醋化

They are prepared starting from natural and renewable sources such as cotton flakes and wood pulp through an esterification process with acetic anhydride.

他们准备从自然和可再生能源如棉花片和木浆通过酯化反应过程的醋酸酐。

The catalytic esterification of acetic anhydride and nine phenols were investigated in the presence of complex resin catalyst at 20 ℃,and its mechanismes were discussed.

研究了 2 0℃时，醋酸酐与九种酚在复合树脂催化剂下的催化酯化反应，并探索了其反应的机理。

Combine traditional aromatic vinegar production technology,draw lessons from the Miao nationality folk health care acetic acid processing technology and prescription,beverage of "dark dense tea",regard big date and polished glutinous rice as and ferment the main material,mix with leaf of the ginkgo,licorice root,ginger,Matrimony vine,etc.

结合传统香醋生产工艺，借鉴苗族民间保健醋酸饮料"黑密茶"的加工工艺和配方，以太谷大枣和糯米为发酵主料，配以银杏叶、甘草、生姜、枸杞等参与发酵，并采用根霉糖化、活性干酵母酒化和醋酸发酵，生产出具多种功能因子的新型醋酸饮料。

Strains of Acetobacter spp., which produces acetic acid fast with high transformation rate, are separated from Acetobacter powders from market and vinegar fermentation medium of Wuhan Jinchun Condiment Factory. Three of them are used to produce Carica papaye vinegar and get a good effect.

以大米糖化汁培养基为筛选培养基，从市售的醋酸菌粉和武汉锦春调味品厂的醋醅中分离得到了8株产酸快，转化率高的醋酸菌，并以其中的3株试制木瓜果醋取得了良好的效果。

Enterprises since its establishment has been successful in research and development with all the independent intellectual property rights, applies to health care products, medicines, wine, food, condiments and meat products industry are as follows: 1, health care products, pharmaceuticals categories: functional monascus 2 liquor raw materials categories: pure natural compound sweet juice, super-concentrated compound caproic acid bacilli, compound purification of enzyme, esterification monascus; 3, meat and food coloring agent categories: red rice, Monascus pigment; 4 , soy sauce, sauce products, vinegar fermentation aroma hyperchromic Qu: Monascus fermentation, saccharification by Qu Xiang

企业成立以来，已成功研究开发出具有全部自主知识产权，应用于保健品、药品、酿酒、食品、调味品和肉制品行业的产品系列如下：2、白酒原辅料类：纯天然复配甜味汁、超浓缩复合己酸菌液、复合净化酶、酯化红曲；3、肉制品及食品着色剂类：红曲米、色素红曲；4、酱油、酱制品、食醋发酵增香增色曲：发酵红曲、糖化增香曲

In this paper,one superior Aspergillus niger, which could secrete saccharifying enzym with high activity,was selected from Hexi savory vinegar material by useing the transparents ring as elementary index and saccharifying enzymic activity as secondly index.

采用透明圈法进行初筛，以糖化酶活力为复选指标，从接霉制曲后的河溪香醋原料醅中筛选到1株产糖化酶活力高的优势黑曲霉。

Respectively, glutamic acid derivatized β-CD has been synthesized with epoxy chloropropane as the intermediate, a water-insoluble yellow liquid was got after the acetylating of the by using acetic anhydride, which was used as a novel gas chromatographic CSP; A water-soluble β-CD polymer cross-linked with epoxy chloropropane has been synthesized, and the derivatives of β-CD polymer were synthesized by its alkylating and acetylating. The different β-CD derivatives were coated on silica capillary columns by dynamic method, the chromatographic properties and retention behaviors of the fused silica capillary columns were studied, the results showed that the β-CD derivatives had good stereoselectivity and separation results to some compounds, especially to various positional isomers and enantiomers.

本文还分别以环氧氯丙烷为中间体，合成了七{2，6-二-O-[3-(1，3-二羟基丙氨酸)]}-β-环糊精，再用醋酸酐将其乙酰化，得到了一种淡黄色粘稠液体，合成了一种新型的环糊精衍生物；以环氧氯丙烷作交联剂合成了一种水溶性的β-环糊精聚合物，再将其烷基化和酰基化，合成了β-环糊精聚合物的不同衍生物，用动态法将不同类型的β-环糊精衍生物涂渍在石英毛细管柱上，通过对所制备柱柱性能的测试和对一系列化合物的分离和保留行为的研究，结果表明所合成的β-环糊精衍生物对各类化合物，特别是对位置异构体和对映异构体具有较好的分离效果，显示了很强的立体选择性。

Determination of its content by idometry is performed and the effect of acidifying with acetic acid and hydrochloric acid on the result of the test is investigated.

采用碘法滴定测其含量，并探讨了醋酸酸化和盐酸酸化对测定结果的影响。

Methods: 2ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2ethyl5nitro aniline. The product was then synthesized to 3methyl6nitro1Hindazole by using ringclosing reaction in the presence of NaNO2, and then ethylated to obtain 2,3diethyl6 nitro2Hindazole. The latter compound was then reduced by SnCl2/Hcl to get target compound 2,3diethyl6nitro2Hindazole.

以2乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2乙基5硝基苯胺，后用亚硝酸钠关环得3甲基6硝基1H吲唑，经硫酸二甲酯甲基化得2，3二甲基6硝基2H吲唑，最后用氯化亚锡将其还原得到目标产物，通过1H NMR确定结构与目标产物一致。

Methods: 2-ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2-ethyl-5-nitro aniline. The product was then synthesized to 3-methyl-6-nitro-lH-indazole by using ring-closing reaction in the presence of NaNO2, and then ethylated to obtain 2, 3-diethyl-6- nitro-2H-indazole. The latter compound was then reduced by SnC12/Hcl to get target compound 2, 3-diethyl-6-nitro-2H-indazole.

以2-乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2-乙基－5-硝基苯胺，后用亚硝酸钠关环得3-甲基－6-硝基－1H-吲唑，经硫酸二甲酯甲基化得2，3-二甲基－6-硝基－2H-吲唑，最后用氯化亚锡将其还原得到目标产物，通过1HNMR确定结构与目标产物一致。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。