检索结果-南通市图书馆

Isolation and Complete Nucleotide Sequence of the Measles Virus IMB-1 Strain in China

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2010年第6期25卷 381-389页

作者： shao-hui ma li-chun wang jian-sheng liu hai-jing shi long-ding liu qi-han li Institute of Medical Biology Chinese Academy of Medical Sciences and Peking Union Medical College Kunming 650118 China

The complete nucleotide sequence of the measles virus strain IMB-1,which was isolated in China,was *** in other measles viruses,its genome is 15,894 nucleotides in length and encodes six *** full-length nucleotide sequence of the IMB-1 isolate differed from vaccine strains (including wild-type Edmonston strain) by 4%-5% at the nucleotide sequence *** isolate has amino acid variations over the full genome,including in the hemagglutinin and fusion *** report is the first to describe the full-length genome of a genotype H1 strain and provide an overview of the diversity of genetic characteristics of a circulating measles virus.

关键词： Complete nucleotide sequence Genotype H1 Measles virus (MV)

Genetic Analysis of the VP1 Region of Human Enterovirus 71 Strains Isolated in Fuyang,China,During 2008

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2009年第3期24卷 162-170页

作者： shao-hui ma jian-sheng liu jing-jing wang hai-jing shi hui-juan YANG Jun-ying CHEN long-ding liu qi-han li Institute of Medical Biology Chinese Academy of Medical Sciences and Peking Union Medical College Kunming 650118 China

Enterovirus 71 （EV71） is a common cause of hand, foot, and mouth disease （HFMD） and may also cause severe neurological diseases, such as encephalitis and poliomyelitis-like paralysis. To examine the genetic diversity of EV71, we determined and analyzed the complete VP1 sequences （891 nueleotides） from nine EV71 strains isolated in Fuyang, China. We found that nine EV71 strains isolated were over 98% homologous at the nucleotide level and 93%-100% homologous tO members of the C4 subgenogroup. At the amino acid level, these Fuyang strains were 99% -100% homologous to one another, 97%-100% homologous to members of the C4 subgenogroup, and the histidine（H） at amino acid position 22 was conserved among the Fuyang strains. The results indicate that Fuyang isolates belong to genotype C4, and an H at position 22 appears to be a marker for the Fuyang strains.

关键词： VP1 gene Genotype C Enterovirus 71(EV71)

High-Spin States in the Odd-Odd Nucleus 92Nb

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2014年第4期31卷 30-32页

作者： WU Yi-Heng LU jing-Bin LUO Peng-Wei li Guang-sheng li Hong-Wei WU Xiao-Guang HE Chuang-Ye ZHENG Yun ma Ke-Yan YANG Dong li Cong-Bo HU shi-Peng liu Jia-jian wang Jin-long YAO Shun-He CHEN qi-Ming ZHONG jian College of Physics Jilin University Changchun 130012 China Institute of Atomic Energy Beijing 102413 College of Physics and Technology Shenzhen University Shenzhen 518060

High spin states of the odd-odd nucleus 92Nb are investigated using the S2Se （14N, 4n）92Nb reaction at a beam energy of 54MeV. The level scheme of the 92Nb was extended up to Jπ=（16＋） at about 7.3 MeV and Jπ=（21-） at about 9.7MeV. According to systematic analyses and a comparison with the neighboring nucleus, the higher spin states could be interpreted by the multi-particle excitations in the π（fs/2,P3/2,p1/2,gg/2）@v（p1/x,gg/2,d5/2, g7/2） configuration space.

关键词： Odd-Odd Nucleus ~(92)Nb High-Spin odd-odd

Waveguide distribution system of the HEPS linac

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2023年第4期7卷 502-513页

作者： Xiang He jing-Ru Zhang Hua shi Ou-Zheng Xiao jing-Dong liu Nan Gan Hao Zeng Xiao-Ping li Guan Shu Feng-li Zhao sheng-Chang wang Xin-Peng ma Cai Meng Da-Yong He Fei li Dong Dong Zu-sheng Zhou jing-Yi li jian-li wang Bing-lin Deng Pi-long Tian Xu-jian wang Hong Song qi Yang Xiang-Cheng Kong National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei230029China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Zhang jiang Laboratory Shanghai200120China

Purpose The High-Energy Photon Source(HEPS)is a 6 GeV storage ring-based light source under construction in Beijing,*** accelerator consists of a 6 GeV storage ring,a full-energy booster,an S-band normal-conducting 500 MeV linac,and three transport *** the beginning of HEPS,a stable linac is quite important,which needs a qualified waveguide distribution system to transmit microwave power from klystrons to accelerating *** Installation and high-power conditioning of the HEPS linac were performed from February to September *** assembly and conditioning of the waveguide distribution system were completed in April and July,*** design of the waveguide distribution system began in 2018 and was finalized at the end of 2020 after multiple *** Owing to careful design,fabrication,and assembly preparation,the assembly and conditioning of the system proceeded smoothly and considerable time was *** The entire process from the design to the ultimate realization of the system is introduced in detail in this *** measurement results were obtained for some waveguide components.

关键词： HEPS linac Waveguide distribution system System design Assembly and commissioning High-power conditioning

Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 195-206页

作者： hai-sheng Zhao Dong li shao-lin Xiong Yan-qiu Zhang Yang Su Wei Chen Yi Zhao Xiao-Bo li Jia-Cong liu Wen-Xi Peng Rui qiao Xin-qiao li Xiang-Yang Wen li-Ming Song shi-Jie Zheng Xin-Ying Song Xiao-Yun Zhao Yue Huang Shuang-Nan Zhang Shuo Xiao Ce Cai Zheng-Hua An Can Chen Gang Chen Wei Chen Yan-qi Du Min Gao Ke Gong Dong-Ya Guo Zhi-Wei Guo jian-jian He Bin li Chao li Chao-Yang li Gang li jian-hui li Lu li qing-Xin li Yan-Guo li jing liang Xiao-Hua liang Jin-Yuan liao Xiao-jing liu Ya-qing liu qi Luo Xiang ma Bin Meng Ge Ou Dong-li shi jing-Yan shi Gong-Xing Sun Xi-Lei Sun You-li Tuo Chen-Wei wang hui wang Jin wang Jin-Zhou wang Ping wang Wen-Shuai wang Hong Wu sheng-Lun Xie Yan-Bing Xu Yu-Peng Xu wang-Chen Xue sheng Yang Min Yao jian-Ying Ye qi-Bin Yi Chao-Yue Zhang Da-li Zhang Fan Zhang Fei Zhang Hong-Mei Zhang Kai Zhang Peng Zhang Xiao-Lu Zhang Zhen Zhang Guo-Ying Zhao shi-Yi Zhao Chao Zheng Xing Zhou Yue Zhu Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China Physics and Space Science College China West Normal UniversityNanchong 637002China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics Changchun University of Science and TechnologyChangchun 130022China College of Physics and Engineering Qufu Normal UniversityQufu 273165China College of Physics Sciences&Technology Hebei UniversityBaoding 071002China

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)during the flare event on 2022 April 21 at 01:52 *** subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase,and the key feature is that they appear in pairs and seem like double-peak *** subpeaks are rarely observed in hard X-ray band and confirmed by the microwave obtained by Nobeyama Radio Polarimeters(NoRP)and Radio Solar Telescope Network(RSTN).While an exponential function can describe the continuum component of the time profile from the precursor to part of the impulsive *** periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase,respectively,with at least 95%confidence *** paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our *** precursor phase can be interpreted as the oscillating coalescence of two islands,while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

关键词： solar flare QPPs loop coalescence circular-ribbon flare

Novel evidence for the σ-bond linear-chain molecular structure in ^(14)C

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第8期45卷 71-75页

作者： han-zhou Yu jing li Yan-lin Ye BiaoYang Cheng-jianlin hui-Ming Jia jian-ling Lou Xiao-Fei Yang T.Baba qi-Te li Yu-Cheng Ge Zhi-Huan li hui Hua Jin-Yan Xu Zai-Hong Yang Jun Feng Hong-liang Zang qiang liu Wei jiang Yang liu jing-jing li Wei liu shi-Wei Bai Jie Chen Jia-Xing han Jia-Hao Chen Kai ma Dong-Xi wang Lei Yang Nan-Ru ma li-Jie Sun School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China FRIB/NSCL Laboratory Michigan State UniversityEast LansingMichigan 48824USA China Institute of Atomic Energy Beijing 102413China Kitami Institute of Technology 090-8507 KitamiJapan Research Center for Nuclear Physics(RCNP) Osaka University10-1 MihogaokaIbarakiOsaka 567-0047Japan Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China

A multi-nucleon transfer and cluster decay experiment,^(7)li(^(11)B,^(14)C^(*)→α+^(10)Be)α,is conducted at an incident beam energy of 55 *** reaction channel has a significantly large 0-value,which favors populating the high lying resonant states in ^(14)*** decay paths,from these resonances to various states of the final nucleus ^(10) Be,can be selected,owing to the experimentally achieved optimal resolution of the Q-value spectrum.A number of resonant states are reconstructed from the forward emitting 10Be+α fragments,and their major molecular structures can be detected according to the selective decay paths and relative decay widths.A state at 22.4(2)MeV validates the previously measured and theoretically predicted band head of the positive-parity σ-bond linear-chain mo-lecular *** additional resonances at 22.9(2)and 24.2(2)MeV are identified and consistent with the predicted 2^(+) and 4^(+) members of the same molecular band,thus providing novel evidences for the existence of the exotic clustering chain structure in neutron-rich carbon isotopes.A few high energy resonances,which also indicate the presence of the σ-bond molecular structure,are observed;however,further studies are still required to clarify their ascription in band systematics.

关键词： linear-chain state reaction 0-value transfer reaction cluster decay relative branching ratio

Early diagnosis of primary gallbladder carcinoma

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2002年第2期1卷 273-275页

作者： jing-Sen shi jian-sheng wang Gang liu Yue-li Yu Yun Lu Xin-Yuan Jiao Yi-Jun Yang Guo-Cai li Yue han From the Department of Hopatobiliary Surgery, First Hospital of Xi’an Jiaotong University, Xi’an 710061, China Department of Hepatobiliary Surgery First Hospital of Xi'an Jiaotong University Xi'an 710061 China. wjsdxy@***

Objective: To improve early diagnosis of primary gallbladder carcinoma (PGC) and the understanding of its pathogenesis, pathological stages and progno- sis. Methods: The data from 679 patients with PGC trea- ted in our hospital from 1956 to 1998 were analyzed retrospectively. Results: The incidence of PGC has been increasing in recent years, and the treatment is not satisfactory. Upon diagnosis, most patients with PGC were at ad- vanced stage. PGC was usually found in elderly women. The ratio of man to woman was 1:3. The gallstone, closely related to PGC, was found in 60% of the patients with PGC. The diagnostic accordance rate before and after operation was Iow. In most pa- tients, PGC was found unexpectedly during opera- tion for gallstone or acute cholecystitis. many pa- tients with PGC missed the opportunity of diagnosis and therapy because doctor only noticed the diagnosis of gallstone. Pathological classification revealed that PGC in most patients (84.4%) were adenocarcino- ma. Imaging helped to find early-stage cases and im- prove prognosis. Conclusions: Understanding of pathogenesis, patho- logical stages and prognosis of PGC and proper use of various examinations are essential to the early di- agnosis and treatment of the disease.

关键词： primary gallbladder carcinoma early diagnosis

long-term analysis of clear nights using satellite data considering astronomical sites in western China

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2020年第6期20卷 96-108页

作者： Zi-Huang Cao li-Yong liu Yong-Heng Zhao Lu Feng Hugh RAJones Huang Shen Jin-Xin Hao Yan-Jie Xue Yong-qiang Yao jing Xu Ali Esamdin Zhao-Xiang qi jian-Rong shi jian li Yuan Tian Zheng wang Tai-sheng Yan Xia wang jian-Ping Xiong Si-Cheng Yu Jun-Bo Zhang Zhi-Xia Shen Yun-Ying jiang Jia Yin Guang-Xin Pu Peng Wei chun-hai Bai Guo-Jie Feng Lu ma Teng-Fei Song jian-Feng wang jian-Feng Tian Xian-Qun Zeng Zhi-Gang Hou shi-long liao Zhi-Song Cao Dong-Wei Fan Yun-Fei Xu Chang-Hua li Yi-han Tao National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Centre for Astrophysics University of HertfordshireHatfieldUK School of Journalism.Communication University of China Beijing 100024China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Yunnan Observatories Chinese Academy of SciencesKunming 650216China

A large ground-based optical/infrared telescope is being planned for a world-class astronomical site in *** cloud-free night percentage is the primary meteorological consideration for evaluating candidate *** data from GMS and NOAA satellites and the MODIS instrument were utilized in this research,covering the period from 1996 to *** data analysis benefits from overlapping results from different independent teams as well as a uniform analysis of selected sites using GMS+NOAA *** significant ground-based monitoring is needed to validate these findings,we identify three different geographical regions with a high percentage of cloud-free conditions(~83%on average),which is slightly lower than at mauna Kea and Cerro Armazones(~85%on average)and were chosen for the large international projects TMT and ELT *** study finds evidence that cloud distributions and the seasonal changes affected by the prevailing westerly winds and summer monsoons reduce the cloud cover in areas influenced by the *** is consistent with the expectations from climate change models and is suggestive that most of the identified sites will have reduced cloud cover in the future.

关键词： methods statistical-site testing-atmospheric effects-MODIS

SAPT:a synchrotron-based proton therapy facility in Shanghai

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2023年第10期34卷 36-46页

作者： man-Zhou Zhang De-Ming li li-Ren Shen hai-Rong Zhang Zhi-ling Chen han-Wen Du Ming Gu Rui li De-Kang liu Yue-Hu Pu Jun-Feng Yu jian-Feng Chen Chu Chen chun-long Guo Hao Guo Ge-Yang jiang Zhi-qiang jiang lin Jin Wen-jing li Xiu-Fang li Ye lin Ming liu Yong-Hao liu Ya-Juan liu Ming Lv qing-Ru Mi lian-Hua Ouyang Wei-Guo shi hang Shu qi-sheng Tang Kun wang Zhi-Shan wang Jun Wu Xiao-Bing Wu Jia-qiang Xu Wen-Zhen Xu Chong-Xian Yin Cheng Yu Ren-Xian Yuan qi-Bing Yuan hai-Qun Zhang Miao Zhang Wen-Zhi Zhang li-Ying Zhao Wei-Min Zhou Shou-Xian Fang Xi-Dong Sun Zhen-Tang Zhao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China APACTRON Particle Equipment Co. Ltd.Shanghai 201815China The Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Because of its excellent dose distribution,proton therapy is becoming increasingly popular in the medical application of cancer treatment.A synchrotron-based proton therapy facility was designed and constructed in *** synchrotron,beam delivery system,and other technical systems were commissioned and reached their expected *** a clinical trial of 47 patients was finished,the proton therapy facility obtained a registration certificate from the National Medical Products *** characteristics of the accelerator and treatment systems are described in this article.

关键词： Proton therapy Synchrotron Slow extraction Gantry Beam delivery system