全文获取类型
收费全文 | 2933篇 |
免费 | 171篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 68篇 |
儿科学 | 64篇 |
妇产科学 | 43篇 |
基础医学 | 488篇 |
口腔科学 | 76篇 |
临床医学 | 261篇 |
内科学 | 534篇 |
皮肤病学 | 30篇 |
神经病学 | 253篇 |
特种医学 | 250篇 |
外科学 | 475篇 |
综合类 | 31篇 |
预防医学 | 136篇 |
眼科学 | 36篇 |
药学 | 216篇 |
中国医学 | 10篇 |
肿瘤学 | 148篇 |
出版年
2023年 | 24篇 |
2022年 | 38篇 |
2021年 | 70篇 |
2020年 | 40篇 |
2019年 | 53篇 |
2018年 | 87篇 |
2017年 | 72篇 |
2016年 | 58篇 |
2015年 | 86篇 |
2014年 | 125篇 |
2013年 | 145篇 |
2012年 | 235篇 |
2011年 | 262篇 |
2010年 | 176篇 |
2009年 | 120篇 |
2008年 | 191篇 |
2007年 | 189篇 |
2006年 | 180篇 |
2005年 | 199篇 |
2004年 | 150篇 |
2003年 | 132篇 |
2002年 | 107篇 |
2001年 | 14篇 |
2000年 | 11篇 |
1999年 | 16篇 |
1998年 | 23篇 |
1997年 | 35篇 |
1996年 | 20篇 |
1995年 | 18篇 |
1994年 | 15篇 |
1993年 | 12篇 |
1992年 | 9篇 |
1991年 | 13篇 |
1990年 | 15篇 |
1989年 | 12篇 |
1988年 | 18篇 |
1987年 | 7篇 |
1986年 | 11篇 |
1985年 | 11篇 |
1982年 | 11篇 |
1981年 | 9篇 |
1980年 | 12篇 |
1979年 | 13篇 |
1978年 | 8篇 |
1977年 | 6篇 |
1976年 | 7篇 |
1975年 | 6篇 |
1973年 | 6篇 |
1970年 | 4篇 |
1967年 | 4篇 |
排序方式: 共有3119条查询结果,搜索用时 15 毫秒
41.
42.
43.
Domagoj Vra?i? Zoran Miovski Maja Strozzi Ivan Puhar Ana Badovinac Darko Bo?i? Darije Plan?ak 《Acta stomatologica Croatica》2015,49(1):14-20
Purpose
The aim of this research was to investigate the association of chronic and aggressive periodontitis with the severity of coronary artery disease which was angiographically verified.Material and methods
Subjects were selected among the hospitalized patients at the University Hospital Centre Zagreb who had coronary angiography done because of the chest pain. Thorough clinical examination included periodontal indices and clinical and socio-demographic characteristics of participants. Subjects were divided in two test groups, acute coronary syndrome (ACS) and stable coronary artery disease (CAD), and the control group with no significant CAD. Data were analyzed using Kruskal-Wallis and Pearson’s Chi-Square test.Results
From 106 subjects, 66 (62.3%) were hospitalized for ACS, 22 (20.7%) had stable CAD and only 18 (17.0%) had no significant CAD. Only 26 (24.5%) out of 106 patients were never smokers (p<0.05). Chronic periodontitis was the most common finding with 68.2% in ACS group and 54.5% in stable CAD group, while healthy patients without periodontitis (72.6%) were dominant in the control group (p<0.001). Stable CAD group had the highest mean probing depth (PD) 3.92±1.16, gingival recession (GR) 1.34±0.78, clinical attachment level (CAL) 4.60±1.41 and bleeding on probing (BOP) 45.98±26.19 values, whereas ACS group had mean PD value of 3.77±0.91, GR 1.11±0.66, CAL 4.32±1.08 and BOP 41.30±22.09, and no significant CAD group had mean PD value of 3.27±0.97, GR 0.69±0.37, CAL 3.62±1.04 and BOP 26.39±13.92 (p<0.05).Conclusion
Periodontitis was shown to be associated with angiographically verified coronary artery disease. Physical inactivity, poor oral hygiene and periodontal inflammation were observed in patients with ACS and stable CAD.Key words: Periodontitis, Periodontal Index, Cardiovascular Diseases, Coronary Artery Disease, Coronary Angiography 相似文献44.
45.
Vujić Dragana Petrović Sandra Lazić Emilija Kuzmanović Miloš Leskovac Andreja Joksić Ivana Mićić Dragan Jovanović Ankica Zečević Željko Guć-Šćekić Marija Ćirković Sanja Joksić Gordana 《Indian journal of pediatrics》2014,81(3):260-265
Objective
To investigate genetic subtypes of inherited bone marrow failure syndrome Fanconi anemia (FA) in Sebia. FA-D2 subtype was found to be the most frequent genetic subtype among investigated FA patients; specific observations of FA-D2 phenotype are pointed out.Methods
Several biological endpoints of FA cells in vitro such as radiation-induced level of lymphocyte micronuclei (radiosensitivity), base line and radiation induced level of the DNA double strand breaks (DSBs), leukocyte apoptosis, and telomere capping function were assessed.Results
The results indicate that all FA-D2 patients display radioresistant in vitro response, which is seen as significantly reduced yield of radiation-induced micronuclei. On the contrary, FA-A patients display radiosensitive in vitro response seen as increased number of radiation-induced micronuclei (MN). A massive elimination of irradiated cells via apoptosis is found in both FA-A and FA-D2 subtypes. In FA-A subtype apoptosis positively relates with the yield of radiation-induced MN, whereas in FA-D2 subtype apoptosis relates with a high percentage of cells carrying dysfunctional telomeres. The present results unequivocally demonstrate that cytokinesis-block micronucleus (CBMN) assay and analyses of telomere capping function can be used to distinguish FA-D2 and FA-A complementation groups.Conclusions
Considering all biological endpoints were analyzed, it can be concluded that all FA patients are radiosensitive, regardless of their complementation group. Thus, using CBMN test and telomere capping function analysis can discriminate FA-A from FA-D2 complementation groups, which could be important for assessment the conditioning regimens prior to bone marrow transplantation. 相似文献46.
47.
48.
49.
Hutyra M Skála T Kamínek M Horák D Köcher M Tüdös Z Jarkovský J Přeček J Táborský M 《International journal of cardiology》2012,156(3):331-332
50.