一酸的

The process of becoming acid or being converted into an acid .

变成酸或者被转变为一种酸的过程。

The invention provides a method for preparing D-asparagus fern ammoniac acid and alpha-alanine.

本发明提供了一种D-天冬氨酸及L-丙氨酸的制备方法，属酶工程领域。

An amino acid that is an intermediate in the conversion of ornithine to arginine.

一种氨基酸，在将鸟氨酸转为精氨酸的过程中作为中介物。

Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine.

酰亚胺源自氨的一种化合物，含有与一个二价酸基或者二个一价的酸基结合的氨基

The influences of different surfactants (sodium dodecyl sulfate, sodium cholate and sodium deoxycholate), different electrolytes (sodium phosphate monobasic, sodium tetraborate and 3-cyclohexylamino-1-propane sulfonic acid), buffer pH and organic modifiers on the determination of sialic acid were studied.

其次建立了一种测定唾液酸的在线富集CZE法，该方法用40 mM磷酸二氢钠为缓冲溶液电解质，通过将样品溶解在乙腈：水=2：1的样品基体中，进样时间增加到100 s来达到样品富集的效果，并考察了样品基体中乙腈浓度和进样时间对富集效果的影响，研究了用硼砂或3-环己胺-1-丙烷磺酸作为电解质、缓冲溶液pH值和有机修饰剂的加入对唾液酸检测的影响。

A method for forming an aqueous chlorine dioxide solution is disclosed which includes reacting in a reaction vessel an acid reaction solution containing a hydroxy carboxylic acid and a companion acid with an alkali metal salt of a chlorite ion.

本发明公开了一种生成含水的二氧化氯溶液的方法，其中包括在反应容器中让含有羟基羧酸和配对酸的酸的反应溶液与亚氯酸根离子的碱金属盐进行反应。

Cluster of differentiation 44(CD44) is a principal cell surface receptor for hyaluronate, a major component of extracellular matrices.

人类白细胞分化抗原作为一种粘附分子，主要与细胞外透明质酸结合，参与关节软骨基质中透明质酸的代谢，因而它与各种骨关节疾病包括大骨节病关系密切。

For the saturated aromatic aldehydes with malononitrile and barbituric acidit, the reaction was found to proceed very efficiently at room temperature giving excellent yields under ultrasonic irradiation, while for α,β-unsaturated aldehydes as well as p-phthalaldehyde with malononitrile and barbituric acid the reaction also proceeded smoothly at room temperature with good yields.

在超声波辐射下，不仅饱和芳香醛与丙二腈、巴比妥酸的一锅反应在室温下能高收率地进行，而对于α，β-不饱和醛以及二元醛与丙二腈、巴比妥酸的一锅反应也能在室温下顺利进行，获得较高的收率。

Any of several esters, other than the ethyl ester, of carbamic acid .

一种氨基酸，在将鸟氨酸转为精氨酸的过程中作为中介物。

By means of UV、IR and GC, we preliminarily analyzed the components, structures and content of the fatty acids in Trichosanthes kirilowii oil, and we also analyzed the structure of trichosanic acid .

并采用杂环化法衍生化瓜蒌仁油，应用气相色谱-质谱联用法对瓜蒌酸进行结构鉴定及含量测定，确定了瓜蒌酸的结构为C18：39c，11t，13c，采用峰面积归一化法计算出其相对质量分数为41.82%。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。