全文获取类型
收费全文 | 1870篇 |
免费 | 189篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 30篇 |
妇产科学 | 31篇 |
基础医学 | 276篇 |
口腔科学 | 36篇 |
临床医学 | 198篇 |
内科学 | 333篇 |
皮肤病学 | 27篇 |
神经病学 | 199篇 |
特种医学 | 291篇 |
外科学 | 307篇 |
综合类 | 14篇 |
预防医学 | 95篇 |
眼科学 | 20篇 |
药学 | 98篇 |
肿瘤学 | 102篇 |
出版年
2023年 | 16篇 |
2021年 | 23篇 |
2020年 | 11篇 |
2019年 | 20篇 |
2018年 | 47篇 |
2017年 | 33篇 |
2016年 | 39篇 |
2015年 | 50篇 |
2014年 | 76篇 |
2013年 | 91篇 |
2012年 | 64篇 |
2011年 | 87篇 |
2010年 | 83篇 |
2009年 | 72篇 |
2008年 | 79篇 |
2007年 | 96篇 |
2006年 | 53篇 |
2005年 | 59篇 |
2004年 | 72篇 |
2003年 | 55篇 |
2002年 | 59篇 |
2001年 | 67篇 |
2000年 | 47篇 |
1999年 | 55篇 |
1998年 | 42篇 |
1997年 | 35篇 |
1996年 | 27篇 |
1995年 | 25篇 |
1994年 | 29篇 |
1993年 | 22篇 |
1992年 | 30篇 |
1991年 | 29篇 |
1990年 | 28篇 |
1989年 | 52篇 |
1988年 | 38篇 |
1987年 | 34篇 |
1986年 | 24篇 |
1985年 | 32篇 |
1984年 | 14篇 |
1983年 | 10篇 |
1982年 | 15篇 |
1981年 | 12篇 |
1980年 | 15篇 |
1979年 | 19篇 |
1978年 | 13篇 |
1977年 | 12篇 |
1976年 | 17篇 |
1975年 | 15篇 |
1972年 | 10篇 |
1969年 | 10篇 |
排序方式: 共有2065条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
Early nerve regeneration after Achilles tendon rupture — a prerequisite for healing? A study in the rat 总被引:4,自引:0,他引:4
Paul W Ackermann Mahmood Ahmed Andris Kreicbergs 《Journal of orthopaedic research》2002,20(4):849-856
Nerve regeneration during healing of Achilles tendon rupture in the rat was studied by immunohistochemistry including semi-quantitative assessment. Neuronal markers for regenerating and mature fibers, ie., growth associated protein 43 (GAP-43) and protein gene product 9.5 (PGP 9.5), respectively, were analyzed at different time points (1-16 weeks) post-rupture. In the paratenon, both the ruptured and intact contralateral tendon (control) consistently exhibited immunoreactivity to the two neuronal markers. However, in the proper tendinous tissue only the ruptured tendon showed immunoreactivity to GAP-43 and PGP 9.5. This expression was seen already at week 1 post-rupture to reach a peak at week 6 followed by a successive drop till week 16. Also the occurrence of sensory and autonomic fibers according to immunoreactivity for calcitonin gene-related peptide (CGRP) and neuropeptide Y (NPY), respectively, was analyzed. CGRP-positivity was abundantly seen from weeks 2-6 in both perivascular and sprouting free nerve endings in the proper tendon tissue undergoing healing. NPY appeared later, at weeks 6-8 post-rupture around blood vessels mainly located in the surrounding loose connective tissue. Apart from a role in vasoaction (CGRP, vasodilatory; NPY, vasoconstrictory). both neuropeptides have been implicated in fibroblast and endothelial cell proliferation required for angiogenesis. The present study shows that early healing of ruptured tendons is characterized by an orchestrated, temporal appearance of nerve fibers expressing peptides with different actions. The observed pattern of neuronal regeneration and neuropeptide expression may prove to be important for normal connective tissue healing. 相似文献
9.
10.
H W Losken W M Morris P B Uys J W Earle P A Le Roux E Ackermann 《Suid-Afrikaanse tydskrif vir geneeskunde》1988,73(10):575-577
Trauma to the orbital region may result in fractures of the bony orbit, displacement of which gives rise to malposition of the eye and diplopia. If initial treatment is not feasible or is unsuccessful, later correction may be achieved by osteotomy or reduction and stabilisation of the bony fragments, often with bone grafts. Displaced medial or lateral canthi may need to be repositioned, where feasible in an overcorrected position. Where bone grafts are necessary, the skull is now favoured as the best donor site. 相似文献