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rice Science 2004年第Z1期 231-237页

作者： LUO Yan-chang, WANG Shou-hai, LI Cheng-quan, Wu Shuang, WANG De-zheng, Du Shi-yun (rice research institute, anhui academy of agricultural sciences, hefei 230031, china)

4183 is a promising wide compatibility restorer line with good grain quality. Its hybrid rice Shuangyou 4183 (Shuangjiu A/ 4183) was registered in Annul Province in 2003. However, the line and its hybrid rice are susceptible to bacterial blight caused by Xanthomonas oryzae pv. oryzae (Xoo). R4183 carrying Xa21 was developed to improve bacterial blight resistance of 4183 through introducing the broad-spectrum resistance gene Xa21 by marker-aided selection. R4183 had similar level of bacterial blight resistance to IRBB21, the resistant donor, while maintained the wide compatibility, restoring ability and other good economic traits of the recurrent parent 4183. Critical issues on improvement of bacterial blight resistance of hybrid rice and breeding strategies were also discussed.

关键词： hybrid rice bacterial blight marker-assisted selection, wide compatibility restorer line

SCAR Markers Assisted Selection for a Bentazon Susceptible Lethality Gene (ben) in rice

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rice Science 2003年第Z1期 6-10页

作者： XIANG Tai-he~(1,2), YANG Jian-bo~2, YANG Qian-jin~3, ZHU Qi-sheng~3 , LI Li~2, HUANG Da-nian~4 (~1School of Life sciences, Hangzhou Normal College, Hangzhou 310036, china ~2Key Laboratory of rice Genetics Breeding, Ministry of Agriculture, P. R. china rice research institute, anhui academy of agricultural sciences, hefei 230031 , china ~3Natural Nourishing Food Engineering institute, anhui academy of agricultural sciences, hefei 230031 , china ~ ~ china National rice research institute, Hangzhou 310006, china)

In progenies resulting from crosses involving rice cultivar Norin 8m susceptible to bentazon as the donor of ben gene, SCARs tightly linked to ben were utilized for selection of ben. The homozygous and heterozygous genotypes with ben could be identified with the SCARs. The molecular markers offer a powerful tool for indirect selection of ben and can accelerate the introgression of ben into current rice cultivars.

关键词： rice bentazon susceptible lethality gene molecular marker assisted selection breeding

Simultaneous improvement and genetic dissection of grain yield and its related traits in a backbone parent of hybrid rice(Oryza sativa L.) using selective introgression

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Simultaneous improvement and genetic dissection of grain yie...

Effects of Nitrogen Doping on Microstructures and Irradiation Resistance of Ti-Zr-Nb-V-Mo Refractory High-Entropy Alloy

第十三届全国植物基因组学大会

作者： Hongjun Zhang~(1#),Hui Wang~(1#),Yiliang Qian~(1,4),Jiafa Xia~2,Zefu Li~2,Yingyao Shi~(1,4),Linghua Zhu~1,Jauhar Ali~3,Yongming Gao~(1*),Zhikang Li~(1,3*) 1 institute of Crop sciences/national Key Facility For Crop Gene Resources and Genetic Improvement,Chinese academy of agricultural sciences,Beijing 100081,china 2 rice research institute,anhui academy of agricultural sciences,hefei 230031,china 3 Plant Breeding,Genetics,and Biotechnology Division,International rice research institute, Metro Manila 7777,Philippines 4 College of Agriculture,anhui agricultural University,hefei 230036,china

Three populations that consist of 125 BCF introgression lines(ILs) were developed through selection of single high-yielding plants for the simultaneous improvement and genetic dissection of rice yield and its related *** progeny testing allowed the identification of 21 promising ILs that had significantly higher yields than the recurrent parent Shuhui527(SH527) across 2 environments(Es).A

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1007-1018页

作者： Huanzhi Zhang Tianxin Li Qianqian Wang Zhenbo Zhu hefei Huang Yiping Lu Engineering research Center of High Entropy Alloy Materials(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shanghai institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai201800China

Interstitial strengthening with nitrogen(N)is one of the effective ways to improve the mechanical properties of HEAs,but the effects of N on the microstructures and mechanical properties of the irradiated HEAs have not been studied ***,the microstructures and mechanical properties of N-free and N-doped Ti_(2)ZrNbV_(0.5)Mo_(0.2)HEAs before and after He irradiation were *** results showed that the solid solution strengthening caused by interstitial N improved the yield strength at room temperature and 1023 K without significantly reducing plasticity.N doping significantly promoted the growth,aggregation and wider spatial distribution of He bubbles by enhancing the mobility of He atoms/He-vacancy complexes,with the average size of He bubbles increasing from 10.4 nm in N-free HEA to 31.0 nm in N-doped *** addition,N-doped HEA showed a much higher irradiation hardness increment and hardening fraction than N-free *** to conventional materials doped with N,the introduction of N into Ti_(2)ZrNbV_(0.5)Mo_(0.2)HEA had adverse effects on its resistance to He bubble growth and irradiation *** results of this study indicated that N doping may not improve the irradiation resistance of HEAs.

关键词： High-entropy alloys Nitrogen doping Mechanical properties Helium bubbles Irradiation resistance

Fabrication of Ni-decorated helical ribbon composite microstructure from self-assembled lipid tubule by electroless metallization

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Science china Chemistry 2006年第3期49卷 238-245页

作者： FU Yubin1,2, ZHANG Lide1 & ZHENG Jiyong2 1. institute of Solid State Physics, china academy of sciences, hefei 230031, china 2. Luoyang Ship Material research institute, Luoyang 471039, china 1. institute of Solid State Physics China Academy of Sciences Hefei 230031 China 2. Luoyang Ship Material research institute Luoyang 471039 China

Lipid molecules can self-assemble into a tubular structure, which is formed by tightly wound helical ribbons. Lipid tubules are utilized as a precursor to fabricate a novel Ni-decorated helical ribbon composite microstructure in a high yield by electroless deposition. The microstructure carries Ni nanoparticles on the flat face and wires at the edge of helical ribbon, in which the average size of nanoparticles is about 40―60 nm, and the wires are of a layered structure strongly correlated with a multi-bilayer structure in the lipid membrane. Compared with the tubular precursor, the Ni-decorated composite microstructure becomes short and irregular shapes due to the breakage in the deposition, and its formation is largely bound up with the tubular helical structure and the different catalytic process. Finally, the helical composite microstructure would have a potential application in the development of electric active materials.

关键词： molecular self-assembly, lipid tubule, helical ribbon, electroless deposition, nanoparticles and wires, composite microstructure.

Controversy about the Origin of the Grain Boundary Internal Friction Peak and Its Clarification

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Journal of Materials Science & Technology 1998年第6期14卷 481-490页

作者： T.S.Ke (Tingsui GE)(Lab. of Internal Friction and Defects in Solids, institute of Solid State Physics, Chinese academy of sciences,hefei 230031, china) Lab. of Internal Friction and Defects in Solids Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China

In the seventies some scientific workers from France and Italy suggested that the grain boundary internal friction peak (named the K (e) over cap peak in the literature) widely accepted as a grain boundary process, is originated from the motion of lattice dislocations. Since this problem is one of fundamental importance, this controversy has drawn much international attention. Started from 1982, the hefei research group made a critical analysis of the large amount of literature concerning this problem and,performed a series of crucial experiments to clarify the controversy. It is concluded that the irrelevant evidence suggested by the controverters comes from the farfetched interpretation and the mis-identification of the internal friction peaks appeared under various experimental conditions and different states of the specimens.

关键词： Figure Controversy about the Origin of the Grain Boundary Internal Friction Peak and Its Clarification

Relationship between Environmental Pollution of Coal Mine and Spectral Characteristics of Nearby Plants

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Journal of University of Science and Technology Beijing 2001年第1期8卷 10-14页

作者： Liqing Lei institute of Geographic sciences and Natural Resources research, Chinese academy of sciences, Beijing 100101, china Chinese Acad Sci Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China

Remote sensing technology, as the most advanced method for collecting data, along with the common ways often used in the past on research of environmental science, was integrated to study the relationship between environmental pollution of coal mine and spectral characteristics of nearby plants. With compositive index and mean reflectivity at near infrared, a regression equation was established, and a conclusion was made that spectral reflectivity can be used to distinguish regions with different pollution degree. Through testing with real status of the research region, it is verified that this kind of integration and conclusion not only are helpful for human being in controlling the movement law of pollutants and the corresponding change of coal mine environmental quality but also bring a new way for the research of environment problems of coal mine.

关键词： remote sensing spectral characteristics reflectivity pollution index compositive index atmospheric pollution

Ab-initio molecular dynamics simulation on nano-system under external pressure

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Science china Mathematics 2004年第z1期47卷 92-100页

作者： Jl Min, SUN Deyan & GONG XingaoSurface Physics Laboratory and Department of Physics, Fudan University, Shanghai 200433, china institute of Solid State Physics, Chinese academy of sciences, hefei 230031, china Interdisciplary Center for Theoretical studies, Chinese academy of sciences, Beijing 100080, china Fudan Univ Surface Phys Lab Shanghai 200433 Peoples R China Fudan Univ Dept Phys Shanghai 200433 Peoples R China Chinese Acad Sci Inst Solid State Phys Hefei 230031 Peoples R China Chinese Acad Sci Interdisciplinary Ctr Theoret Studies Beijing 100080 Peoples R China

A new constant-pressure molecular dynamics (MD) method is developed to simulate the dynamic behavior and structure transition of finite system under external pressure. In this method, no artificial parameter is introduced and the computation overheads are very small. As an application, a hard-soft transition of single wall carbon nanotube (SWCNT) under external pressure is found, which is in agreement with the experiments.

关键词： phase transition, simulation, nano-particles

Formation Mechanism of NiAl/TiB_2 Nanocomposite by Mechanical Alloying Elemental Powders

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Journal of Materials Science & Technology 1998年第6期14卷 491-496页

作者： Lanzhang ZHOU and Jianting GUO(institute of Metal research, Chinese academy of sciences, Shenyang 110015, china) institute of Metal research Chinese Academy of Sciences Shenyang 110015 China

A NiAl/TiB2 nanocomposite is synthesized by mechanical alloying elemental powders. Upon milling for a certain time, an abrupt exothermic reaction occurs and a large amount of NiAl and TiB2 compounds form simultaneously. It is suggested that two separate chemical reactions,i.e. Ni+Al →NiAl and Ti+2B→TiB2, are involved during the exothermic reaction. Additionof Ti and B to Ni-Al system impedes the structural evolution of Ni and Al powders and delays the abrupt reaction. The final products are equilibrium phases without any metastable phases formed. This type of reaction is suggested to be suitable for alloy systems with two large heatrelease reactions.

关键词： NiAl TiB Formation Mechanism of NiAl/TiB2 Nanocomposite by Mechanical Alloying Elemental Powders

Effect of 5'-deletion of Arabi-dopsis profilin2 promoter on its vascular specific expression

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Chinese Science Bulletin 2001年第19期46卷 1627-1630页

作者： LIU Yuhui, WANG Zhixing & JIA ShirongBiotechnology research institute, Chinese academy of agricultural sciences, Beijing 100081, china Biotechnology research institute Chinese Academy of Agricultural Sciences Beijing China

Based on the published sequence of profilin2 promoter of Arabidopsis thaliana, a full-length promoter (1667 bp) was amplified by PCR. The 5’ -end deletion fragments with length of 1380, 1153, 969 and 597 bp were then fused with gus (uid\) gene respectively. Constructed plant expression vectors were individually transferred into Kalan-choe laciniata and transgenic plants regenerated. GUS his-tochemical assay confirmed that the full-length promoter Pfnl.7 was vascular-specific. Deletion assays showed that profilin2 promoter could be divided into three parts. Deletion of fragment 1 ( -1667 -1380 bp) resulted in constitutive expression, suggesting that element(s) responsible for vascular-specific expression might exist in this region. Fragment 2 located at -1153 - -597 bp strongly inhibited gus gene expression. Fragment 3 ( -597 - -1 bp) is considered as a basic domain of profilin2.

关键词： profilin2 promoter Kalanchoe constitutive expression vascular-specific expression.