该物质以对羟基苯甲酸为原料，经三步合成。
The substance was synthesized from P-hydroxybenzoic acid through three steps.
苯丙烯酸的生物毒性大于对羟基苯甲酸。
Cinnamic acid had more greater action intensity than p-hydroxy benzoic acid.
二羟基苯甲酸甲酯（6）；
这是一个没有对羟基苯甲酸酯类天然产物。
不含染料，香水，羊毛脂，对羟基苯甲酸酯和甲醛。
用于制备3，4，5-三羟基苯甲酸甲脂的混合催化剂。
Mixed catalyst for preparing methyl ester of 3,4,5-trihydroxybenzoic acid methyl ester.
微量热法研究漆酶和3，4，5-三羟基苯甲酸的反应。
Studies on the Reaction Between Laccase and 3,4,5-Trihydroxybenzoic Acid by Microcalorimetry.
不含羟基苯甲酸，十二烷基硫酸钠，矿物油或合成染料。
Contains no parabens, sodium lauryl sulfate, mineral oil or synthetic dyes.
不含防腐剂、人工色素、香料、矿物油，对羟基苯甲酸甲酯、矿油。
Free of preservatives, artificial color, fragrance, mineral oil, parabens, petroleum.
研究了对羟基苯甲酸钴和对羟基苯甲酸镍对天然橡胶与黄铜粘合的影响。
The effect of cobalt and nickel p-hydroxy benzoates on the adhesion between NRand brass was studied.
方法：以5 氯2 羟基苯甲酸甲酯为原料，经硝化、还原等九步反应合成。
METHOD: It was synthesized from methyl 5-chloro-2-hydroxyl benzoic acid via nine-step reaction with nitration, reduction, etc.
方法以对羟基苯甲酸为原料，经三步合成，即原料的醚化、酰氯制备和酰胺化。
Methods The substance was synthesized from P-hydroxybenzoic acid through three steps, those are etherification, preparation of acyl halide and amidation of the raw material.
介绍了七种合成间羟基苯甲酸（1）的方法，并对这些方法的优缺点进行了讨论。
Seven methods of synthesis ofm-hydroxybenzoic acid(1) were reviewed and their advantages and disadvantages were also discussed in this paper.
本发明使用由具体化学式表示的2- 羟基苯甲酸衍生物或其药学上可接受的盐。
The present invention uses the 2-hydroxybenzoic acid derivative represented by the specific chemical formula or its pharmaceutically acceptable salt.
在适宜的反应条件下，对羟基苯甲酸壳聚糖酯酯化度可达130%、得率80%以上。
Under optimum reaction conditions, esterification degree of para-hydroxybenzoate chitosan ester was 130%, and yield reached 80%.
本文研究了一种固体酸催化剂—阳离子交换树脂催化剂，用于对羟基苯甲酸的酯化反应。
In this paper, the strong acid ion exchange resins have been studied as the solid-acid catalyst for the esterification of 4-hydroxybenzoic acid.
氨基-5-羟基苯甲酸（AHBA）是微生物产生安莎类抗生素及其相关抗生素的必需前体。
The compound, 3-amino-5-hydroxybenzoic acid(AHBA), is the specific and indispensible starter unit for the biosynthesis of ansamycins in microbes.
本文研究了温度和紫外光对食品防腐剂山梨酸、对羟基苯甲酸乙酯的稳定性和防霉效果的影响。
In this paper, the affects of temperature and ultraviolet light on the stability and mildewproof effect of sorbic acid and ethyl-p-hydroxybenzoate used as food preserving agent, was studied.
分析了添加不同量的对羟基苯甲酸或对羟基苯甲酸甲酯对样品凝聚粒子含量及流变性能的影响。
The effects of the amount of additive on the coagulate particle contents and rheologic properties are analyzed.
以维生素C为催化剂， 对羟基苯甲酸和十六醇及十八醇为原料合成尼泊金十六酯与尼泊金十八酯。
Nipagin esters were synthesized by the esterification of dodecyl and octadecyl alcohol with p -hydroxybenzoic acid in the presence of vitamin C.
以2，4-二羟基苯甲酸甲酯为原料，经过氯代反应、水解反应、脱羧反应合成2，4-二氯间苯二酚。
The compound 2,4-dichlororesorcinol was obtained from the starting material 2,4-dihydroxybenzoate via chlorinated reaction, hydrolysis and decarboxylation.
主要成份：去离子水、氢化聚癸烯、对羟基苯甲酸甲酯、对羟基苯甲酸丙酯、丙烯酸共聚物、矿物油、香料。
INGREDIENTS: Deionized water, hydrogenated poly-decene, methyl p-hydroxybenzoate p-hydroxybenzoic acid propyl, acrylic acid copolymer, mineral oil, daily flavor.
对结构相似的苯酚、对羟基苯甲酸、对氨基苯甲酸等响应不灵敏，对结构差异较大的如维生素C等几乎无响应。
Structural analogs, such as phenol, p-hydroxybenzoic acid and p-aminobenzoic acid, only small responses electrode were observed. Moreover, structural unanalog vitamin C had almost no response.
最近的媒体报道，一批来自上海零度可乐原液中含有“对羟基苯甲酸甲酯”防腐剂，引发了大家对饮料安全性的关注。
Recent media reports that a batch of Coke Zero concentrate from Shanghai contained the banned preservative methyl-p-hydroxybenzoate sparked concern about the safety of beverages.
虽未最终证实，但暂时认为与乳腺癌的发病有关。诸多日用品里都能见到对羟基苯甲酸酯类-化妆品，面霜及任何护肤品。
It hasn't been proven definitively, but has been tentatively linked to breast cancer. You'll notice parabens in a lot of products — makeup, lotions and any body products.
以对羟基苯甲酸甲酯、1，4丁二醇为主要原料，经熔融酯交换合成介晶基元双-对羟基苯甲酸丁二醇酯（BBHB）；
Bis(p-hydroxybenzonic acid butanediolate)(BBHB)as mesogenic unit was prepared with methyl p-hydroxybenzoate, 1,4-butanediol and catalyst by melting transesterification.
以正辛醇为原料，合成1-溴辛烷，并将1-溴辛烷与对羟基苯甲酸甲酯反应，然后水解，得到了4 -辛氧基苯甲酸。
1-bromooctane was manufactured by n -octanol as material, and reacted with methyl o -hydroxybenzoate, the 4-octanoxy benzoic acid was obtained.
两岁幼儿吸收（防腐剂）对羟基苯甲酸丙酯和对羟基苯甲酸丁酯类防腐剂的数量可能会产生类雌激素风险，导致内分泌系统障碍。
The amounts that two-year-olds absorb from the [preservative] parabens propylparaben and butylparaben can constitute a risk for oestrogen-like disruptions of the endocrine system.
研究以焦性没食子酸衍生物2，3，4-三羟基苯甲酸为原料经过甲基化、水解、酸化和精制成2，3，4-三甲氧基苯甲酸。
Preparation method of 2,3,4-trimethoxybenzoic acid is introduced, which was synthesized from 2,3,4-trihydroxybenzoic acid by methylation, hydrolysis, acidification and purification.
研究以焦性没食子酸衍生物2，3，4-三羟基苯甲酸为原料经过甲基化、水解、酸化和精制成2，3，4-三甲氧基苯甲酸。
Preparation method of 2,3,4-trimethoxybenzoic acid is introduced, which was synthesized from 2,3,4-trihydroxybenzoic acid by methylation, hydrolysis, acidification and purification.
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