全文获取类型
收费全文 | 2334篇 |
免费 | 177篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 37篇 |
儿科学 | 171篇 |
妇产科学 | 27篇 |
基础医学 | 393篇 |
口腔科学 | 65篇 |
临床医学 | 145篇 |
内科学 | 477篇 |
皮肤病学 | 34篇 |
神经病学 | 221篇 |
特种医学 | 49篇 |
外科学 | 205篇 |
综合类 | 71篇 |
预防医学 | 141篇 |
眼科学 | 54篇 |
药学 | 170篇 |
中国医学 | 11篇 |
肿瘤学 | 247篇 |
出版年
2023年 | 12篇 |
2022年 | 26篇 |
2021年 | 96篇 |
2020年 | 63篇 |
2019年 | 56篇 |
2018年 | 73篇 |
2017年 | 55篇 |
2016年 | 64篇 |
2015年 | 70篇 |
2014年 | 106篇 |
2013年 | 120篇 |
2012年 | 156篇 |
2011年 | 161篇 |
2010年 | 96篇 |
2009年 | 85篇 |
2008年 | 109篇 |
2007年 | 140篇 |
2006年 | 99篇 |
2005年 | 118篇 |
2004年 | 91篇 |
2003年 | 79篇 |
2002年 | 59篇 |
2001年 | 54篇 |
2000年 | 57篇 |
1999年 | 53篇 |
1998年 | 36篇 |
1996年 | 16篇 |
1995年 | 12篇 |
1994年 | 11篇 |
1993年 | 7篇 |
1992年 | 24篇 |
1991年 | 26篇 |
1990年 | 24篇 |
1989年 | 25篇 |
1988年 | 26篇 |
1987年 | 19篇 |
1986年 | 21篇 |
1985年 | 22篇 |
1984年 | 18篇 |
1983年 | 13篇 |
1981年 | 7篇 |
1980年 | 7篇 |
1979年 | 14篇 |
1978年 | 12篇 |
1977年 | 11篇 |
1976年 | 9篇 |
1974年 | 11篇 |
1973年 | 6篇 |
1972年 | 7篇 |
1970年 | 7篇 |
排序方式: 共有2518条查询结果,搜索用时 31 毫秒
1.
2.
Urvashi Razdan R. M. Raizada V. N. Chaturvedi 《Indian journal of otolaryngology and head and neck surgery》2004,56(1):20-22
Objective To assess the efficacy of conservative modalities in the management of epistaxis.
Study design Prospective case studies.
Setting Rural medical college hospital.
Patients Indoor and outdoor patients with epistaxis.
lntervention Conservative(non surgical) management techniques in epistaxis.
Results Chemical cauterization was successful in 72.07% cases, anterior nasal packing in 84.5% and posterior nasal packing in 95.6%
cases.
Conclusion Out of 300 cases of epistaxis included in the study (except for one case that required internal maxillary artery ligation).
all cases were treated successfully with conservative treatment alongwith treating the underlying pathology causing epistaxis. 相似文献
3.
Ruma Pahwa Nita Khurana K Uma Chaturvedi Anoop Raj 《Indian journal of otolaryngology and head and neck surgery》2003,55(3):193-194
Neurilemmoma is usually soimry, benign tumour derived from schwan cells of the Sheaths of peripheral cranial or autonomie
nerves. In thehead and neck region it occurs most commonly in association with acoustic nerve within the skuil and is rely
fottnd in the oral cavity (1,2). We report here two cases of the iongue diagnosed on histopathohgy. 相似文献
4.
5.
P Chaturvedi U C Chaturvedi R Mukherjee 《International journal of experimental pathology》1992,73(6):773-782
The helper T cells (TH) generated in dengue type 2 virus (DV) infection of mice produce a soluble helper cytokine (HF) which enhances the clonal expansion of DV-specific IgM antibody plaque forming cells (PFC). The present study was undertaken to investigate the mechanism of transmission of the helper signal from TH and HF to B cells. It was observed that TH could transmit the helper signal to B cells by direct cell to cell contact, but HF could not do so without the presence of live macrophages (M phi). HF was adsorbed by both heat killed and live M phi but the former could not transmit it to B cells. Both the polypeptide chains of HF bind to M phi. HF remains on the surface of M phi and can be retrieved completely by contact with B cells for 40 min. The helper signal from TH or HF-adsorbed M phi could not be transmitted to B cells when they were separated from each other by a cell impermeable membrane. The enhancement of PFC count is greater when the signal is transmitted by HF-adsorbed M phi as compared to that by TH alone. Thus, even with lower frequency of TH a significant number of B cells may be triggered with the help of HF and M phi. The findings thus show that the DV-specific helper signal could be transmitted only by a close physical contact of the plasma membranes of the signal presenting cells (TH or HF-adsorbed M phi) and B cells. 相似文献
6.
7.
8.
John D Morris Elizabeth T Golub Shruti H Mehta Lisa P Jacobson Stephen J Gange 《AIDS research and therapy》2007,4(1):12-8
Background
Sustained use of antiretroviral therapy has been consistently shown to be one of the primary predictors of long-term effectiveness. Switching and discontinuation reflect patient and provider decisions that may limit future treatment options. In this study, we utilize data reported at semi-annual study visits from three prospective cohort studies, the AIDS Link to IntraVenous Exposure (ALIVE), the Women's Interagency HIV Study (WIHS), and the Multicenter AIDS Cohort Study (MACS), to investigate determinants of HAART modification with a particular focus on reported injection drug use (IDU). 相似文献9.
Different types of leprosy vaccines are currently used in field trials in India. The rationale behind their use, the parameters for determining their efficacy, their merits and demerits are discussed and the future prospects are highlighted. 相似文献
10.