查询词典 benzoic

Two sorts of polyacrylate derivates were designed and systhesized. One has benzoic acid groups linked to backbone via an alkyl chain of different length, the other has pyridyl groups at its side chain. On the basis of hydrogen-bonding between carboxyl and pyridyl groups, multilayer film was fabricated in mixed solvents. We studied the effect of either the composition of mixed solvents or length of alkyl chain on the structure of a multilayer film.

设计合成了两类聚丙烯酸酯类高分子，一种侧链含有通过不同个数的亚甲基和主链相连的苯甲酸基团，另一种侧链含有吡啶基团，基于羧基和吡啶基之间的氢键相互作用，在混合溶剂中制备了多层膜，并研究了溶剂组成与高分子侧链间隔基长度对多层膜结构的影响。

Results Six compounds were isolated and identified as:5α,8α-epidioxy-(22E,24R)-ergosta-6,22-dien-3β-ol,scopoletin,isofraxidin,p-hydroxy benzaldehyde,3,4,5-trimethoxy benzoic acid,protocatechuic acid ethyl ester...

结果得到6个化合物，分别鉴定为：5α，8α表二氧(22E，24R)麦角甾6，22二烯3β醇、东莨菪素、异秦皮啶、对羟基苯甲醛、3，4，5三甲氧基苯甲酸、原儿茶酸乙酯。结论化合物Ⅰ～Ⅵ均为首次从该属植物中分离得到。

Objective To establish a method of capillary gas chromatography for the determination of sorbic acid and benzoic acid in cake and pastry .

目的建立了糕点中山梨酸和苯甲酸的毛细管气相色谱检测方法。

Result The contents of sorbic acid and benzoic acid in soy and vinegar were analysed.

结果］分析了酱油及食醋中的山梨酸和苯甲酸加标的含量，回收率为96.25％～102.25％。

This article was to build a fast determination method for benzoic acid、 sorbic acid and saccharin sodium in food with high performance liquid chromatography.

本文旨在建立一种快速测定食品中苯甲酸、山梨酸、糖精钠的高效液相色谱法。

A method for simultaneously determining sorbic acid, benzoic acid and saccharin sodium in processed fishery product was established.

采用高效液相色谱法同时测定水产品中的山梨酸、苯甲酸、糖精钠，实验采用铁氰化钾和乙酸锌作沉淀剂，取得了良好的净化效果。

Benzoic acid and sorbic acid in vinegar were extracted by distillation and determined by high perform liquid chromatography.

摘 要：研究了一种用蒸馏法提取、高效液相色谱法测定食醋中苯甲酸和山梨酸的方法。

Benzoic acid, sorbic acid and saccharin sodium were determined in the same time by HPLC with UV detector.

通过加入适量沉淀剂除去样品中绝大部分蛋白质和脂肪后，用高效液相色谱法，由紫外检测器同时测定牛乳中苯甲酸、山梨酸和糖精钠。

To develop a solid phase extraction- high performance liquid chromatography method for determination of dehydroacetic acid,benzoic acid,sorbic acid in cake and pastry.

建立了固相萃取-高效液相色谱法测定糕点中的脱氢乙酸、苯甲酸、山梨酸的方法。

The study aimed to discuss the method of determining benzoic acid and sorbic acid content in the cooked meat pnxlucts by HPLC.

［目的］探索高效液相色谱法测定熟肉制品中苯甲酸和山梨酸含量的方法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。