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Observation of spectral lines in the exceptional GRB 221009A

Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 187-206页

作者： Yan-Qiu Zhang Shao-Lin Xiong Ji-Rong Mao Shuang-Nan Zhang Wang-Chen Xue Chao zheng Jia-Cong Liu Zhen Zhang Xi-Lu Wang Ming-Yu Ge Shu-Xu Yi Li-Ming Song zheng-Hua An Ce Cai Xin-Qiao Li Wen-Xi peng Wen-Jun Tan Chen-Wei Wang Xiang-Yang Wen Yue Wang Shuo Xiao Fan Zhang peng Zhang Shi-Jie zheng Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Yunnan Observatories Chinese Academy of SciencesKunming 650011China Center for Astronomical Mega-Science Chinese Academy of SciencesBeijing 100012China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China College of Electronic and Information Engineering Tongji UniversityShanghai 201804China

As the brightest gamma-ray burst ever observed,GRB 221009A provided a precious opportunity to explore spectral line *** this article,we performed a comprehensive spectroscopy analysis of GRB 221009A jointly with GECAM-C and Fermi/GBM data to search for emission and absorption *** the first time we investigated the line feature throughout this GRB including the most bright part where many instruments suffered problems,and identified prominent emission lines in multiple time *** central energy of the Gaussian emission line evolves from about 37 to 6 MeV,with a nearly constant ratio(about 10%)between the line width and central ***,we find that both the central energy and the energy flux of the emission line evolve with time as a power law decay with power law index of–1 and–2,*** suggest that the observed emission lines most likely origin from the blue-shifted electron positron pair annihilation 511 ke V *** find that a standard high latitude emission scenario cannot fully interpret the observation,thus we propose that the emission line comes from some dense clumps with electron positron pairs traveling together with the *** this scenario,we can use the emission line to directly,for the first time,measure the bulk Lorentz factor of the jet(Γ)and reveal its time evolution(i.e.,Γ~t^(-1))during the prompt ***,we find that the flux of the annihilation line in the co-moving frame keeps *** discoveries of the spectral line features shed new and important lights on the physics of GRB and relativistic jet.

关键词： GRB GRB 221009A emission line

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New perspectives on the genetic structure of dotted gizzard shad(Konosirus punctatus)based on RAD-seq

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Marine Life Science & Technology 2024年第1期6卷 50-67页

作者： Ying peng Yifan Liu Jiasheng Li Kun Zhang Xun Jin Sixu zheng Yunpeng Wang Zhenming Lu Liqin Liu Li Gong Bingjian Liu National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization Zhejiang Ocean UniversityZhoushan 316022China National Engineering Research Center for Facilitated Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316022China

To maintain,develop and rationally utilize marine organisms,understanding their genetic structure and habitat adaptation pattern is *** punctatus,which is a commercial fish species inhabiting the Indo-west Pacific Ocean,has shown an obvious annual global capture and aquaculture production decline due to climate changes and human *** the present study,restriction-site associated DNA sequencing(RAD-seq)was used to describe its genome-wide single nucleotide polymorphisms panel(SNPs).Among 146 individuals collected at nine locations scattered in China,Korea and Japan,a set of 632,090 SNPs were *** genetic analysis showed that *** individuals were divided into two significant genetic ***,potential genetic differentiation between northern and southern population of *** was *** results indicated that gene flow existed among sampling locations of ***,especially from southern Japan to ***,candidate genes associated with habitat adaptations of *** were identified,which are involved in diverse physiological processes of *** including growth and development(e.g.,KIDINS220,PAN3),substance metabolism(e.g.,PGM5)and immune response(e.g.,VAV3,CCT7,HSPA12B).Our findings may aid in understanding the possible mechanisms for the population genetic structure and local adaptation of ***,which is beneficial to establish the management and conservation units of ***,guiding the rational use of resources,with reference significance for a profound understanding of the adaptative mechanisms of other marine organisms to the environment.

关键词： Population structure Konosirus punctatus SNP RAD-seq Local adaptation

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A potential giant gallium deposit hosted in the tailing dam of the Fankou Zn-Pb deposit in northern Guangdong Province, South China

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China Geology 2024年第1期7卷 157-160页

作者： peng-peng Yu Zhao-bin Hu Yi zheng Lan-xuan Guo Shi-yuan Ouyang Gui-qiang Yuan Shang-zhou Chen Cheng-ming Wang Xi Chen School of Earth Sciences and Geological Engineering Sun Yat-sen UniversityGuangzhou 510275China Guangdong Provincial Key Lab of Geological Process and Mineral Resources Survey Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China Zhongjin Lingnan Nonfemet Co. LtdShenzhen 518000China

*** The Fankou giant zinc(Zn)-lead(Pb)deposit in Guangdong Province is well-known for its huge reserves of over 10 Mt(million ton)Zn+Pb metals and high ore-grade with Zn+Pb exceeding 15%(Guangdong Fankou Deposit Investigation Group,1980;Zhu XY et al.,2017).After 60 years of exploration and exploitation,the deposit has accumulated millions of tons of *** interesting question is that what components are hosted in these tailings,and whether some key and critical metals such as gallium and germanium are extremely enriched and worth further comprehensive *** motivated us to conduct an integrated set of field investigation,sampling,major-trace element analyses and reserve assessments about the Fankou *** this contribution,we discover that the tailings contain a variety of metal elements such as zinc,lead and gallium with comprehensive utilization *** data can act as a scientific guidance for further exploration and utilization of the Fankou tailings,and aid to enhance the utilization efficiency of the key mineral resource in *** study also provide demonstration for future green mine construction in China.

关键词： deposit comprehensive Guangdong

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Research progress of pavement icing status recognition and icing sensor

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Journal of Traffic and Transportation Engineering(English Edition) 2024年

作者： peng Guo Jiaomeng zheng Junfeng Gao Ruiqing Ma Hongren Gong Yuanzhao Chen National and Local Joint Engineering Research Center of Transportation and Civil Engineering Materials， Chongqing Jiaotong University School of Materials Science and Engineering， Chongqing Jiaotong University Planning and Construction Department of Luoyang High-tech Industrial Development Zone Key Laboratory of Road and Traffic Engineering of Ministry of Education， Tongji University School of Civil Engineering and Transportation， North China University of Water Resources and Electric Power

The state of the road surface weather is crucial to road safety， and road icing is one of the main factors causing traffic accidents. To promote the development of road icing recognition and sensing technology， this article reviews the research progress of road icing sensors both domestically and internationally. Firstly， the classification of pavement status was introduced， the hazards of pavement icing to traffic safety were clarified， and the importance of pavement icing identification to traffic safety management was recognized. Then， based on the different ways of pavement icing perception， the pavement icing sensor was divided into contact pavement icing sensor and non-contact pavement icing sensor， and the classification， working principle and characteristics of pavement icing sensor were analyzed and summarized. At the same time， based on the differences of different pavement state recognition technologies and the actual road inspection and monitoring needs， the application scope， recommendation index and improvement suggestions of various pavement icing sensors are given. Finally， the future improvement direction of pavement icing sensor is discussed. It is suggested that the meteorological information system of the road network should be combined with the road icing sensor to realize the timely warning of the road icing state and improve the road traffic safety.

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Unveiling size-fluorescence correlation of organic nanoparticles and its use in nanoparticle size determination

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Aggregate 2024年第1期5卷 331-336页

作者： Wu-Jie Guo Shixiang Ma Hui Wang Lu Qiao Lei Chen Chenyu Hong Bin Liu Xiaoyan zheng Hui-Qing peng State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion MaterialsKey Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering of Ministry of Industry and Information TechnologySchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijingChina

Quantitatively establishing the correlation between nanoparticle size and fluorescence is essential for understanding the behavior and functionality of fluorescent nanoparticles(FNPs).However,such exploration focusing on organic FNPs has not been achieved to ***,we employ the use of supramolecular polymeric FNPs prepared from tetraphenylethylene-based bis-ureidopyrimidinone monomers(bis-UPys)to relate the size to the fluorescence of organic *** an equal concentration of bis-UPys,a logarithmic relationship between them is built with a correlation coefficient higher than *** calculations indicate that variations in fluorescence intensity among FNPs of different sizes are attributed to the distinct molecular packing environments at the surface and within the interior of the *** leads to different nonradiative decay rates of the embedded and exposed bis-UPys and thereby changes the overall fluorescence quantum yield of nanoparticles due to their different specific surface *** established fluorescence intensity-size correlation possesses fine universality and reliability,and it is successfully utilized to estimate the sizes of other nanoparticles,including those in highly diluted dispersions of *** work paves a new way for the simple and real-time determination of nanoparticle sizes and offers an attractive paradigm to optimize nanoparticle functionalities by the size effect.

关键词： aggregation-induced emission fluorescence detection fluorescent nanoparticle nanoparticle size supramolecular polymer

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ICE optimization strategies of hard carbon anode for sodium-ion batteries:from the perspective of material synthesis

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Materials Futures 2024年第3期3卷 28-53页

作者： Huanbin zheng Jun Zeng Xuanhong Wan Xin Song Chenxi peng Jiarui Wang Luyi Sun Hui Wang Min Zhu Jun Liu School of Materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510641People’s Republic of China

With the continuous exploration of researchers in the field of sodium-ion batteries,the performance of these batteries has been greatly improved,and they have a wide range of application prospects in large-scale energy storage,traffic power and other *** carbon is the most important anode material for sodium-ion *** it has the advantages of low cost,stable structure and performance,it still has the problems of low initial Coulombic efficiency(ICE)and poor rate performance in *** order to solve the problem of low ICE of hard carbon anode in sodium-ion batteries,in recent years the literature about hard carbon anode in sodium-ion batteries has been comprehensively *** on the microstructure of hard carbon material,the causes of low ICE of hard carbon are *** the same time,from the point of view of material structure design and regulation,the current optimization strategies of hard carbon anode ICE are summarized,including the following aspects:optimization and improvement of the carbonization process,precursor screening and design,surface coating strategy,micro-pore structure control,catalytic carbonization *** hope that this review will provide reference for further optimization of hard carbon properties and its large-scale application in sodium-ion batteries.

关键词： sodium-ion batteries anode materials hard carbon initial Coulombic efficiency

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Clinical characteristics of peripapillary hyperreflective ovoid mass-like structures in myopic children

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International Journal of Ophthalmology(English edition) 2024年第7期17卷 1292-1299页

作者： Lu Zhang Zuo-Hui-Zi Yi Xuan Jiang Gong-peng Sun Fang Zhao Li Zhang Yi Xiang Chang-zheng Chen Department of Ophthalmology the Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014Hubei ProvinceChina Eye Center Renmin Hospital of Wuhan UniversityWuhan 430060Hubei ProvinceChina

AIM:To describe the characteristics of peripapillary hyperreflective ovoid mass-like structure(PHOMS)in myopic children and to investigate factors associated with ***:This retrospective observational study included 101 eyes of 101 children(age≤17y)with *** included patients underwent comprehensive clinical *** nerve canal parameters,including disc diameter,optic nerve head(ONH)tilt angle,and border tissue angle were measured using serial enhanced-depth imaging spectral-domain optical coherence tomography(EDI-OCT).Based on the optic disc drusen consortium’s definition of PHOMS,eyes were classified as PHOMS group and non-PHOMS *** was categorized according to ***:Sixty-seven(66.3%)eyes were found with *** PHOMS could only be detected by optical coherence tomography(OCT).Medium PHOMS could be seen with blurred optic disc borders corresponding to *** most frequent location of PHOMS was at the nasosuperior(91%,61 of 67 eyes)to ONH *** axial length and spherical equivalent were more myopic in the PHOMS group than in the non-PHOMS group(both P<0.001).ONH tilt angle was also significantly greater in PHOMS group than in non-PHOMS group[8.90(7.16-10.54)vs 3.93(3.09-5.25),P<0.001].Border tissue angle was significantly smaller in PHOMS group than in non-PHOMS group[29.70(20.90-43.81)vs 45.62(35.18-60.45),P<0.001].In the multivariable analysis,spherical equivalent(OR=3.246,95%CI=1.209-8.718,P=0.019)and ONH tilt angle(OR=3.275,95%CI=1.422-7.542,P=0.005)were significantly correlated with *** was no disc diameter associated with *** the linear regression analysis,border tissue angle was negatively associated with PHOMS height(β=-2.227,P<0.001).CONCLUSION:PHOMS is associated with optic disc tilt and optic disc nasal shift in *** diameter is not a risk factor for *** changes in ONH caused by axial elongation facilitated an understanding of the mechanism of PHOMS.

关键词： peripapillary hyperreflective ovoid masslike structure myopia optic disc edema enhanced-depth imaging spectral-domain optical coherence tomography

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Drainage of ascites in cirrhosis

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World Journal of Hepatology 2024年第9期16卷 1245-1257页

作者： Jia-Xing Yang Yue-Ming peng Hao-Tian Zeng Xi-Min Lin zheng-Lei Xu Department of Gastroenterology The Second Clinical Medical CollegeJinan UniversityShenzhen 518000Guangdong ProvinceChina Department of Nursing Shenzhen People’s HospitalThe Second Clinical Medical CollegeJinan UniversityShenzhen 518000Guangdong ProvinceChina Department of Gastroenterology Shenzhen People’s HospitalThe Second Clinical Medical CollegeJinan UniversityShenzhen 518000Guangdong ProvinceChina

For cirrhotic refractory ascites,diuretics combined with albumin and vasoactive drugs are the first-line choice for ascites ***,their therapeutic effects are limited,and most refractory ascites do not respond to medication treat-ment,necessitating consideration of drainage or surgical ***-sequently,numerous drainage methods for cirrhotic ascites have emerged,including large-volume paracentesis,transjugular intrahepatic portosystemic shunt,peritoneovenous shunt,automated low-flow ascites pump,cell-free and concentrated ascites reinfusion therapy,and peritoneal catheter *** review introduces the advantages and disadvantages of these methods in different aspects,as well as indications and contraindications for this disease.

关键词： Liver cirrhosis ascites Large-volume paracentesis Transjugular intrahepatic portosystemic shunt Peritoneovenous shunt Automated low-flow ascites pump Cell-free and concentrated ascites reinfusion therapy Peritoneal catheter drainage

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Syntheses and properties of associative acrylamide copolymers containing short hydrophobic chains used in a friction reducer for slick-water fracturing

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Petroleum Science 2024年第3期21卷 1889-1901页

作者： Ya-Xing Dai Xian-Li Zhang Si-Yuan Liu Feng-Run-Ze Zhang Yi-Xi Zhang Yu-Tong Sang Jing-Xi zheng Zhao-Sheng Liu peng Zhang College of Chemistry and Chemical Engineering Chongqing University of Science and TechnologyChongqing401331China College of Ecology and Environment Chongqing Resources and Environmental Protection of UniversityChongqing401331China China China Property Project Department of Dezhou Mining Property Service CenterShengli Oilfield Company of SinopecDezhou253000ShandongChina

Two allyldimethylalkyl quaternary ammonium salt(AQAS)monomers,N,N-dimethylallylphenylpropylammonium bromide(AQAS1)and N,N-dimethylallylnonylammonium bromide(AQAS2),were synthesized and used to prepare modified polyacrylamide *** new drag reducers were synthesized from acrylamide(AM),sodium acrylate(Na AA)and a cationic modified monomer(AQAS1 or AQAS2)via aqueous solution polymerization,and the copolymers were named P(AM/Na AA/AQAS1)and P(AM/Na AA/AQAS2),*** structures of the drag reduction agents were confirmed by IR and1H NMR *** molecular weight(Mw)of P(AM/Na AA/AQAS1)was 1.79×10^(6)g/*** the copolymer concentration was 1000 mg/L and the flow rate was 45 L/min,in fresh water the highest drag reduction rate was 75.8%,in 10,000 mg/L Na Cl solution the drag reduction rate decreased to 72.9%.The molecular weight of P(AM/Na AA/AQAS2)was 3.17×10^(6)g/*** the copolymer concentration was500 mg/L and the flow rate was 45 L/min,the drag reduction rate reached 75.2%,and in 10,000 mg/L Na Cl solution the drag reduction rate was 73.3%,decreased by approximately 1.9%.The drag reduction rate for partially hydrolyzed polyacrylamide(HPAM)was also investigated,and the results showed that the drag reduction rates for 500 and 1000 mg/L HPAM solutions were merely 43.2%and 49.0%in brine,*** with HPAM,both of the above copolymers presented better drag reduction capacities.

关键词： Shale gas Slick water Drag reducer Modified monomer Copolymerization

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Drug delivery with Mn-doped MoO_(2) for photothermalenhanced chemotherapy in fighting cancers

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Rare Metals 2024年第5期43卷 2230-2240页

作者： Ping Zhao Hai-Fa zheng Ju peng Xing-Long Li Fazal Raziq Xiao-Jun Liu Hao-Quan Yu Jin-Lu Tang Yi-Fan Kang Wen-Huan Huang School of Chemistry and Chemical Engineering Guangdong Pharmaceutical UniversityGuangzhou 510006China KAUST Catalysis Center King Abdullah University of Science and Technology23955-6900 ThuwalKingdom of Saudi Arabia Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi'an 710021China

Although chemotherapy has been intensively applied in cancer treatments,its inadequate therapeutic efficacy and severe side effects are still under constant *** used as anti-tumor drug delivery system(DDS)have attracted tremendous attentions owing to their various intriguing ***,Mn-doped MoO_(2)nanoparticles coated with ZrO_(2)and capped with Bi_(2)O_(3)have been designed as a DDS,namely *** possesses good magnetic properties,great photothermal conversion ability,sensitive tumor microenvironment(TME)responsiveness,and good biocompatibility in hemocompatibility in ***,MMZB has been utilized to load the chemotherapeutic agent daunomycin(DNM)(MMZB@DNM)for chemo-photothermal combined ***@DNM demonstrates a more impressive anti-cancer effect than the individual photothermal or chemotherapy both in vitro and in ***,the analysis of tumor specimen sections and serum levels after the treatment indicates negligible side effects for MMZB@DNM in *** contribution provides a valuable concept in designing therapeutic agents for achieving significantly enhanced tumor treatments,which benefits from the synergistic combination of chemotherapy and photothermal therapy in one single nanoagent.

关键词： Mn-doped MoO_(2) Bi_(2)O_(3) Nanocarrier Photothermal Chemotherapy

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