检索结果-南通市图书馆

Preliminary study on interaction between plant frictional root and rock-soil mass

Science china(Technological Sciences) 2010年第7期53卷 1938-1942页

作者： yan zhixin1’2. song yun3. jiang ping1’2.& wang houyu4 1 key laboratory of mechanics on disaster and environment in western china (lanzhou University),{2., lanzhou 73.000, china 2.School of Civil Engineering and mechanics, lanzhou University, lanzhou 73.000, china 3 College of Civil Engineering and mechanics, Central South University of Forestry and Technology, Changsha 410004, china 4 Air Force Engineering Design & Research Bureau, Beijing 100077, china 1. key laboratory of {2. on disaster and environment in western china (lanzhou University) Ministry of Education Lanzhou 730000 China2. School of Civil Engineering and Mechanics Lanzhou University Lanzhou 730000 China3. College of Civil Engineering and Mechanics Central South University of Forestry and Technology Changsha 410004 China4. Air Force Engineering Design & Research Bureau Beijing 100077 China

The interaction between lateral root system of woody plant and soil mass is similar to the one between shrub, herbage and soil mass, and has the effect of frictional reinforcement on slope soil. It plays an important role in reinforcing soil strength in shallow slope. Therefore, slope soil mass can be considered as a composite of soil and plant roots and the soil strength and stability of shallow slope soil mass are improved. However, current researches still remain on the level of qualitatively analyzing the relation between root and soil mass. In this paper, some exploratory researches on quantitative analysis of the interaction mechanism between root and soil mass are conducted. With the study of interaction between herbage root system (lateral root system of woody plants) and soil mass, the mechanical model of interaction between frictional root and soil mass is established. The accuracy of the model is verified by field experiments of Pinus yunnanensis. The mechanical model provides a crucial theoretical guidance to quantitatively analyzing the interaction between plant root and soil mass; it also has certain values in application.

关键词： plant slope protection vegetation for slope protection mechanical model frictional root

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Myristic Acid(MA) Promotes Adipogenic Gene Expression and the Differentiation of Porcine Intramuscular Adipocyte Precursor Cells

引用

Journal of Integrative Agriculture 2014年第11期13卷 2488-2499页

作者： LU Nai-sheng SHU Gang XIE Qiu-ping ZHU Xiao-tong GAO ping ZHOU Gui-xuan {2. song-bo {2. Li-na XI Qian-yun ZHANG Yong-liang jiang Qing-yan College of Animal Sciences South China Agricultural University

Intramuscular fat （IMF） content is considered to be a key factor that affects the marbling, tenderness, juiciness and lfavor of pork. To investigate the effects of myristic acid （MA） on the differentiation of porcine intramuscular adipocytes, cells were isolated from longissimus dorsi muscle （LDM） and treated with 0, 10, 50 or 100μmol L-1 MA. The results showed that MA signiifcantly promotes the differentiation of intramuscular adipocytes in a dose-dependent manner. MA also led to a parallel increase in the expression of peroxisome proliferator activated receptor-γ（PPARγ） and adipose-related genes, such as glucose transporter 1 （GLUT1）, lipoprotein lipase （LPL）, adipocyte fatty acid binding protein 4 （FABP4/aP2., fatty acid translocase （FAT）, acetyl-CoA carboxylaseα（ACCα）, adipose triglyceride lipase （ATGL） and fatty acid synthase （FASN）. However, no signiifcant effects of MA were observed on the expression of CAAT enhancer binding protein-α（C/EBPα） or hormone sensitive lipase （HSL）. The expression of pyruvate dehydrogenase kinase 4 （PDK4） was increased by MA during the early stages of differentiation （day 1-3）. In addition, MA also increased the absolute content of C14 （P〈0.001） and saturated fatty acids （SFA）（P〈0.05） to varying degrees, but no effects were observed on other fatty acids. These results suggest that MA might be able to enhance the IMF content of pork and increase the accumulation of myristic and myristoleic acid in muscle, which might have beneifcial implications for human health.

关键词： porcine intramuscular fat myristic acid adipogenesis fatty acid composition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Einstein Probe discovery of EP2.0408a:A peculiar X-ray transient with an intermediate timescale

引用

Science china(Physics,mechanics & Astronomy) 2024年

作者： Wenda Zhang Weimin Yuan zhixing Ling Yong Chen Nanda Rea Arne Rau Zhiming Cai Huaqing Cheng Francesco Coti Zelati Lixin Dai Jingwei Hu Shumei Jia Chichuan Jin Dongyue Li Paul O’Brien Rongfeng Shen Xinwen Shu Shengli Sun Xiaojin Sun Xiaofeng wang Lei {2.g Bing Zhang Chen Zhang Shuang-Nan Zhang Yonghe Zhang Jie An David Buckley Alexis Coleiro Bertrand Cordier Liming Dou Rob Eyles-Ferris Zhou Fan Hua Feng Shaoyu Fu Johan P. U. Fynbo Lluis Galbany Saurabh W. Jha Shuaiqing jiang Albert Kong Erik Kuulkers Weihua Lei Wenxiong Li Bifang Liu Mingjun Liu Xing Liu Yuan Liu Zhu Liu Chandreyee Maitra Alessio Marino Itumeleng Monageng Kirpal Nandra Jeremy Sanders Roberto Soria Lian Tao Junfeng wang song wang Tinggui wang Zhongxiang wang Qingwen Wu Xuefeng Wu Dong Xu {2.jun Xu Suijian Xue Yongquan Xue Zijian Zhang Zipei Zhu Hu Zou Congying Bao Fansheng Chen Houlei Chen Tianxiang Chen Wei Chen Yehai Chen Yifan Chen Chenzhou Cui Weiwei Cui {2.feng Dai Dongwei Fan Ju Guan Dawei Han Dongjie Hou Haibo Hu Maohai Huang Jia Huo Zhenqing Jia Bowen jiang Ge Jin Chengkui Li Junfei Li Longhui Li Maoshun Li Wei Li Zhengda Li Tianying Lian Congzhan Liu He{2.g Liu Huaqiu Liu Fangjun Lu Laidan Luo Jia Ma Xuan Mao Haiwu Pan Xin Pan Liming song Hui Sun yunyin Tan Qingjun Tang Yihan Tao Hao wang Juan wang Lei wang Wenxin wang Yilong wang Yusa wang Qinyu Wu Haitao Xu Jingjing Xu Xinpeng Xu yunfei Xu Zhao Xu Changbin Xue Yulong Xue Ailiang {2. Haonan {2.g Xiongtao {2.g {2.ji {2.g Juan Zhang Mo Zhang Wenjie Zhang Zhen Zhang Zhen Zhang Ziliang Zhang Donghua Zhao Haisheng Zhao Xiaofan Zhao Zijian Zhao Hong{2. Zhou Yilin Zhou Yuxuan Zhu Zhencai Zhu Institut d’Estudis Espacials de Catalunya (IEEC) Max Planck Institute for Extraterrestrial Physics Innovation Academy for Microsatellites Chinese Academy of Sciences Department of Physics University of Hong Kong School of Physics and Astronomy University of Leicester School of Physics and Astronomy Sun Yat-sen University National Astronomical Observatories Department of Physics Anhui Normal University Shanghai Institute of Technical Physics Chinese Academy of Sciences Physics Department Tsinghua University Nevada Center for Astrophysics University of Nevada Las Vegas Department of Physics and Astronomy University of Nevada Las Vegas Chinese Academy of Sciences South African Astronomical Observatory Department of Astronomy University of Cape Town Department of Physics University of the Free State Universite' Paris Cite' CNRS Astroparticule et Cosmologie Universite' Paris Cite' CEA Paris-Saclay School of Astronomy and Space Sciences IRFU/DAp-AIM Department of Astronomy Guangzhou University Cosmic Dawn Center (DAWN) Niels Bohr Institute University of Copenhagen Department of Physics and Astronomy Rutgers the State University of New Jersey Institute for Cosmic Ray Research University of Chinese Academy of Sciences The University of Tokyo ESA/ESTEC Noordwijk 2.01 AZ The Netherlands Department of Astronomy School of Physics Huazhong University of Science and Technology INAF-Osservatorio Astrofisico di Torino Sydney Institute for Astronomy School of Physics key laboratory of Particle Astrophysics The University of Sydney Department of Astronomy Xiamen University Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Department of Astronomy University of Science and Technology Hefei School of Astronomy and Space Sciences University of Science and Technology of china Institute of High Energy Physics Institute of Deep Space Sciences Deep Space Exploration laboratory Department of Astronomy School of Physics and Astronomy yunnan University Shanghai Astronomical Observatory Chinese Academy of Science

We report the discovery of a peculiar X-ray transient,EP2.0408a,by Einstein Probe （EP） and follow-up studies made with EP,Swift,NICER,GROND,ATCA and other ground-based multiwavelength *** new transient was first detected with Wide-field X-ray Telescope （WXT） on board EP on April 8th,2.2.,manifested in an intense yet brief X-ray flare lasting for *** flare reached a peak flux of 3.9×10-9erg cm-2.-1in 0.5-4 keV,300 times brighter than the underlying X-ray emission detected throughout the *** and more precise follow-up observations by EP/FXT,Swift and NICER confirmed the finding of this new *** X-ray spectrum is non-thermal in 0.5-10 keV,with a power-law photon index varying *** X-ray light curve shows a plateau lasting for4d,followed by a steep decay till becoming undetectable10 d after the initial *** on its temporal property and constraints from previous EP observations,an unusual timescale in the range of 7-2. d is found for EP2.0408a,which is intermediate between the commonly found fast and long-term *** counterparts have been found in optical and near-infrared,with the earliest observation at 17 h after the initial X-ray detection,suggestive of intrinsically weak emission in these *** demonstrate that the remarkable properties of EP2.0408a are inconsistent with any of the transient types known so far,by comparison with,in particular,jetted tidal disruption events,gamma-ray bursts,X-ray binaries and fast blue optical *** nature of EP2.0408a thus remains an *** suggest that EP2.0408a may represent a new type of transients with intermediate timescales of the order of10 *** detection and follow-ups of more of such objects are essential for revealing their origin.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Genetic dissection of wheat uppermost-internode diameter and its association with agronomic traits in five recombinant inbred line populations at various field environments

引用

Journal of Integrative Agriculture 2021年第11期20卷 2849-2861页

作者： LIU Hang TANG Hua-ping LUO Wei MU yang {2. Qian-tao LIU Ya-xi CHEN Guo-yue wang Ji-rui ZHENG Zhi QI Peng-fei {2. yun-feng CUI Fa song Yin-ming yan Gui-jun WEI Yu-ming LAN Xiu-jin ZHENG You-liang MA Jian State key laboratory of Crop Gene Exploration and Utilization in Southwest{2. Ministry of Science and Technology/Triticeae Research InstituteSichuan Agricultural UniversityChengdu 611130P.R.China Agriculture and Food CSIROSt LuciaBrisbane 4217Australia College of Agriculture Ludong UniversityYantai 264000P.R.China College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100093P.R.China School of Plant Biology The University of Western AustraliaPerth WA 6009Australia

Uppermost-internode diameter(UID)is a key morphological trait associated with spike development and yield potential in *** understanding of its genetic basis remains largely ***,quantitative trait loci(QTLs)for UID with high-density genetic maps were identified in five wheat recombinant inbred line(RIL)*** total,2. QTLs for UID were detected in five RIL populations,and they were located on chromosomes 1A,1D(3 QTL),2.(2.,2.(3),3B,3D,4A,4B(3),4D,5A(5),5B(2.,6B,and *** them,five major and stable QTLs(***-2.N-1D.1,***-2.Y-1D,***-QZ-2.,***-SC-3D,and ***-AS-4 B)were identified from each of the five RIL populations in multiple ***-2.N-1D.1,***-2.Y-1D and ***-SC-3D are novel *** Allele Specific PCR(KASP)markers tightly linked to them were further investigated for developing near-isogenic lines(NILs)carrying the major ***,candidate genes at these intervals harboring major and stable QTLs were predicted,and they were associated with plant development and water transportation in most *** of physical locations of the identified QTL on the‘Chinese Spring’reference genome showed that several QTLs including two major ones,***-2.N-1D.1 and ***-2.SY-1 D,are likely allelic confirming their validity and *** significant relationships detected between UID and other agronomic traits and a proper UID were ***,our results dissected the underlying genetic basis for UID in wheat and laid a foundation for further fine mapping and map-based cloning of these QTLs.

关键词： uppermost-internode diameter wheat yield potential genetic basis quantitative trait loci

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CEPC Technical Design Report

引用

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 Dan{2. 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 Bo{2. 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,2.15)and the Conceptual Design Report(CDR,2.18),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 2.2.-2.2.,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

来源：

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

Large area^(3)He tube array detector with modular design for multi‑physics instrument at CSNS

引用

Nuclear Science and Techniques 2023年第1期34卷 1-12页

作者： Lin Zhu Jian‑Rong Zhou Yuan‑Guang Xia Liang Xiao Hong Luo Xiao‑Juan Zhou Wen‑Qin yang Bei‑Ju Guan Xing‑Fen jiang yan‑Feng wang Hong Xu Hai‑yun Teng Li‑Xin Zeng Jia‑Jie Li Lei Hu Ke Zhou Yong‑Xiang Qiu Pei‑Xun Shen Jun Xu Li‑jiang Liao Xiao‑Zhuang wang Gui‑An yang Huai‑Chan Chen Ju‑ping Xu Zhi‑Duo Li song‑Lin wang Jian Zhuang Yu‑Bin Zhao Jun‑Rong Zhang Wen Yin Zhi‑Jia Sun Yuan‑Bo Chen Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China University of Chinese Academy of Sciences Beijing 100049China

The multi-physics instrument(MPI)is the first user cooperative instrument at the china Spallation Neutron Source(CSNS).It was designed to explore the structures of complex materials at multiple scales based on the neutron total scattering *** imposes the requirements for the detector,including a high detection efficiency to reduce the measurement time and a large solid angle coverage to cover a wide range of momentum *** satisfy these demands,a large-area array of 3He-filled linear position-sensitive detectors(LPSDs)was constructed,each with a diameter of 1 inch and pressure of 2. *** uses an orbicular layout of the detector and an eight-pack module design for the arrangement of 3He LPSDs,covering a range of scattering angles from 3°to 170°with a total detector area of approximately 7 *** detector works in air,which is separated from the vacuum environment to facilitate installation and *** characteristics of the MPI detector were investigated through Monte Carlo(MC)simulations using Geant4 and experimental *** results suggest that the detectors are highly efficient in the wavelength range of the MPI,and an efficiency over 2.%is achievable for above 0.1 A neutrons.A minimal position resolution of 6.4 mm full width at half maximum(FWHM)along the tube length was achieved at a working voltage of 2.00 V,and a deviation below 2.mm between the real and measured positions was attained in the beam *** detector module exhibited good consistency and an excellent counting rate capacity of up to 80 kHz,which satisfied the requirements of experiments with a high event *** of its operation over the past year have shown that the detector works steadily in sample experiments,which allows the MPI to serve the user program successfully.

关键词： Neutron detector LPSD Position resolution Counting rate capacity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

北京城市下垫面大气CO2.演算法

引用

遥感学报 2019年第6期23卷 1223-1231页

作者：吴浩王先华叶函函蒋芸段锋华吕松中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室合肥230031 中国科学技术大学合肥230031

大气温室气体监测仪GMI(Greenhouse gases Monitor Instrument)是高分五号(GF-5)卫星载荷之一,主要用于全球温室气体含量监测和碳循环研究。高精度反演是卫星大气CO2.感的基本需求。地表反射率影响卫星遥感辐射量及辐射传输过程中的地... 详细信息

大气温室气体监测仪GMI(Greenhouse gases Monitor Instrument)是高分五号(GF-5)卫星载荷之一,主要用于全球温室气体含量监测和碳循环研究。高精度反演是卫星大气CO2.感的基本需求。地表反射率影响卫星遥感辐射量及辐射传输过程中的地气耦合过程,严重制约着CO2.反演精度,针对GMI开发高精度的大气CO2.演算法,地表反射是一个需要重点考虑的因素。城市是CO2.要的发射源,且城市下垫面存在明显的二向反射特性,加上城市大气条件不良,复杂的地气耦合效应存在这都考验反演算法的准确性和鲁棒性。本文针对北京城市地区,利用2.11年-2.16年共5年的MODIS(MODerate-resolution Imaging Spectroradiometer)地表二向反射分布函数BRDF(Bidirectional Reflectance Distribution Function)数据,构建了适合利用单次观测数据反演的BRDF模型,并提出一种同时反演地表BRDF参数和大气CO2.量的算法。结果表明在550 nm波长处气溶胶光学厚度AOD(Aerosol Optical Depth)小于0.4时,大部分GMI模拟数据的反演误差控制在0.5%(~2.ppm)内。利用GOSAT(Greenhouse gases Observing SATellite)实测数据的反演结果与修正后的日本国立环境研究所NIES(National Institute for environmental Studies)反演结果进行对比,其平均误差为1.2. ppm,相关性达到0.85。本算法满足GMI数据在北京城市区域高精度CO2.演的需求,并使得反演高值气溶胶区域数据成为可能,增加了GMI观测数据的利用率。

关键词：高分五号 GMI CO2.演 BRDF 气溶胶

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

牛筋果中酚性化合物及其对DPPH自由基的清除活性

引用

天然产物研究与开发 2019年第10期31卷 1738-1744页

作者：唐小涵陈艳妮汤红玉李博婷汪云松曾英郝小江邸迎彤云南大学化学科学与工程学院昆明650091 中国科学院昆明植物研究所植物化学与西部植物资源持续利用国家重点实验室昆明650201

本文对牛筋果Harrisonia perforata(Blanco)Merr.中的酚性成分及其抗氧化活性进行了研究。从牛筋果小枝中分离得到了14个酚性化合物,分别鉴定为:去甲丁香色原酮(1)、柴胡色原酮A(2.、5,7-dimethoxy-2.methylchromone(3)、2.hydroxymethylalloptaeroxylin(4)、羟苯乙酯(5)、苯丙酮(6)、cephafortin B(7)、去氢双松柏醇(8)、hawthornnin C(9)、hawthornnin D(10)、丁香树脂酚(11)、皮树脂醇(12.、4-ketopinoresinol(13)、罗汉松脂酚(14)。化合物1、3、5~10和12.13共10个化合物为首次从植物牛筋果中分离得到。使用DPPH法筛选了化合物的抗氧化活性,其中,化合物13和14抗氧化活性优于阳性对照(其EC 50值分别为53.88±5.34和32.67±3.96μM),并对其构效关系进行了初步探讨。该结果为牛筋果的深度开发利用提供了理论依据。

关键词：牛筋果化学成分酚性化合物抗氧化活性构效关系.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Prevalence, awareness, treatment, and control of hypertension in the non-dialysis chronic kidney disease patients

引用

Chinese Medical Journal 2013年第12期126卷 2276-2280页

作者： ZHENG Ying CAI Guang-yan CHEN Xiang-mei FU ping CHEN {2.-hua DING Xiao-qiang YU Xue-qing LIN Hong-li LIU Jian XIE Ru-juan wang Li-ning NI Zhao-hui LIU Fu-you YIN Ai-ping XING Chang-ying wang Li SHI Wei LIU Jian-she HE Ya-ni DING Guo-hua LI Wen-ge WU Guang-li MIAO Li-ning CHEN Nan SU Zhen MEI Chang-lin ZHAO Jiu-yang GU Yong BAI yun-kai LUO Hui-min LIN Shan CHEN Meng-hua GONG Li yanG Yi-bin yanG Xiao-ping LI Ying WAN Jian-xin wang Nian-{12. LI Hai-ying XI Chun-sheng HAO Li XU yan FANG Jing-ai LIU Bi-cheng LI Rong-shan wang Rong ZHANG Jing-hong wang Jian-qin LOU Tan-qi SHAO Feng-min MEI Feng LIU Zhi-hong YUAN Wei-jie SUN Shi-ren ZHANG Ling ZHOU Chun-hua CHEN Qin-kai JIA Shun-lian GONG Zhi-feng GUAN Guang-ju XIA Tian ZHONG Liang-bao Department of Nephrology State key Laboratory of Kidney Disease Chinese PLA General Hospital Beijing 100853 China Nephrology Institute of the Chinese People's Liberation Army Chinese People's Liberation Army Key Laboratory of Nephrology Beijing 100853 China Department of Nephrology West China Hospital of Sichuan University Chengdu Sichuan 610041 China Department of Nephrology First Affiliated Hospital School of Medicine Zhejiang University Hangzhou Zhejiang 310003 China Department of Nephrology Zhongshan Hospital Fudan University Shanghai 200032 China Department of Nephrology First Affiiated Hospital of Sun Yat-sen University Guangzhou Guangdong 510080 China Department of Nephrology First Affiliated Hospital of Dalian Medical University Dalian Liaoning 116011 China Department of Nephrology First Affiliated Hospital of Xinjiang Medical University Urumqi Xinjiang 830054 China Department of Nephrology First Affiliated Hospital of Harbin Medical University Harbin Heilongjiang 150001 China Department of Nephrology First Afftiated Hospital of China Medical University Shenyang Liaoning 110001 China Department of Nephrology Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200025 China Department of Nephrology Second Xiangya Hospital Central South University Changsha Hunan 410000 China Department of Nephrology First Affiliated Hospital of Medical College Xi'an Jiaotong University Xi'an Shaanxi 710061 China Department of Nephrology First Affiliated Hospital of Nanjing Medical University (Jiangsu Province Hospital) Nanjing Jiangsu 210029 China Department of Nephrology Sichuan Provincial People's Hospital Chengdu Sichuan 610072 China Department of Nephrology Guangdong Provincial People's Hospital Guangzhou Guangdong 510030 China Department of Nephrology Affliated Xiehe Hospital Tongji Medical College Huazhong Science and Technology University Wuhan Hubei 430022 China Department of Nephrology Daping Hospital Third Military Medi

Background Data on the epidemiology of hypertension in Chinese non-dialysis chronic kidney disease （CKD） patients are *** aim of the present study was to investigate the prevalence,awareness,treatment,and control of hypertension in the non-dialysis CKD patients through a nationwide,multicenter study in *** The survey was performed in 61 tertiary hospitals in 31 provinces,municipalities,and autonomous regions in china （except Hong Kong,Macao,and Taiwan）.Trained physicians collected demographic and clinical data and measured blood pressure （BP） using a standardized *** was defned as systolic BP ≥140 mmHg and/or diastolic BP ≥90 mmHg,and/or use of antihypertensive *** 〈140/90 mmHg and 〈130/80 mmHg were used as the 2.thresholds of hypertension *** multivariate logistic regression with adjustment for sex and age,we analyzed the association between CKD stages and uncontrolled hypertension in non-dialysis CKD *** The analysis included 892. non-dialysis CKD *** prevalence,awareness,and treatment of hypertension in non-dialysis CKD patients were 67.3%,85.8%,and 81.0%,*** hypertensive CKD patients,33.1% and 14.1% had controlled BP to 〈140/90 mmHg and 〈130/80 mmHg,*** successive CKD stages,the prevalence of hypertension in non-dialysis CKD patients increased,but the control of hypertension decreased （P〈0.001）.When the threshold of BP 〈130/80 mmHg was considered,the risk of uncontrolled hypertension in CKD 2.3a,3b,4,and 5 stages increased 1.3,1.4,1.4,2.5,and 4.0 times compared with CKD 1 stage,respectively （P〈0.05）.Using the threshold of 〈140/90 mmHg,the risk of uncontrolled hypertension increased in advanced stages （P〈0.05）.Conclusions The prevalence of hypertension Chinese non-dialysis CKD patients was high,and the hypertension control was *** successive CKD stages,the risk of uncontrolled hypertension increased.

关键词： non-dialysis chronic kidney disease chronic kidney disease stages hypertension epidemiology

来源：

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

天琴计划简介

引用

中山大学学报（自然科学版） 2021年第1期60卷 1-19页

作者：罗俊艾凌皓艾艳丽安子聪白伟钢白彦峥包佳慧曹斌常文博陈琛陈厚源崔凯单莹丁延卫段会宗范会敏范磊范纹彤范霄冯文凡付新菊付瑜亮高晨光郜青高添泉高鑫高永新龚云贵谷德峰辜凌云郭兴韩西达何芸胡一鸣胡越新胡展黄顺佳黄祥青黄潇博纪沐婕蒋贇焦磊靳鸿鸣康小明匡双阳雷卫华李程远李洪银李珏李康康李萌李明黎明李涛李霄栋李语强李祝李竹溪黎樽彪练军想梁正程林伟凌晨刘辉刘佳恒刘建平刘力刘祺刘尚飞刘胜前刘帅刘旭辉刘雁冲刘源龙江龙军陆璐罗成健骆颖欣马波梅健伟孟云鹤明珉牛翔潘加键庞爱平彭慧生屈少波区子维任亮亮申荣锋沈岩石常富宋佳凝宋培义索晓晨谭柏轩谭定银檀庄斌涂良成王成王铖锐王凤彬王海天王继河王凌风王尚胜王泰卜汪旭东王炎汪洋汪一萍王智钊魏东东文明轩吴庆文吴勤勤吴书朝吴先霖夏冰夏旭肖青肖小圆谢宁徐家豪颜浩闫勇杨铖杨诚鋆杨涓杨列杨山清叶伯兵叶贤基叶小容尹航于达仁袁慧敏曾明张才士张德轩张建东张静怡张锦绣张居正张开张蜡宝张立华张涛张鑫张鑫2.张雪峰赵宏超赵玥赵泽伟周鸿博周金灵周立祥周泽兵朱凡朱炬波訾铁光邹远川 “天琴计划”教育部重点实验室中山大学天琴中心天琴前沿科学中心国家航天局引力波研究中心广东珠海519082 中山大学物理与天文学院广东珠海519082 华中科技大学物理学院湖北武汉430074 航天东方红卫星有限公司北京100094 中国科学院云南天文台云南昆明650011 哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150001 北京控制工程研究所北京100094 东北大学理学院辽宁沈阳110004 贵州大学电气工程学院贵州贵阳550025 南京大学电子科学与工程学院江苏南京210093 上海交通大学机械与动力工程学院上海200240 深圳技术大学工程物理学院广东深圳518118 武汉大学电子信息学院湖北武汉430072 西北工业大学航空航天学院陕西西安710072 西南大学物理科学与技术学院重庆400715 中国科学院紫金山天文台江苏南京210023 中山大学航空航天学院广东广州510006 冲绳科学技术大学院大学日本冲绳951-8073

天琴计划预期于2.35年左右发射并部署边长约17万公里的等边三角形卫星星座,构成一个引力波天文台—天琴。天琴将对10^(-4)~1 Hz频段的引力波进行探测,为人类描绘一幅更全面的宇宙图景。在本文中,我们对天琴计划的背景和提出过程、天琴... 详细信息

天琴计划预期于2.35年左右发射并部署边长约17万公里的等边三角形卫星星座,构成一个引力波天文台—天琴。天琴将对10^(-4)~1 Hz频段的引力波进行探测,为人类描绘一幅更全面的宇宙图景。在本文中,我们对天琴计划的背景和提出过程、天琴的主要探测对象和主要科学目标、天琴需要攻克的核心关键技术问题、天琴计划技术路线图及进展等进行介绍,以方便更多人加入这一项富有挑战而又激动人心的工作。

关键词：天琴计划空间引力波探测引力波

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：