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Fluid Dynamics & Materials Processing 2024年第7期20卷 1517-1537页

作者： Yuanjun dai Zetao Deng Baohua Li Lei Zhong Jianping Wang Mechanical and Electrical Engineering Institue Xinjiang Agricultural UniversityUrumqi830052China college of Mechanics Shanghai DianJi UniversityShanghai201306China School of Energy Engineering Xinjiang Institute of EngineeringUrumqi830023China

A combined experimental and numerical research study is conducted to investigate the complex relationship between the structure and the aerodynamic performances of an Archimedes spiral wind turbine(ASWT).Two ASWTs are considered,a prototypical version and an improved *** is shown that the latter achieves the best aerodynamic performance when the spread angles at the three sets of blades areα_(1)=30°,α_(2)=55°,α3=60°,respectively and the blade thickness is 4 *** a velocity V=10 m/s,a tip speed ratio(TSR)=1.58 and 2,the maximum cP values are 0.223 and 0.263 for the prototypical ASWT and improved ASWT,respectively,and the maximum c_(P) enhancement is 17.93%.For V=10 m/s and TSR=2,the cP values of the prototypical ASWT and improved ASWT are 0.225 and 0.263,respectively,with an aerodynamic performance enhancement of 16.88%.Through mutual verification of the test outcomes and numerical results,it is concluded that the proposed approach can effectively lead to aerodynamic performance improvement.

关键词： Archimedes spiral wind turbine aerodynamic performance numerical calculation

Let-7i-5p maintains the stemness via R-spondin2/Wnt pathway in hepatocellular carcinoma

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Genes & Diseases 2024年第4期11卷 20-23页

作者： Qinghua Wei xueshan dai Jiahui Wei Wenwei Sun xiaoqian Yang Yuxin Zhang xin Guo Yi chen college of Pharmaceutical Sciences&chinese Medicine Southwest UniversityChongqing 400716China center for Basic Medical Research TEDA International Cardiovascular HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeTianjin 300457China chongqing Key Laboratory of New Drug Screening from Traditional chinese Medicine Chongqing 400716China pharmacology of chinese Materia Medica-the Key Discipline constructed by the State Administration of Traditional chinese Medicine Chongqing 400716China Division of cell Developmental and Integrative BiologySchool of MedicineSouth China University of TechnologyGuangzhouGuangdong 510006China National Demonstration center for Experimental Pharmacy Education(Southwest University) Chongqing 400716China Engineering Research center of coptis Development and Utilization(Ministry of Education) College of Pharmaceutical Sciences and Chinese MedicineSouthwest UniversityChongqing 400716China

cancer stem cells(cScs)are related to tumorigenesis,recurrence,metastasis,and drug resistance in hepatocellular carcinoma(Hcc).1 Let-7i is a noncoding small RNA,belonging to the famous miRNA let-7 ***,let-7i has been ... 详细信息

关键词： hepatocellular cancer metastasis

Evidence for particle acceleration approaching PeV energies in the W51 complex

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Science Bulletin 2024年第18期69卷 2833-2841页

作者： cao, Zhen Aharonian, F. Axikegu Bai, Y.x. Bao, Y.W. Bastieri, D. Bi, x.J. Bi, Y.J. Bian, W. Bukevich, A.V. cao, Q. cao, W.Y. cao, Zhe chang, J. chang, J.F. chen, A.M. chen, E.S. chen, H.x. chen, Liang chen, Lin chen, Long chen, M.J. chen, M.L. chen, Q.H. chen, S. chen, S.H. chen, S.Z. chen, T.L. chen, Y. cheng, N. cheng, Y.D. cui, M.Y. cui, S.W. cui, x.H. cui, Y.D. dai, B.Z. dai, H.L. dai, Z.G. Danzengluobu Dong, x.Q. Duan, K.K. Fan, J.H. Fan, Y.Z. Fang, J. Fang, J.H. Fang, K. Feng, c.F. Feng, H. Feng, L. Feng, S.H. Feng, x.T. Feng, Y. Feng, Y.L. Gabici, S. Gao, B. Gao, c.D. Gao, Q. Gao, W. Gao, W.K. Ge, M.M. Geng, L.S. Giacinti, G. Gong, G.H. Gou, Q.B. Gu, M.H. Guo, F.L. Guo, x.L. Guo, Y.Q. Guo, Y.Y. Han, Y.A. Hasan, M. He, H.H. He, H.N. He, J.Y. He, Y. Hor, Y.K. Hou, B.W. Hou, c. Hou, x. Hu, H.B. Hu, Q. Hu, S.c. Huang, D.H. Huang, T.Q. Huang, W.J. Huang, x.T. Huang, x.Y. Huang, Y. Ji, x.L. Jia, H.Y. Jia, K. Jiang, K. Jiang, x.W. Jiang, Z.J. Jin, M. Kang, M.M. Karpikov, I. Kuleshov, D. Kurinov, K. Li, B.B. Li, c.M. Li, cheng Li, cong Li, D. Li, F. Li, H.B. Li, H.c. Li, Jian Li, Jie Li, K. Li, S.D. Li, W.L. Li, x.R. Li, xin Li, Y.Z. Li, Zhe Li, Zhuo Liang, E.W. Liang, Y.F. Lin, S.J. Liu, B. Liu, c. Liu, D. Liu, D.B. Liu, H. Liu, H.D. Liu, J. Liu, J.L. Liu, M.Y. Liu, R.Y. Liu, S.M. Liu, W. Liu, Y. Liu, Y.N. Luo, Q. Luo, Y. Lv, H.K. Ma, B.Q. Ma, L.L. Ma, x.H. Mao, J.R. Min, Z. Mitthumsiri, W. Mu, H.J. Nan, Y.c. Neronov, A. Ou, L.J. Pattarakijwanich, P. Pei, Z.Y. Qi, J.c. Qi, M.Y. Qiao, B.Q. Qin, J.J. Raza, A. Ruffolo, D. Sáiz, A. Saeed, M. Semikoz, D. Shao, L. Shchegolev, O. Sheng, x.D. Shu, F.W. Song, H.c. Stenkin, Yu.V. Stepanov, V. Su, Y. Sun, D.x. Sun, Q.N. Sun, x.N. Sun, Z.B. Takata, J. Tam, P.H.T. Key Laboratory of Particle Astrophysics & Experimental Physics Division & computing center Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China University of chinese Academy of Sciences Beijing 100049 China TIANFU cosmic Ray Research center Chengdu China Dublin Institute for Advanced Studies 31 Fitzwilliam Place 2 Dublin Ireland Max-Planck-Institut for Nuclear Physics P.O. Box 103980 Heidelberg 69029 Germany School of Physical Science and Technology & School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China School of Astronomy and Space Science Nanjing University Nanjing 210023 China center for Astrophysics Guangzhou University Guangzhou 510006 China Tsung-Dao Lee Institute & School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Institute for Nuclear Research of Russian Academy of Sciences Moscow 117312 Russia Hebei Normal University Shijiazhuang 050024 China University of Science and Technology of china Hefei 230026 China State Key Laboratory of Particle Detection and Electronics China Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210023 China Research center for Astronomical computing Zhejiang Laboratory Hangzhou 311121 China Key Laboratory for Research in Galaxies and cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China School of Physics and Astronomy Yunnan University Kunming 650091 China Key Laboratory of cosmic Rays (Tibet University) Ministry of Education Lhasa 850000 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100101 China School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai) Sun Yat-sen University Zhuhai 519000 & Guangzhou 510275 Guangdong China Institute of Frontier and

The γ-ray emission from the W51 complex is widely acknowledged to be attributed to the interaction between the cosmic rays (cRs) accelerated by the shock of supernova remnant (SNR) W51c and the dense molecular clouds in the adjacent star-forming region, W51B. However, the maximum acceleration capability of W51c for cRs remains elusive. Based on observations conducted with the Large High Altitude Air Shower Observatory (LHAASO), we report a significant detection of γ rays emanating from the W51 complex, with energies from 2 to 200 TeV. The LHAASO measurements, for the first time, extend the γ-ray emission from the W51 complex beyond 100 TeV and reveal a significant spectrum bending at tens of TeV. By combining the "π0-decay bump" featured data from Fermi-LAT, the broadband γ-ray spectrum of the W51 region can be well-characterized by a simple pp-collision model. The observed spectral bending feature suggests an exponential cutoff at ∼400 TeV or a power-law break at ∼200 TeV in the cR proton spectrum, most likely providing the first evidence of SNRs serving as cR accelerators approaching the PeV regime. Additionally, two young star clusters within W51B could also be theoretically viable to produce the most energetic γ rays observed by LHAASO. Our findings strongly support the presence of extreme cR accelerators within the W51 complex and provide new insights into the origin of Galactic cRs. © 2024 Science china Press

关键词： cosmic rays

Risk factors of non-arteritic anterior ischaemic optic neuropathy and central retinal artery occlusion

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International Journal of Ophthalmology(English edition) 2024年第5期17卷 869-876页

作者： chu-Han Ma cong-Yao Wang Ting-Ting dai Ting-Ting chen Wen-Hui Zhu Department of Ophthalmology the First Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080Guangdong ProvinceChina

AIM:To investigate the difference in risk factors between non-arteritic anterior ischaemic optic neuropathy(NAION)and central retinal artery occlusion(cRAO)and develop a predictive diagnostic ***:The study included 37 patients with monocular NAION,20 with monocular cRAO,and 24 with ***,age,and systemic diseases were *** routine,lipids,hemorheology,carotid and brachial artery doppler ultrasound,and echocardiography were *** optic disc area,cup area,and cup-to-disc ratio(c/D)of the unaffected eye in the NAION and cRAO group and the right eye in the hypertension group were ***:The carotid artery intimal medial thickness(c-IMT)of the affected side of the cRAO group was thicker(P=0.039)and its flow-mediated dilation(FMD)was lower(P=0.049)than the NAION *** with hypertension patients,NAION patients had higher whole blood reduced viscosity low-shear(WBRV-L)and erythrocyte aggregation index(EAI;P=0.045,0.037),and cRAO patients had higher index of rigidity of erythrocyte(IR)and erythrocyte deformation index(EDI;P=0.004,0.001).The optic cup and the c/D of the NAION group were smaller than the other two groups(Pc prediction model showed high diagnostic specificity(83.7%)and sensitivity(85.6%),which was highly related to hypertension,the c-IMT of the affected side,FMD,platelet(PLT),EAI,and c/***:cRAO patients show thicker c-IMT and worse endothelial function than *** and cRAO may be related to abnormal hemorheology.A small cup and small c/D may be involved in *** diagnostic nomogram can be used to preliminarily identify NAION and cRAO.

关键词： non-arteritic anterior ischaemic optic neuropathy central retinal artery occlusion risk factors diagnostic prediction model nomogram

Future Physics Programme of BESⅢ

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chinese Physics c 2020年第4期44卷 I0001-I0004,1-102页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht M.Alekseev A.Amoroso F.F.An Q.An Y.Bai O.Bakina R.Baldini Ferroli Y.Ban K.Begzsuren J.V.Bennett N.Berger M.Bertani D.Bettoni F.Bianchi J Biernat J.Bloms I.Boyko R.A.Briere L.calibbi H.cai x.cai A.calcaterra G.F.cao N.cao S.A.cetin J.chai J.F.chang W.L.chang J.charles G.chelkov chen G.chen H.S.chen J.c.chen M.L.chen S.J.chen Y.B.chen H.Y.cheng W.cheng G.cibinetto F.cossio x.F.cui H.L.dai J.P.dai x.c.dai A.Dbeyssi D.Dedovich Z.Y.Deng A.Denig Denysenko M.Destefanis S.Descotes-Genon F.De Mori Y.Ding c.Dong J.Dong L.Y.Dong M.Y.Dong Z.L.Dou S.x.Du S.I.Eidelman J.Z.Fan J.Fang S.S.Fang Y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici c.Q.Feng M.Fritsch c.D.Fu Y.Fu Q.Gao x.L.Gao Y.Gao Y.Gao Y.G.Gao Z.Gao B.Garillon I.Garzia E.M.Gersabeck A.Gilman K.Goetzen L.Gong W.x.Gong W.Gradl M.Greco L.M.Gu M.H.Gu Y.T.Gu A.Q.Guo F.K.Guo L.B.Guo R.P.Guo Y.P.Guo A.Guskov S.Han x.Q.Hao F.A.Harris K.L.He F.H.Heinsius T.Held Y.K.Heng Y.R.Hou Z.L.Hou H.M.Hu J.F.Hu T.Hu Y.Hu G.S.Huang J.S.Huang x.T.Huang x.Z.Huang Z.L.Huang N.Huesken T.Hussain W.Ikegami Andersson W.Imoehl M.Irshad Q.Ji Q.P.Ji x.B.Ji x.L.Ji H.L.Jiang x.S.Jiang x.Y.Jiang J.B.Jiao Z.Jiao D.P.Jin S.Jin Y.Jin T.Johansson N.Kalantar-Nayestanaki x.S.Kang R.Kappert M.Kavatsyuk B.c.Ke I.K.Keshk T.Khan A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.Kurth M.G.Kurth W.Kuhn J.S.Lange P.Larin L.Lavezzi H.Leithoff T.Lenz c.Li cheng Li D.M.Li F.Li F.Y.Li G.Li H.B.Li H.J.Li J.c.Li J.W.Li Ke Li L.K.Li Lei Li P.L.Li P.R.Li Q.Y.Li W.D.Li W.G.Li x.H.Li x.L.Li x.N.Li x.Q.Li Z.B.Li H.Liang H.Liang Y.F.Liang Y.T.Liang G.R.Liao L.Z.Liao J.Libby c.x.Lin D.x.Lin Y.J.Lin B.Liu B.J.Liu c.x.Liu D.Liu D.Y.Liu F.H.Liu Fang Liu Feng Liu H.B.Liu H.M.Liu Huanhuan Liu Huihui Liu J.B.Liu J.Y.Liu K.Y.Liu Ke Liu Q.Liu S.B.Liu T.Liu x.Liu x.Y.Liu Y.B.Liu Z.A.Liu Zhiqing Liu Y.F.Long x.c.Lou H.J.Lu J.D.Lu J.G.Lu Y.Lu Y.P.Lu c.L.Luo M.x.Luo P.W.Luo T.Luo x.L.Luo S.Lusso x.R.Lyu F.c.Ma H.L.Ma L.L.Ma M.M.Ma Q.M.Ma x.N.Ma x.x. Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany carnegie Mellon University PittsburghPennsylvania 15213USA central china Normal University Wuhan 430079China china center of Advanced Science and Technology Beijing 100190China cOMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and Technology Luoyang 471003China Huangshan college Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati I-00044FrascatiItaly INFN Sezione di Ferrara I-44122FerraraItaly Institute of Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany KVI-cART University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning University Shenyang 110036China Nanjing Normal University Nanjing 210023China Nanjing University Nanjing 210093China Nankai University Tianjin 300071China Peking University Beijing 100871China Shandong University Jinan 250100China Shanghai

There has recently been a dramatic renewal of interest in hadron spectroscopy and charm physics. This renaissance has been driven in part by the discovery of a plethora of charmonium-like xYZ states at BESⅢ and B factories, and the observation of an intriguing proton-antiproton threshold enhancement and the possibly related x(1835) meson state at BESⅢ, as well as the threshold measurements of charm mesons and charm baryons. We present a detailed survey of the important topics in tau-charm physics and hadron physics that can be further explored at BESⅢ during the remaining operation period of BEPcⅡ. This survey will help in the optimization of the data-taking plan over the coming years, and provides physics motivation for the possible upgrade of BEPcⅡ to higher luminosity.

关键词： meson hadron optimization

Ultra‑Efficient and cost‑Effective Platinum Nanomembrane Electrocatalyst for Sustainable Hydrogen Production

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Nano-Micro Letters 2024年第6期16卷 95-110页

作者： xiang Gao Shicheng dai Yun Teng Qing Wang Zhibo Zhang Ziyin Yang Minhyuk Park Hang Wang Zhe Jia Yunjiang Wang Yong Yang Department of Mechanical Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongPeople’s Republic of China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijingPeople’s Republic of China School of Engineering Science University of Chinese Academy of SciencesBeijingPeople’s Republic of China Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghaiPeople’s Republic of China School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjingPeople’s Republic of China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongPeople’s Republic of China

Hydrogen production through hydrogen evolution reaction(HER)offers a promising solution to combat climate change by replacing fossil fuels with clean energy ***,the widespread adoption of efficient electrocatalysts,such as platinum(Pt),has been hindered by their high *** this study,we developed an easy-to-implement method to create ultrathin Pt nanomembranes,which catalyze HER at a cost significantly lower than commercial Pt/c and comparable to non-noble metal *** Pt nanomembranes consist of highly distorted Pt nanocrystals and exhibit a heterogeneous elastic strain field,a characteristic rarely seen in conventional *** unique feature results in significantly higher electrocatalytic efficiency than various forms of Pt electrocatalysts,including Pt/c,Pt foils,and numerous Pt singleatom or single-cluster *** research offers a promising approach to develop highly efficient and cost-effective low-dimensional electrocatalysts for sustainable hydrogen production,potentially addressing the challenges posed by the climate crisis.

关键词： Platinum Hydrogen evolution reaction Lattice distortion Heterogeneous strain

Experimental measurements of gamma-photon production and estimation of electron/positron production on the PETAL laser facility

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Matter and Radiation at Extremes 2024年第5期9卷 32-47页

作者： F.Brun L.Ribotte G.Boutoux x.Davoine P.E.Masson-Laborde Y.Sentoku N.Iwata N.Blanchot D.Batani I.Lantuéjoul L.Lecherbourg B.Rosse c.Rousseaux B.Vauzour D.Raffestin E.D’Humières x.Ribeyre centre Lasers Intenses et Applications UMR 5107Universitéde Bordeaux-CNRS-CEA33405 TalenceFrance cEA DAMCESTAF-33116 Le BarpFrance cEA DAMDIFF-91297 ArpajonFrance cEA LMCEUniversitéParis-Saclay91680 Bruyères-le-ChâtelFrance Institute of Laser Engineering Osaka University2-6 YamadaokaSuitaOsaka 565-0871Japan

This article reports the first measurements of high-energy photons produced with the high-intensity PETawatt Aquitaine Laser(PETAL)*** experiments were performed during the commissioning of the *** laser had an energy of about 400 J,an intensity of 8×10^(18)W cm^(−2),and a pulse duration of 660 fs(FWHM).It was shot at a 2 mm-thick solid tungsten *** high-energy photons were produced mainly from the bremsstrahlung process for relativistic electrons accelerated inside a plasma generated on the front side of the *** paper reports measurements of electrons,protons and *** electrons up to35 MeV with a few-MeV temperature were recorded by a spectrometer,called SESAME(SpectreÉlectronS Angulaire MoyenneÉnergie).K-and L-shells were clearly detected by a photon spectrometer called SPEcTIx(Spectromètre Petalàcristal en TransmIssion pour le rayonnnement x).High-energy photons were diagnosed by cRAcc-x(cassette de RAdiographie centre chambre-rayonnement x),a bremsstrahlung *** cannon analysis is strongly dependent on the hypothesis adopted for the spectral *** shapes can exhibit similar reproductions of the experimental *** eliminate dependence on the shape hypothesis and to facilitate analysis of the data,simulations of the interaction were *** model the mechanisms involved,a simulation chain including hydrodynamic,particle-in-cell,and Monte carlo simulations was *** simulations model the preplasma generated at the front of the target by the PETAL laser prepulse,the acceleration of electrons inside the plasma,the generation of MeV-range photons from these electrons,and the response of the detector impacted by the energetic photon *** this work enabled reproduction of the experimental *** high-energy photons produced have a large emission angle and an exponential distribution *** addition to the analysis of the photon spectra,positron production was also ***,if high

关键词： process. positron hypothesis

Promotion effect of epoxy group neighboring single-atom cu site on acetylene hydrochlorination

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chinese chemical Letters 2024年第6期35卷 258-262页

作者： Junchen Peng xue Yin Dandan Dong Zhongyuan Guo Qinqin Wang Minmin Liu Fei He Bin dai chaofeng Huang School of chemistry and chemical Engineering/State Key Laboratory Incubation Base for Green Processing of chemical Engineering Shihezi UniversityShihezi 832000China college of chemistry&chemical Engineering Yantai UniversityYantai 264010China School of Material Science and Engineering University of JinanJi’nan 250022China

carbon materials have been used as the support for catalysts in the field of acetylene hydrochlorination,the influence of inevitable oxygen-containing moieties on the reaction is often ignored and the mechanism of the oxygen-doping structure remains ***,we explored the effect of the oxygen-containing group(c-O-c)in the support on the activity of single-atom dispersed cu *** immersing the cu single-atom catalyst in an alkaline solution,the epoxy species on the carbon support was cleaved to obtain a pure ether species while the cu site was modified to a more electron-deficient *** turnover frequency value of cu/O-FLP catalyst with epoxy groups was 1.6-fold higher than that of alkaline treated *** result indicated that the epoxy groups could assist adjacent single-atom cu sites to synergistically promote the adsorption and cleavage of the reactant hydrogen chloride toward form c-OH and cu-cl bonds,and reduce the reaction energy *** presence of electron deficient cu sites and ether species could induce competitive adsorption of the acetylene and hydrogen chloride,thereby reducing the activity of the *** study highlights the influence of surface oxygen species and the tunability of the support,providing the foundation for the fabrication of higher-activity cu catalysts for acetylene hydrochlorination.

关键词： Epoxy group Acetylene hydrochlorination Single-atom cu catalyst Synergistic dissociation

Oriented Generation of Novel Thermo-Sensitive Genic Male Sterile Lines with Improved Grain Shape and Outcrossing Rate in Early-Season Rice

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Rice science 2024年第2期31卷 129-133,I0001-I0016页

作者： ZHANG Huali cHEN Junyu LI Ruiqing WANG Huimei dai Dongqing LIANG Minmin WU Mingyue MA Liangyong State Key Laboratory of Rice Biology and Breeding/chinese National center for Rice Improvement China National Rice Research InstituteHangzhou 310006China

Two-line hybrid rice with excellent quality is preferred in the chinese ***,there is a trade-off between reducing costs for hybrid seed production and lowering the outcrossing rate of the sterile line,which is largely determined by the stigma exsertion rate(SER).In this study,we constructed mutants of male sterility lines with improved grain length(GL)and SER in three elite early-season indica rice varieties through targeted manipulation of the TMS5 and GS3 genes using cRISPR/cas9-mediated multiplex *** obtained a series of marker-free gs3 single mutants and gs3tms5 double mutants with significantly higher SER,longer grains,and increased 1000-grain weight compared with the wild type(WT).Importantly,the typically thermo-sensitive genic male sterile(TGMS)trait with a higher SER was observed in gs3tms5 mutants,and their F1 hybrids exhibited remarkable improvements in grain shape and yield-related *** findings provided an efficient method to generate new valuable TGMS germplasm with improved SER through the mutagenesis of GS3 and TMS5 synergistically,and demonstrated that GS3 had pleiotropic effects on grain size,SER,and grain quality in early-season indica rice.

关键词： sterile elite season

Interfacial reaction between AZ91D magnesium alloy melt and mild steel under high temperature

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china Foundry 2024年第2期21卷 159-167页

作者： Jia-hong dai Jian-yue Zhang Bin Jiang xiang-jun xu Zhong-tao Jiang Hong-mei xie Qing-shan Yang Guo-qing Zhang college of Materials Science and Engineering Yangtze Normal UniversityChongqing 408100China National Engineering Research center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China chongqing Jiulongyuan High-tech Industry Group co. Ltd.Chongqing 400080China Loncin Industry co. Ltd.Chongqing 400080China Department of Materials Science and Engineering The Ohio State UniversityColumbusOH 43210USA chongqing Key Laboratory of Materials Surface&Interface Science Chongqing University of Arts and SciencesChongqing 402160China School of Metallurgy and Material Engineering Chongqing University of Science and TechnologyChongqing 401331China

The metallurgical quality control of magnesium(Mg)and Mg alloys in melting process is required to ensure a satisfied mechanical and corrosion performance,while the typical used steel crucible introduces impurities and interfacial interaction during melting ***,a systematic study about impurities diffusion and interfacial interaction between molten Mg and steel is *** the present study,the interfacial reaction between molten AZ91D Mg alloy and mild steel during melting process was investigated with the melting temperatures of 700℃,750℃ and 800℃.The results show that Al(Fe,Mn)intermetallic layer is the intermetallic primarily formed at the interfaces of AZ91D melt and mild ***,Al_(8)(Mn,Fe)5is indexed between Al(Fe,Mn)and ***_(3)c appears between the mild steel and Al(Fe,Mn)at 700℃ and 750℃,but absent at 800℃ due to the increased solubility of carbon in Mg *** is found that the growth of the intermetallic layer is controlled by diffusion mechanism,and Al and Mn are the dominant diffusing species in the whole interfacial reaction *** measuring the thickness of different layers,the growth constant was *** increases from 1.89(±0.03)×10^(-12)m^(2)·s^(-1)at 700℃ to 3.05(±0.05)×10^(-12)m^(2)·s^(-1)at 750℃,and 5.18(±0.05)×10^(-12)m^(2)·s^(-1)at 800℃.Meanwhile,the content of Fe is linearly increased in AZ91D with the increase of holding time at 700℃ and 750℃,while it shows a significantly increment after holding for 8 h at 800℃,indicating holding temperature is more crucial to determine the Fe content of AZ91D than holding time.

关键词： AZ91D mild steel interface reaction intermetallic growth kinetics