全文获取类型
收费全文 | 23065篇 |
免费 | 469篇 |
国内免费 | 39篇 |
专业分类
耳鼻咽喉 | 729篇 |
儿科学 | 508篇 |
妇产科学 | 2065篇 |
基础医学 | 3204篇 |
口腔科学 | 994篇 |
临床医学 | 762篇 |
内科学 | 3650篇 |
皮肤病学 | 779篇 |
神经病学 | 2100篇 |
特种医学 | 321篇 |
外科学 | 2342篇 |
综合类 | 86篇 |
一般理论 | 3篇 |
预防医学 | 1554篇 |
眼科学 | 1084篇 |
药学 | 2825篇 |
中国医学 | 32篇 |
肿瘤学 | 535篇 |
出版年
2021年 | 119篇 |
2019年 | 220篇 |
2018年 | 441篇 |
2017年 | 296篇 |
2016年 | 315篇 |
2015年 | 348篇 |
2014年 | 547篇 |
2013年 | 714篇 |
2012年 | 915篇 |
2011年 | 1041篇 |
2010年 | 531篇 |
2009年 | 255篇 |
2008年 | 634篇 |
2007年 | 808篇 |
2006年 | 909篇 |
2005年 | 823篇 |
2004年 | 925篇 |
2003年 | 924篇 |
2002年 | 773篇 |
2001年 | 681篇 |
2000年 | 671篇 |
1999年 | 549篇 |
1998年 | 148篇 |
1992年 | 363篇 |
1991年 | 309篇 |
1990年 | 346篇 |
1989年 | 395篇 |
1988年 | 455篇 |
1987年 | 441篇 |
1986年 | 443篇 |
1985年 | 421篇 |
1984年 | 338篇 |
1983年 | 252篇 |
1982年 | 106篇 |
1980年 | 100篇 |
1979年 | 515篇 |
1978年 | 310篇 |
1977年 | 249篇 |
1976年 | 242篇 |
1975年 | 336篇 |
1974年 | 505篇 |
1973年 | 505篇 |
1972年 | 421篇 |
1971年 | 397篇 |
1970年 | 385篇 |
1969年 | 409篇 |
1968年 | 351篇 |
1967年 | 268篇 |
1966年 | 291篇 |
1965年 | 175篇 |
排序方式: 共有10000条查询结果,搜索用时 13 毫秒
1.
Bień Agnieszka Rzońca Ewa Zarajczyk Marta Wilkosz Katarzyna Wdowiak Artur Iwanowicz-Palus Grażyna 《Quality of life research》2020,29(10):2669-2677
Quality of Life Research - The aim of the study was to assess QoL and identify and analyse its determinants in women with endometriosis. The study was performed in 2019 in health centres in Lublin... 相似文献
2.
3.
4.
Agata Cieślik-Bielecka Paweł Reichert Rafał Skowroński Tomasz Bielecki 《Platelets》2019,30(6):728-736
The current literature suggests that the antibacterial effect of leukocyte- and platelet-rich plasma (L-PRP) is directly related to platelet and leukocyte concentrations. The aim of this study was twofold: first, to evaluate the antimicrobial effect of L-PRP against selected bacterial strains in vitro, and second, to correlate this effect with leukocyte and platelet content in the final concentration. Blood was collected from 20 healthy males, and L-PRP, acellular plasma (AP), and autologous thrombin were consecutively prepared. Flow cytometry analysis of the blood, L-PRP, and AP was performed. The L-PRP gel, liquid L-PRP, and thrombin samples were tested in vitro for their antibacterial properties against seven selected bacterial strains using the Kirby–Bauer disk-diffusion method. There was notable antimicrobial activity against selected bacterial strains. No statistically significant correlations between antimicrobial activities and the platelet concentration in L-PRP were observed. Statistically significant positive correlations between selected leukocyte subtypes and antimicrobial activity were noted. A negative correlation was found between elevated monocyte count and antimicrobial activity of L-PRP against one bacterial strain studied. L-PRP possesses antimicrobial activity and can be potentially useful in the fight against certain postoperative infections. The bactericidal effect of L-PRP is caused by leukocytes, and there exists a relationship among selected leukocyte subtypes and L-PRP antimicrobial activity. 相似文献
5.
6.
7.
8.
9.
Micha? Panasiuk Marek Synder Maryla Drynkowska-Panasiuk Oktawiusz Bończak 《Chirurgia narzadów ruchu i ortopedia polska》2006,71(4):265-267
Serum levels of bone markers N-mid osteocalcin (OCN-Mid) and Cross-Laps in 20 patients (8 men and 12 women) with loosening of at least one element of total hip endoprosthesis confirmed during operation were compared with age and sex matched group with OA. Marker levels were measured by direct chemoluminescency using Modular E-170. Statistical analysis were done with t-Student test (alpha = 0.05). There were no significant differences in OCN-Mid, Cross-Laps levels and OCN-Mid/Cross-Laps ratio between both groups. Implant loosening is a slow process taking place on a relatively small surface in comparison to whole skeleton, so bone markers have no clinical value in diagnostics of total hip loosening. 相似文献
10.