咨询与建议

限定检索结果

文献类型

  • 2,419 篇 期刊文献
  • 1,756 篇 学位论文
  • 53 篇 会议
  • 27 篇 成果
  • 18 册 图书
  • 3 篇 科技报告

馆藏范围

  • 4,269 篇 电子文献
  • 8 种 纸本馆藏

日期分布

学科分类号

  • 1,271 篇 理学
    • 885 篇 生物学
    • 222 篇 化学
    • 95 篇 物理学
    • 85 篇 数学
    • 36 篇 统计学(可授理学、...
  • 741 篇 医学
    • 417 篇 临床医学
    • 326 篇 基础医学(可授医学...
    • 116 篇 药学(可授医学、理...
    • 114 篇 中西医结合
    • 96 篇 医学技术(可授医学...
    • 37 篇 中药学(可授医学、...
    • 34 篇 公共卫生与预防医...
  • 703 篇 工学
    • 137 篇 化学工程与技术
    • 121 篇 材料科学与工程(可...
    • 107 篇 生物医学工程(可授...
    • 58 篇 电气工程
    • 50 篇 环境科学与工程(可...
    • 44 篇 计算机科学与技术...
    • 39 篇 电子科学与技术(可...
    • 37 篇 机械工程
    • 31 篇 生物工程
  • 186 篇 农学
    • 31 篇 作物学
  • 103 篇 经济学
    • 68 篇 应用经济学
    • 33 篇 理论经济学
  • 63 篇 教育学
    • 34 篇 教育学
    • 29 篇 心理学(可授教育学...
  • 59 篇 管理学
    • 33 篇 管理科学与工程(可...
  • 54 篇 法学
    • 32 篇 社会学
  • 52 篇 哲学
    • 49 篇 哲学
  • 39 篇 文学
    • 29 篇 外国语言文学
  • 27 篇 历史学
  • 12 篇 艺术学
  • 2 篇 军事学

主题

  • 4,276 篇 f
  • 1,980 篇 n
  • 1,943 篇 a
  • 1,882 篇 i
  • 1,850 篇 e
  • 1,829 篇 r
  • 1,821 篇 c
  • 1,813 篇 o
  • 1,782 篇 t
  • 1,769 篇 s
  • 1,768 篇 ,
  • 1,690 篇 l
  • 1,462 篇 m
  • 1,258 篇 d
  • 1,238 篇 p
  • 1,133 篇 g
  • 1,121 篇 u
  • 855 篇 h
  • 792 篇 y
  • 706 篇 b

机构

  • 64 篇 the george washi...
  • 59 篇 university of ph...
  • 46 篇 university of ca...
  • 40 篇 state university...
  • 36 篇 capella universi...
  • 32 篇 columbia univers...
  • 32 篇 the university o...
  • 30 篇 yale university
  • 25 篇 utica college
  • 25 篇 northcentral uni...
  • 24 篇 the johns hopkin...
  • 22 篇 princeton univer...
  • 21 篇 walden universit...
  • 21 篇 california state...
  • 21 篇 university of ke...
  • 20 篇 harvard universi...
  • 20 篇 the university o...
  • 19 篇 georgetown unive...
  • 18 篇 university of il...
  • 18 篇 the university o...

作者

  • 12 篇 horton p
  • 10 篇 hodges m
  • 8 篇 graber p
  • 7 篇 martirosov sm
  • 7 篇 allen jf
  • 7 篇 godinot c
  • 7 篇 harris da
  • 7 篇 ernster l
  • 6 篇 trchounian aa
  • 6 篇 barber j
  • 6 篇 grivas s
  • 6 篇 houstek j
  • 6 篇 vignais pv
  • 6 篇 sandip basu
  • 6 篇 wollman fa
  • 6 篇 golbeck jh
  • 6 篇 futai m
  • 6 篇 briantais jm
  • 6 篇 milgrom ym
  • 6 篇 gautheron dc

语言

  • 3,119 篇 英文
  • 745 篇 其他
  • 391 篇 中文
  • 11 篇 荷兰文
  • 5 篇 法文
  • 4 篇 西班牙文
  • 3 篇 德文
  • 2 篇 俄文
  • 1 篇 捷克文
  • 1 篇 波兰文
检索条件""
4276 条 记 录,以下是281-290 订阅
排序:
Identification and characterization of fungi pathogen causing fruit rot disease of watermelon (Citrullus lanatus)
收藏 引用
ARCHIVES Of PHYTOPATHOLOGY AND PLANT PROTECTION 2022年 第3期55卷 344-354页
作者: Oyedeji, E. O. Arogundade, O. Tairu, f. M. Elum, C. G. Natl Hort Res Inst PMB 5432 Ibadan Oyo State Nigeria
Postharvest rot caused by fusarium species is considered one of the most devastating diseases limiting production and commercialization of water melon worldwide. Two economically important fungi species are generally ... 详细信息
来源: 评论
Chemometric mapping of polychlorinated dibenzo-p-dioxin (PCDD) and dibenzofuran (PCDf) congeners from the Passaic River, NJ: Integrated application of RSIMCA, PVA, and t-SNE
收藏 引用
ENVIRONMENTAL fORENSICS 2021年 第1-2期22卷 155-171页
作者: Cejas, Mark J. Barrick, Robert C. Infin Solut Grp 12565 42nd Ave NE Seattle WA 98125 USA ChemQuants Santa Barbara CA USA
Robust Independent Modelling of Class Analogy (RSIMCA) was applied to classify over 2,800 Passaic River sediment samples into seven groups or not assigned to any group after an initial screening of a 3,255 sample data... 详细信息
来源: 评论
Liquid Chromatography Mass Spectrometry Study of a Eutectic Mixture of bis(2,2-Dinitropropyl) Acetal/formal
收藏 引用
PROPELLANTS EXPLOSIVES PYROTECHNICS 2021年 第12期46卷 1849-1859页
作者: Wong, Camille Hing Edgar, Alexander Steven Yang, Dali Los Alamos Natl Lab Engn Mat Grp MST 7 Mat Sci & Technol Div Los Alamos NM 87545 USA
This study is the first attempt to document methodology development undergone using liquid chromatography tandem quadrupole time of flight mass spectrometry (LC-QTOf) to investigate degradation products of eutectic bi... 详细信息
来源: 评论
Structural transitions and magnetocaloric properties of low-cost MnNiSi-based intermetallics
收藏 引用
INTERMETALLICS 2023年 154卷
作者: Eggert, B. G. f. Belo, J. f. H. Araujo, J. P. Hauback, B. C. frommen, C. Inst Energy Technol IFE Dept Hydrogen Technol POB 40 NO-2027 Kjeller Norway Univ Porto Inst Phys Adv Mat Nanotechnol & Nanophoton IFIMUP Dept Fis & Astron Fac Ciencias Rua Campo Alegre 687 P-4169007 Porto Portugal
A series of Mn1-xNi1-xfe2xSi0.95Al0.05 MM'X-type compounds (with x = 0.28, 0.3, 0.32 and 0.35) were investi-gated for their potential as magnetocaloric materials. Structural and magnetic properties were studied by... 详细信息
来源: 评论
The use of Mg2+ in investigations of the roles of intramitochondrial Ca2+ and the mitochondrial Ca2+-uniporter in the stimulation of oxidative phosphorylation
收藏 引用
JOURNAL Of BIOLOGICAL CHEMISTRY 2025年 第1期301卷 108046页
作者: Rendon, Dairo Alonso Univ Nacl Colombia Dept Fis Fac Ciencias Sede MedellinLab Biofis Medellin Colombia
来源: 评论
Comparative ultrastructure of trichomes on various organs of Rosa roxburghii
收藏 引用
MICROSCOPY RESEARCH AND TECHNIQUE 2021年 第9期84卷 2095-2103页
作者: Wang, Dao-Jing Lu, Min Ludlow, Richard A. Zeng, Jing-Wen Ma, Wen-Tao An, Hua-Ming Guizhou Univ Coll Agr Guiyang 550025 Peoples R China Guizhou Engn Res Ctr Fruit Crops Guiyang Peoples R China GuiYang Agr Test Ctr Guiyang Peoples R China Cardiff Univ Sch Biosci Sir Martin Evans BldgMuseum Ave Cardiff Wales
Chestnut rose, R. roxburghii Tratt. (Rosaceae) (RR) is an important crop in China due to its nutritional and medicinal values. RR frequently produces trichomes on the surfaces of a diverse range of organs, however a g... 详细信息
来源: 评论
Historical production and release inventory of PCDD/fs in China and projections upon policy options by 2025
收藏 引用
SCIENCE Of THE TOTAL ENVIRONMENT 2023年 876卷 162780页
作者: Gao, Ding Chen, Ziwei Zhang, Jianbo Xu, Weiguang Wen, Donghui Hu, Jianxin Peking Univ Coll Environm Sci & Engn Beijing 100871 Peoples R China
Using the source identification and classification methodology described in UNEP standardized toolkit for dioxin re-leases, combined with research data over the past decade, the production and release of polychlorinat... 详细信息
来源: 评论
Anorectal friction force Is Reduced in fecal Incontinence
收藏 引用
GASTRO HEP ADVANCES 2025年 第3期4卷 1-3页
作者: Gregersen, Hans Patel, Bhavesh Guo, Xiaomei Del Solar, Giuliana Barron Eisenstein, Samuel Kassab, Ghassan Calif Med Innovat Inst 11107 Roselle St San Diego CA 92121 USA Univ Calif San Diego Dept Surg San Diego CA USA
来源: 评论
THE RUDIN KEISLER ORDERING Of P -POINTS UNDER b = c
收藏 引用
JOURNAL Of SYMBOLIC LOGIC 2021年 第4期86卷 1691-1705页
作者: Starosolski, Andrzej Silesian Tech Univ Fac Appl Math PL-44100 Gliwice Poland
M. E. Rudin (1971) proved, under CH, that for each P-pointp there exists a P-point q strictly RK-greater than p. This result was proved under p = c by A. Blass (1973), who also showed that each RK-increasing co -seque... 详细信息
来源: 评论
Metrological assessment of DC current comparator resistance bridges
收藏 引用
MEASUREMENT 2023年 第1期215卷
作者: Marzano, M. Capra, P. P. Cassiago, C. D'Elia, V. Gasparotto, E. Callegaro, L. Nazl Ric Metrolog INRIM Str Cacce 91 I-10135 Turin Italy
Direct-current comparator bridges (DCC) are the working horses of primary resistance metrology in the intermediate resistance range. Having a ratio accuracy reaching 10-7 or better, they allow the realization of resis... 详细信息
来源: 评论