检索结果-南通市图书馆

Mutagenic effect of cadmium chloride in wheat breeding

在线全文

学校读者我要写书评

暂无评论

Mutagenic effect of cadmium chloride In wheat breeding

Mathematical modeling of the aerodynamic coefficients of a sail blade

中国的遗传学研究——遗传学进步推动中国西部经济与社会发展——2011年中国遗传学会大会

作者： Shulembaeva K.K. Chunetova zh.zh. Omirbekova N.zh. zh.ssupova A.i. Kazakh National University named after al-Farabi

Chemical mutagens are effective in solving the formative processes in wheat breeding and obtaining selectionally-significant deviations.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Advances in Aerodynamics 2023年第1期5卷 267-281页

作者： Akmaral zh.Tleubergenova Nazgul K.Tanasheva Kulzh.n M.Shaimerdenova Serik S.Kassymov Asem R.Bakhtybekova Nurgul N.Shuyushbayeva Saule zh.Uzbergenova Gulden A.Ranova Department of Engineering Thermophysics named after Professor zh.S.Akylbayev E.A.Buketov Karaganda UniversityKaraganda 100028Kazakhstan Scientific Research Center“Alternative Energy” E.A.Buketov Karaganda UniversityKaraganda 100028Kazakhstan Department of Science E.A.Buketov Karaganda UniversityKaraganda 100028Kazakhstan Department of Mathematics and Physics Sh.Ualikhanov Kokshetau UniversityKokshetau 020000Kazakhstan Department of Engineering Technologies and Transport Sh.Ualikhanov Kokshetau UniversityKokshetau 020000Kazakhstan

The authors of the work numerically studied the aerodynamic coefficients of the sail blade,during which the patterns of three-dimensional flow around airflow and the pressure distribution field were *** triangular sail blade is used as the power element of wind *** sail blade modeling was based on the Reynolds-averaged Navier-Stokes equations(RANS)using the ANSYS FLUENT computer program.A flow pattern is obtained,which gives a physical explanation of the nature of the airflow around the sail blade and the pressure distribution *** analyses of theory and experiment are *** the range of Reynolds numbers from 0.5×10^(4) to 2.5×10^(4),the change in the drag force coefficient is from 1.04 to 0.54,and the difference in the lift force coefficient is from 0.52 to 0.33.

关键词： Sail blade Wind turbine Modeling ANSYS FLUENT Aerodynamic coefficients

Crop Breeding Chips and Genotyping Platforms： Progress, Challenges, and Perspectives

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2017年第8期10卷 1047-1064页

作者： Awais Rasheed Yuanfeng Hao Xianchun Xia Awais Khan Yunbi Xu Rajeev K. Varshney zh.onghu He institute of Crop Sciences National Wheat Improvement Center Chinese Academy of Agricultural Sciences (CAAS) Beijing 100081 China international Maize and Wheat improvement Center (CiMMY-F) c/o CAAS Beijing 100081 China Department of Plant Pathology and Plant-Microbe Biology Cornell University Geneva NY USA international Crops Research institute for the Semi-Arid Tropics (iCRiSAT) Patancheru 502324 India

There is a rapidly rising trend in the development and application of molecular marker assays for gene map- ping and discovery in field crops and trees. Thus far, more than 50 SNP arrays and 15 different types of genotyping-by-sequencing （GBS） platforms have been developed in over 25 crop species and perennial trees. However, much less effort has been made on developing ultra-high-throughput and cost-effective genotyping platforms for applied breeding programs. in this review, we discuss the scientific bottlenecks in existing SNP arrays and GBS technologies and the strategies to develop targeted platforms for crop mo- lecular breeding. We propose that future practical breeding platforms should adopt automated genotyping technologies, either array or sequencing based, target functional polymorphisms underpinning economic traits, and provide desirable prediction accuracy for quantitative traits, with universal applications under wide genetic backgrounds in crops. The development of such platforms faces serious challenges at both the technological level due to cost ineffectiveness, and the knowledge level due to large genotype- phenotype gaps in crop plants. it is expected that such genotyping platforms will be achieved in the next ten years in major crops in consideration of （a） rapid development in gene discovery of important traits, （b） deepened understanding of quantitative traits through new analytical models and population designs, （c） integration of multi-layer -omics data leading to identification of genes and pathways responsible for important breeding traits, and （d） improvement in cost effectiveness of large-scale genotyping. Crop breeding chips and genotyping platforms will provide unprecedented opportunities to accelerate the development of cultivars with desired yield potential, quality, and enhanced adaptation to mitigate the effects of climate change.

关键词： Single nucleotide polymorphisms (SNPs) Genotyping-by-sequencing (GBS) SNP arrays Crop breeding Genotyping platforms

ENDOTOXiN REMOVAL BY MEMBRANE AFFiNiTY CHROMATOGRAPHY

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1995年第10期6卷 919-922页

作者： Guo, W Shang, zh.Yu, YN zh.u, LM Zun, ZY Ma, LR Chen, MY Chinese Acad Sci Dalian Inst Chem Phys Dalian 116012 Peoples R China Acad Mil Med Sci Inst Radiat Med Beijing 100850 Peoples R China

Endotoxin was removed by membrane affinity chromatography. Macropore cellulose membrane was prepared from filter paper by alkaline treatment and chemical crosslinking, and was used as stationary phase for affinity chromatography. The matrix membrane was derived by hexamethylenediamine and activated by glutaraldehyde before histidine was immobilized as affinity ligand. A membrane cartridge containing 40 sheets of affinity membrane was also prepared, which can be used to remove pyrogen from aqueous solutions.

关键词：

磷化电流密度对A286合金电化学磷化膜组织结构和结合强度的影响

在线全文

学校读者我要写书评

暂无评论

材料保护 2024年第2期57卷 128-133,147页

作者：胡勇周昊杜孟飞曾宇乔张旭海方峰东南大学材料与科学工程学院江苏南京211189 宝钢金属有限公司上海200940

A286合金表面易钝化,通过传统化学磷化方法在其表面难以沉积磷化膜,而电化学磷化可避免钝化膜对磷化反应的抑制作用。因此,研究磷化电流密度对磷化膜组织结构和性能的影响规律很有必要。通过电化学磷化首次在A286合金表面形成了致密、... 详细信息

A286合金表面易钝化,通过传统化学磷化方法在其表面难以沉积磷化膜,而电化学磷化可避免钝化膜对磷化反应的抑制作用。因此,研究磷化电流密度对磷化膜组织结构和性能的影响规律很有必要。通过电化学磷化首次在A286合金表面形成了致密、高膜基结合力的磷化膜。利用电化学工作站对不同电流密度下磷化过程中电位-时间(ϕ-t)曲线进行测绘,研究电化学磷化膜生长过程的特点;使用扫描电子显微镜(SEM)观察磷化膜的显微组织形貌;使用能谱仪(EDS)分析磷化膜中不同区域的化学成分;使用X射线衍射仪(XRD)研究磷化膜的物相结构;使用划痕仪测定磷化膜与基体的结合力。结果显示:A286合金电化学磷化膜的沉积模式为逐层生长-堆叠的形式。低电流密度下,磷化膜为单一的Hopeite相,组织结构粗大、疏松,膜基结合力约为6 N。随着磷化电流密度的增加,磷化膜逐渐转变为Zn+Hopeite复相,组织结构细化、致密,膜基结合力提高。当阴极电流密度为160 mA/cm^(2)时,膜基结合力高于60 N。综合可知,磷化电流密度的增加有利于电化学磷化膜的致密化,有利于膜基结合力和耐磨性的提高。

关键词：电化学磷化膜电流密度 A286 合金组织结构膜基结合力

The Uncommon Uses of the Article

在线全文

学校读者我要写书评

暂无评论

杭州师院学报(社会科学版) 1984年第4期 89-94页

作者： Xue zh.mao

The 'Article' originates from Latin 'Articulus'.Things are rathercomplicated with its use in ***,since there is not sucha part of speech in Chinese,the learners of English in our country willfind it difficult to have a mastery of the uses of the *** meaningof the following sentences is different with the different uses of thearticle.A careful study of them and finding out the difference in meaningbetween them will show us what an important role the articl plays in

关键词： The Uncommon Uses of the Article

Room-temperature deposition of yttria-stabilized zirconia buffer layer on metallic substrates by laser ablation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第16期42卷 1345-1350页

作者： Xiong, XM zh.u, YL Chen, zh.Lu, HB zh., AJ Cui, DF Wang, HS Yang, GZ Chinese Acad Sci Inst Phys Lab Opt Phys Beijing 100080 Peoples R China Chinese Acad Sci Ctr Condensed Matter Phys Beijing 100080 Peoples R China

THE preparation of high-temperature superconducting (HTSC) wires or tapes is very important for the power application of HTSC. High-J_c properties of Y-Ba-Cu-O thin film at liq uid-nitrogen temperature are very attractive not only for small-sized electronic devices, but also for large-scale applications such as high-power transmission cables, high-field magnets and large-scale microwave components. Large-current power application would be achieved if high-J_c YBCO films were grown on practical cheap and flexible metallic substrates. An yttria-stabi-

关键词： YSZ low temperature PLD buffer layer metal substrate.

Relaxation of non-isothermal hot dense plasma parameters

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2018年第1期3卷 40-49页

作者： S.K.Kodanova M.K.issanova S.M.Amirov T.S.Ramazanov A.Tikhonov zh.A.Moldabekov institute for Experimental and Theoretical Physics Al-Farabi Kazakh National University71 Al-Farabi Str.050040 AlmatyKazakhstan institute of Applied Sciences and iT 40-48 Shashkin Str.050038 AlmatyKazakhstan Nazarbayev University Kabanbay Batyr Ave.53Astana 010000Kazakhstan

The relaxation of temperature,coupling parameters,the excess part of equation of state,and the correlation energy of the non-isothermal hot dense plasmas are considered on the basis of the method of effective interaction *** electroneion effective interaction potential for the hot dense plasma is *** accuracy of description of the dense plasma properties by the effective electroneion interaction potential is demonstrated by the agreement of the derived quantities like stopping power and transport coefficients calculated using our methodology with the results of the finite-temperature Kohn-Sham density-functional theory molecular dynamics,and orbital-free molecular dynamics results as well as with the data obtained using other theoretical approaches.

关键词： Dense plasma Effective potentials Temperature relaxation Stopping power Transport

A New Method for Locating Calculation of Arbitrary Spatial Straight Line or Plane in NC Machining

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

厦门大学学报（自然科学版） 2002年第S1期41卷 149-150页

作者： YAN Shu-tian, LiU Tao, WU Zai-xin, HU Chi-bing, HU Li-zh.i (College of Mechano-Electronic Engineering, Gansu University of Techn ology, Lanzh.u 730050, China)

in the manufacturing process, we often encounter so me location machining of space arbitrary straight lines and planes that are not on ly unparalleled but also not vertical with the machine tool spindle or the cutti ng tool. in the past, we can do the location machining through the methods of dr awing line and making level in the ordinary machine tool. in the numerical contr ol machining of the CNC machine tool and manufacturing center, however, the spac e location and angle of the arbitrary straight lines and planes must be precisel y calculated in advance. So that precisely locating can be guaranteed in machini ng. Therefore, how to work out the space location angle of the arbitrary straigh t lines and planes to be machined both conveniently and precisely, turns out to be the must-be-solved chief problem in the numerical control machining. in thi s paper, through the deeply research of this problem, a new kind of calculating formula that calculates and defines the space location angle of the arbitrary st raight lines and planes by using the methods of analytic calculating. The formul a has been applied in the practical manufacturing calculation. it is proved that the new space angle calculating methods of arbitrary straight lines and planes is convenient in calculating and precise in locating. And it provides us a n ew, brief and precise calculating method in the numerical control machining of t he numerical control machine tool and manufacturing center.

关键词： arbitrary straight line arbitrary plane pr ojected angle inclination location