全文获取类型
收费全文 | 707709篇 |
免费 | 49575篇 |
国内免费 | 1234篇 |
学科分类
医药卫生 | 758518篇 |
出版年
2019年 | 5359篇 |
2018年 | 7779篇 |
2017年 | 6080篇 |
2016年 | 6840篇 |
2015年 | 7576篇 |
2014年 | 10345篇 |
2013年 | 15488篇 |
2012年 | 20755篇 |
2011年 | 21759篇 |
2010年 | 12880篇 |
2009年 | 12051篇 |
2008年 | 20258篇 |
2007年 | 21852篇 |
2006年 | 22219篇 |
2005年 | 20781篇 |
2004年 | 20362篇 |
2003年 | 19315篇 |
2002年 | 18868篇 |
2001年 | 36623篇 |
2000年 | 37170篇 |
1999年 | 30519篇 |
1998年 | 7651篇 |
1997年 | 6389篇 |
1996年 | 6662篇 |
1995年 | 6696篇 |
1994年 | 6144篇 |
1993年 | 5640篇 |
1992年 | 23229篇 |
1991年 | 23131篇 |
1990年 | 22499篇 |
1989年 | 22320篇 |
1988年 | 20215篇 |
1987年 | 19621篇 |
1986年 | 18634篇 |
1985年 | 17436篇 |
1984年 | 12786篇 |
1983年 | 10806篇 |
1982年 | 5949篇 |
1979年 | 11564篇 |
1978年 | 8159篇 |
1977年 | 6854篇 |
1976年 | 6597篇 |
1975年 | 7259篇 |
1974年 | 8486篇 |
1973年 | 8123篇 |
1972年 | 7651篇 |
1971年 | 7126篇 |
1970年 | 6877篇 |
1969年 | 6305篇 |
1968年 | 5786篇 |
排序方式: 共有10000条查询结果,搜索用时 21 毫秒
1.
2.
Perkins Jessica M. Kakuhikire Bernard Baguma Charles Rasmussen Justin D. Satinsky Emily N. Kiconco Allen Kananura Justus Audet Carolyn M. Siedner Mark J. Haberer Jessica E. Bangsberg David R. Tsai Alexander C. 《AIDS and behavior》2022,26(6):1892-1904
AIDS and Behavior - Although misperceived norms often drive personal health behaviors, we do not know about this phenomenon in the context of antiretroviral therapy (ART) adherence. We conducted a... 相似文献
3.
Spindler L. Alam A. Fathallah N. Rentien A.-L. Draullette M. Pommaret E. Thierry M.-L. Mituialy A. El Abbes L. Aubert M. Benfredj P. Far E. Safa Beaussier H. de Parades V. 《Techniques in coloproctology》2022,26(2):143-146
Techniques in Coloproctology - The aim of our study was to assess the efficacy of sinus laser therapy (SiLaT) for the treatment of pilonidal disease. All adult patients treated with SiLaT in our... 相似文献
4.
Azuma Yuka Dohi Osamu Naito Yuji Yasuda Takeshi Yoshida Takuma Ishida Tsugitaka Kitae Hiroaki Matsumura Shinya Doi Toshihumi Hirose Ryohei Inoue Ken Yoshida Naohisa Kamada Kazuhiro Uchiyama Kazuhiko Takagi Tomohisa Ishikawa Takeshi Konishi Hideyuki Nishimura Ayako Kishimoto Mitsuo Itoh Yoshito 《Esophagus》2022,19(2):278-286
Esophagus - This study aimed to evaluate endoscopic findings using non-magnifying blue laser imaging (BLI) to determine the risk factors for metachronous esophageal squamous cell carcinoma (ESCC).... 相似文献
5.
Marco N. Iannone Stefano Stucchi Elia A. Turolla Chiara Beretta Samuele Ciceri Clizia Chinello Lisa Pagani Sergio Todde Patrizia Ferraboschi 《Journal of labelled compounds & radiopharmaceuticals》2022,65(3):48-62
In the last decade, the development of new radiopharmaceuticals for the imaging and therapy of prostate cancer has been a highly active and important area of research, especially focusing on the prostate-specific membrane antigen (PSMA), an antigen which is upregulated in prostate, as well as in other tumor cells. A large variety of PSMA ligands have been radiolabeled, to date. Among the various derivatives, PSMA-617 resulted to be one of the most interesting in terms of interaction with the antigen and clinical properties, and its lutetium-177 labeled version has recently been approved by regulatory agencies for therapeutic purposes. For this reasons, the radiolabeling with fluorine-18 of a PSMA-617 derivative might be of interest. Beside other methodologies to radiolabel macromolecules with fluorine-18, the “click-chemistry” approach resulted to be very useful, and the copper-catalyzed azide-alkyne cycloaddition (CuAAC) is considered one of most efficient and reliable. This paper proposes the synthesis of a suitable precursor for the radiolabeling with fluorine-18 of a new PSMA-617 derivative. The whole radiosynthetic procedure has been fully automated, and the final product, which proved to be stable in plasma, has been obtained with radiochemical yield and purity suitable for subsequent preclinical studies. 相似文献
6.
7.
8.
Alzina Koric MPP Chun-Pin Chang PhD Bayarmaa Mark MS Kerry Rowe PhD John Snyder PhD Mark Dodson MD Vikrant G. Deshmukh PhD Michael G. Newman MS Alison M. Fraser MPH Ken R. Smith PhD Ankita P. Date MS Lisa H. Gren PhD Christina A. Porucznik PhD Benjamin A. Haaland PhD N. Lynn Henry MD Mia Hashibe PhD 《Cancer》2022,128(14):2826-2835
9.
Clinical Oral Investigations - To evaluate the effect of membrane occlusiveness and experimental diabetes on early and late healing following guided bone regeneration. A total of 30 Wistar rats... 相似文献
10.
Zrubka Zsombor Vékás Péter Németh Péter Dobos Ágota Hajdu Ottó Kovács Levente Gulácsi László Hibbard Judith Péntek Márta 《The European journal of health economics》2022,23(8):1341-1355
The European Journal of Health Economics - Patient activation comprises the skills, knowledge and motivation necessary for patients’ effective contribution to their care. We adapted and... 相似文献