查询词典 molecular biology

Center for Ecology and Conservation Biology is primarily dedicated to education and research in ecology and conservation biology including paleoceanography, ecological economics, sensory biology, behavioral ecology of birds, behavioral ecology and insect sociobiology, evolutionary biology, ichthyology, forest ecology and biogeochemistry, mammalian population genetics, etc.

生态学与保护生物学中心致力于生态学与保护生物学的教学与研究，其研究领域包括古海洋学，生态经济学，感官生物学，鸟类行为生态学，行为生态学和昆虫社会生物学，进化生物学，鱼类学，森林生态学和生物地理化学，哺乳动物遗传学等。

In additional, there are forum that is set up to provide a place of communication.This website contain several parts, that is biology pandect, the origin of life, biology research, the material of life, enginery of biology, individual development, the development of colony, the world of biology.

该站涵盖了生物总论、生命起源、生物学研究、生命物质、生物机能、个体发展、群体发展以及生物世界等多个部分，涉及了史前生物、植物、动物、昆虫、微生物领域。

Center for Ecology and Conservation Biology is primarily dedicated to education and research in ecology and conservation biology including paleoceanography, ecological economics, sensory biology, behavioral ecology of birds, behavioral ecology and insect sociobiology, evolutionary biology, ichthyology, forest ecology and biogeochemistry, mammalian population genetics, etc.

生态学与保护生物学中心致力于生态学与保护生物学的教学与研究，其研究领域包括古海洋学，生态经济学，感官生物学，鸟？？？？？行为生态学，行为生态学和昆虫社会生物学，进化生物学，鱼类学，森林生态学和生物地理化学，哺乳动物遗传学等。

In this thesis,based on the DFT+NEGF first-principles method,we construct a lead-molecule-lead sandwich system with single benzene-based molecule to investigate the relationship between the structure and properties of the molecular devices and the factors that influence properties of the molecular devices.Our computational investigations on these molecular devices are primarily concentrated on the effect of contact geometry between molecules and electrodes,the effect of side groups,the effect of different torsion angle between two phenyl rings and the effect of external electric field.This thesis consists of five chapters:In Chapter one,we mainly introduce the research background and development of the molecular electronics,including the experimental fabrication of molecular electronic components and theoretical simulation methods.Afterwards we discuss the questions that need to be solved in this area.Finally,the main contents of this thesis are listed.In Chapter two,we introduce the theoretical methods used in this thesis, including the main first-principles calculation methods,i.e.,the Density-Functionmethod and nonequilibrium Green\'s function.

本论文拟采用密度泛函理论和非平衡格林函数相结合的第一性原理计算方法，选取苯基小分子作为研究对象，构建了金属电极/有机小分子/金属电极三明治结构体系，系统地研究了苯基分子器件结构的改变与分子电输运性质之间的关系以及影响分子器件电输运性质的相关因素，其中重点研究了分子与电极间可能的接触结构改变、官能团、分子间的扭转角以及外电场对苯基分子电输运性质的影响，本论文主要包括以下五个章节的内容：第一章为综述部分，主要介绍了分子电子学产生的背景、分子器件的研究意义、当前研究分子器件的实验和主要理论方法，以及目前在研究分子器件中存在的一些问题，最后给出了本论文的主要研究内容和技术路线。

The major contents contained genomics of medical and industrial important microbes; molecular technology used in uncultivable microbes; virus molecular genetics; Streptomyces molecular genetics; filament fungal molecular genetics; yeast molecular genetics and microbial breeding.

本课程主要讲解医学微生物及工业微生物代表菌株的基因组学；难培养微生物的分子生物学研究技术；病毒分子遗传学；链霉菌分子遗传学；丝状真菌分子遗传学；酵母分子遗传学及微生物育种等内容。

In this dissertation, the efforts were focused on design and synthesis of chiral tmsymmetrical urea, cholic acid and heteroaromatic molecular tweezers and their molecular recognition as well as enantioselective recognition. A series of useful and creative results have been obtained.Three new types of chiral molecular tweezers containing unsymmetrically disubstituted urea unit, four new types of chiral molecular tweezers based on steroid cholic acid and one type of heteroaromatic molecular tweezers involving multiple hydrogen-bonding site have been designed and synthesized.

本文致力于新型手性不对称脲、胆甾和芳杂环类分子钳受体的设计合成及其对阴离子、中性分子和手性分子的识别及对映选择性识别性能研究，取得了一系列具有重要学术意义与应用前景的创新性结果。

The organic molecules with it-conjugated structure are ideal structural units for molecular wires. The asymmetric electronic structure of the molecular junctions is the basic reason for molecular rectification. Rotaxanes and catenanes are ideal structural units for molecular switches. The operation principle of molecular field effect transistors is quantum tunneling, the metal/insulator/mental tunneling is mainly.

具有π-共轭结构的有机分子体系是构造分子导线的理想单元；分子结的电子结构不对称性是分子具有整流特性的根本原因；轮烷和索烃是构造分子开关的理想单元之一；分子场效应晶体管的工作原理是量子隧穿，主要是金属－绝缘体－金属间的隧穿效应。

The seed embryoes were penetrated by 〓 ion beams of 75 MeV/u and the seed endosperms were implanted by the proper degraded 〓 ions, and soluble protein of the seedling in M1 generation was divided into 5 sections to analyze their changes at different molecular weight. 1 In comparison with control, the relative content of the second section (molecular weight is heavier in all sections) of all irradiated materials got down, while the relative content of the fifth section (molecular weight is the lightest) of those went up. 2 The penetrating seeds made the relative content of the first section (molecular weight is the heaviest) and the third section (mid-molecular weight) drop, while the fourth section went up. Moreover, the changes of the third section and the fourth section of the penetrated materials were clearly different from those of the implanted materials. 3 The difference between implanted embryo and implanted endosperm existed in deeper dropping of the first section and higher rising of the fifth section on relative content of soluble protein of the latter. 4 On irradiated materials at lower doses, there were exceptional changes of soluble protein, it may be thought that there was excited effect of low dose.

1.75MeV／u 〓O〓离子经过适当降能后注入小麦种子的不同部位和贯穿整个种子，对其M1代幼苗的可溶性蛋白质组分以及电泳中不同区段蛋白质组分相对含量加以分析，结果表明：1）同对照相比，随着辐照剂量的增加，所有辐照材料第二区段蛋白质组分的相对含量下降；而第五区段蛋白质组分的相对含量升高。2）种子的贯穿处理，同时也引起第一区段和第三区段蛋白质组分相对含量的下降以及第四区段的升高；其中第三、四区段的变化明显区别于注入效应。3）注入胚和胚乳的区别在于后者第一区段蛋白质组分相对含量的较大下降和第五区段的较大提高。4）小剂量辐照的材料，可溶性蛋白质组分的变化异常，可能与低剂量辐射兴奋效应有关。

The invention adopts the technical proposal that the nucleation and process of growth of the molecular sieve are controlled properly by adding crystal seeds containing zeolite beta precursors in the synthetic process of the intergrowth molecular sieve for producing the intergrowth molecular sieve, wherein the proportion of intergrowth phases is adjustable, the synthesized intergrowth molecular sieve adopts the compositions including the following mole relation: nSiO2:Al2O3, where n is between 4 and 400 in the formula, and the method is characterized in that the intergrowth molecular sieve has more than two phases and an XRD diffraction pattern thereof has the d-space maximum value at the lengths of 13.58 -0.1, 11.50 -0.04, 11.21 -0.1, 10.04 -0.1, 9.47 -0.1, 9.09 -0.1, 7.56 -0.1, 6.6 -0.1, 4.5 -0.1, 4.16 -0.05, 3.98 -0.05, 3.86 -0.05, 3.76 -0.04, 3.53 -0.04 and 3.38 -0.02 angstroms, thereby solving the problems properly.

本发明通过采用在共生分子筛合成过程中，加入含β沸石前驱体的晶种，控制好分子筛的成核和生长过程，制备出了一种共生分子筛，其中共生物相比例可调，合成的共生分子筛采用包括以下摩尔关系的组成：nSiO 2 ∶Al 2 O 3 ，式中n＝4～400，其特征在于所述共生分子筛具有两种以上的物相，其XRD衍射图谱在13.58±0.1，11.50±0.04，11.21±0.1，10.04±0.1，9.47±0.1，9.09±0.1，7.56±0.1，6.6±0.1，4.5±0.1，4.16±0.05，3.98±0.05，3.86±0.05，3.76±0.04，3.53±0.04，3.38±0.02埃处有d-间距最大值的技术方案，较好地解决了上述问题。

The invention adopts the technical proposal that the nucleation and process of growth of the molecular sieve are controlled properly by adding crystal seeds containing MCM-22 precursors in the synthetic process of the three-phase intergrowth molecular sieve for producing the three-phase intergrowth molecular sieve, wherein the proportion of intergrowth phases is adjustable, and the synthesized three-phase intergrowth molecular sieve includes compositions having the following mole relation: nSiO2:Al2O3, where n is between 4 and 400 in the formula, wherein the three-phase intergrowth molecular sieve has more than two phases and an XRD diffraction pattern thereof has the d-space maximum value at the lengths of 13.58+-0.1, 12.35+-0.1, 11.21+-0.1, 10.04+-0.1, 9.09+-0.1, 8.83+-0.1, 6.6+-0.1, 6.17+-0.1, 4.5+-0.1, 4.09+-0.05, 3.98+-0.05, 3.86+-0.05, 3.76+-0.04, 3.64+-0.04, 3.47+-0.05, 3.38+-0.02, 3.29+-0.04, 3.19+-0.05 and 2.88+-0.1 angstroms, thereby solving the problems properly.

本发明通过采用在三相共生分子筛合成过程中，加入含MCM-22前驱体的晶种，控制好分子筛的成核和生长过程，制备出了一种三相共生分子筛，其中共生物相比例可调，合成的三相共生分子筛包括以下摩尔关系的组成：nSiO2∶Al2O3，式中n＝4～400，其中所述三相共生分子筛具有两种以上的物相，其XRD衍射图谱在13.58±0.1，12.35±0.1，11.21±0.1，10.04±0.1，9.09±0.1，8.83±0.1，6.6±0.1，6.17±0.1，4.5±0.1，4.09±0.05，3.98±0.05，3.86±0.05，3.76±0.04，3.64±0.04，3.47±0.05，3.38±0.02，3.29±0.04，3.19±0.05，2.88±0.1埃处有d-间距最大值的技术方案，较好地解决了上述问题。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？