全文获取类型
收费全文 | 8715篇 |
免费 | 225篇 |
国内免费 | 40篇 |
专业分类
耳鼻咽喉 | 201篇 |
儿科学 | 746篇 |
妇产科学 | 416篇 |
基础医学 | 778篇 |
口腔科学 | 246篇 |
临床医学 | 703篇 |
内科学 | 1733篇 |
皮肤病学 | 407篇 |
神经病学 | 325篇 |
特种医学 | 188篇 |
外科学 | 1303篇 |
综合类 | 342篇 |
一般理论 | 6篇 |
预防医学 | 755篇 |
眼科学 | 173篇 |
药学 | 483篇 |
1篇 | |
中国医学 | 14篇 |
肿瘤学 | 160篇 |
出版年
2017年 | 52篇 |
2016年 | 38篇 |
2015年 | 63篇 |
2014年 | 70篇 |
2013年 | 109篇 |
2012年 | 151篇 |
2011年 | 167篇 |
2010年 | 139篇 |
2009年 | 170篇 |
2008年 | 106篇 |
2007年 | 100篇 |
2006年 | 124篇 |
2005年 | 81篇 |
2002年 | 42篇 |
2001年 | 58篇 |
1999年 | 69篇 |
1998年 | 156篇 |
1997年 | 191篇 |
1996年 | 207篇 |
1995年 | 159篇 |
1994年 | 161篇 |
1993年 | 162篇 |
1992年 | 96篇 |
1991年 | 103篇 |
1990年 | 101篇 |
1989年 | 118篇 |
1988年 | 93篇 |
1987年 | 100篇 |
1986年 | 93篇 |
1985年 | 64篇 |
1984年 | 67篇 |
1983年 | 55篇 |
1982年 | 52篇 |
1981年 | 63篇 |
1980年 | 44篇 |
1979年 | 39篇 |
1978年 | 37篇 |
1977年 | 45篇 |
1976年 | 43篇 |
1975年 | 37篇 |
1959年 | 343篇 |
1958年 | 760篇 |
1957年 | 870篇 |
1956年 | 774篇 |
1955年 | 804篇 |
1954年 | 782篇 |
1953年 | 40篇 |
1952年 | 35篇 |
1949年 | 182篇 |
1948年 | 127篇 |
排序方式: 共有8980条查询结果,搜索用时 15 毫秒
1.
Restriction fragment length polymorphism of human mitochondrial DNA in a sample population from Apulia (Southern Italy) 总被引:8,自引:1,他引:7
Restriction fragment length polymorphism (RFLP) of human mitochondrial DNA was analysed in a sample of 87 subjects from Apulia (South Italy) by the restriction enzymes Hpa I, Bam HI, Hae II, Msp I, Ava II, and Hinc II using total blood cell DNA probed by human mtDNA from placenta. Five BamHI morphs were observed, two of which are new ( Bam HI-4 and -5), as well as one new Ava II morph ( Ava II-28). The association Bam HI-4/ Ava II-28 enables us to demonstrate for the first time two polymorphic Bam HI sites present together in the same mtDNA molecule. In agreement with historical data the Apulian sample has been shown to be the most heterogeneous Italian population so far tested. 相似文献
2.
GIUSEPPE PERSEO MAURO GIGLI ROBERTO DE CASTIGLIONE 《Chemical biology & drug design》1987,29(4):478-485
The synthesis of TPH-13 (Glp-Glu-Lys-Pro-Tyr-Trp-Pro-Pro-Pro-Ile-Tyr-Pro-Met-OH), a tridecapeptide isolated from the skin of the South American frog Phyllomedusa rohdei, is described and alternative approaches are discussed. 相似文献
3.
Fatal and non-fatal stingray envenomation 总被引:2,自引:0,他引:2
A fatality occurred in a previously healthy 12-year-old boy after a penetrating chest injury from a stingray barb. The injury occurred under freak circumstances. Death was a result of cardiac tamponade which was secondary to venom-induced, localized myocardial necrosis and spontaneous perforation, six days after the direct penetration of the right ventricle by the barb. Three other cases of less serious stingray envenomation are described which illustrate the significant localized morbidity that may occur without immediate wound exploration and toilet after adequate anaesthesia. We also report a study of a series of 100 minor stingray envenomations which, when treated, resulted in no morbidity. It is possible that local infiltration with 1% plain lignocaine may have a direct counteraction against stingray venom that remains in the wound area. Stingray venom has insidious, but powerful, localized tissue necrosing properties in humans. 相似文献
4.
L. TIMMER-DE MIK M.D. D.M. BROEKHUIJSEN-VAN HENTEN M.D. † J.M. OLDHOFF M.D. PH.D. D.B. DE GEER M.D. ‡ V. SIGURDSSON M.D. PH.D. S.G.M.A. PASMANS M.D. PH.D. 《Pediatric dermatology》2009,26(3):358-360
Abstract: In Sweet's syndrome, the essential features are the characteristic morphology of the lesions, their histologic appearance, the dramatic response to corticosteroids and the absence of scarring. We report an 8-month-old infant in whom Sweet's syndrome was diagnosed and who developed acquired cutis laxa in the skin lesions. 相似文献
5.
6.
7.
8.
9.
10.