首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1477篇
  免费   97篇
  国内免费   5篇
耳鼻咽喉   3篇
儿科学   24篇
妇产科学   28篇
基础医学   130篇
口腔科学   27篇
临床医学   307篇
内科学   382篇
皮肤病学   8篇
神经病学   126篇
特种医学   20篇
外科学   137篇
综合类   13篇
一般理论   1篇
预防医学   185篇
眼科学   8篇
药学   67篇
中国医学   1篇
肿瘤学   112篇
  2024年   3篇
  2023年   16篇
  2022年   11篇
  2021年   30篇
  2020年   20篇
  2019年   29篇
  2018年   34篇
  2017年   30篇
  2016年   27篇
  2015年   36篇
  2014年   43篇
  2013年   73篇
  2012年   123篇
  2011年   94篇
  2010年   51篇
  2009年   61篇
  2008年   99篇
  2007年   98篇
  2006年   96篇
  2005年   114篇
  2004年   116篇
  2003年   89篇
  2002年   105篇
  2001年   15篇
  2000年   7篇
  1999年   17篇
  1998年   10篇
  1997年   11篇
  1996年   14篇
  1995年   6篇
  1994年   5篇
  1993年   11篇
  1992年   5篇
  1991年   6篇
  1990年   7篇
  1989年   5篇
  1988年   3篇
  1987年   3篇
  1985年   4篇
  1983年   2篇
  1982年   5篇
  1981年   2篇
  1980年   4篇
  1979年   4篇
  1978年   4篇
  1977年   4篇
  1976年   7篇
  1975年   6篇
  1974年   3篇
  1957年   2篇
排序方式: 共有1579条查询结果,搜索用时 46 毫秒
1.
2.
Women and children bear the greatest burden in the midst of war and long‐term disasters. Complex humanitarian emergencies are characterized by social disruption, armed conflict, population displacement, collapse of public health infrastructure, and food shortages. Humanitarian assistance for refugees and internally displaced populations requires particular attention to the common issues affecting morbidity and mortality in women and infants. Gender‐based violence and reproductive health concerns are discussed within the context of populations affected by conflict and forced migration. Recommendations for midwives and women's health care providers engaging in care for women and children in complex humanitarian emergencies are discussed.  相似文献   
3.
4.
5.
6.
ABSTRACT: Background: Increasingly, women seek involvement in decisions about their health care. The purpose of this study was to examine women's experience of, and satisfaction with, their involvement in health care decisions during a high‐risk pregnancy. Methods: Forty‐seven women with hypertension or threatened preterm delivery (including multiple births) were interviewed after the birth of their child. They received prenatal care at home from nurses in a community program or were hospitalized. The in‐depth interviews were audiotaped and transcribed; data were analyzed using constant comparative methods. Results: Women identified an increased feeling of responsibility for the health of their baby and themselves, but differed in choosing active or passive involvement in health care decisions. Women who wanted active involvement achieved it through one of three processes: struggling for, negotiating, or being encouraged. Women who wanted passive involvement and women facing health crises used the process of trusting in the expertise of nurses and physicians. Women were satisfied if the care from health care professionals was congruent with how they wanted to be involved in decision‐making. Conclusions: Although most women want to be actively involved in health decision‐making during a high‐risk pregnancy, some prefer a passive role. The setting of prenatal care, community‐based or in‐hospital, was less important than the ability of nurses and physicians to support the woman in her preferred role in decision‐making. (BIRTH 30:2 June 2003)  相似文献   
7.
This study is based on the hypothesis of a paraventricular cerebral noradrenaline deficit in alcoholic Korsakoff's syndrome. In a randomized open study the effects of a 4-week treatment with the selective noradrenaline reuptake inhibitor reboxetine on (1) the salivary concentration of the noradrenaline metabolite MHPG and (2) changes in cognitive performance measured by the Mini Mental Status Test were examined. The study group consisted of 105 patients diagnosed with alcohol-related Korsakoff's syndrome (ICD-10: F10.6). Korsakoff's patients showed a reduced concentration of salivary MHPG compared to healthy controls; this reduction did not correlate with the results of the Mini Mental Status Test. An increase in salivary MHPG was found together with an improvement in the Mini Mental Status Test both in the verum group treated with reboxetine and in the control group upon completion of the 4-week study. However, a subgroup with a shorter duration of disease (<1 year) was found to profit significantly from reboxetine treatment, as shown by improvements in cognitive performance.  相似文献   
8.
Allison GE  Angeles DC  Huan Pt  Verma NK 《Virology》2003,308(1):114-127
The entire genome of SfV, a temperate serotype-converting bacteriophage of Shigella flexneri, has recently been sequenced (Allison, G.E., Angeles, D., Tran-Dinh, N., Verma, N.K. 2002, J. Bacteriol. 184, 1974-1987). Based on the sequence analysis, we further characterised the SfV virion structure and morphogenesis. Electron microscopy indicated that SfV belongs to the Myoviridae morphology family. Analysis of the proteins encoded by orf1, orf2, and orf3 revealed that they were homologous to small and large terminase subunits, and portal proteins, respectively; the protein encoded by orf5 showed homology to capsid proteins. Western immunoblot of the phage with anti-SfV sera revealed two antigenic proteins, and the N-terminal amino acid sequence of the 32-kDa protein corresponded to amino acids 116 to 125 of the ORF5 protein, suggesting that the capsid may be processed. Functional analysis of orf4 showed that it encodes the phage capsid protease. The proteins encoded by orfs1, 2, 3, 4, and 5 are homologous to similar proteins in the Siphoviridae phage family of both gram-positive and gram-negative origin. The capsid and morphogenesis genes are upstream and adjacent to the genes encoding Myoviridae (Mu-like) tail proteins. The organisation of the structural genes of SfV is therefore unique as the head and tail genes originate from different morphology groups.  相似文献   
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号