全文获取类型
收费全文 | 4423篇 |
免费 | 334篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 53篇 |
儿科学 | 119篇 |
妇产科学 | 97篇 |
基础医学 | 591篇 |
口腔科学 | 128篇 |
临床医学 | 423篇 |
内科学 | 801篇 |
皮肤病学 | 83篇 |
神经病学 | 235篇 |
特种医学 | 186篇 |
外科学 | 873篇 |
综合类 | 94篇 |
一般理论 | 5篇 |
预防医学 | 328篇 |
眼科学 | 121篇 |
药学 | 297篇 |
中国医学 | 11篇 |
肿瘤学 | 334篇 |
出版年
2023年 | 24篇 |
2022年 | 19篇 |
2021年 | 114篇 |
2020年 | 92篇 |
2019年 | 134篇 |
2018年 | 137篇 |
2017年 | 102篇 |
2016年 | 93篇 |
2015年 | 130篇 |
2014年 | 161篇 |
2013年 | 245篇 |
2012年 | 309篇 |
2011年 | 326篇 |
2010年 | 225篇 |
2009年 | 168篇 |
2008年 | 249篇 |
2007年 | 271篇 |
2006年 | 261篇 |
2005年 | 252篇 |
2004年 | 247篇 |
2003年 | 234篇 |
2002年 | 170篇 |
2001年 | 58篇 |
2000年 | 63篇 |
1999年 | 63篇 |
1998年 | 34篇 |
1997年 | 22篇 |
1996年 | 13篇 |
1995年 | 27篇 |
1994年 | 22篇 |
1993年 | 25篇 |
1992年 | 23篇 |
1991年 | 42篇 |
1990年 | 18篇 |
1989年 | 27篇 |
1988年 | 26篇 |
1987年 | 20篇 |
1986年 | 24篇 |
1985年 | 24篇 |
1984年 | 29篇 |
1983年 | 24篇 |
1982年 | 13篇 |
1979年 | 14篇 |
1978年 | 11篇 |
1976年 | 14篇 |
1975年 | 14篇 |
1974年 | 11篇 |
1972年 | 11篇 |
1968年 | 23篇 |
1967年 | 12篇 |
排序方式: 共有4779条查询结果,搜索用时 31 毫秒
1.
Deitelzweig Steve Luo Xuemei Nguyen Jennifer L. Malhotra Deepa Emir Birol Russ Cristina Li Xiaoyan Lee Theodore C. Ferri Mauricio Wiederkehr Danny Reimbaeva Maya Barnes Geoffrey D. Piazza Gregory 《Journal of thrombosis and thrombolysis》2022,54(4):696-696
Journal of Thrombosis and Thrombolysis - 相似文献
2.
3.
In 2014, the Crimes (Mental Impairment and Unfitness to be Tried) Act 1997 in Victoria was extended to the Children’s Court of Victoria. This article describes the processes that preceded this change and the changes that occurred. The potential opportunities consequent to the changes are described, with their corresponding ethical implications. The decision not to resource some of the changes as recommended by the Victorian Law Reform Commission is described, with reference to the lack of establishment of an adolescent forensic mental health facility. The shortfalls currently occurring and their ethical implications are also discussed. We note the need for data regarding the number of children whose matters are being heard under the Crimes (Mental Impairment and Unfitness to be Tried) Act 1997, and the resourcing implications that flow from this. 相似文献
4.
5.
6.
7.
8.
Roberto V.P. Ribeiro Mitesh V. Badiwala Danny Ramzy Laura C. Tumiati Vivek Rao 《The Journal of thoracic and cardiovascular surgery》2019,157(2):615-625.e1
Objective
Hypertonic saline (HTS) has potent immune and vascular effects. We assessed recipient pretreatment with HTS on allograft function in a porcine model of heart transplantation and hypothesized that HTS infusion would limit endothelial and left ventricular (LV) dysfunction following transplantation.Methods
Heart transplants were performed after 6 hours of cold ischemic storage. Recipient pigs were randomized to treatment with or without HTS (7.5% NaCl) before cardiopulmonary bypass (CPB). Using a myograft apparatus, coronary artery endothelial-dependent (Edep) and -independent (Eind) relaxation was assessed. LV performance was determined using pressure-volume loop analysis. Pulmonary interleukin (IL)-2, IL-6, and tumor necrosis factor (TNF)-α expression was measured.Results
Weaning from CPB and LV performance after transplantation were improved in HTS-treated animals. Successful weaning from CPB was greater in the HTS-treated hearts (8 of 8 vs 2 of 8; P < .05). Mean LV functional recovery was improved in the HTS-treated animals, as assessed by preload recruitable stroke work (65 ± 10% vs 27 ± 10%; P < .001) and end-systolic elastance (55 ± 7% vs 37 ± 4%; P < .001). Treatment with HTS resulted in improved Edep (mean maximum elastance [Emax], 56 ± 5% vs 37 ± 7%; P < .001) and Eind (mean Emax%, 77 ± 6% vs 52 ± 4%; P < .001) vasorelaxation compared with control. Pulmonary expression of IL-2, IL-6, and TNF-α increased following transplantation, whereas HTS therapy attenuated IL production (P < .001). Transplantation increased plasma TNF-α levels and LV TNF-α expression, whereas HTS prevented this up-regulation (P < .001).Conclusions
Recipient HTS pretreatment preserves allograft vasomotor and LV function, and HTS therapy limits CPB-induced injury. HTS may be a novel recipient intervention to prevent graft dysfunction. 相似文献9.
Kevin Y. Zhan MD Sidharth V. Puram MD PhD Michael M. Li MD Dustin A. Silverman MD Amit A. Agrawal MD Enver Ozer MD Matthew O. Old MD Ricardo L. Carrau MD James W. Rocco MD PhD Kevin M. Higgins MD MSc Danny J. Enepekides MD MPH Zain Husain MD Stephen Y. Kang MD Antoine Eskander MD ScM 《Cancer》2020,126(6):1295-1305
10.
Sebastian P. Mondaca MD Dazhi Liu PharmD BCOP Jessica R. Flynn Sandy Badson Stefan Hamaway BS Mrinal M. Gounder MD Danny N. Khalil MD PhD Alexander E. Drilon MD Bob T. Li MD MPH Komal L. Jhaveri MD Alison M. Schram MD Katherine E. Kargus RN Mary Kate Kasler DNP MSN Natalie M. Blauvelt Neil H. Segal MD PhD Marinela Capanu PhD Margaret K. Callahan MD PhD David M. Hyman MD Maya Gambarin-Gelwan MD James J. Harding MD 《Cancer》2020,126(22):4967-4974