酸式

Sodium hexametaphosphate, sodium acid pyrophosphate, monosodium phosphate,disodium phosphate

六偏磷酸钠，酸式焦磷酸钠，，磷酸二氢钠，磷酸氢二钠，磷酸氢二钾，磷酸二氢钾

ABSTRACT Immobilized penicillin acylase (from E.coli) was used to catalyze 7 phenylacetamido 3 E propenyl cephalosporanic acid hydrolyzation into 7 amino 3 E propenyl cephalosporanic acid. Then, trans APRA was acylated with hydroxyethyl ester of 4 hydroxy D phenylglycine to obtain trans cefprozil.

以7 苯乙酰氨基 3 E 丙烯基 3 头孢菌素 4 羧酸为原料，在青霉素酰化酶作用下，首先酶法水解得到3 E 丙烯基 3 头孢菌素 4 羧酸，过滤固相酶，滤液调pH分离得到反式APRA固体；在青霉素酰化酶作用下，反式APRA再与对羟基苯甘氨酸乙二醇酯缩合，得到反式头孢丙烯；酶法合成所得的产品与进口反式头孢丙烯对照品一致。

A dye recycled photosensitization system has been designed. As a result of studies in the mechanism of electron transfer reaction of xanthene iodonium salt, it is proposed that the dye-recycled process consists of three-step reactions during the photosensitization: The oxidative fading product of dye is formed through electron transfer under irradiation; In the presence of H-donor, product changes into acidic leuco dye product; Product undergoes deprotonization under action of base to regenerate initial dye.

本文设计了染料循环再生的光敏反应体系，通过对占吨碘翁盐电子反应机制的深入研究，提出了占吨染料在光敏反应过程中的染料再生循环，它依次由三个反应过程组成：在光作用下，通过电子转移反应，产生染料氧化褪色体；在H给体存在下，通过H转移反应，使产物转化为染料酸式隐色体；在碱作用下，发生去质子反应，染料再生回复到染料的起始结构。

The roles of light, H-donor and base are three major factors in the process of dye regeneration. For the efficiency of dye regeneration, it is critical to control the proportion of acidic leuco dye product.

其中光、H给体和碱的作用是再生循环的三个要素，而控制染料酸式隐色体生成比例是染料再生效率的关键。

A new design of glass-stoppered microburet was introduced and its installation was described in detail.

介绍了一种环保型酸式自动滴定管的结构、特点及使用方法。

In patients given 13- cis -retinoic acid and vitamin E, there was a statistically significant reduction in parabasal layer cell growth compared with the placebo treatment, but not in those given 9- cis -retinoic acid.

在接受13-顺式视黄酸和维生素E的患者中，他们副基底层细胞生长显著降低，当分析活组织切片时，使用13-顺式视黄酸和9-顺式视黄酸的治疗都显著降低了细胞生长。

Escherichia coli and many other microoganism synthesize aromatic amino acids through the condensation reaction between phospho enolpyruvate and erythro.

ppsA和tktA是芳香族氨基酸生物合成中心途径的两个关键酶基因，在大肠杆菌中，ppsA基因编码磷酸烯醇式丙酮酸合成酶A ，该酶催化丙酮酸合成磷酸烯醇式丙酮酸；tktA基因编码转酮酶A ，该酶在磷酸戊糖途径中生成 4 磷酸赤藓糖起主要作用。

Neural networks based on local sequence and amino acid component with the best structures and linear equation are constructed. The results of testing to the networks indicate that the forming of cis-proline has distinct relationships with local sequence and amino acid component. A new method for peptidyl prolyl cis/trans conformation prediction based on the theory of support vector machines was introduced. The SVM represents a new approach to supervised pattern classification and has been successfully applied to a wide range of pattern recognition problems.

通过运用神经网络与线性拟合的方法，揭示了脯氨酸局部序列、肽链氨基酸组分对于顺式脯氨酸形成与否的影响，构造了基于局部序列和基于氨基酸组分的最优结构的神经网络，以及线性拟合方程，同时对顺式脯氨酸进行了筛选，结果表明，利用神经网络的方法可以提高顺式脯氨酸筛选时的信噪比，脯氨酸采取顺式还是反式构象与其局部的序列以及整条肽链的氨基酸组分均有较强的关联。

Development and application of stainless steel groove tube acid distributor for anode protection

叙述了硫酸装置中各种分酸器的特点，着重介绍了槽管式分酸器以及与阳极保护组合槽管式分酸器的实用性。

In this study, we used poly L-latcide, poly DL-latcide-co-glycolide 75:25 (PLGA7525) and poly DL-latcide-co-glycolide 50:50 (PLGA5050) during citric acid inducing ammonium bicarbonate gas forming process to form porous polymer film, and rolled the porous polymer film to make nerve conduits with pores and multi-layered. Electron Spectroscopy for Chemical Analyzer and Attenuated Total Reflectance – Fourier-Transform Infrared Spectrometer were employed for determining elements' functionabilities and chemical compounds. Charge Coupled Device camera and Scanning Electron Microscope were employed for macroscopic and microscopic morphologies and structural observation. Differential Scanning Calorimetry was employed for measuring glass-transition temperature. Nano-indentation system was employed for measuring elastic modulus and hardness. Biodegradation and water absorption ratios were measured to analyze their chemical properties and SEM was employed for microscopic morphology of the tested nerve conduit.

本研究将以聚乳酸、聚乳酸-聚甘醇酸共聚合物（75：25）、聚乳酸-聚甘醇酸共聚合物（50：50）做为研究材料，以柠檬酸诱发碳酸氢铵发泡之气泡成型法制作具有相连通孔隙之高分子薄膜，再将高分子薄膜卷制成特殊多层的导管，制作具有多层孔隙之新型神经再生导管，以电子能谱化学分析及减弱式全反射-傅立叶转换红外线光谱分析进行成份分析及化学元素测定；以电荷耦合元件摄影机、扫瞄式电子显微镜进行多层孔隙型神经导管巨观及微观形态结构观察；以示差扫瞄热量量测分析玻璃转换温度、奈米三维量测弹性模数及硬度；以及进行降解性质测定，并以扫瞄式电子显微镜进行降解后之导管微观结构形态观察。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷