全文获取类型
收费全文 | 9200篇 |
免费 | 577篇 |
国内免费 | 87篇 |
专业分类
耳鼻咽喉 | 160篇 |
儿科学 | 447篇 |
妇产科学 | 217篇 |
基础医学 | 1204篇 |
口腔科学 | 428篇 |
临床医学 | 719篇 |
内科学 | 2153篇 |
皮肤病学 | 247篇 |
神经病学 | 595篇 |
特种医学 | 607篇 |
外科学 | 1112篇 |
综合类 | 83篇 |
预防医学 | 800篇 |
眼科学 | 112篇 |
药学 | 509篇 |
2篇 | |
中国医学 | 43篇 |
肿瘤学 | 426篇 |
出版年
2023年 | 64篇 |
2022年 | 116篇 |
2021年 | 250篇 |
2020年 | 135篇 |
2019年 | 220篇 |
2018年 | 304篇 |
2017年 | 208篇 |
2016年 | 194篇 |
2015年 | 228篇 |
2014年 | 304篇 |
2013年 | 381篇 |
2012年 | 482篇 |
2011年 | 530篇 |
2010年 | 418篇 |
2009年 | 329篇 |
2008年 | 441篇 |
2007年 | 465篇 |
2006年 | 400篇 |
2005年 | 413篇 |
2004年 | 356篇 |
2003年 | 304篇 |
2002年 | 277篇 |
2001年 | 220篇 |
2000年 | 247篇 |
1999年 | 213篇 |
1998年 | 195篇 |
1997年 | 197篇 |
1996年 | 167篇 |
1995年 | 148篇 |
1994年 | 156篇 |
1993年 | 136篇 |
1992年 | 119篇 |
1991年 | 97篇 |
1990年 | 107篇 |
1989年 | 126篇 |
1988年 | 103篇 |
1987年 | 97篇 |
1986年 | 91篇 |
1985年 | 87篇 |
1984年 | 58篇 |
1983年 | 40篇 |
1982年 | 35篇 |
1981年 | 33篇 |
1980年 | 33篇 |
1979年 | 26篇 |
1978年 | 25篇 |
1977年 | 30篇 |
1976年 | 46篇 |
1975年 | 35篇 |
1973年 | 23篇 |
排序方式: 共有9864条查询结果,搜索用时 0 毫秒
11.
A Rangel-Abundis R Olvera J Cordero E Cordero M A Ramos 《Gaceta médica de México》1991,127(3):253-256
The authors present the clinical case of a 31 year female with systemic vascular hypertension secondary to a 65 percent unilateral fibromuscular renal artery stenosis. The centellographic study demonstrated hypoperfusion on the right kidney and serious functional damage; the patient was subject to intraluminal renal angioplasty resulting in right renal arterial thrombosis, which was treated successfully with intra-arterial and intravenous streptokinase infusion. Following the thrombotic therapy, recanalization of the thrombosed artery and normal renal excretion of the contrast substance was observed. 相似文献
12.
A series of intradiscal injections of chondroitinase ABC was performed in 31 young adult rabbits. Roentgenograms were taken immediately postinjection and were repeated at two, three, five, six, seven, or nine days after injection. All had roentgenographic evidence of disc space narrowing at all stages after the injection. Histologic evaluation of safranin-O fast green-stained sections indicated degradation of proteoglycans in the annulus fibrosus of chondroitinase ABC-injected discs. The cells of the chondroitinase ABC-injected discs, the end plates, and the growth-plate areas of adjacent vertebral bodies appeared unaffected. 相似文献
13.
We describe a case of a traumatic aneurysm of the cavernous portion of the internal carotid artery in a patient who had had craniofacial trauma 12 years before. MR and CT revealed a mass in the sphenoid sinus thought to be unrelated to the patient''s symptoms. Carotid angiography gave the correct diagnosis. 相似文献
14.
15.
16.
C.K. Biswas J.M. Ramos D.N.S. Kerr 《Clinica chimica acta; international journal of clinical chemistry》1981,116(3):343-347
The effect of heparin on plasma ionised calcium was studied by adding it in increasing amounts to whole blood from 10 normal subjects. There was no significant change in ionised calcium from the addition of 1 U/ml but a significant fall of 0.02 mmol/1 when 2 U/ml were added and a progressive further fall with increasing concentrations. Heparin from three different manufacturers produced similar results. The effect of heparinisation in vivo was studied during regular haemodialysis on 10 patients with chronic renal failure. Following intravenous injection of 10000 U of heparin there was a consistent and significant fall averaging 0.03 mmol/l. 相似文献
17.
18.
19.
M de la Hera A de la Hera A Ramos L Buelta J L Alonso V Rodriguez-Valverde J Merino 《International immunology》1992,4(1):67-74
BALB/c mice injected at birth with 10(8) semi-allogeneic (C57BL/6 x BALB.IgHb)F1 spleen cells develop a lupus-like syndrome in which autoantibodies bear exclusively the donor allotype. We have analyzed the evolution of donor B cell chimerism and the autoimmune manifestations during the first year of life in these mice. Anti-DNA, -histone, and -cardiolipin IgG antibodies as well as circulating immune complexes appeared in the second week of life, reached the highest values around the sixth week, and then progressively dropped to normal values after the sixth month in most mice. The kinetics of the evolution of the autoimmune manifestations, as well as the kinetics of serum donor Ig allotype, were parallel to the kinetics of donor B cell chimerism, which was particularly prominent in the spleens in early weeks of life, and progressively decreased after remission of the autoimmune syndrome. Membrane-proliferative glomerulonephritis, which was followed as the more representative histological abnormality in this model, was particularly evident after 10 weeks of life, but disappeared by the end of the follow-up. Interestingly, when mice with a self-limited disease were re-injected with 10(8) F1 spleen cells i.v., a flare in the serological manifestations was observed. In these re-injected mice a predominance of anti-DNA, IgG1 antibodies bearing exclusively the donor allotype was also observed, as in the early weeks of life.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
20.
E. J. Ramos H. S. Pollinger M. D. Stegall J. M. Gloor A. Dogan J. P. Grande 《American journal of transplantation》2007,7(2):402-407
Rituximab, intravenous immunoglobulin (IVIG) and rabbit antithymocyte globulin (rATG) all have been suggested to have an effect on antibody producing cells, however, supporting data are lacking. To assess the impact of these agents on splenic B‐cell populations in vivo, we retrospectively examined 25 spleens removed from patients treated with these agents as part of desensitization protocols in either ABO incompatible or positive crossmatch living donor kidney transplantation. These were compared to control (CTL) spleens removed for trauma. CTLs and spleens removed at transplant after multiple pretransplant plasmaphereses (PP) plus low‐dose IVIG showed similar large numbers of naïve B cells (CD20+ and CD79+), plasma cells (CD138+) and memory B cells (CD27+ cells). Adding rituximab to this PP/IVIG regimen reduced the number naïve B cells, but had no effect on memory or plasma cells. Combination treatment (PP/IVIG, rituximab and rATG) showed a trend toward the reduction of CD27+ cells, but again plasma cells were unchanged. We conclude that none of these protocols reduces splenic plasma cells in vivo. PP/low‐dose IVIG does not alter splenic B cells, but the addition of rituximab decreases mature B cells. Memory B cells may be affected by combination therapy including rATG and requires further study. 相似文献