羧基

After investigation of a series of synthetic routes of Cefepime, we determined the best route and researched each step of the synthetic process for the goal of cost-cut, simplifying operation procedure and improving yield.

以7-ACA为起始原料，经硅烷化保护氨基和羧基、碘代、置换、脱保护、成盐、缩合、成盐等六步反应，合成了目标化合物，总收率为21％（以7-ACA计）。产品结构经1H-NMR、MS确证。

The IR spectra indicated that the functional group—COO〓 in PASP linked to the surface of carbon steel. The pitting corrosion inhibition of tungstate and BTA on carbon steel and the passivation of carbon steel in solutions containing sodium borate were studied by the measurement of polarization curves and the curves of current vs.

失重法研究钨酸钠与聚天冬氨酸对碳钢的协同缓蚀效应发现，钨酸钠与PASP对自来水中的碳钢有协同缓蚀作用，加入锌离子可产生进一步的协同作用，碳钢表面分析表明：聚天冬氨酸是以羧基在碳钢表面成键。

Various chrome complex dyes(1:1 ratio) of mordant black 1,mordant black 7,mordant black 9 and mordant black 11 have been synthesized and sodium dichromate is been used as mordant agents instead of Cr3+ to oxidate dyes sufficiently.

还设计合成了媒介黑1、媒介黑7、媒介黑9和媒介黑11的高水溶性1∶1络合染料，重铬酸钠作为铬化试剂，染料得到了充分的氧化，无色配体多羟基羧基酸的引入使染料有很好的水溶性，该实验路线未见报道。

A novel procedure for the extraction of lysozyme from egg-white using carbon nanotubes as a sorbent was developed.

建立了以羧基功能化的多壁碳纳米管作为吸附剂在线提取蛋清中溶菌酶的新方法。

A varnish used for coverlay was prepared with special epoxy resin, carboxyl-terminated acrlonitrilebutadiene rubber and phosphorated flame retardant. To conform to the requirements of RoHS, the halogen-free flame-retarded coverlay does not contain Stibium, lead, mercury, cadmium and chromium Ⅵ.

摘 要：采用端羧基丁腈橡胶增韧改性特种环氧树脂体系，配合使用添加型磷系阻燃剂得到覆盖膜用胶液，以此制备的SF305C无卤阻燃型覆盖膜不含锑和铅、汞、镉、六价铬等有害重金属，满足欧盟RoHS指令要求。

The polymer was adsorbed in a more coiled configuration at lower pH values and turned to a more stretched-out configuration at higher pH values.

PAANH〓在Al〓O〓表面吸附的红外光谱表明，PAANH〓是通过长链上的羧基离子与Al〓形成化合物而吸附在Al〓O〓表面上的。

The analysis of 1H NMR showed that the succinyl group was successfully conjugated to the amino group of chitosan molecule, and the degree of substitution of Suc-Chi values increased with increasing succinic anhydride/amino mole ratio or reducing the molecular weight of chitosan.

利用壳聚糖和琥珀酰酐反应合成了N-琥珀酰壳聚糖，1H NMR分析表明通过反应可在壳聚糖的侧氨基引入亲水性的羧基，增加琥珀酰酐／氨基的摩尔投料比或者选择分子质量较小的壳聚糖，有利于提高N-琥珀酰壳聚糖的琥珀酰化度。

The S 2p, C 1s, N 1s and O 1s spectra were typically analyzed. Experimental result has demonstrated that using MUA/Au, Ag as the substrates, collagen immobilization process in wet cell system or in atmospheric environment did not have qualitative or quantitative difference. Firstly, our well cell system is feasible to carry out on-line collagen immobilization process.

实验结果显示：具有羧基之 MUA /Au，Ag 於真空湿室反应室中及传统大气环境下固定胶原蛋白，试片在两种环境所固定的胶原蛋白结构，在定性及定量分析上无显著差异，先证实在本真空湿室反应室中进行连续的蛋白质固定程序具体可行。

XPS and FTIR spectroscopy analysis indicated that chemical bonds were formed between maleic rosin and wood flour through the esterification reaction of anhydride groups and hydroxyl groups on wood surface.

FTIR与XPS分析表明，马来松香分子中的酸酐基团与木粉表面的羟基发生了酯化反应，并且马来松香是以单酯的形式接枝到木粉表面，同时产生－游离羧基。

After the diazotization ,2-aminophenol-4-(2-'carboxy)sulfanil phenylamine was coupled with acetoacetanilide,2-naphthol,1-phenyl-3-methyl-5-pyrazolone,1-naphthol-4-sulfonic acid,separately to get the different diazotized compounds,then complexed with potassium chromium sulfate or cobaltous chloride to obtain the yellow,orange,red,purple,blue and other colour dyestuffs.

2-氨基苯酚-4-(2'-羧基)磺酰苯胺重氮化，分别与乙酰乙酰苯胺、2—萘酚、1-苯基-3-甲基-5-吡唑啉酮、尼文酸、1-乙酰氨基-7-萘酚等偶合，得到不同的偶氮化合物，然后分别与硫酸铬或氯化钴进行络合反应，得到黄、橙、红、紫、蓝多种颜色染料，并进行了毛织品的染色实验。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。