查询词典 reduction

The key steps were Stetter reaction, regioselective reduction, substitute controlled asymmetric reduction and Paal Knoor reaction.

该方法不仅避开了专利方法，而且高效、原料便宜易得、成本低，具有很大的应用前景。

Methods:Fifty-six patients with metacarpal and phalangeal fractures who were reviewed in the study were divided into two groups:Group A and Group B.Thirty-two patients in Group A were treated with open reduction,Kirschner internal fixation and postoperative plaster splint external fixation.Other 24 patients in Group B were treated with open reduction,Mini-plate internal fixation,without any external fixation.

回顾分析经完整随访的56例掌指骨骨折患者的治疗和康复情况，A组：32例掌指骨骨折患者予以行切开复位交叉克氏针内固定接骨术，术后石膏夹板外固定；B组：24例掌指骨骨折患者予以行切开复位微型接骨板内固定接骨术，术后未用外固定。

Starting from chiral proline, pipecolinic acid, piperazine-2-carboxylic acid and 1,2-diphenyl amino alcohol, a series of structurally simple and easily prepared amides were developed as highly effective Lewis basic organocatalysts for the asymmetric reduction of imines with trichlorosilane as the reducing agent, which promoted the reduction of N-aryl imines with high yields and excellent enantioselectivities with an unprecedented substrate spectrum.

本文分别由手性脯氨酸、哌啶酸、哌嗪酸以及氨基醇出发，设计和合成了一系列结构新颖、合成简便、性能优良的酰胺类有机小分子路易斯碱催化剂，以廉价的三氯氢硅为氢源，用这些催化剂催化亚胺不对称还原，得到了非常优良的收率、对映选择性和前所未有的底物普适性。

The prevertebral heights increase is not unlimited between different reduction process of L1 fracture, and it is limited by spinal anatomy on the late phase of reduction. Knowing these features is useful for us to treat the patients and improve the devices.

L1骨折后在不同复位方式的复位过程中椎前高度不是无限制的增加，复位后期椎前高度都明显受到脊柱解剖结构的制约，因此在临床治疗或器械改进时，充分了解这些特点非常有益。

Finally, the countermeasures for risk control of urban disasters are presented from 8 aspects, including establishing a unionized legal system of urban safety planning, risk prevention and control, and crisis management; implementing urban plan of disaster prevention and reduction and incorporating into urban planning; perfecting the decision-supporting system and information management system for urban disaster risk; carrying on risk assessment mechanism in safety planning; speeding the construction of integrated management organization for disaster prevention; establishing a scientific and perfect emergency rescue system; intensifying safety education and propagand of disaster prevention and reduction; and strengthening the research and exchange in urban safety science.

该对策研究包括：建立城市安全规划、风险防范和危机管理法律体系；实施城市防灾减灾规划并融入城市规划中；完善城市灾害风险决策支持系统和信息管理系统；实行安全规划风险评价机制；加快防灾减灾综合管理机构建设；建立科学、完善的应急救援体系；加强安全教育和防灾减灾宣传；加强城市安全科学研究与交流。

Two different fading procedures were studied. One is the oxidation procedure on polyester fibers,the other is the reduction procedure on wool fibers.The study of oxidation procedure mainly focused on 11 disperse azo dyes and 11 disperse anthraquinone dyes. The study of reduction procedure mainly focused on 7 pyrazolone coupled acid azo dyes and 10 azo disperse dyes which has sulfonic group on the couple component.

本论文研究了11支偶氮型分散染料，11支蒽醌型分散染料在聚酯纤维上的分子结构与光牢度的定量关系，同时研究了7支以吡唑啉酮为偶合组份的偶氮型酸性染料和10支偶合组份上带有磺酸基的偶氮型酸性染料在羊毛纤维上的分子结构与光牢度的定量关系。

The reduction of activity of lime and the performance of dry slaking were studied in this paper. In the practical process, the reduction of activity of lime has important influence on lime's quality.

本文主要对循环悬浮式半干法脱硫工艺中生石灰的活性衰退以及干式消化性能进行了研究。

Reduction of N-substituted-4-nitrophthalimides(1)to the corresponding amines(2)was performed in hydrochloric acid at 40 ℃ using stannous chloride as reduction agent, yielding produc...

氮气保护条件下，2与乙醇在固体光气作用下生成(2 取代 1，3 二酮 2，3 二氢 1H 异吲哚 5 )氨基甲酸乙酯(3)，3的产率为67%～92%。各化合物的结构均经1H NMR、IR、元素分析和FAB MS证实。

In the course of reduction at about 1000℃,Fe_2O_3 and then Fe_3O_4 was almostcompletely transformed into Wüstite within a few minutes prior to the formationof metallic iron;but the reduction of Wüstite to metallic iron lasted a much lon-ger time.

在1000℃左右的还原过程中，在金属铁出现之前，在数分钟内Fe_2O_3和Fe_3O_4几乎都已全部还原成浮士体，但后者还原成金属铁的阶段，则须经历数十分钟之久，因此后一阶段便成为还原过程中控制的一步。

The major changes include sparse and short and loose microvilli of endodermal epithelium cells, a reduction in apical microvesicles and subapical storage vacuoles, swilling of the mitochondria and a reduction or disappear in its cristea, a decrease in rough endoplasmic reticulum, abnormation in pattern and structure of nucleus, an increased vacuolation in cells, an extend in the interval of adjacent cells.

电镜观察发现，剂量在50g/mL以上时，YS上皮细胞微绒毛稀疏变短，胞质中贮液泡减少，线粒体、内质网等内膜系统发生多种细胞病理学改变，细胞间隙增宽，连接复合体破坏。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。