• 上述条件下甲酸丙酯产率70.5%。

    Under this conditions, the yield of propyl benzoate reached 70.5%.

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  • 主要成份:去离子水氢化聚癸烯、对羟基苯甲酸、对羟基苯甲酸丙酯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.

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  • 幼儿吸收防腐剂)对羟基甲酸丙酯对羟基苯甲酸类防腐剂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.

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  • 上述条件下,对羟基苯甲酸率为87.5%,羟基苯甲酸丙酯的产率为89.2%,对羟基苯甲酸的产率为91.1%。

    Under these conditions, yields of 87.5%, 89.2%and 91.1%can be reached for the ethyl ester, propyl ester, and butyl ester, respectively.

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  • 上述条件下,对羟基甲酸率为87.5%,羟基苯甲酸丙酯产率为89.2%,对羟基甲酸的产率为91.1%。

    Under these conditions, yields of 87.5%, 89.2%and 91.1%can be reached for the ethyl ester, propyl est...

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  • 研究蔗糖及壳聚糖为涂膜剂,并配合防腐剂羟基苯甲酸丙酯青椒进行涂膜保鲜处理,观察青椒在贮藏期间硝酸盐含量的变化。

    The preservation of green peppers by using sucrose ester, chitin and propyl-p-hydroxybenzoate was studied, and the nitrite content of green pepper during storage was analyzed.

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  • 它们乙酸苯甲醛、正葵14-甲基十五烷酸三醇甲酸69-十八碳二烯酸甲角鲨烷硬脂二十烷基油酸

    They were acetic acid, benzaldehyde, n caproic acid, 14 methyl pentadecanoic methyl ester, glycerin, benzoic acid, 6,9 octadecadienoic methyl ester, squalane, stearic acid and oleic eicosyl ester.

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  • 呋喃甲酸为原料,氧化亚锡为催化剂合成了呋喃甲酸丙酯率可达77% 。

    The way using crude material furoic acid and propyl alcohol to synthesize propyl furoate is researched by catalyst stannous oxide. The yield is 77%.

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  • 研究染色条件对苯二甲酸PTT纤维上染率、纤维截面直径力学性能回弹性影响

    It was studied that the effects of dyeing conditions on the dye-uptake, cross sectional diameter, mechanical properties, and elastic recovery properties of PTT filament.

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  • 主要介绍聚对苯二甲酸丙PTT单体聚合体纤维制备方法及其性质对PTT纤维应用前景进行了探讨。

    In this paper, a review on the prepairing technology of the monomer, polymer and fiber of PTT and their properties have been given, and the application future of PTT fibers has been discussed.

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  • 本文利用对叔丁基甲酸四异正硅酸乙合成了钛新型考察了此类成核剂的性能

    In this paper, a kind of new titanium nucleating agents were prepared by isopropyl titanate, p-tert-butyl-benzoic acid and tetraethyl orthosilioate, and their performance were investigated.

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  • 本文利用对叔丁基甲酸四异正硅酸乙合成了钛新型考察了此类成核剂的性能

    In this paper, a kind of new titanium nucleating agents were prepared by isopropyl titanate, p-tert-butyl-benzoic acid and tetraethyl orthosilioate, and their performance were investigated.

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