全文获取类型
收费全文 | 2576564篇 |
免费 | 208483篇 |
国内免费 | 4528篇 |
专业分类
耳鼻咽喉 | 37471篇 |
儿科学 | 79928篇 |
妇产科学 | 70550篇 |
基础医学 | 366773篇 |
口腔科学 | 73082篇 |
临床医学 | 232846篇 |
内科学 | 504122篇 |
皮肤病学 | 52643篇 |
神经病学 | 214344篇 |
特种医学 | 103380篇 |
外国民族医学 | 920篇 |
外科学 | 392156篇 |
综合类 | 61559篇 |
现状与发展 | 2篇 |
一般理论 | 1115篇 |
预防医学 | 204986篇 |
眼科学 | 60735篇 |
药学 | 192632篇 |
4篇 | |
中国医学 | 4908篇 |
肿瘤学 | 135419篇 |
出版年
2018年 | 26696篇 |
2017年 | 20569篇 |
2016年 | 22668篇 |
2015年 | 25633篇 |
2014年 | 36618篇 |
2013年 | 55843篇 |
2012年 | 74887篇 |
2011年 | 78917篇 |
2010年 | 46835篇 |
2009年 | 44643篇 |
2008年 | 74759篇 |
2007年 | 79619篇 |
2006年 | 80433篇 |
2005年 | 78201篇 |
2004年 | 75386篇 |
2003年 | 72720篇 |
2002年 | 71666篇 |
2001年 | 120524篇 |
2000年 | 124725篇 |
1999年 | 105360篇 |
1998年 | 29874篇 |
1997年 | 27359篇 |
1996年 | 27130篇 |
1995年 | 26214篇 |
1994年 | 24658篇 |
1993年 | 22953篇 |
1992年 | 84600篇 |
1991年 | 81847篇 |
1990年 | 79042篇 |
1989年 | 76191篇 |
1988年 | 70709篇 |
1987年 | 69528篇 |
1986年 | 65856篇 |
1985年 | 62838篇 |
1984年 | 47444篇 |
1983年 | 40415篇 |
1982年 | 24579篇 |
1981年 | 21746篇 |
1979年 | 44379篇 |
1978年 | 31270篇 |
1977年 | 26327篇 |
1976年 | 24618篇 |
1975年 | 26068篇 |
1974年 | 32138篇 |
1973年 | 30581篇 |
1972年 | 28587篇 |
1971年 | 26359篇 |
1970年 | 24877篇 |
1969年 | 23058篇 |
1968年 | 21092篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
R. Di Raimondo J. Sanz-Esporrn R. Pl I. Sanz-Martn F. Luengo F. Vignoletti J. Nuez Mariano Sanz 《Clinical oral investigations》2020,24(7):2351-2361
To evaluate the changes in alveolar contour after guided bone regeneration (GBR) with two different combinations of biomaterials in dehiscence defects arou 相似文献
102.
103.
104.
105.
106.
107.
108.
L.‐Q. Zheng X.‐C. Han Y. Huang H.‐W. Li X.‐D. Niu J. Li 《Clinical and experimental dermatology》2015,40(3):293-297
Porocarcinoma is an unusual, locally aggressive and potentially fatal neoplasm. Several cutaneous malignancies have been described in association with porocarcinoma, including squamous cell carcinoma, basal cell carcinoma and tricholemmal carcinoma. Previous reports have indicated that the occurrence of malignant tumours in combination with porocarcinoma is extremely rare, in particular with regard to Bowen disease (BD). We report an uncommon case of porocarcinoma occurring synchronously in a single BD lesion in a 63‐year‐old woman with multiple BD lesions. The clinical and histological findings confirmed this diagnosis. 相似文献
109.
Rishad R. Jivani Gaurang J. Lakhtaria Dhaval D. Patadiya Laxman D. Patel Nurrudin P. Jivani Bhagyesh P. Jhala 《Saudi Pharmaceutical Journal》2016,24(1):1-20
Advancement in microelectromechanical system has facilitated the microfabrication of polymeric substrates and the development of the novel class of controlled drug delivery devices. These vehicles have specifically tailored three dimensional physical and chemical features which together, provide the capacity to target cell, stimulate unidirectional controlled release of therapeutics and augment permeation across the barriers. Apart from drug delivery devices microfabrication technology’s offer exciting prospects to generate biomimetic gastrointestinal tract models. BioMEMS are capable of analysing biochemical liquid sample like solution of metabolites, macromolecules, proteins, nucleic acid, cells and viruses. This review summarized multidisciplinary application of biomedical microelectromechanical systems in drug delivery and its potential in analytical procedures. 相似文献
110.
M. R. D. Maslin S. K. Lloyd S. Rutherford S. Freeman A. King D. R. Moore K. J. Munro 《Journal of the Association for Research in Otolaryngology》2015,16(5):631-640
Individuals with sudden unilateral deafness offer a unique opportunity to study plasticity of the binaural auditory system in adult humans. Stimulation of the intact ear results in increased activity in the auditory cortex. However, there are no reports of changes at sub-cortical levels in humans. Therefore, the aim of the present study was to investigate changes in sub-cortical activity immediately before and after the onset of surgically induced unilateral deafness in adult humans. Click-evoked auditory brainstem responses (ABRs) to stimulation of the healthy ear were recorded from ten adults during the course of translabyrinthine surgery for the removal of a unilateral acoustic neuroma. This surgical technique always results in abrupt deafferentation of the affected ear. The results revealed a rapid (within minutes) reduction in latency of wave V (mean pre = 6.55 ms; mean post = 6.15 ms; p < 0.001). A latency reduction was also observed for wave III (mean pre = 4.40 ms; mean post = 4.13 ms; p < 0.001). These reductions in response latency are consistent with functional changes including disinhibition or/and more rapid intra-cellular signalling affecting binaurally sensitive neurons in the central auditory system. The results are highly relevant for improved understanding of putative physiological mechanisms underlying perceptual disorders such as tinnitus and hyperacusis. 相似文献