查询词典 reduction

Methyl-2,3,5,6-tetrafluoro-benzene methanol was synthesized by chlorination, acylation, fluorination, esterifica- tion, reduction, bromization, reduction from terephthalic acid. Tefluthrin was obtained from-(1RS,3RS)-3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropa-necarboxylate acid by reacting with 4-methyl-2,3,5,6-tetrafluoro-benzene methanol.

以对苯二甲酸为原料，经氯化、酰氯化、氟化、酯化、还原、溴化、还原七步反应合成了4-甲基-2，3，5，6-四氟苄醇，甲基苄醇与-(1RS，3RS)-3-(2-氯-3，3，3-三氟丙-1-丙烯基)-2，2-二甲基环丙甲酸一步酯化合成了七氟菊酯。

Results: Arthroscopic examination showed that there were synovitis, debris and fibrillation in the joints of ADD with reduction; synovitis, synovial hyperplasia, debris, fibrillation, chondromalacia,fibrocartilage rupture and adhision in the joints of ADD without reduction.

76例84侧临床诊断为颞下颌关节盘前移位以及关节盘穿孔的病例进行颞下颌关节内窥镜检查。结果：可复性关节盘前移位的病例出现滑膜炎，关节腔内有絮状物，关节结节表面有纤维形成。

Results: Arthroscopic examination showed that there were synovitis, debris and fibrillation in the joints of ADD with reduction; synovitis, synovial hyperplasia, debris, fibrillation, chondromalacia,fibrocartilage rupture and adhision in the joints of ADD without reduction.

结果：可复性关节盘前移位的病例出现滑膜炎，关节腔内有絮状物，关节结节表面有纤维形成。不可复性关节结节表面纤维形成，关节软骨软化，软骨剥脱，同时伴有纤维粘连。

Reduction of ovule number as a tendency of speciation in the genus is substantiated by the occurrence of tri_ovulate cones coupled with comprehensive characters of the genus. The metamorphic patterns as well as the leaf nature of the outer envelope indicate that female cones of Ephedra are compound while the female reproductive units of the ovulate cone have been reduced from secondary reproductive shoots similar to those of cordaites by phylogenetic transformation, fusion and reduction. Each fertile bract together with its axillary female reproductive unit composed the Bract Scale and Seed Scale Complex of Ephedra .

基于返祖性畸形三胚珠球花的出现及其他形态特征，认为麻黄属胚珠数目减少是该属内物种特化的一个趋势；利用雌球花发育的畸形现象及外珠被的形态学本质提出麻黄属的雌球果为复轴性构造，雌性生殖单位是由类似于科达类的次级生殖枝构造经系统发育变态、融合、简化成现存的生胚珠构造式样，每一可育苞片及其腋内雌性生殖单位共同组成了麻黄属的苞鳞_种鳞复合体。

Experimental results indicate that the reduction of chemical oxygen demand were 40%, 38%, 12%, 50%, and 73% for β-naphtho1, salt R, dihydroxy salt R, acid red, and wastewater, respectively when the reactions had run for 4 h at a pH of 1.7. In comparison, the COD reduction of-naphtho1 and salt R were 10.2% and 16.2%, lower than 23.4% and 18.1% with H2O2, while the Fenton reaction time was 1 h.

当pH=1.7、反应4h时，β-萘酚、R盐、二羟基R盐、酸性红、实际废水的化学需氧量去除率分别可达40%、38%、12%、50%和73%；对比实验显示，反应时间为1h时，β-萘酚和R盐的COD去除率分别为10.2%和16.2%，而用H2O2则分别为23.4%和18.1%。

Microbial Cr reduction, dissimilatory iron reduction, paddy soil, Co-culture experiment

微生物铬还原，异化铁还原，水稻土，混合培养

Taking Shewanella and Geobacter as examples, this paper reviewed three kinds of possible mechanisms of microbial enzyme-catalyzed dissimilatory Fe reduction and its molecular regulation, i.e., direct contact between microbial cell and Fe oxides, siderrophores, and electron shuttling compounds. Many membrane-bound cytochrome proteins are involved in the dissimilatory Fe reduction, forming a complicated regulation network.

以希瓦氏菌和地杆菌为例，本文综述了3种异化Fe还原的酶促反应机制及其分子调控机理：异化Fe还原菌与Fe氧化物直接接触机制、电子穿梭体的作用机制、铁载体作用机制，多种膜蛋白特别是多血红素的细胞色素蛋白参与微生物的异化Fe还原过程，并形成复杂的调控网络。

The mechanism of electrocatalytic reduction, the classification and selection of electrode and catalyst and the effect of temperature, current density and pressure on the selective and Faradaic efficiency of reduction are discussed.

介绍了在水溶性介质中利用电化学催化的方法还原CO2的研究现状：电催化还原机理、电极材料催化剂的分类和选择；综述了温度、电流密度以及压力等对还原选择性和法拉第效率的影响；展望了CO2电催化还原方法的研究方向和应用前景。

The key intermediate 3-methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods,formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction,and then hydr...

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

The key intermediate 3- methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods, formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction, and then hydrolysis.

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。