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Tensile and Fracture Properties of 15 vol% SiC_p/2009Al Composites Fabricated by Hot Isostatic Pressing and Hot Extrusion Processes

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Acta Metallurgica Sinica(English Letters) 2014年第5期27卷 875-884页

作者： Junhui Nie jianzhong fan Shaoming Zhang Shaohua Wei Tao Zuo Zili Ma Zhaobing Xiang General Research Institute for Nonferrous Metals

15 vol% silicon carbide particle （SiCp）-reinforced 2009A1 matrix （15 vol% SiCp/2009A1） composites were fabricated by hot isostatic pressing （HIP） and hot extrusion processes. The tensile and fracture properties of 15 vol% SiCp/ 2009Al were studied. The results showed that hot extrusion increased the ultimate tensile strength （UTS）, yield strength （YS）, elongation （EL）, reduction in area （RA）, and fracture toughness of the composites. The heat treatment resulted in the increase in UTS, YS, and fracture toughness, but a decrease in EL and RA. Both hot extrusion and heat treatment had negligible effects on elastic modulus （E）. With the increase of SiCp size, the UTS, YS, and E decreased, but the EL and RA increased. The fracture toughness increased first and then decreased with increasing SiCp size, and when the SiCp size was about 7 μm, the composites obtained the maximum fracture toughness value of 31.74 MPa m^1/2.

关键词： Aluminum matrix composites Silicon carbide Tensile properties Facture toughness Particle size

Karyotype establishment and development of specific molecular markers of Aegilops geniculata Roth based on SLAF-seq

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Journal of Integrative Agriculture 2024年第12期23卷 3953-3965页

作者： Yongfu Wang jianzhong fan Hong Zhang Pingchuan Deng Tingdong Li ChunhuanChen Wanquan Ji Yajuan Wang College of Agronomy Northwest A&F UniversityYangling 712100China State Key Laboratory of Crop Stress Biology for Arid Areas Yangling 712100China Shaanxi Research Station of Crop Gene Resources and Germplasm Enhancement Ministry of Agriculture and Rural AffairsYangling 712100China

The constant evolution of pathogens poses a threat to wheat resistance against diseases,endangering food *** resistant wheat varieties is the most practical approach for circumventing this *** a close relative of wheat,Aegilops geniculata,particularly accession SY159,has evolved numerous beneficial traits that could be applied to improve *** this study,we established the karyotype of SY159 by fluorescence in situ hybridization(FISH)using the oligonucleotide probes Oligo-pTa535 and Oligo-pSc119.2 and a complete set of wheat–*** accession TA2899 addition lines as a *** specific-locus amplified fragment sequencing(SLAF-seq)technology,400 specific markers were established for detecting the SY159 chromosomes with efficiencies reaching 81.5%.The SY159-specific markers were used to classify the different homologous groups of SY159 against the *** addition *** used these specific markers on the 7Mg chromosome after classification,and successfully confirmed their suitability for studying the different chromosomes of *** study provides a foundation for accelerating the application of SY159 in genetic breeding programs designed to improve wheat.

关键词： Aegilops geniculata Roth chromosome karyotype analysis FISH SLAF-seq specific molecular marker

Single-Component Color-Tunable Smart Organic Emitters with Simultaneous Multistage Stimuli-Responsiveness and Multimode Emissions

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Research 2024年第2期2023卷 719-728页

作者： Yu Yan Chengfang Liu jianzhong fan Yusheng Li Huanling Liu Qian Wang Xiangchun Lil Junfeng Li Wen-Yong Lai State Key Laboratory of Organic Electronics and Information Displays(SKLOEID) Institute of Advanced Materials(IAM)School of Chemistry and Life SciencesNanjing University of Posts&Telecommunications9 Wenyuan RoadNanjng 210023China Shandong Province Key Laboratory of Medical Physics and Image Processing Technology School of Physics and ElectronicsShandong Normal UniversityJinan 250358China

Achieving color-tunable emission in single-component organic emitters with multistage stimuli-responsiveness is of vital significance for intelligent optoelectronic applications,but remains enormously ***,we present an unprecedented example of a color-tunable single-component smart organic emitter(DDOP)that simultaneously exhibits multistage stimuli-responsiveness and multimode *** based on a highly twisted amide-bridged donor-tcceptor-donor structure has been found to facilitate intersystem crossing,form multimode emissions,and generate multiple emissive species with multistage *** pristine crystalline powders exhibit abnormal excitation-dependent emissions from a monomer-dominated blue emission centered at 470 nm to a dimer-dominated yellow emission centered at 550 nm through decreasing the ultraviolet(UV)excitation wavelengths,whereas DDOP single crystals show a wide emission band with a main emission peak at 585 nm when excited at different *** emission behaviors of pristine crystalline powders and single crystals are different,demonstrating emission features that are closely related to the aggregation *** work has developed color-tunable single-component organic emitters with simultaneous multistage stimuli-responsiveness and multimode emissions,which is vital for expanding intelligent optoelectronic applications,including multilevel information encryption,multicolor emissive patterns,and visual monitoring of UV wavelengths.

关键词： donor excitation Smart

Perspective for aggregation-induced delayed fluorescence mechanism:A QM/MM study

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Chinese Physics B 2020年第8期29卷 531-537页

作者： Jie Liu jianzhong fan Kai Zhang Yuchen Zhang Chuan-Kui Wang Lili Lin Key Laboratory of Medical Physics and Image Processing&Shandong Provincial Engineering and Technical Center of Light Manipulations School of Physics and ElectronicsShandong Normal UniversityJinan 250358China

To enhance the potential application of thermally activated delayed fluorescence(TADF)molecular materials,new functions are gradually cooperated to the TADF *** induced emission can effectively solve the fluorescence quenching problem for TADF molecules in solid phase,thus aggregation-induced delayed fluorescence(AIDF)molecules were recently ***,their luminescent mechanisms are not clear *** this work,excited state properties of an AIDF molecule DMF-BP-DMAC[reported in Chemistry-An Asian Journal 14828(2019)]are theoretically studied in tetrahydrofuran(THF)and solid *** consideration of surrounding environment,the polarizable continuum method(PCM)and the combined quantum mechanics and molecular mechanics(QM/MM)method were applied for solvent and solid phase,*** to the increase of the transition dipole moment and decrease of the energy difference between the first single excited state(S1)and the ground state(S0),the radiative rate is increased by about 2 orders of magnitude in solid *** energy dissipation of the non-radiative process from S1 to S0 is mainly contributed by low-frequency vibrational modes in solvent,and they can be effectively suppressed in aggregation,which may lead to a slow non-radiation process in solid *** factors would induce enhanced luminescence efficiency of DMF-BP-DMAC in solid ***,the small energy gap between S1 and triplet excited states results in high reverse intersystem crossing(RISC)rates in both solvent and solid ***,TADF is confirmed in both *** significantly influences both the ISC and RISC processes and more RISC channels are involved in solid *** enhanced delayed fluorescence should be induced by both the enhanced fluorescent efficiency and ISC *** calculation provides a reasonable explanation for experimental measurements and helps one to better understand the luminescence mechanism of AIDF molecules.

关键词： thermally activated delayed fluorescence aggregation-induced delayed fluorescence the combined quantum mechanics and molecular mechanics method

Luminescent Cu(Ⅰ) and Ag(Ⅰ) coordination polymers:Fast phosphorescence or thermally activated delayed fluorescence

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Chinese Chemical Letters 2019年第11期30卷 1931-1934页

作者： Gangyuan Li Hao Ye Fucheng Zhu Yan Geng jianzhong fan Jianping Ma Chihaya Adachi Yu-Bin Dong College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongKey Laboratory of Molecular and Nano ProbesMinistry of EducationShandong Normal UniversityJi'nan 250014China Center for Organic Photonics and Electronics Research(OPERA) Kyushu UniversityFukuoka 819-0395Japan School of Physics and Electronics Shandong Normal UniversityJi'nan 250014China Japan Science and Technology Agency ERATO Adachi Molecular Exciton Engineering ProjectInternational Institute for Carbon Neutral Energy Research(WPI-IbCNER)Kyushu UniversityFukuoka 819-0395Japan

By applying two donor-acceptor motif molecules,5,10-di(pyridin-4-yl)-5,10-dihydrophenazine(L1)and 10,10'-di(pyridin-3-yl)-10H,10'H-9,9'-spiroacridine(L2),as ligands and CuI/AgCF3CO2 as metal salt,we synthesized three coordination polymers,namely,{Cu4(L1)2I4}(CP1),{Cu(L2)I·CHCl3}(CP2)and{Ag(L2)CO2CF3·CHCl3}(CP3).X-ray crystallographic analysis revealed that three coordination polymers all feature one-dimensional(1D)linear chains which are consisting of molecular boxlike *** comparison with low photoluminescence quantum yield(PLQY)of two ligands,three coordination polymers,CP1,CP2 and CP3,present more intense photoluminescence with PLQY of 15%,46%and 34%at room temperature *** PL emission of CP1 and CP2 at room temperature could be attributed to the fast phosphorescence with lifetime both around 5 ms due to effective intersystem crossing(ISC).Whilst,it is worth noting that CP3 exhibit thermally activated delayed fluorescence(TADF)emission at room temperature.

关键词： Coordination polymers Phosphorescence Thermally activated delayed fluorescence Photoluminescence quantum yield Intersystem crossing

Structural evolution of non dendritic AlSi7Mg alloy during reheating

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中国有色金属学会会刊：英文版 1999年第3期9卷 553-556页

作者： Zhang Kui(张奎) Zhang Yongzhong(张永忠) Liu Guojun(刘国均) Xu Jun(徐骏) Zhang Jingxin(张景新) fan jianzhong(樊建中) Shi Likai(石力开) Gen Res Inst NonFerrous Met Beijing 100088 Peoples R China

The structural evolution of non dendritic AlSi7Mg alloy during reheating in resistance furnace was studied. The alloy ingots were produced by electromagnetic stirring during solidification. It was found that, the Si phase in eutectic dissolves in a way of diffusion toward α phase, its appearance changes from flake to dot like, and tends to be fine and spheroidal with increasing reheating temperature. The thinner the flake, the lower the temperature for the occurrence of this process, and the higher the transforming speed. The eutectic melts partially when Si phase dissolves to some extent, and the morphology and size of primary α phase begin to change. The dendrite and rosette α phases tends to sphericize. The size of the former becomes larger, while the size of the latter reduces to be 1/2～1/4 of the original size. The spheroidal primary α phase has a tendency of grain growth.

关键词： aluminum alloys reheating non dentritic structure transformationDocument code: A

Effect of Tongxinluo on basic fibroblast growth factor mRNA after cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2006年第6期1卷 509-512页

作者： Ruixue Yin Bingxun Lu Lixin Wang jianzhong fan Changjun Lu Hongzhen Zhou Department of Neurology Nanfang Hospital of Southem Medical University Guangzhou 510515 Guangdong Province China

BACKGROUND ： Basic fibroblast growth factor （bFGF） can cause proliferation and differentiation of plentiful cells which are derived from mesoblast and neural ectoblast. Previous researches suggested that Tongxinluo could promote differentiation from neural stem cells （NSCs） to neurons and astrocytes after cerebral ischemia/reperfusion injury.OBJECTIVE： To observe the effect of Tongxinluo on bFGF mRNA of rats after cerebral ischemia/reperfusion injury and analyze its dosage-dependence. DESIGN ： Randomized controlled study SETTING ： Department of Neurology, Nanfang Hospital of Southem Medical University MATERIALS： The experiment was carried out in Neurological Department of Nanfang Hospital affiliated to Southern Medical University from May 2005 to March 2006. A total of 192 healthy Wistar rats, weighing （200±20） g, of SPF grade, of both gender by half, were provided by Experimental Animal Center of Nanfang Hospital Affiliated to Southern Medical University. Tongxinluo was consisted of renshen, wugong, quanxie, shuizhi, chishao, bingpian, etc. and was provided by Shijiazhuang Yiling Pharmaceutical Co., Ltd. （batch number： 9906115）. Main reagents： Agarose, DEPC-treated water, total RNA purification kit and one-step reverse transcription polymerase chain reaction （RT-PCR） kit were provided by Beijing Saibaisheng Gene Technique Co., Ltd. METHODS ： All rats were randomly divided into 4 groups, including high-dosage Tongxinluo group, low-dosage Tongxinluo group, model group and sham operation group with 48 in each group. Rats in the former three groups were observed at 3, 5, 7, 14, 21 and 30 days after ischemia/reperfusion. In addition, rats in sham operation group were selected at the relevant time points. Every 8 rats were selected from each group for once. （1） Right middle cerebral artery occlusion-reperfusion models were induced by Koizumi method and modified; moreover, neurological impairment was evaluated with Zealonga method. Except rats in sham operation

关键词： cerebral ischemia time point polymerase chain reaction fibroblast growth factor middle cerebral artery reverse transcription analysis of variance Experimental Animal neural stem cells distilled water Wistar rats basic value

Synthesis and characterization of nanocrystalline Ni produced by cryomilling in liquid nitrogen

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Rare Metals 2007年第2期26卷 147-151页

作者： YANG Bin fan jianzhong HAO Bin TIAN Xiaofeng CHENG Junsheng ZHANG Jishan State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China International Centre for Materials Physics Chinese Academy of Sciences Shenyang 110016 China National Engineering and Technology Research Center for Nonferrous Metals Composites General Research Institute for Nonferrous Metals Beijing 100088 China

NanocrystaUine Ni powders were successfully fabricated by mechanically milling at cryogenic temperature （cryomilling） with 1 wt.%Y2O3 particles. The experimental results have shown that the Ni grain size is reduced to 25 nm after 2 h of cryomilling in the presence of the Y2O3 particles. The cryomiUed Ni/Y2O3 powders can maintain their nanocrystalline structure up to 900℃, or 62% of the melting point of Ni. A bulk nanocrystalline Ni/Y2O3 material with a thermally stable grain size of approximately 100 nm was produced by cryomilling, cold isostatic pressing, followed by hot isostatic pressing. The microhardness of bulk nanocrystalline Ni/1wt.%Y2O3 is 315 DPH, which is two times as high as that of conventional Ni.

关键词： nanocrystalline mechanical milling nickel characterization

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俄罗斯的稳定发展态势与中俄关系走向

世界经济与政治论坛 2008年第5期 51-58页

作者：范建中江苏省委党校国际问题研究中心

当前,俄罗斯正面临由"稳定增长"到"稳定发展"的重大转折,将进入经济社会发展的新时期。俄罗斯稳定发展的有利因素是:国内对稳定发展的认识统一,社会政治秩序稳定,支持经济稳定发展的物质基础较为雄厚,"普京计划"得到贯彻执行的可靠性程... 详细信息

当前,俄罗斯正面临由"稳定增长"到"稳定发展"的重大转折,将进入经济社会发展的新时期。俄罗斯稳定发展的有利因素是:国内对稳定发展的认识统一,社会政治秩序稳定,支持经济稳定发展的物质基础较为雄厚,"普京计划"得到贯彻执行的可靠性程度比较高。而"梅-普组合"出现后新的决策中心的形成和领导层的职权划分、市场经济和"主权民主"制度的完善、经济多样化和创新经济的实现以及良好的外部环境的营造,则是俄罗斯稳定发展面临的挑战性问题。俄罗斯稳定发展对中俄关系影响的主导面将是积极的。中俄两国的稳定发展将对双边关系提出新的要求,为双边关系的发展注入新的动力,推动中俄关系步入共同发展的新阶段。

关键词：俄罗斯稳定发展态势中俄关系