全文获取类型
收费全文 | 970篇 |
免费 | 45篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 31篇 |
妇产科学 | 16篇 |
基础医学 | 160篇 |
口腔科学 | 35篇 |
临床医学 | 65篇 |
内科学 | 176篇 |
皮肤病学 | 17篇 |
神经病学 | 122篇 |
特种医学 | 7篇 |
外科学 | 124篇 |
综合类 | 15篇 |
现状与发展 | 1篇 |
预防医学 | 40篇 |
眼科学 | 29篇 |
药学 | 115篇 |
中国医学 | 7篇 |
肿瘤学 | 50篇 |
出版年
2024年 | 2篇 |
2023年 | 4篇 |
2022年 | 21篇 |
2021年 | 26篇 |
2020年 | 17篇 |
2019年 | 16篇 |
2018年 | 23篇 |
2017年 | 17篇 |
2016年 | 25篇 |
2015年 | 14篇 |
2014年 | 44篇 |
2013年 | 54篇 |
2012年 | 82篇 |
2011年 | 72篇 |
2010年 | 42篇 |
2009年 | 43篇 |
2008年 | 70篇 |
2007年 | 80篇 |
2006年 | 55篇 |
2005年 | 43篇 |
2004年 | 47篇 |
2003年 | 42篇 |
2002年 | 36篇 |
2001年 | 17篇 |
2000年 | 11篇 |
1999年 | 6篇 |
1998年 | 11篇 |
1997年 | 2篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 5篇 |
1992年 | 7篇 |
1991年 | 12篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1986年 | 2篇 |
1985年 | 11篇 |
1984年 | 5篇 |
1983年 | 3篇 |
1981年 | 4篇 |
1980年 | 5篇 |
1979年 | 3篇 |
1978年 | 4篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1969年 | 1篇 |
1962年 | 1篇 |
1961年 | 2篇 |
1930年 | 1篇 |
排序方式: 共有1017条查询结果,搜索用时 15 毫秒
1.
Ramshekhar N. Menon Nirav Sanghani Mahendra Javali Neeraj Jain Arun B. Shah 《Annals of Indian Academy of Neurology》2009,12(1):40-44
We report an unusual case of sporadic adult onset cerebellar ataxia with hypogonadism. A 40-year-old unmarried man presented with progressive ataxia and dysarthria along with complaints of non-development of secondary sexual characteristics and erectile dysfunction. There were complaints of intermittent diarrhea. Clinical examination revealed a pan-cerebellar syndrome with features of hypoandrogenism. No eye movement abnormalities were evident. There were signs of malabsorption. Investigations confirmed the presence of auto-antibodies found in celiac disease, and a duodenal biopsy confirmed the same. Hypoandrogenism was postulated to be due to hypergonadotropic hypogonadism which has been mentioned in a few patients of celiac disease. However, the pattern seen in our patient was of a hypogonadotropic hypogonadism. This is probably secondary to an autoimmune hypophysitis seen in some patients in the absence of other clinical manifestations. Autoantibody testing should be a diagnostic necessity in any adult with a sporadic cerebellar ataxia. 相似文献
2.
Mahendra Naik Anil Chadha Nayan Parekh Vatsal Patel 《Indian journal of otolaryngology and head and neck surgery》1991,43(1):17-22
Velopharyngeal incompetence (VPI) is a condition of incomplete closure of V.P. port area, normally formed by velum and posterior pharyngeal watt. The condition primarily results in various types of speech defects, which form- the main complaint of the patient. We have studied 10 cases of VPI due to various causes and the speech improvement obtained by flap pharyngoplasty procedures. The results have been evaluated with a follow-up of six months. Highly encouraging results only indicate a more frequent need to undertake such surgery without any hesitation if the ENT surgeon is familiar with and has an adequate exposure to this simple and effective procedure. 相似文献
3.
Jones DL Weiss SM Chitalu N Villar O Kumar M Bwalya V Mumbi M 《American journal of infectious diseases》2007,3(4):169-176
An estimated 38.6 million persons globally are living with HIV, of whom over 1.1 million reside in Zambia. Of the 2 million cases in the US, 64% of new cases among women are among African Americans. Alcohol and drug use represents a significant risk factor for HIV transmission among both Zambians and African Americans. In addition, gender dynamics in both the US and Zambia promote transmission. This study examines two interventions targeting HIV risk behavior among HIV positive substance users, women in Miami, USA (the New Opportunities for Women (NOW) Project) and men in Lusaka, Zambia (the Partner Project). The study compares the efficacy of these two culturally tailored sexual behavior interventions provided in group and individual session formats. US and Zambian participants increased sexual barrier use and reduced substance-related sexual risk. Comparatively greater gains were made by higher risk Zambian males than US females in both group and individual conditions. Among lower risk participants, women in the group condition achieved and sustained the greatest comparative risk reductions. Results suggest that cost effective group HIV transmission risk reduction interventions for multiethnic individuals can be successfully implemented among both female and male drug and alcohol users in multinational settings. 相似文献
4.
5.
6.
Acrylic acid (AA) was polymerized with NO2 in tetrahydrofuran (THF) and in 1,4-dioxane. The effects of monomer and initiator concentration and of temperature on polymer conversion, initial rate of polymerization, and molecular weight were studied. The overall activation energy of polymerization was found to be 16,3 kcal mol?1 (68,23 kJ · mol?1) and 15,54 kcal · mol?1 (65,05 kJ · mol?1) in THF and in 1,4-dioxane, respectively. High molecular weight polymers (M ca. 105) were obtained. The polymerization appears to be initiated by free radicals. 相似文献
7.
8.
Jo-Lynn S. Tan Niranjan Sathianathen Marcus Cumberbatch Prokar Dasgupta Alexandre Mottrie Ronney Abaza Koon Ho Rha Thyavihally B. Yuvaraja Dipen J. Parekh Umberto Capitanio Rajesh Ahlawat Sudhir Rawal Nicolò M. Buffi Ananthakrishnan Sivaraman Kris K. Maes Gagan Gautam Francesco Porpiglia Levent Turkeri Mahendra Bhandari Benjamin Challacombe James Roscoe Porter Craig R. Rogers Daniel A. Moon 《BJU international》2021,128(Z3):30-35
9.
10.
Sudhir Tauro Charles Craddock Karl Peggs Gulnaz Begum Premini Mahendra Gordon Cook Judith Marsh Donald Milligan Anthony Goldstone Ann Hunter Asim Khwaja Raj Chopra Timothy Littlewood Andrew Peniket Anne Parker Graham Jackson Geoff Hale Mark Cook Nigel Russell Stephen Mackinnon 《Journal of clinical oncology》2005,23(36):9387-9393
PURPOSE: The toxicity of allogeneic stem-cell transplantation can be substantially reduced using a reduced-intensity conditioning (RIC) regimen. This has increased the proportion of patients with myeloid malignancies eligible for allogeneic transplantation. However, the capacity of RIC allografts to produce durable remissions in patients with acute myeloid leukemia (AML) and myelodysplasia (MDS) has not yet been defined, and consequently, the role of RIC allografts in the management of these diseases remains conjectural. PATIENTS AND METHODS: Seventy-six patients with high-risk AML or MDS received an allograft using a fludarabine/melphalan RIC regimen incorporating alemtuzumab. The median age of the cohort was 52 years (range, 18 to 71 years). RESULTS: The 100-day transplantation-related mortality rate was 9%, and no patient developed greater than grade 2 graft-versus-host disease. With a median follow-up of 36 months (range, 13 to 70 months), 27 patients were alive and in remission, with 3-year actuarial overall survival (OS) and disease-free survival (DFS) rates of 41% and 37%, respectively. The 3-year OS and DFS rates of patients with AML in complete remission at the time of transplantation were 48% and 42%, respectively. Disease relapse was the most common cause of treatment failure and occurred at a median time of 6 months after transplantation. All but one patient destined to relapse did so within 24 months of transplantation. CONCLUSION: The extended follow-up in this series identifies a high risk of early disease relapse but provides evidence that RIC allografts can produce sustained DFS in a significant number of patients with AML who would be ineligible for allogeneic transplantation with myeloablative conditioning. 相似文献