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A new orchid Paphiopedilum guangdongense and its molecular evidence

Journal of Systematics and Evolution 2010年第5期48卷 350-355页

作者： 1 li-jun chen 1,2.3.hong-jian liu 4you-yu li 1li-qiang li 1(Shenzhen Key Laboratory for Orchid Conservation and Utilization,The National Orchid Conservation Center of China/The Orchid Conservation and Research Center of Shenzhen,Shenzhen 518114,China) 2(The Center for Biotechnology and BioMedicine,Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055,China) 3(College of Forestry,South China Agricultural University,Guangzhou 510642,China) 4(The Nature Reserve of Dawuling of Guangdong Province,Xinyi 525000,Guangdong,China) (Shenzhen Key Laboratory for Orchid Conservation and Utilization The National Orchid Conservation Center of China/The Orchid Conservation and Research Center of Shenzhen Shenzhen 518114 China) (The Center for Biotechnology and BioMedicine Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China) (College of Forestry South China Agricultural University Guangzhou 510642 China) (The Nature Reserve of Dawuling of Guangdong Province Xinyi 525000 Guangdong China)

A new Paphiopedilum entity found in southern Guangdong was studied taxonomically by means of internal transcribed spacer of nuclear ribosomal DNA analysis in addition to morphological and phytogeographical *** entity is similar to Paphiopedilum gratrixianum(Masters)Rolfe morphologically,from which it differs by having narrower leaves not wider than 2 cm and lacking purple spots toward abaxial base,pale green dorsal sepal veined with pale purplish brown and not heavily spotted with purple,and staminode subtruncate and mucronate at *** analysis of internal transcribed spacer sequences of this entity and its allies came to the same conclusion that the entity is a member of Paphiopedilum section Paphiopedilum and closely related to but distinct from *** a result,it is treated here as a new species,Paphiopedilum guangdongense ***&***.

关键词： new species nrITS Orchidaceae Paphiopedilum guangdongense.

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Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2024年

作者： Shuai liu Wen-qiang Xu Ying-Tong Di Man-cheng Tang Ding-Kang chen Ming-Ming Cao Yao-Wen Chang hong-yu Tang Chun-Mao yuan jun-Bo Yang Zhi-li Zuo Han Guo Zi-Fei Xu Ying Zeng yun-Dong Wu Xiao-jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase SpeF and P450 monooxygenase SpeG, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, SpeF/SpeG metabolon can control the stereoselectivity of its 2.3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-mA with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

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CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-jun Bi yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi junsong Cang Guofu Cao jianshe Cao Antoine Chance Xuejun Chang yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che yuzhi Che Bin chen Danping chen Fuqing chen Fusan chen Gang chen Guoming chen Hua-Xing chen Huirun chen Jinhui chen Ji-yuan chen Kai chen Mali chen Mingjun chen Mingshui chen Ning chen Shanhong chen Shanzhen chen Shao-Long chen Shaomin chen Shiqiang chen Tianlu chen Wei chen Xiang chen Xiaoyu chen Xin chen Xun chen Xurong chen Ye chen Ying chen yukai chen Zelin chen Zilin chen Gang chen Boping chen Chunhui chen Hok Chuen cheng Huajie cheng Shan cheng Tongguang cheng yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi ling-yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2.30s.

关键词： initiated exceeding precise

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o2突变引起糯玉米籽粒淀粉积累差异研究

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作物学报 2024年第5期50卷 1207-1222页

作者：韩洁楠张泽刘晓丽李冉上官小川周婷芳潘越郝转芳翁建峰雍洪军周志强徐晶宇李新海李明顺中国农业科学院作物科学研究所北京100081 黑龙江八一农垦大学农学院黑龙江大庆163319

糯玉米是主要鲜食玉米类型,opaque2(o2)基因导入可增加籽粒赖氨酸含量,但同时引起籽粒皱缩、淀粉含量下降等,限制了其育种应用。为发掘优良糯玉米受体,以籽粒饱满圆型o2近等基因系(o2-NIL)糯2/wx1wx1o2o2和皱缩型黄糯2/wx1wx1o2o2为研... 详细信息

糯玉米是主要鲜食玉米类型,opaque2(o2)基因导入可增加籽粒赖氨酸含量,但同时引起籽粒皱缩、淀粉含量下降等,限制了其育种应用。为发掘优良糯玉米受体,以籽粒饱满圆型o2近等基因系(o2-NIL)糯2/wx1wx1o2o2和皱缩型黄糯2/wx1wx1o2o2为研究材料,通过对鲜食期、成熟期的百粒重和籽粒成分测定,发现淀粉和可溶性糖含量不同可能是导致2份糯玉米o2-NILs表型差异的主要原因。利用实时荧光定量PCR技术分析,发现授粉后10~24 d两糯玉米o2-NILs中6个淀粉合成基因动态表达模式不同,其中Sh1、Sh2、SSIIIa和SBEIIb差异较大。分析胚乳转录组数据,发现两糯玉米o2-NILs中24个海藻糖和糖基水解酶编码基因和48个o2胚乳修饰基因变化不同,以上结果表明淀粉合成关键基因前期表达量高,后期与对照无差异,且糖代谢基因表达变化有利于淀粉合成可能是糯2/wx1wx1o2o2淀粉含量和百粒重不受o2突变影响,籽粒性状明显优于黄糯2/wx1wx1o2o2的重要原因,同时多个胚乳修饰基因的差异表达可能与该结果直接相关。本研究结果可为o2突变体在玉米育种中的应用提供重要参考。

关键词：糯玉米糯2/wx1wx1o2o2 黄糯2/wx1wx1o2o2 籽粒饱满度淀粉糖代谢差异基因

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Genetic progress in stem lodging resistance of the dominant wheat cultivars adapted to Yellow-Huai River Valleys Winter Wheat Zone in China since 1964

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Journal of Integrative Agriculture 2020年第2期19卷 438-448页

作者： ZHANG hong-jun li Teng liu hong-wei MAI Chun-yan yu Guang-jun li Hui-li yu li-qiang MENG ling-zhi jian Da-wei YANG li li hong-jie ZHOU Yang National Engineering Laboratory for Crop Molecular Breeding/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Xinxiang Innovation Center for Breeding Technology of Dwarf-Male-Sterile Wheat Xinxiang 453731P.R.China Zhaoxian Experiment Station Shijiazhuang Academy of Agricultural and Forestry SciencesZhaoxian 051530P.R.China Institute of Agricultural Sciences the Fourth Division of the Xinjiang Production and Construction CorpsYining 835000P.R.China

Analysis of genetic progress for lodging-related traits provides important information for further improvement of lodging *** winter wheat cultivars widely grown in the Yellow-Huai River Valleys Winter Wheat Zone(YHWZ)of China during the period of 1964–2015 were evaluated for several lodging-related traits in three cropping *** height,height at center of gravity,length of the basal second internode,and lodging index decreased significantly in this period,and the average annual genetic gains for these traits were–0.50 cm or–0.62%,–0.27 cm or–0.60%,–0.06 cm or–0.63%,and–0.01 or–0.94%,*** from other traits,stem strength showed a significant increasing trend with the breeding period,and the annual genetic gains were 0.03 N or 0.05%.Correlation analysis showed that lodging index was positively correlated with plant height,height at center of gravity,and length of the basal second internode,but negatively correlated with stem ***,significantly positive correlations were observed between plant height,height at center of gravity,and length of the basal first and second *** comparison with the wild types,dwarfing genes had significant effects on all lodging-related traits studied except for length of the basal first internode and stem *** component analysis demonstrated that plant height and stem strength were the most important factors influencing lodging *** analysis based on the first two principle components further indicated the targets of wheat lodging-resistant breeding have changed from reducing plant height to strengthening stem strength over the breeding *** study indicates that the increase of stem strength is vital to improve lodging resistance in this region under the high-yielding condition when plant height is in an optimal range.

关键词： Triticum aestivum lodging resistance stem strength genetic progress Yellow-Huai River Valleys Winter Wheat Zone

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Partitioning of heavy metals in the surface sediments of Quanzhou Bay wetland and its availability to Suaeda australis

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Journal of Environmental Sciences 2006年第2期18卷 334-340页

作者： li yu-hong YAN Chong-ling yuAN jian-jun liu Jing-chun chen Huai-yu HU jun School of life Sciences Xiamen University Xiamen 361005 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China iology Department of Quanzhou Normal College Quanzhou 362000 China

In order to investigate distributions of heavy metal pollution in Quanzhou Bay wetland, the total concentration and chemical partitioning of a number of heavy metals （Cu, Zn, Cd, Pb, Cr, Hg） in sediments of three sampling sites of Quanzhou Bay wetland and their availability to Suaeda australis were analyzed. The Geoaccumulation Index （Igeo） values reveal that the sediments of three sampling sites may all be considered as moderately contaminated for Pb and Zn, and all sediments might be strongly contaminated with cadmium. The partitioning analyses revealed the measured heavy metals in three sites are bound to the exchangeable fraction at lower concentrations. The measured metals in a considerable amount are bound to the reducible and oxidizable fractions, and a high proportion of the measured heavy metals were distributed in the residual fraction in the sediment samples. The concentrations of Cd in each chemical phase extracted from the sediments are above natural global background levels and should be further investigated because of its toxicity. Suaeda australis has different accumulation abilities for the measured heavy metals. For the root and stem, the bioaccumulation ability assessed by bioaccumulation factor （BAF） for the measured heavy metals follows the decreasing order as： Cu〉Cr〉 Zn〉Cd, Pb, Hg. In the leaf, stronger bioaccumulation ability for Hg is exhibited. The heavy metal concentrations in Suaeda australis roots have positive correlations with their available fractions, while the exchangeable fraction of Cu and Cd might have be more important to both mature plant roots and seedling roots uptake than other fractions; as for Cr, the oxidizable fraction might make a greater contribution to the plant root uptake; as for Zn, the reducible fraction might make so contribution ; and for Pb, the oxidizable fraction might make a significant contribution to the mature plant root uptake, however, the exchangeable fraction might have a significant contribution to th

关键词： bioavailability geoaccumulation factor partitioning heavy metals Suaeda australis sediment Quanzhou Bay wetland

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Advanced carbon-based materials for Na,K,and Zn ion hybrid capacitors

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Rare Metals 2023年第3期42卷 719-739页

作者： jian Zhou hong-yu Hu hong-qiang li Zhi-Peng chen Chang-Zhou yuan Xiao-jun He School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243002China School of Material Science and Engineering University of JinanJinan250022China

Developing electrochemical energy storage devices with high energy and power densities,long cycling life,as well as low cost is of great *** metal-ion capacitors(MICs),commonly consisting of high energy battery-type anodes and high power capacitor-type cathodes,have become a trade-off between batteries and *** efforts have been devoted to searching for high-performance electrode materials due to poor rate capability of anodes,low capacity of cathodes,and interior sluggish kinetic *** materials with large surface area,good electrical conductivity and stability have been considered to be ideal candidates for electrodes of *** this review,the advanced carbon materials directly as cathodes and anodes of MICs are systematically ***,the key structural/chemical factors including the structure engineering,porous characteristics,and heteroatom incorporation for improving electrochemical performance of carbon materials are ***,the challenges and opportunities for future research on carbon materials in MICs are also proposed.

关键词： Metal-ion capacitor(MIC) Carbon materials Electrodes Structural/chemical factors Electrochemical performance

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Biomedical and Environmental Sciences 2021年第4期34卷 324-329页

作者： liu Xiao Bing WANG jun li Ya Jie TAN hong Xing liu Yan Yan yu Wei ZHANG yu YANG li chen PIAO jian Hua liu Xiao li YANG Xiao Guang Shenzhen Center for Chronic Disease Control Shenzhen 518020GuangdongChina Key Laboratory of Trace Element Nutrition of National Health Commission National Institute of Nutrition and HealthChinese Center for Disease Control and PreventionBeijing 100050China Changzhi Medical College Changzhi 047500ShanxiChina

Iodine is an essential component of thyroid hormones’biosynthesis and is crucial for normal growth and healthy development[1].If the amount of dietary iodine intake cannot match the long-term requirement,regardless of whether it is excessively low or high,it can cause various thyroid dysfunctions,including hyperthyroidism,hypothyroidism,and autoimmune thyroid diseases[2].

关键词： intake diseases dietary

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中国塑性成形技术和装备30年的重大突破与进展

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塑性工程学报 2024年第4期31卷 2-45页

作者：林忠钦黄庆学苑世剑赵国群华林易幼平詹梅李淑慧刘伟王宝雨陈军王涛李宏伟黄亮何祝斌钟掘上海交通大学上海市复杂薄板结构数字化制造重点实验室上海200240 太原理工大学机械与运载工程学院山西太原030024 哈尔滨工业大学金属精密热加工国家级重点实验室黑龙江哈尔滨150001 山东大学材料科学与工程学院山东济南250061 武汉理工大学汽车工程学院湖北武汉430070 中南大学轻合金研究院湖南长沙410083 西北工业大学材料学院陕西西安710072 北京科技大学机械工程学院北京100083 上海交通大学材料科学与工程学院上海200240 华中科技大学材料科学与工程学院湖北武汉430074 大连理工大学机械工程学院辽宁大连116023

1994以来的30年,在国家重大需求的强劲牵引下,我国塑性成形技术与装备取得举世瞩目的巨大成就,研制出一大批世界第一的成形装备,实现了三大技术跨越,形成了规模最大的研究队伍,我国塑性成形技术总体水平进入世界先进国家行列,多个单项... 详细信息

1994以来的30年,在国家重大需求的强劲牵引下,我国塑性成形技术与装备取得举世瞩目的巨大成就,研制出一大批世界第一的成形装备,实现了三大技术跨越,形成了规模最大的研究队伍,我国塑性成形技术总体水平进入世界先进国家行列,多个单项技术和装备达到国际领先水平。选择了其中8项最具代表性成果,并介绍其在塑性工程理论和技术上取得的重大突破以及对国家重大装备研制的突出贡献,分析了我国塑性成形技术与国际领先水平的差距。最后对我国塑性成形技术发展将呈现出的“三超两高”五大发展趋势进行了展望。

关键词：金属成形技术装备塑性

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Aging behavior and precipitate characterization of Zn-rich Al-Zn-Mg-Cu alloys with various Mg and Cu contents

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Journal of Iron and Steel Research International 2021年第8期28卷 1064-1073页

作者： Hai-chao li Ming li Dong-ye Yang Fu-yang Cao Yan-dong Jia Zhi-shui yu jian Zhao Tong liu hong Zhan qiang chen jian-fei Sun School of Materials Engineering Shanghai University of Engineering ScienceShanghai 201620China Sichuan Kelun Pharmaceutical Research Institute Chengdu 611138SichuanChina School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghai 200444China School of Mechanical and Automotive Engineering Anhui Polytechnic UniversityWuhu 241000AnhuiChina Southwest Technology and Engineering Research Institute Chongqing 400039China

Four Zn-rich Al-Zn-Mg-Cu alloys with different Mg and Cu contents were fabricated by spray *** effects of Mg and Cu contents on the aging behaviors of the whole precipitation process of the alloys were systematically *** results show that the primary precipitates in the under-aged and peak-aged alloys are GPⅡ and η'phases;no GPⅠ zones were *** aging,the dissolution driving force of the precipitates increases with increasing Mg content;therefore,the volume fraction of precipitates in the grain interior and the area fraction of precipitates at the grain boundary increase obviously,which contributes to a considerable improvement in yield strength and decrease in plasticity of the high Mg content *** content has no apparent effect on the size and volume fraction of ***,a higher Cu content can effectively prevent coarsening and transformation of precipitates,which is beneficial to maintain the peak aging state of the *** research provides a basis for the composition optimization of the rapid-solidified highly alloying Al-Zn-Mg-Cu alloys.

关键词： Al-Zn-Mg-Cu alloy Zn-rich alloy Aging behavior Precipitate characterization Property

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