优异的热传导性质,多层奈米碳管的热传导系数高达3000W/m-K,因此本研究将奈米碳管以化学的方式改质,首先利用羧化(carboxylation)反应的方式让奈米碳管带有羧酸基(carboxylic acid groups,

glycolysis：醣酵解

确实对代谢作用的集线器的研究表明在RNA世界的重新塑造,例如处于代谢作用网络中最多的连接物质之列的有辅酶A, NAD和GTP,它们是大多数动物的某些代谢通道,例如醣酵解(glycolysis)和三羧基酸周期(tricarboxylic acid cycle)中的元素.

endotoxic shock：内毒素休克

2.内毒素休克(endotoxic shock)在临床上极为多见. 休克早期、由于细菌毒素对呼吸中枢的直接刺激或有效循环血量降低的反射刺激,可引起呼吸增快、换气过度,导致呼吸性碱中毒;继而因脏器缺氧和血液不足,生物氧化过程障碍,线粒体三羧酸循环受抑制,

Stearyl Alcohol：十八烷醇

为了增加多壁奈米碳管在复合材料中的分散性,将碳管表面进行化学修饰,首先将多壁奈米碳管浸入HNO3溶液中,进行酸化,使碳管表面带有羧酸(-COOH)的官能基,然后再加入十八烷醇(Stearyl alcohol),在温和的条件下,藉由N,N'-二环己基碳二亚胺(N,

Legionella pneumophila：嗜肺军团杆菌

嗜肺军团杆菌(Legionella Pneumophila) 的发现虫肺炎(PCP)和其他机会性感染的发病率莫能菌素(Monensin) 亦称莫能霉素、肉桂霉素. 是一种具有五环单羧酸多醚结构的脂溶性抗生素.

polysome：多核糖体

胜键是在细胞内的多核糖体(Polysome)上形成的(多核糖体是由m-RNA与核糖体结合而成). 胜键是由一个胺基酸的羧基内脱去一个OH与另一个胺基酸的胺基脱去一个H而形成(如图六). 各种t-RNA的作用在寻找其特定的胺基酸与之连结,

AEC：醇醚羧酸盐

1 烷基多苷(APG)及葡萄糖酰胺(AGA)2 醇醚羧酸盐(AEC)及酰胺醚羧酸盐(AAEC)3 单烷基磷酸酯(MAP)及但烷基醚磷酸酯(MAEP)烷基糖苷(APG)是一种由葡萄糖的半缩醛羟基与脂肪醇羟基再算催化作用下脱去一分子水而得的一种苷化合物.