全文获取类型
收费全文 | 627000篇 |
免费 | 28641篇 |
国内免费 | 493篇 |
专业分类
耳鼻咽喉 | 7456篇 |
儿科学 | 20274篇 |
妇产科学 | 14022篇 |
基础医学 | 103002篇 |
口腔科学 | 12883篇 |
临床医学 | 54769篇 |
内科学 | 115524篇 |
皮肤病学 | 12334篇 |
神经病学 | 43856篇 |
特种医学 | 24315篇 |
外国民族医学 | 53篇 |
外科学 | 95506篇 |
综合类 | 8506篇 |
现状与发展 | 2篇 |
一般理论 | 107篇 |
预防医学 | 47624篇 |
眼科学 | 12934篇 |
药学 | 45985篇 |
2篇 | |
中国医学 | 1130篇 |
肿瘤学 | 35850篇 |
出版年
2019年 | 3898篇 |
2018年 | 16787篇 |
2017年 | 13237篇 |
2016年 | 15969篇 |
2015年 | 5738篇 |
2014年 | 7408篇 |
2013年 | 10772篇 |
2012年 | 18676篇 |
2011年 | 27205篇 |
2010年 | 17731篇 |
2009年 | 14780篇 |
2008年 | 26123篇 |
2007年 | 30338篇 |
2006年 | 17184篇 |
2005年 | 18152篇 |
2004年 | 18446篇 |
2003年 | 19250篇 |
2002年 | 17500篇 |
2001年 | 22745篇 |
2000年 | 23514篇 |
1999年 | 19133篇 |
1998年 | 5436篇 |
1997年 | 4634篇 |
1996年 | 4560篇 |
1995年 | 4290篇 |
1992年 | 14549篇 |
1991年 | 15968篇 |
1990年 | 16095篇 |
1989年 | 15751篇 |
1988年 | 14422篇 |
1987年 | 14332篇 |
1986年 | 13280篇 |
1985年 | 12798篇 |
1984年 | 9469篇 |
1983年 | 8069篇 |
1982年 | 4273篇 |
1979年 | 9041篇 |
1978年 | 6454篇 |
1977年 | 5168篇 |
1976年 | 5573篇 |
1975年 | 6615篇 |
1974年 | 7449篇 |
1973年 | 7168篇 |
1972年 | 6599篇 |
1971年 | 6309篇 |
1970年 | 5913篇 |
1969年 | 5506篇 |
1968年 | 5183篇 |
1967年 | 4621篇 |
1966年 | 3963篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
O. V. Pavlov S. A. Sel'kov A. V. Selyutin M. S. Shamugiya 《Bulletin of experimental biology and medicine》1998,125(5):514-517
Cells were isolated by successive dissociation of human placenta in dispase and collagenase solutions and separated by centrifugation
in Ficoll-Verografin gradient. Cell suspension was enriched with macrophages by adhesion to plastic followed by washing with
RPMI-1640. Isolated placental macrophages can be cultured for a long time. Cell culture homogeniety assessed by various methods
was equal or exceeded 95%.
Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 125, No. 5, pp. 579–582, May, 1998 相似文献
962.
963.
Patrick E. Barta Richard E. Powers Elizabeth H. Aylward Gary A. Chase Gordon J. Harris Peter V. Rabins Larry E. Tune Godfrey D. Pearlson 《Psychiatry Research: Neuroimaging》1997,68(2-3):65-75
Volumes of medial and lateral temporal lobe structures were assessed using magnetic resonance imaging (MRI) in 11 patients with late-life onset schizophrenia (LOS), 18 normal elderly controls and 12 patients with moderate cognitive impairment due to Alzheimer's disease (AD) who had no non-cognitive symptoms. While both patient groups has smaller volumes of several medial temporal regions (e.g. entorhinal cortex, left hippocampus), schizophrenics had significantly smaller anterior superior temporal gyri (STG) than normal controls, but AD patients did not. We have previously demonstrated anterior STG volume to be reduced in early life onset schizophrenia. 相似文献
964.
965.
Sofikitis N; Miyagawa I; Yamamoto Y; Loutradis D; Mantzavinos T; Tarlatzis V 《Human reproduction update》1998,4(3):197-212
This review refers to the evolution of ooplasmic injectionsof round spermatid nuclei ROSNI) or intact round spermatidsROSI). Conclusions from their preliminary application in thehamster, rabbit, mouse and human are discussed. Criteria foridentification of round spermatids and guidelines/quality controlfor application of ROSNI/ROSI techniques are emphasized. Althoughall the animal offspring and the human newborns delivered afterROSNI/ROSI are healthy additional research efforts are necessaryto confirm the safety of these procedures and improve theiroutcome 相似文献
966.
De Leo V; Morgante G; Lanzetta D; D'Antona D; Bertieri RS 《Human reproduction (Oxford, England)》1997,12(2):357-360
We report the results of administration of danazol after suspension of
gonadotrophin-releasing hormone analogue (GnRHa) therapy for uterine
myomas. A total of 21 women with uterine myomas was treated with 100 mg
danazol for 6 months after GnRHa therapy. Uterine volume and endocrine
status were monitored monthly by ultrasound and assay of plasma
gonadotrophins, oestradiol and progesterone. The results show a rebound of
uterine volume about 30% less than in controls at the end of danazol
therapy. Menstrual cyclicity returned after 65 +/- 3 days in 16 subjects
and five patients remained amenorrhoeic. Hormone assays confirmed renewed
ovarian function in the women whose menstrual periods returned. Bone
mineral content was substantially reduced during GnRHa treatment but
improved significantly during danazol therapy even in the women who
remained amenorrhoeic. These results show the utility of danazol in
prolonging the therapeutic effects of GnRHa. The mechanism by which danazol
inhibits rebound of uterine volume may be due to its antiprogesterone
effects on uterine myomas.
相似文献
967.
968.
G. Steiner 《Diabetologia》1997,40(2):S147-S148
969.
970.