查询词典 hydroxy acid
- 与 hydroxy acid 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Abstract—3b-Hydroxy-12-oleanen-27-oic acid was an antitumor active oleanane-type triterpenoid from the rhizomes of Astilbe chinensis.
摘要- 3B型-羟基- 12 - oleanen - 27 -乌苏酸是一个抗肿瘤活性齐墩果烷型三萜从根茎 astilbe中华。
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Twenty multiparous and ten primiparous Holstein cows were used to in- vestigate effects of supplementing dairy cow diets with Alimet (DL, 2- hydroxy-4- butanoic acid; HMB; Novus International Inc.) on DMI and milk production.
20多子和10头荷斯坦奶牛初产被用来在, vestigate补充与Alimet(消旋,2奶牛饲料的影响-羟基- 4 -丁酸; HMB;诺弗司国际公司) DMI和牛奶的生产。
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In comparison,the rhizobia in mature infected cells were larger,greater in number,varied in shape,and distributed throughout the nodule cells.The rhizobia in the mature cells also had poly-hydroxy butanoic acid and curapos.
成熟侵染细胞中,根瘤菌个体较大,数量较多,多呈棒状,少数为球形或椭球形,有很多根瘤菌还呈现明显的"T"形、"Y"形或"V"形,菌体占满了整个细胞,这时的根瘤菌大多数含有聚羟基丁酸和聚磷酸盐颗粒。
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Ethyl 4-[(1-hydroxy-1-methyl)ethyl]-2-propyl-1H-imidazole-5-carboxylate,the key intermediate of Olmesartan ,was synthesized from butanoic acid and o-phenylenediamine via condensation under microwave-irradiation,oxidation,esterification and the Gringard reaction.
用正丁酸与邻苯二胺为原料,在微波照射下缩合成2-丙基苯并咪唑,再氧化开环制得2-丙基咪唑二羧酸,再经酯化、Gringard反应制得抗高血压药物奥美沙坦的关键中间体2-丙基-4-[(1-羟基-1-甲基)乙基]-1H-咪唑-5-羧酸乙酯,总收率32.2%。
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The reaction between 2-hydroxy benzoic acid and 3-methyl-1-butanol using phosphotungstic acid as catalyst were studied and the best catayst amount, react'ratio and reaction time were also discussed.
研究以磷钨酸为催化剂,由水杨酸与异戊醇制备水杨酸异戊酯的工艺条件,找到最佳催化剂用量,最佳反应时间及醇酸摩尔比,并研究了带水剂对反应收率的影响。
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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。
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The title compound was synthesized from shikimic acid via eight steps, including esterification of acid, proctection of hydroxy etc., and partial procedure was modified for easy industrialization.
本论文参考文献方法,以莽草酸为原料,通过酯化,丙酮叉保护等六步反应合成了目标化合物,并对部分反应条件进行了优化。
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Two new active esters of acrylic acids monomers, N-p-acryloxybenzoyloxy succini-mide and N-p-methacryloxybenzoyloxy succinimide have been synthesized and polymerized.ABOSu and MBOSu were prepared by coupling of p-acryloxybenzoic acid or p-methacryloxybenzoie acid with N-hydroxy succinimide in the presence of dicyclohexylcarbodimide.
新的丙烯酸活性酯,N-(对甲基丙烯酰氧苯甲酰氧基)丁二酰亚胺及N-丁二酰亚胺单体分别由对甲基丙烯酰氧基苯甲酸、对丙烯酰氧基苯甲酸与N-羟基丁二酰亚胺在环已基羰二亚胺存在下经偶联反应合成。
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Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.
采用&一勺烩&方法,以4-羟基苯甲腈为起始原料,首先与硫氢化钠和无水氯化镁在N,N-二甲基甲酰胺中反应,所得中间体不经分离,直接加入2-氯乙酰乙酸乙酯进行环合反应,得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯(2);然后通过六亚甲基四胺/三氟乙酸进行Duff反应,得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯(3);再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。
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The result showed that the contents of p hydroxy benzoic acid,vanillic acid(extracted by 1mol·L -1 NaOH) in continuous cropping soil were significant higher than that in normal cropping soil,and the content of vanillin had no significant difference in these soils.
结果表明,重茬土壤中对羟基苯甲酸和香草酸的含量(1mol·L-1NaOH提取)大于正茬土壤,且差异达到极显著水平,香草醛含量差异不显著;重茬大豆根系水提液中对羟基苯甲酸、香草酸、阿魏酸、香草醛、香豆素含量均高于正茬。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。