查询词典 acid

Sesame oil also contains a lot of linoleic acid, palmitic acid, arachidic acid and other unsaturated fatty acids.

芝麻油中还含有大量的亚油酸、棕榈酸、花生酸等不饱和脂肪酸。

The types included palmitic acid, monounsaturated fatty acid and unsaturated oleic acid which is found in olive and grapeseed oils.

这些脂肪种类中包括棕榈酸、单不饱和脂肪酸和富含于橄榄油和葡萄油中的不饱和油酸。

Accordingly, the16-carbon acid with one double bond is hexadecenoic acid and has thetrivial name palmitoleic acid.

据此，有一个双键的16C酸即为hexadecanenoicacid十六稀酸，俗名称为棕榈油酸。

The optimum conditions were obtained as follows: the weight ratio of fatty acids and 85%acetic acid is 1:4, ozonolysis temperature is 20-25℃, manganese/copper acetate as catalyst, and the amount of catalyst is 0.15% of fatty acids, oxidation decomposition temperature and oxidation decomposition time are 90-95℃ and 4 hours respectively. the yields of azelaic acid and pelargonic acid are 57.4% and 51.6% respectively.

以菜油酸为原料、85%醋酸水溶液为溶剂，经臭氧化、氧化分解、重结晶等过程制备壬二酸和十三烷二酸的最佳反应条件为：m：m(85%醋酸)=1：4，臭氧化温度20-25℃；氧化分解温度80-85℃，催化剂醋酸锰/醋酸铜用量为原料菜油酸质量的0.12%，氧化分解时间3h，重结晶溶剂壬酸的用量为5倍质量的氧化分解产物时，十三烷二酸的收率为58.3%，壬二酸的收率为57.2%。

Factors were reviewed, and optimum conditions was obtained,these experiments provide effective data for industrial manufacture.On the condition of using fatty acids of cottonseed oil as raw material,85% acetic acid as solvent,this paper prepared azelaic acid and pelargonic acid by ozonolysis, oxidation decomposition , extracted by boiling water,active carbon absorpting etc.

以棉油酸为原料、85%醋酸水溶液为溶剂，经臭氧化、氧化分解、沸水萃取、活性炭吸附脱色等过程制备壬二酸的最佳反应条件为：m：m(85%醋酸)=1：4，臭氧化温度20-25℃；氧化分解温度90-95℃，催化剂醋酸锰/醋酸铜用量为原料棉油酸质量的0.15%，氧化分解4h，壬二酸收率为57.4%，壬酸收率为51.6%。

In order to check the corresponding compound at 31P NMR –45.4 ppm, stable pentacoordinate spirobicyclic 2-phenoxy-1,3-phenylene-dioxo-1,3,2-iminoacetoxyphosphoranes were synthesized through a new and efficient method whereby phosphorus pentachloride was displaced stepwise by catechol, N,O-bisamino acid and phenol, or catechol, phenol and N,O-bisamino acid, their 31P NMR chemical shifts are at about 31P NMR –45.0 ppm, the results showed that the compound 4 at 31P NMR –45.4 ppm was pentacoordinate phosphorane containing amino acid residue.

采用磷谱跟踪来研究上述成肽反应机理。例如在氮气保护下，0.1mmol O，O-亚苯基磷酰氯（1）和0.15mmol N，O-二苯丙氨酸（2）苯溶液加入0.6ml核磁管中，混合均匀，反应过程用磷谱检测。反应1分钟后，起始原料1(δp=19ppm)很快转变成N-磷酰苯丙氨酸的三甲基硅基酯（3）(δp=19.8ppm)，在8分钟内，3完全转变成苯丙氨酸磷烷4(δp =-45.4ppm)，同时出现环磷三酯（6）(δp=3.5ppm)。随着反应的进行，对应于化合物4的峰逐渐变小，而6逐渐变大。

Our main product are as follows: soda ash, phosphoric acid, selenium powder, pentaerythritol, phthalic anhydride, maleic anhydride, tartaric acid, glycerine, sodium acetate, lauric acid Lane Company by virtue of modern mode of operation, strict management system, excellent quality, reasonable price and professional service system, would like to warmly at home and abroad to cooperate sincerely with old and new customers, create brilliant!

我司主打产品如下：纯碱，磷酸，硒粉，季戊四醇，苯酐，顺酐，酒石酸，甘油，醋酸钠，月桂酸莱恩公司凭借现代化的运作模式、严谨的管理体制、优良的质量、合理的价格、专业化的服务体系，愿热忱与国内外新老客户精诚合作，共创辉煌！

Ethyl alcohol, 3-methyl-4-oxo- pentanoic acid, acetic acid butyl ester, 2-methyl-butanoic acid ethyl ester, diethyl phthalate,-2,4-Decadienal were the same volatiles d from the 10 cultivars.

其中共有组6种，为乙醇、3-甲基-4-羰基戊酸、乙酸丁酯、2-甲基丁酸乙酯、邻苯二甲酸二乙酯、-2，4-癸二烯醛。

Diphenolic acid;DPA;4,4-bis(4-hydroxyphenyl) pentanoic acid;4-bydroxy-γ-(4-hydroxyphenyl)benzenebutanoic acid

学名 4，4-双（4-羟苯基）戊酸。从水中析出晶体。工业品为淡棕褐色颗粒。

Results: When the proportion of acetic acid and hydrogen peroxide was 2:1,the catalyst sulfuric acid used was in the range of 30～50 g/L,the reaction temperature was 25℃ and the reaction time was 24 h,the product had highest peracetic acid content.

结果，乙酸与过氧化氢质量比为2：1时，催化剂硫酸用量在30g/L~50g/L范围内，反应温度25℃和反应时间24 h综合条件下，产出过氧乙酸含量最高。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。