羟基酸

A method of capillary electrophoresis with tris (2,2′-bipyridyl) ruthenium electrochemiluminescence detection has been applied to the simultaneous determination of proline and hydroxyproline in human urine.

1引言胶原蛋白中常含有丰富的脯氨酸和羟脯氨酸，其中Hyp几乎为胶原蛋白所特有。在胶原蛋白代谢中，Pro通过羟基化形成Hyp，胶原蛋白降解释放的Hyp从尿中排泄[1]。

The target compound 1 was successfully prepared via esterification, reduction, bromization and cyanation processes by using L--malic acid (2), which is an inexpensive and easily available starting material. The overall yield was 56.7%.

以廉价、易得的L--苹果酸为起始原料，经酯化、还原、溴代和氰化四步反应得到目标化合物-4-氰基-3-羟基丁酸乙酯，合成总收率为56.7%。

Capric, lauric, myristic, palmitic and stearic acid were fatty acids chosen to study the effect of the length of hydrocarbon chains on properties of pigments.

脂肪酸部分中，以含有十、十二、十四、十六、十八个碳原子的羧酸为对象，考察了不同脂肪链长度的羧酸对颜料的改性效果。12-羟基硬脂酸和油酸与硬脂酸结构的差异导致颜料性能的变化。

By means of covalent coupling with the activation of 1-ethyl-3-(3-dimethyllaminopropyl) carbodiimide hydrochloride and N-hydroxysulfosuccinimide.

利用自组装技术将三巯基丙酸固定在金电极上，以1-乙基-3-（3-二甲氨基）碳二亚胺盐酸盐和N-羟基硫代琥珀亚胺作为活化剂，将甲基对硫磷抗体以共价键形式固定在三巯基丙酸自组装单分子膜修饰的金电极上，制备了一种免疫传感器。

At present,the synthesis of lignin that is not only a means,but Phenylalanine AmmoniaLyaseand Cinnamic acid 4-Hydroxylase(C4H),such as enzyme in the synthesis played a very important role.

目前认为木质素的合成途径不只一条，但苯丙氨酸解氨酶和肉桂酸4-羟基化酶(C4H)等酶在合成中起到了十分重要的作用。

The squaric acid, croconate acid, salicylic acid which contain hydroxy can form a big integration anion with Boron, assemble many lithium salts combining with the lithium ion which should have novel structure and a good electrochemical property.

方酸、克酮酸、水杨酸由于含有羟基，能与B形成大螯合阴离子，从而与锂离子可以组装成许多具有新颖结构和良好电化学性质的锂硼盐电解质。

The polyesters with terminal hydroxyl groups were prepared by condensation polymerization of adipic acid with 1,4-butanediol or ethylene glycol and, in some cases, a little amount of propylene glycol. The polyurethane thermoplastics were then prepared with the polyester, 4,4'-diphenylmethane diisocyanate and 1,4-butanediol.

采用己二酸、乙二醇(或加入少量1，2-丙二醇)和1，4-丁二醇制备了端羟基聚酯，并用该聚酯和4，4'-二苯基甲烷二异氰酸酯、1，4-丁二醇制备了聚酯型热塑性聚氨酯；考察了NCO/OH值、聚酯分子量等因素对热塑性聚氨酯的物理机械性能的影响。

The organic modification of nano-scale TiO_2 and the effect factors were studied by using dodecanoic acid and hexadecanoic acid as modifier.

本文选用月桂酸和棕榈酸作为改性剂，让羧基与TiO2的羟基以化学吸附的形式连接起来，使纳米TiO2表面改性为亲油性。

A new method for determination of ellagic acid content by UV spectrophotometry was studied.

鞣花酸又名六羟基联苯二酸二内酯，是一种高附加值的林产精细化工品。

Two synthetic routes starting from 1,3-dihydroxyacetone and formamidine acetate as well as imidazole-4,5-dicarboxylic acid as starting material were investigated, and the reductive reaction of ethyl imidazole-4-carboxylate was also investigated.

本文对以1，3-二羟基丙酮和醋酸甲脒为原料和以4，5-二羧酸咪唑为原料合成4(5)-羟甲基咪唑的两条工艺进行了研究并优化，同时对4(5)-羧酸咪唑乙酯的还原反应进行了探索性实验。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。