全文获取类型
收费全文 | 922篇 |
免费 | 57篇 |
专业分类
耳鼻咽喉 | 25篇 |
儿科学 | 26篇 |
妇产科学 | 6篇 |
基础医学 | 92篇 |
口腔科学 | 9篇 |
临床医学 | 111篇 |
内科学 | 359篇 |
皮肤病学 | 10篇 |
神经病学 | 77篇 |
特种医学 | 14篇 |
外科学 | 58篇 |
综合类 | 22篇 |
一般理论 | 8篇 |
预防医学 | 75篇 |
眼科学 | 12篇 |
药学 | 37篇 |
中国医学 | 1篇 |
肿瘤学 | 37篇 |
出版年
2022年 | 8篇 |
2021年 | 25篇 |
2020年 | 16篇 |
2019年 | 20篇 |
2018年 | 13篇 |
2017年 | 8篇 |
2016年 | 14篇 |
2015年 | 18篇 |
2014年 | 16篇 |
2013年 | 30篇 |
2012年 | 51篇 |
2011年 | 57篇 |
2010年 | 41篇 |
2009年 | 20篇 |
2008年 | 56篇 |
2007年 | 45篇 |
2006年 | 53篇 |
2005年 | 46篇 |
2004年 | 36篇 |
2003年 | 36篇 |
2002年 | 32篇 |
2001年 | 33篇 |
2000年 | 44篇 |
1999年 | 35篇 |
1998年 | 19篇 |
1997年 | 10篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1992年 | 12篇 |
1991年 | 7篇 |
1990年 | 4篇 |
1989年 | 6篇 |
1987年 | 8篇 |
1986年 | 6篇 |
1985年 | 6篇 |
1983年 | 9篇 |
1981年 | 5篇 |
1978年 | 4篇 |
1976年 | 4篇 |
1975年 | 5篇 |
1974年 | 5篇 |
1970年 | 4篇 |
1969年 | 8篇 |
1941年 | 4篇 |
1938年 | 6篇 |
1936年 | 5篇 |
1935年 | 7篇 |
1934年 | 5篇 |
1933年 | 4篇 |
1927年 | 4篇 |
排序方式: 共有979条查询结果,搜索用时 15 毫秒
21.
Worm SW Kamara DA Reiss P Fontas E De Wit S El-Sadr W D'Arminio Monforte A Law M Phillips A Ryom L Dabis F Weber R Sabin C Lundgren JD;D:A:D Study Group 《The Journal of infectious diseases》2012,205(4):535-539
Concerns have arisen about possible effects of protease inhibitors (PIs) on cardiac conductivity. We found no significant association between current or recent PI exposure and sudden death or nonhemorrhagic stroke (adjusted rate ratio, 1.22; 95% confidence interval, .95-1.57), whereas cumulative exposure to PIs was associated with an increased risk (adjusted rate ratio, 1.06 per year of exposure; 95% confidence interval, 1.01-1.11). 相似文献
22.
23.
The muscle growth in mammals is regulated by several growth factors including myostatin (MSTN), a member of the transforming growth factor-beta (TGF-beta) superfamily. To date, it is unknown in fish whether MSTN could have any effect on proliferation or differentiation of myogenic cells. Using culture of trout satellite cells, we showed that mstn1a and mstn1b mRNA are expressed in myoblasts and that their expression decreased in differentiating myoblasts. We also demonstrated that a treatment with huMSTN decreased the proliferation of IGF1-stimulated myoblasts in a dose-dependent manner. By contrast, treatment of myoblasts with 100 nM of huMSTN for three days, did not affect the percentage of positive cells for myogenin neither the percentage of nuclei in myosin positive cells. Moreover, our results clearly indicated that huMSTN treatment had no effect on MyoD and myogenin protein levels, which suggests that huMSTN did not strongly affect MyoD activity. In conclusion, we showed that huMSTN inhibited proliferation but not differentiation of trout myoblasts, probably resulting from a lack of huMSTN effect on MyoD activity. Altogether, these results show high interspecies differences in the function of MSTN. 相似文献
24.
Costan G. Magnussen Juha Koskinen Markus Juonala Wei Chen Sathanur R. Srinivasan Matthew A. Sabin Russell Thomson Michael D. Schmidt Quoc Manh Nguyen Ji-Hua Xu Michael R. Skilton Mika Kähönen Tomi Laitinen Leena Taittonen Terho Lehtimäki Tapani Rönnemaa Jorma S.A. Viikari Gerald S. Berenson Olli T. Raitakari 《Journal of the American College of Cardiology》2012
25.
26.
27.
28.
Nicolas Salvadori Pierrick Adam Jean‐Yves Mary Luc Decker Lucie Sabin Sylvie Chevret Surachet Arunothong Woottichai Khamduang Prapan Luangsook Visitsak Suksa‐ardphasu Jullapong Achalapong Christine Rouzioux Wasna Sirirungsi Nicole Ngo‐Giang‐Huong Gonzague Jourdain 《Journal of the International AIDS Society》2020,23(4)
29.
Stringer CB Finlayson JC Barton RN Fernández-Jalvo Y Cáceres I Sabin RC Rhodes EJ Currant AP Rodríguez-Vidal J Giles-Pacheco F Riquelme-Cantal JA 《Proceedings of the National Academy of Sciences of the United States of America》2008,105(38):14319-14324
Two coastal sites in Gibraltar, Vanguard and Gorham's Caves, located at Governor's Beach on the eastern side of the Rock, are especially relevant to the study of Neanderthals. Vanguard Cave provides evidence of marine food supply (mollusks, seal, dolphin, and fish). Further evidence of marine mammal remains was also found in the occupation levels at Gorham's Cave associated with Upper Paleolithic and Mousterian technologies [Finlayson C, et al. (2006) Nature 443:850–853]. The stratigraphic sequence of Gibraltar sites allows us to compare behaviors and subsistence strategies of Neanderthals during the Middle Paleolithic observed at Vanguard and Gorham's Cave sites. This evidence suggests that such use of marine resources was not a rare behavior and represents focused visits to the coast and estuaries. 相似文献
30.