全文获取类型
收费全文 | 6697篇 |
免费 | 756篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 90篇 |
儿科学 | 206篇 |
妇产科学 | 172篇 |
基础医学 | 797篇 |
口腔科学 | 199篇 |
临床医学 | 628篇 |
内科学 | 1470篇 |
皮肤病学 | 201篇 |
神经病学 | 379篇 |
特种医学 | 326篇 |
外科学 | 1078篇 |
综合类 | 240篇 |
一般理论 | 4篇 |
预防医学 | 611篇 |
眼科学 | 152篇 |
药学 | 370篇 |
中国医学 | 3篇 |
肿瘤学 | 536篇 |
出版年
2021年 | 90篇 |
2019年 | 86篇 |
2018年 | 67篇 |
2017年 | 62篇 |
2016年 | 78篇 |
2015年 | 98篇 |
2014年 | 144篇 |
2013年 | 225篇 |
2012年 | 297篇 |
2011年 | 252篇 |
2010年 | 184篇 |
2009年 | 176篇 |
2008年 | 257篇 |
2007年 | 264篇 |
2006年 | 263篇 |
2005年 | 293篇 |
2004年 | 266篇 |
2003年 | 273篇 |
2002年 | 219篇 |
2001年 | 179篇 |
2000年 | 189篇 |
1999年 | 188篇 |
1998年 | 119篇 |
1997年 | 101篇 |
1996年 | 95篇 |
1995年 | 85篇 |
1994年 | 83篇 |
1993年 | 85篇 |
1992年 | 157篇 |
1991年 | 128篇 |
1990年 | 119篇 |
1989年 | 119篇 |
1988年 | 144篇 |
1987年 | 101篇 |
1986年 | 104篇 |
1985年 | 87篇 |
1984年 | 93篇 |
1983年 | 114篇 |
1982年 | 94篇 |
1981年 | 76篇 |
1980年 | 86篇 |
1979年 | 85篇 |
1978年 | 76篇 |
1977年 | 71篇 |
1976年 | 95篇 |
1975年 | 73篇 |
1974年 | 65篇 |
1973年 | 66篇 |
1971年 | 70篇 |
1970年 | 57篇 |
排序方式: 共有7462条查询结果,搜索用时 31 毫秒
991.
992.
D. Morton Boyette 《The Laryngoscope》1982,92(6):648-649
Delayed response in healing has been reported to be due to deficiencies in the trace mineral, zinc. Though trace elements are generally recognized as important in human nutrition, zinc is only recently receiving attention. The literature is scattered with many articles about zinc's use in trauma and inflammation. This paper is a review of some of the current knowledge of zinc and its use in trauma and inflammation. 相似文献
993.
Antibody microprobes were used to investigate the possible release of immunoreactive somatostatin (irSS) within the lumbar spinal cord of anaesthetized cats. A basal release of irSS was detected in the region of the substantia gelatinosa of the dorsal horn. By comparison with in vitro standards the concentration of SS detected in this region was estimated at 10(-7) M. This release of irSS was not significantly altered by electrical stimulation of large myelinated primary afferent fibres but was increased when unmyelinated afferents were additionally stimulated. Release of irSS was also detected at the spinal cord surface. The results support a role for somatostatin in nociceptive transmission in the spinal cord. 相似文献
994.
X-linked syndrome of platelet dysfunction, thrombocytopenia, and imbalanced globin chain synthesis with hemolysis 总被引:6,自引:5,他引:1
An unusual family is described with a congenital bleeding disorder present in four males belonging to three generations. Of the three surviving affected males, all had splenomegaly and petechiae. The three had moderate thrombocytopenia (55-90 X 10(9)/liter) and markedly prolonged Ivy-template bleeding times (greater than 30 min). They were also noted to have reticulocytosis and, upon further investigation, imbalanced globin chain synthesis resembling that of beta-thalassemia minor. Studies on nine additional family members in four generations were normal except for slight elevations of reticulocyte counts in female members, one of whom had the abnormal globin chain synthesis ratio. In male members, the bleeding tendency and clinical signs always occurred in the presence of the globin chain synthesis defect and reticulocytosis. This previously undescribed condition was apparently transmitted as an X-linked disorder. 相似文献
995.
996.
997.
998.
999.
1000.
A 45-year-old man developed, apparently simultaneously, two rare conditions, xanthomatosis (with hypercholesterolemia) and myelomatosis. His blood contained very high levels of cholesterol, the major part of which was present in a markedly elevated beta-lipoprotein fraction. Studies carried out over a period of six years, utilizing electrophoresis, ultracentrifugation, determinations of chemical composition and incorporation with C14-labelled glutamic acid and acetate, indicated a direct association between the two conditions, the myeloma lipoprotein apparently being produced by the abnormal plasma cells in the bone marrow. There were definite indications that the low density Sf 0-12 lipoproteins were primarily involved. 相似文献