全文获取类型
收费全文 | 14711篇 |
免费 | 831篇 |
国内免费 | 56篇 |
专业分类
耳鼻咽喉 | 78篇 |
儿科学 | 452篇 |
妇产科学 | 237篇 |
基础医学 | 2351篇 |
口腔科学 | 521篇 |
临床医学 | 1464篇 |
内科学 | 2552篇 |
皮肤病学 | 151篇 |
神经病学 | 1217篇 |
特种医学 | 1097篇 |
外科学 | 2061篇 |
综合类 | 89篇 |
一般理论 | 1篇 |
预防医学 | 786篇 |
眼科学 | 164篇 |
药学 | 1139篇 |
中国医学 | 25篇 |
肿瘤学 | 1213篇 |
出版年
2022年 | 69篇 |
2021年 | 144篇 |
2020年 | 106篇 |
2019年 | 184篇 |
2018年 | 213篇 |
2017年 | 182篇 |
2016年 | 217篇 |
2015年 | 294篇 |
2014年 | 375篇 |
2013年 | 582篇 |
2012年 | 753篇 |
2011年 | 806篇 |
2010年 | 476篇 |
2009年 | 495篇 |
2008年 | 721篇 |
2007年 | 823篇 |
2006年 | 833篇 |
2005年 | 810篇 |
2004年 | 757篇 |
2003年 | 735篇 |
2002年 | 826篇 |
2001年 | 348篇 |
2000年 | 300篇 |
1999年 | 361篇 |
1998年 | 213篇 |
1997年 | 206篇 |
1996年 | 180篇 |
1995年 | 159篇 |
1994年 | 141篇 |
1993年 | 141篇 |
1992年 | 216篇 |
1991年 | 208篇 |
1990年 | 206篇 |
1989年 | 181篇 |
1988年 | 180篇 |
1987年 | 178篇 |
1986年 | 164篇 |
1985年 | 167篇 |
1984年 | 139篇 |
1983年 | 132篇 |
1982年 | 95篇 |
1981年 | 101篇 |
1980年 | 81篇 |
1979年 | 101篇 |
1978年 | 119篇 |
1977年 | 89篇 |
1976年 | 75篇 |
1975年 | 89篇 |
1974年 | 74篇 |
1971年 | 59篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Familial risk and heritability of intellectual disability: a population-based cohort study in Sweden
5.
6.
Rene S. Hendriksen Pimlapas Leekitcharoenphon Matthew Mikoleit Jacob Dyring Jensen Rolf Sommer Kaas Louise Roer Heena B. Joshi Srirat Pornruangmong Chaiwat Pulsrikarn Gladys D. Gonzalez-Aviles E. Ascelijn Reuland Nashwan Al Naiemi Astrid Louise Wester Frank M. Aarestrup Henrik Hasman 《Journal of clinical microbiology》2015,53(2):677-680
One unreported case of extended-spectrum-beta-lactamase (ESBL)-producing Salmonella enterica serovar Typhi was identified, whole-genome sequence typed, among other analyses, and compared to other available genomes of S. Typhi. The reported strain was similar to a previously published strain harboring blaSHV-12 from the Philippines and likely part of an undetected outbreak, the first of ESBL-producing S. Typhi. 相似文献
7.
8.
9.
Melissa Terpstra Ivan Tkác Raghavendra Rao Rolf Gruetter 《Magnetic resonance in medicine》2006,55(5):979-983
Both ultrashort echo-time STEAM and MEGA-PRESS-edited spectroscopy were used to validate noninvasive quantification of vitamin C (ascorbate) in the developing rat brain, where changes in ascorbate concentration have been reported. Despite strong overlap with resonances from glutamine, glutamate, glutathione, and macromolecules, reliable quantification of ascorbate (Cramer-Rao lower bounds<0.2 micromol/g) by LCModel analysis of STEAM (TE=2 ms) spectra was possible at 9.4 T. Ascorbate concentrations quantified from the STEAM spectra were in very good agreement with concentrations calculated from fully resolved ascorbate resonances in MEGA-PRESS-edited spectra measured from identical volumes of interest. Ascorbate concentrations measured using STEAM decreased with increasing postnatal rat age, in agreement with published brain ascorbate concentrations measured in vitro using high-performance liquid chromatography (HPLC). 相似文献
10.
Outcomes at 3 years of a prospective pilot study of Campath-1H and sirolimus immunosuppression for renal transplantation 总被引:2,自引:0,他引:2
Rolf N. Barth Christina A. Janus Christine A. Lillesand Nancy A. Radke John D. Pirsch Bryan N. Becker Luis A. Fernandez L. Thomas Chin Yolanda T. Becker Jon S. Odorico Anthony M. D''Alessandro Hans W. Sollinger Stuart J. Knechtle 《Transplant international》2006,19(11):885-892
Campath-1H (alemtuzumab) induction was used for renal transplantation in combination with sirolimus as immunosuppression. We previously reported a high (28%) rate of early rejection with this regimen, and now report 3-year outcomes. Twenty-nine patients were recipients of either deceased donor or non-HLA (Human Leukocyte Antigen) identical living donor primary renal allografts. Clinical parameters including infection, malignancy, kidney function, and kidney histology were followed prospectively for 3 years. Three-year cumulative graft and patient survival were 96% and 100%, respectively. Twenty patients were maintained on steroid-free immunosuppressive regimens, and 15 patients were maintained on monotherapy for immunosuppression (12 on sirolimus). No serious infectious complications were observed and two patients developed basal cell skin cancer. The 3-year results of our initial pilot study demonstrate good graft (96%) and patient (100%) outcomes. Campath-1H induction has yielded a high proportion of patients maintained on immunosuppressive monotherapy (57%) without serious infectious- and no malignancy-related complications. The reported regimen yielded novel insights into both Campath-1H and sirolimus therapy in renal transplantation. Because of the higher incidence of early rejection, we recommend a modified strategy of immunosuppression including a brief course of a calcineurin inhibitor. 相似文献