全文获取类型
收费全文 | 3666篇 |
免费 | 168篇 |
国内免费 | 47篇 |
专业分类
耳鼻咽喉 | 34篇 |
儿科学 | 114篇 |
妇产科学 | 97篇 |
基础医学 | 624篇 |
口腔科学 | 62篇 |
临床医学 | 478篇 |
内科学 | 558篇 |
皮肤病学 | 78篇 |
神经病学 | 96篇 |
特种医学 | 357篇 |
外科学 | 487篇 |
综合类 | 205篇 |
预防医学 | 199篇 |
眼科学 | 31篇 |
药学 | 280篇 |
2篇 | |
中国医学 | 36篇 |
肿瘤学 | 143篇 |
出版年
2022年 | 45篇 |
2021年 | 42篇 |
2020年 | 39篇 |
2018年 | 31篇 |
2015年 | 45篇 |
2014年 | 64篇 |
2013年 | 91篇 |
2012年 | 95篇 |
2011年 | 109篇 |
2010年 | 102篇 |
2009年 | 115篇 |
2008年 | 105篇 |
2007年 | 99篇 |
2006年 | 123篇 |
2005年 | 86篇 |
2004年 | 76篇 |
2003年 | 81篇 |
2002年 | 87篇 |
2001年 | 67篇 |
2000年 | 72篇 |
1999年 | 56篇 |
1998年 | 92篇 |
1997年 | 87篇 |
1996年 | 88篇 |
1995年 | 79篇 |
1994年 | 52篇 |
1993年 | 68篇 |
1992年 | 56篇 |
1991年 | 93篇 |
1990年 | 100篇 |
1989年 | 102篇 |
1988年 | 112篇 |
1987年 | 101篇 |
1986年 | 97篇 |
1985年 | 88篇 |
1984年 | 53篇 |
1983年 | 55篇 |
1982年 | 32篇 |
1979年 | 42篇 |
1978年 | 46篇 |
1977年 | 40篇 |
1976年 | 41篇 |
1975年 | 34篇 |
1973年 | 39篇 |
1972年 | 44篇 |
1971年 | 34篇 |
1958年 | 32篇 |
1956年 | 31篇 |
1955年 | 42篇 |
1954年 | 35篇 |
排序方式: 共有3881条查询结果,搜索用时 0 毫秒
11.
I. V. Smirnov A. A. Khachatur'yan 《Bulletin of experimental biology and medicine》1991,112(5):1601-1603
All-Union Hematology Research Center, Moscow. (Presented by Academician of the Academy of Medical Sciences of the USSR A. I. Vorob'ev.) Translated from Byulleten' Éksperimental'noi Biologii i Meditsiny, Vol. 112, No. 11, pp. 500–501, November, 1991. 相似文献
12.
A study of 30 patients with infectious-allergic myocarditis, accompanied with chronic heart failure made use of echocardiography, hemodynamic assessment by cardiac catheterization, endomyocardial biopsy. A relationship is demonstrated between hemodynamic changes and the lesion of cellular ultrastructural apparatus, mitochondria, in particular. Patients with first-stage heart failure associated with infectious-allergic myocarditis showed incomplete diastole, while systolic changes were found in patients with severe manifestation of circulatory insufficiency. 相似文献
13.
DA Taylor 《Environmental health perspectives》2002,110(9):A512-A513
14.
L S Lozovskaia I K Lavrova S D Svetlyshev R G Desiatskova V V Smirnov 《Voprosy virusologii》1983,28(4):103-108
Serological studies were carried out in the time course of insulin-dependent diabetes mellitus in 419 children, among whom paired sera from 66 were studied in the very beginning of diabetes mellitus. By seroconversion in 83% of the children early in the disease, different, frequently mixed virus infections were diagnosed: Coxsackie B2, B3, B4 (46%), rubella (41%), influenza A, B, C (38%), parainfluenza types 1-3 (35%), mumps (23%), adenovirus infection (18%), HB virus infection (4.5%). Acute respiratory diseases preceded or coincided with the onset of diabetes in half of the children with diagnosed acute respiratory and enterovirus infections. No clinical signs of rubella, mumps, or hepatitis immediately before the onset of diabetes or early in the disease were found. A possible role of virus infection diagnosed early in diabetes, in the etiology of chronic insulitis, in provocation of its exacerbation, and manifestation of diabetes mellitus is discussed. 相似文献
15.
V L Motin M S Pokrovskaya M V Telepnev V V Kutyrev N A Vidyaeva A A Filippov G B Smirnov 《Microbial pathogenesis》1992,12(3):165-175
We have sequenced the lcrGVH operon from Y. pseudotuberculosis plasmid pYV995 and compared its sequence with that of Y. pestis. The sequences were highly homological, however, six base pair substitutions were found in one short 14 bp region termed variable sequence. Two oligonucleotides corresponding to variable sequence of Y. pestis (pes-V) or Y. pseudotuberculosis (ptb-V) were synthesized and were used as molecular probes in hybridization experiments with sets of Y. pestis and Y. pseudotuberculosis strains. All 17 Y. pestis strains tested were positive only with the pes-V probe, 18 of 21 Y. pseudotuberculosis strains were positive with the ptb-V probe, while three Y. pseudotuberculosis strains reacted with the pes-V probe but not the ptb-V probe. The 200 bp fragment including variable sequence was sequenced in seven Y. pseudotuberculosis strains. The Y. pseudotuberculosis strains which were positive with the pes-V probe possessed the 200 bp fragment sequence almost identical with that from Y. pestis. No correlation between the Y. pestis-like lcrV sequence and virulence was found for these strains. Moreover, the Y. pseudotuberculosis strains with Y. pestis-like sequences in contrast to Y. pestis possessed unaltered yadA gene. However, we have found the yadA frameshift mutation characteristic for Y. pestis in one Y. pseudotuberculosis strain 312. 相似文献
16.
17.
18.
19.
20.
V V Iasnetsov V A Pravdivtsev A V Shashkov L D Smirnov V V Iasnetsov S B Kozlov Iu V Ivanov 《Aviakosmicheskaia i ekologicheskaia meditsina》2005,39(4):45-50
Experiments with rats showed that three out of 12 3-hydroxypyridine derivatives (ethyl-methyl hyd- roxypyrine succinate, SK-132 and IBCP-2 - had an anti-motion sickness effect stronger than of scopolamine, the reference vestiboloprotector. The anti-motion sickness effect of ethyl-methyl hydroxypyrine was also demonstrated in experiments with cats. Apparent anti-motion sickness effect of ethyl-methyl hydroxypyrine (mexydol) was found in 69% of healthy male volunteers which is comparable with the effect of scopolamine (62%). In experiments with immobilized cats (myorelaxation drugs) the microelectrode technique and microontoiphoresis of physiologically active substances revealed that ethylmethyl hydroxypyrine influences the majority of neurons in the medial vestibular nucleus (61%). Suppression of cell spontaneous activities in more than one half of cases can be stopped completely or attenuated significantly by bicucculine, a specific GABA(A)-receptor antagonist. In 42% of neurons ethyl-methyl hydroxypyrine subdues the response to vestibular stimulation which is likely to underlie the anti-motion sickness effect. 相似文献