查询词典 3-Pentanone
- 与 3-Pentanone 相关的网络例句 [注：此内容来源于网络，仅供参考]
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Second,2-methyl-1-phenyl-1-pentanone was synthesized with benzene and isocaproyl chloride in the presence of anhydrous aluminum chloride as a catalyst .
其次，以无水三氯化铝为催化剂，苯与2-甲基戊酰氯反应合成了2-甲基-1-苯基-1-戊酮
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A new method for the synthesis of 1 methyl 3 propyl pyrazol e 5 carboxlic acid from 2 pentanone and diethyl oxalate is reported.
以 2 -戊酮和草酸二乙酯为起始原料，经缩合、与甲基肼环合、水解等三个步骤合成了 1 -甲基-3-丙基吡唑-5 -羧酸。
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A GC headspace injection method for the determination of residual organic solvents such as methanol, ethanol, acetonitrile, dichloromethane, ethylacetate, 4 methyl 2 pentanone, toluene, DMF, chloroform and tetrahydrofuran in tazobactam was established.
建立了气相色谱顶空进样法测定三唑巴坦中甲醇、乙醇、乙腈、二氯甲烷、乙酸乙酯、甲基异丁基酮、甲苯、N ，N′-二甲基甲酰胺、氯仿和四氢呋喃等有机溶剂的残留量。
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The results of asymmetric reduction of latent chiral ketones by carbonyl reductase showed that the enzyme had a high specificity for pentanone in aliphatic ketones and for the acetophenone derivates that contained a withdrawing group at α-position.
利用羰基还原酶不对称催化还原潜手性酮类化合物发现，对于芳香酮类化合物，酶对α位为强电负性基团的底物专一性较强；对于脂肪酮类化合物，酶对五碳脂肪酮的专性较高。
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The fact that the compound, 2-methyl-2-di- methylaminomethyl-5--n-pentylidenecyclo- pentanone hydrochloride (T60) possessed little anticancer activity indicated that the Mannich bases that could formed a methylene group were necessary for anticancer activity.
当环戊酮环上的Mannich碱侧链位置上引入取代基时，抗癌活性显著降低，如化合物2-甲基-2-二甲胺甲基-5--亚戊基环戊酮盐酸盐（T60）几乎无抗癌活性。这说明Mannich碱能形成亚甲基是这类化合物产生抗癌活性所必不可少的条件。
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One of these compounds, 2-diethyl- aminoethyl-5--(4-methoxybenzylidene) cyclo- pentanone hydrochloride (T81) possessed sig- nificant antiinflammatory and analgesic ac- tivity when administered orally.
Ⅲ类化合物完全无抗癌活性，对其中一个化合物2-二乙胺乙基-5--（4-甲氧基苯亚甲基）环戊酮盐酸盐（T81）试验结果表明，它经口给药时具有显著的抗炎、镇痛活性。
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By the bio-assay directed fractionation of the volative constituents.dimethyl disulfide,allyl methyl trisulfide,allyl methyl sulfide and diallyl disulfide were found to increase the beating rate and beating amplitude in a standard medium,but the compund 2-pentanone without sulfide did not affect either of them.
从具有生物活性的挥发性提取物中分离得到的二甲基二硫、烯丙基甲基三硫、烯丙基甲基硫醚和二烯丙基二硫对培养心肌细胞心率和振幅均有不同程度的增强作用，而不含硫的2-戊酮则没有作用。
- 推荐网络例句
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You can do some assertiveness training.
你可以进行一些自信训练。
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We were well on the path to making a rear-wheel-drive global platform," says Mays."
我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"
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F: I think the oval shape suits you well.
我觉得这副椭圆形的可能很适合你。