• 苯二甲酸二作为一种香味使用时,其他的未被列出成分似乎仅仅是帮助发明这种古龙特殊香味并不意味着他们无害的。

    While DEP is used as a solvent in the fragrances, other unlisted ingredients seem to help create the cologne's particular scent -- but that doesn't mean they're harmless.

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  • 制备方法是以氯化铵催化剂,原甲酸为解,由和环己酮缩合合成。

    Cyclohexanone diethyl acetal was prepared from cyclohexanone with anhydrous ethanol as reactant, ammonium chloride as catalyst, triethyl orthoformate as water scavenger.

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  • 三聚氰胺通过混合物将其肌肉组织中提取出来的。

    Melamine is extracted from muscle tissue with a mixture of acetonitrile and water.

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  • 本文提出了腈- 醇-混合溶剂中以柠檬酸作络合剂, 三氯化还原溶性偶氮染料颜料

    Sodium citrate was used as a complex catalyst for the titanium trichloride to reduce insoluble azo dyes and pigments in acetonitrile-alcohol-water system.

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  • 三聚氰胺未改进基质的抗剂,本身会发生聚合反应,会造成纸张质量负面影响

    The water-resistance agent with melamine and un-improved glyoxal as matrices has negative effects on the paper quality because of the polymerization potential of its own.

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  • -(1:4)为流动

    The mobile phase consisted acetonitrile - water( 1:4).

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  • 硅酸钠酯、聚丙烯酰胺主要成分制备层。

    Hydrophilic membranes were prepared with key components of sodium silicate, acetic ether, polyacrylamide, etc.

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  • 合成还摒弃了剂。

    Ethyl and propyl gallate were synthesized without water carrying agent.

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  • 将杠柳枝粉末提取物悬浮后,依次石油正丁醇萃取

    The ethanol extract from the twig bark powder of Periploca sepium was suspended in water and successively treated with petroleum ether, ethyl acetate and n-butanol.

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  • 乳酸多种有机溶剂

    Ethyl lactate is partly miscible with water and most organic solvents.

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  • 决明子为原料,分别酯、正丁醇制备粗提取物。

    Juemingzi extracts were prepared with ethyl acetate, n-butanol and water respectively.

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  • 采用氨基键合硅胶腈-(75∶25)为流动使用示差折光检测器

    NH2 column was used with the mobile phase of acetonitrile-water (75:25). The differential refractive index detector was used.

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  • 重组酵母菌经冻干能有效地实现在非相中全细胞催化酯化合成己酸酯。

    We constructed a CALB-displaying yeast whole-cell biocatalyst and applied it to esterification from caproic acid and ethanol.

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  • 初始流动-(40:6 0)洗脱至主峰出保留时间2.3开始进行梯度洗脱比较合理

    The gradient elution is reasonable when the retention time is 2.3 times after the appearance of prominent peak with initial mobile phase acetonitrile-water (40:60).

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  • 采用高速逆流色谱法(HSCCC),以正己烷氯仿甲醇组成二相系统作为固定相与流动相,黄芪酯粗提物进行分离纯化

    Preparative high-speed counter-current chromatography (HSCCC) was used for the separation of calycosin and formononetin from the ethyl acetate extract of Astragalus membranaceus Bge.

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  • 黄芩:采用硅胶G板,以醋酸酯-丁酮-甲酸-(5:3:1:1)为展开剂,显色剂为1%三氯化铁醇溶液。

    Radix Scutellariae was examined by Silca gel-G, the mobile phase was ethyl acetate-butanone-formic acid-water (5:3:1:1).

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  • 性质黄色粉末溶于,不溶于,微溶于汽油

    Properties Grey white or light yellow powders, soluble in benzene, alcohol and ethyl acetate, insoluble in water, somewhat soluble in gasoline.

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  • 传统的解工艺采用酒精作为中间媒介促使硅酸酯与接触,进而发生解反应,生产硅酸解液。

    The alcohol is used as medium to generate hydrolyzate of ethyl silica te in traditional ceramic mold casting process.

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  • 采用溶胶—凝胶法,正硅酸异丙醇原料制备掺杂有机颜料酞菁玻璃表面装饰

    Decoration film on glass surface doped with phthalocyanine blue was prepared by sol-gel process using tetraethoxysilane, isopropanol and water as the raw materials.

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  • 实验表明,山稔子、无甲醇、50%甲醇、正己烷提取物猪油花生油具有抗氧化作用,而且其抗氧化作用的强弱与溶剂的极性直接相关。

    The results showed that all the water, alcohol, methanol, 50% methanol, n-hexane and acetic ester extracts have antioxidation on lard and peanut oil.

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  • 本文通过实验确定了40%草胺乳剂最佳配方粒径进行测定,研究了其稳定性

    The best formula of 40% acetochlor emulsion in water was ascertained and its particle size was measured. The cold and hot storage stability of the preparation were also studied.

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  • 通过对PMEW萃取分离发现,甲醇氯仿石油四种萃取物中仍以甲醇萃取最高。

    In four extracts from PMEW treated with methyl alcohol and water, petroleum ether, chloroform and ethyl acetate, extract rate of methyl alcohol and water was the highest.

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  • 通过对PMEW萃取分离发现,甲醇氯仿石油四种萃取物中仍以甲醇萃取最高。

    In four extracts from PMEW treated with methyl alcohol and water, petroleum ether, chloroform and ethyl acetate, extract rate of methyl alcohol and water was the highest.

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