检索结果-南通市图书馆

Introgression the Salinity Tolerance QTLs <i>Saltol</i>into AS996, the Elite Rice Variety of Vietnam

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

American Journal of Plant Sciences 2012年第7期3卷 981-987页

作者： Luu T. N. Huyen Luu m. Cuc Abdelbagi m. Ismail Le H. ham Agricultural Genetics Institute Vietnam Academy of Agricultural Sciences International Rice Research Institute - DAPO Box 7777 Metro Manila Philippine.

This study focus on developing new salinity tolerance and high yielding rice lines, using markers assisted backrossing (mABC). Total of 500 SSR markers on 12 rice chromosomes were screened for parental polymorphic markers. Of which, 52 primers in the Saltol region were checked with the two parents varieties to identify polymorphic primers for screening the Saltol region of the breeding populations. For each backcross generation of ASS996/FL478, approx. 500 plants were screened with 63 polymorphic markers distributed on 12 chromosomes. The two BC1F1 plants P284 and P307 which had the highest recipient alleles up to 89.06% and 86.36%, were chosen for the next backcrossing. Three BC2F1 plants with the recipient alleles up to 94.03% and 93.18% were used to develop BC3F1 generation. The best BC3F1 plant was P284-112-209 with all the recipient alleles and Saltol region. The four plants P307-305-21, P284-112-195, P284-112-198, P284-112-213 were the second ranking with only one loci heterozygous (applied 63 markers covered on 12 chromosomes). These five plants were chosen as the breeding lines for result of Saltol-AS996 introgression. The breeding line BC4F1 having 100% genetic background of donor variety is ready for develop new salinity tolerant variety ASS996-Saltol to cope with climate change.

关键词： marker Assisted Backcrossing Rice Variety AS996 Salinity Tolerance-Saltol QTLs

1.3μm GaAs基量子点垂直腔面发射激光器结构设计与分析

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

物理学报 2005年第8期54卷 3651-3656页

作者：佟存柱牛智川韩勤吴荣汉中国科学院半导体研究所北京100083

结合垂直腔面发射激光器(VCSEL)原理以及量子点增益特点,计算了不同结构VCSEL的腔内损耗和量子点的模式增益.分析了激光器阈值特性以及氧化限制层对光损耗的影响.设计了含氧化限制层的1·3μm量子点VCSEL结构.

关键词：垂直腔面发射激光器量子点结构设计 GaAs VCSEL 阈值特性模式增益腔内损耗光损耗限制氧化

Flow of Eyring-Powell liquid due to oscillatory stretchable curved sheet with modified Fourier and Fick’s model

在线全文

学校读者我要写书评

暂无评论

Applied mathematics and mechanics(English Edition) 2021年第10期42卷 1461-1478页

作者： m.ImRAN Z.ABBAS m.NAVEED Department of mathematics The Islamia University of BahawalpurBahawalpur 63100Pakistan Department of mathematics Khwaja Fareed University of Engineering&Information TechnologyRahim Yar Khan 64200Pakistan

This study deals with the features of the mass and heat transport mechanism by adopting a modified version of Fourier and Fick’s model known as the CattaneoChristov double diffusive *** time-dependent magnetohydrodynamic(mHD)flow of the Eyring-Powell liquid across an oscillatory stretchable curved sheet in the presence of Fourier and Fick’s model is *** acquired set of flow equations is transformed into the form of nonlinear partial differential equations(PDEs)by applying appropriate similarity variables.A convergent series solution to the developed nonlinear equations is accomplished with the help of an analytical approach,i.e.,the homotopy analysis method(ham).The consequences of diverse parameters,including the dimensionless EyringPowell liquid parameter,the radius of curvature,the Schmidt/Prandtl numbers,the ratio of the oscillatory frequency of the sheet to its stretchable rate constant,the mass and thermal relaxation variables involved in the flow,and the heat and mass properties,are displayed through graphs and *** is noted from this study that the amplitude of the pressure distribution rises for the high parametric values of the Eyring-Powell parameter.

关键词： oscillatory stretchable curved surface magnetohydrodynamic(mHD) Eyring-Powell liquid Cattaneo-Christov double diffusion analytical technique

Application of marker Assisted Backcrossing to Introgress the Submergence Tolerance QTL <i>SUB</i>1 into the Vietnam Elite Rice Variety-AS996

在线全文

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2012年第4期3卷 528-536页

作者： Luu m. Cuc Luu T. N. Huyen Pham T. m. Hien Vu T. T. Hang Nguyen Q. Dam Pham T. mui Vu D. Quang Abdelbagi m. Ismail Le H. ham Agricultural Genetics Institute Tu Liem Vietnam Cuu Long River Delta Rice Research Institute Tan Thanh Vietnam International Rice Research Institute Metro Manila Philippine

The result of the study contributes to enhancing and sustaining future livelihoods and food security in Vietnam vis-a-vis climate change. An innovative strategy based on marker-assisted backcrossing (mABC) was used to transform popular rice variety AS996 into the one can tolerate submergence while maintaining its original characteristics preferred by farmers and consumers. The submergence tolerance QTL SUB1 counts for up to 70% of the submergence tolerant and provides a marked improvement of submergence tolerance in all genetic backgrounds and environments tested so far. Parental diversity was carried out with 460 markers. Of which, 53 polymorphic markers were used for assessment on BC1F1, BC2F1 and BC3F1 generations. The best BC1F1 plant was P422 with highest recipient allele was 87.5%, while the additional chosen plants were P412, P428, P215 and P39 (81% - 84%). All these plants were used to develop BC2F1 generation. The six BC2F1 plants were used to develop BC3F1 and BC2F2 were the plants number P422-11 and P422-14 having 93.75% recipient alleles and P422-12, P422-3, P39-17, P39-25 having 92.25% recipient alleles. Total of 445 BC3F1 plants were confirmed the introgresion of SUB1 using ART5 and SC3. After three generations of backcrossing, application of mABC resulted in the best BC3F1 individual P422-14-177 with 100% of recipient alleles based on the number of 53 markers used with only the introgression size of SUB1 was 0.3mb between ART5 and SC3. Phenotyping was carried out on BC3F1 and BC2F2 of the selected lines. The survival ratio of these selected lines and IR64SUB1 were the same. It convinced the successfully introgress SUB1 into AS996 rice variety. The breeding line BC4F1 having 100% genetic background of donor variety is ready for develop new submergence tolerant rice variety ASS996-SUB1 to cope with climate change.

关键词： AS996-SUB1 Climate Change marker-Assisted Backcrossing (mABC) Rice Submergence

magnetohydrodynamic Stagnation Point Flow of a maxwell Nanofluid with Variable Conductivity

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

Communications in Theoretical Physics 2019年第12期71卷 1493-1500页

作者： m.Irfan m.Khan W.A.Khan m.Alghamdi Department of mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan School of mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China Department of mathematics Faculty of ScienceKing Khalid UniversityAbha 61413Kingdom of Saudi Arabia

This article reports the simultaneous properties of variable conductivity and chemical reaction in stagnation point flow of magneto maxwell *** Buongiorno’s theory has been established to picture the inducement of Brownian and thermophrotic diffusions ***,the aspect of heat sink/source is *** homotopic analysis method(ham)has been worked out for the solution of nonlinear *** behavior of inferential variables on the velocity,temperature,concentration and local Nusselt number for maxwell nanofluid are sketched and *** attained outcomes specify that both the temperature and concentration of maxwell fluid display analogous behavior,while the depiction of Brownian motion is quite conflicting on both temperature and concentration *** is further noted that the influence of variable thermal conductivity on temperature field is similar to that of Brownian motion ***,for the confirmation of our study comparison tables are reported.

关键词： maxwell nanofluid stagnation point flow magnetohydrodynamic(mHD) variable conductivity chemical reaction

New homotopy analysis transform method for solving the discontinued problems arising in nanotechnology

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2013年第11期22卷 135-139页

作者： m.m.Khader Sunil Kumar S.Abbasbandy Department of mathematics and Statistics College of Science Al-Imam Mohammed Ibn Saud Islamic University (IMSIU) Department of mathematics Faculty of Science Benha University Department of mathematics National Institute of Technology Department of mathematics Imam Khomeini International University

We present a new reliable analytical study for solving the discontinued problems arising in nanotechnology. Such problems are presented as nonlinear differential-difference equations. The proposed method is based on the Laplace trans- form with the homotopy analysis method （ham）. This method is a powerful tool for solving a large amount of problems. This technique provides a series of functions which may converge to the exact solution of the problem. A good agreement between the obtained solution and some well-known results is obtained.

关键词： discretized mKdV lattice equation nonlinear differential-difference equations Laplace transform,homotopy analysis transform method

measurement of the Cross Sections for the 175Lu(n,2n)174m,gLu Reaction

在线全文

学校读者我要写书评

暂无评论

中国核科技报告 1998年第S2期 22-24页

作者： Yu Weixiang Zhao Wenrong Lu Hanlin ham Xiaogang (Department of Nuclear Physics, CIAE, P. O. Box 275, Beijing 102413)

Introduction TheLu(n,2n)Lu reaction is an important indicator. There are 10 sets of measured data since 1960 (total 58 experimental values). most of the data are finished at 14 meV with 20%～30% discrepancy. So we mea... 详细信息

关键词： Lu measurement of the Cross Sections for the g)Lu Reaction n,2n

Linear and nonlinear torsional free vibration of functionally graded micro/nano-tubes based on modified couple stress theory

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Applied mathematics and mechanics(English Edition) 2016年第6期37卷 725-740页

作者： A.R.SETOODEH m.REZAEI m.R.ZENDEHDEL SHAHRI Faculty of mechanical and Aerospace Engineering Shiraz University of Technology

The linear and nonlinear torsional free vibration analyses of functionmly graded micro/nuno-tubes （FGmTs） are analytically investigated based on the couple stress theory. The employed non-classical continuum theory contains one material length scale parameter, which can capture the small scale effect. The FGmT model accounts for the through-radius power-law variation of a two-constituent material. hamilton＇s principle is used to develop the non-classical nonlinear governing equation. To study the effect of the boundary conditions, two types of end conditions, i.e., fixed-fixed and fixed-free, are considered. The derived boundary value governing equation is of the fourthorder, and is solved by the homotopy analysis method （ham）. This method is based on the Taylor series with an embedded parameter and is capable of providing very good approximations by means of only a few terms, if the initial guess and the auxiliary linear operator are properly selected. The analytical expressions are developed for the linear and nonlinear natural frequencies, which can be conveniently used to investigate the effects of the dimensionless length scale parameter, the material gradient index, and the vibration amplitude on the natural frequencies of FGmTs.

关键词： torsional vibration nonlinear vibration micro/nano-tube functionallygraded material (FGm) couple stress theory size effect

Effects of partial slip on flow of a third grade fluid

在线全文

学校读者我要写书评

暂无评论

Acta mechanica Sinica 2006年第5期22卷 393-396页

作者： S. Asghar m. mudassar Gulzar m. Ayub Department of mathematics COMSATS Institute of Information Technology H-8 Islamabad Pakistan Department of mathematics Quaid-i-Azam University

This paper is an analytical study of the rotating flow of a third grade fluid past a porous plate with partial slip effects. It serves as a flow model for the study of polymers. The analytic solution has been determin... 详细信息

关键词： Partial-slip Non-Newtonian fluid Analytic solution Homotopy analysis method