全文获取类型
收费全文 | 2908篇 |
免费 | 147篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 26篇 |
儿科学 | 69篇 |
妇产科学 | 104篇 |
基础医学 | 300篇 |
口腔科学 | 47篇 |
临床医学 | 265篇 |
内科学 | 907篇 |
皮肤病学 | 55篇 |
神经病学 | 144篇 |
特种医学 | 41篇 |
外科学 | 518篇 |
综合类 | 64篇 |
预防医学 | 174篇 |
眼科学 | 73篇 |
药学 | 157篇 |
中国医学 | 13篇 |
肿瘤学 | 116篇 |
出版年
2023年 | 29篇 |
2022年 | 73篇 |
2021年 | 113篇 |
2020年 | 54篇 |
2019年 | 91篇 |
2018年 | 113篇 |
2017年 | 58篇 |
2016年 | 86篇 |
2015年 | 73篇 |
2014年 | 115篇 |
2013年 | 129篇 |
2012年 | 214篇 |
2011年 | 217篇 |
2010年 | 110篇 |
2009年 | 114篇 |
2008年 | 171篇 |
2007年 | 180篇 |
2006年 | 157篇 |
2005年 | 178篇 |
2004年 | 169篇 |
2003年 | 129篇 |
2002年 | 122篇 |
2001年 | 33篇 |
2000年 | 21篇 |
1999年 | 26篇 |
1998年 | 22篇 |
1997年 | 15篇 |
1996年 | 17篇 |
1995年 | 15篇 |
1994年 | 14篇 |
1993年 | 15篇 |
1992年 | 35篇 |
1991年 | 32篇 |
1990年 | 19篇 |
1989年 | 12篇 |
1988年 | 22篇 |
1987年 | 9篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 4篇 |
1980年 | 2篇 |
1977年 | 4篇 |
1975年 | 4篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1968年 | 6篇 |
1967年 | 7篇 |
1966年 | 3篇 |
排序方式: 共有3073条查询结果,搜索用时 15 毫秒
51.
52.
Gynecomastia is an enlargement of male breast resulting from a proliferation of its glandular component, and it is usually due to an altered estrogen-androgen balance. It should be differentiated from pseudogynecomastia, which is characterized by fat deposition without glandular proliferation and from breast carcinoma. Gynecomastia could be physiological in neonates and pubertal or pathological due to drug intake, chronic liver, or renal disease, hyperthyroidism, testicular or adrenal neoplasms, and hypogonadism whether primary, or secondary. Properly organized work-up is needed to reach the cause of gynecomastia. Here, we reported a case of a young Omani man with gynecomastia with the aim of creating awareness of the occurrence of Klinefelter’s syndrome (KS) in patients with gynecomastia, to observe any differences in clinical presentation of KS from those reported in the literature, and highlight the needed diagnostic work-up and treatment.Gynecomastia is an enlargement of male breast resulting from a proliferation of its glandular component. It is usually benign, bilateral, and characterized by the presence of a rubbery or firm mass around the nipples. It usually results from either increased estrogen level, increased breast sensitivity to estrogen,1 or low testosterone level. The highest incidence of gynecomastia is reported during neonatal period, puberty, and aging due to physiological disturbances. Pseudogynecomastia, which is often seen in obese men, refers to fat deposition without glandular proliferation and should be differentiated from gynecomastia. Therefore, male breast enlargement can be fatty (pseudogynecomastia or lipomastia), pure gynecomastia, or mixed. Our objective in presenting this particular case is to create awareness of the occurrence of Klinefelter’s syndrome (KS) in patients with gynecomastia, to observe any differences in clinical presentation of KS from those reported in the literature, and highlight the needed diagnostic work-up and treatment. 相似文献
53.
Ömer Nuri Pamuk Umut Kalyoncu Kenan Aksu Ahmet Omma Yavuz Pehlivan Yonca Çağatay Orhan Küçükşahin Salim Dönmez Gözde Yıldırım Çetin Rıdvan Mercan Özün Bayındır Ayşe Çefle Fatih Yıldız Ayşe Balkarlı Levent Kılıç Necati Çakır Bünyamin Kısacık Mustafa Ferhat Öksüz Veli Çobankara Ahmet Mesut Onat Mehmet Sayarlıoğlu Mehmet Akif Öztürk Gülsüm Emel Pamuk Nurullah Akkoç 《Rheumatology international》2016,36(7):945-953
In this multicenter, retrospective study, we evaluated the efficacy and safety of biologic therapies, including anti-TNFs, in secondary (AA) amyloidosis patients with ankylosing spondylitis (AS) and rheumatoid arthritis (RA). In addition, the frequency of secondary amyloidosis in RA and AS patients in a single center was estimated. Fifty-one AS (39M, 12F, mean age: 46.7) and 30 RA patients (11M, 19F, mean age: 51.7) with AA amyloidosis from 16 different centers in Turkey were included. Clinical and demographical features of patients were obtained from medical charts. A composite response index (CRI) to biologic therapy—based on creatinine level, proteinuria and disease activity—was used to evaluate the efficacy of treatment. The mean annual incidence of AA amyloidosis in RA and AS patients was 0.23 and 0.42/1000 patients/year, respectively. The point prevalence in RA and AS groups was 4.59 and 7.58/1000, respectively. In RA group with AA amyloidosis, effective response was obtained in 52.2 % of patients according to CRI. RA patients with RF positivity and more initial disease activity tended to have higher response rates to therapy (p values, 0.069 and 0.056). After biologic therapy (median 17 months), two RA patients died and two developed tuberculosis. In AS group, 45.7 % of patients fulfilled the criteria of good response according to CRI. AS patients with higher CRP levels at the time of AA diagnosis and at the beginning of anti-TNF therapy had higher response rates (p values, 0.011 and 0.017). During follow-up after anti-TNF therapy (median 38 months), one patient died and tuberculosis developed in two patients. Biologic therapy seems to be effective in at least half of RA and AS patients with AA amyloidosis. Tuberculosis was the most important safety concern. 相似文献
54.
Correlation between apoptotic endothelial microparticles and serum interleukin-6 and C-reactive protein in healthy men 总被引:3,自引:0,他引:3
Chirinos JA Zambrano JP Virani SS Jimenez JJ Jy W Ahn E Horstman LL Castellanos A Myerburg RJ Ahn YS 《The American journal of cardiology》2005,95(10):1258-1260
Inflammation has been associated with increased cardiovascular risk, and endothelial cell (EC) apoptosis has been implicated in atherogenesis. The correlation between circulating concentrations of interleukin-6 (IL-6), C-reactive protein (CRP), and endothelial microparticles (EMPs) expressing an apoptotic (EMP31) or activation (EMP62E) phenotype in 20 middle-aged healthy men was investigated. IL-6 was significantly correlated with EMP31 (r = 0.6, p = 0.004), which persisted after adjusting for body mass index and CRP. CRP was significantly correlated with body mass index (r = 0.49, p = 0.02) but not with EMP31 or EMP62E. EC apoptosis is associated with IL-6 levels in men and might be partially responsible for the increased cardiovascular risk associated with subclinical inflammation. 相似文献
55.
56.
Tanuja N. Gengiah Leila E. Mansoor Michele Upfold Anushka Naidoo Nonhlanhla Yende-Zuma Angela D. M. Kashuba Quarraisha Abdool Karim Salim S. Abdool Karim 《AIDS and behavior》2014,18(5):820-825
In the CAPRISA 004 trial, adherence was estimated as the proportion of reported sex acts covered by two gel doses, which was assessed by counting returned empty gel applicators. The returned empty applicators were inspected visually in a standardized manner for residue on the outside of the applicator, as an indicator of vaginal insertion. Over 15 months, spanning 11,839 study visits by 838 women, a total of 59,800 returned empty applicators were inspected. By visual assessment, 77.5 % of these applicators appeared to have been inserted. To test the accuracy of the assessment we fitted a Cox model and found that the risk for HIV infection was doubled when less than half of the returned empty applicators had been assessed as not inserted in the vagina. Visual inspection enhanced both the accuracy of the adherence measurement and aided identification of mechanical problems with applicator use experienced by women in the trial. 相似文献
57.
Andrew Tomita Nigel Garrett Lise Werner Jonathan K. Burns Nelisiwe Ngcobo Nomthandazo Zuma Koleka Mlisana Francois van Loggerenberg Salim S. Abdool Karim 《AIDS and behavior》2014,18(9):1801-1807
Concerns are often raised regarding potentially adverse effects of antiretroviral therapy (ART) on health-related quality of life (HRQoL), but there is limited longitudinal data to prove this. Building on our prior investigation, we examined the impact of ART on HRQoL among HIV-infected South African women with extensive follow-up in the CAPRISA 002 Acute Infection Cohort Study. Overall HRQoL and five sub-domains [physical well-being (PWB), emotional well-being (EWB), functional and global well-being (FGWB), social well-being (SWB) and cognitive functioning (CF)] were assessed using the Functional Assessment of HIV Infection (FAHI) instrument. Our analyses comparing FAHI scores between pre-ART (established infection) and ART phases using paired Wilcoxon signed-rank tests and adjusted mixed-effects regression models revealed improvements on ART in overall HRQoL, and in PWB, EWB, and SWB, but not in FGWB and CF. No long-term adverse impact of ART on HRQoL was detected, providing additional non-biomedical support to early treatment strategies. 相似文献
58.
Kathryn Therese Mngadi Silvia Maarschalk Anneke C. Grobler Leila E. Mansoor Janet A. Frohlich Bernadette Madlala Nelisiwe Ngcobo Salim S. Abdool Karim Quarraisha Abdool Karim 《AIDS and behavior》2014,18(5):849-854
Young women in sub-Saharan Africa are disproportionately affected by HIV, making the development of women initiated and controlled methods of prevention, including microbicides, a priority. Adherence is pivotal to microbicide efficacy and partner related factors are known to impact adherence. An analysis of disclosure of gel use to sexual partners and adherence in CAPRISA 004 women was conducted to better understand this relationship. Partner disclosure was significantly associated with a modest 4.2 % increased adherence (71.0 vs. 66.8 %, p = 0.03). Most women rated the experience of disclosure as positive, despite 6.7 % of partners expressing a negative reaction.Participants who disclosed were more likely to reside with their regular partner (14.4 vs. 8.4 %; p = 0.01) and reported consistent condom use at baseline (32.9 vs. 20.9 %; p < 0.01). Partner disclosure needs to be better understood as a potential facilitator or barrier to microbicide adherence. 相似文献
59.
Giuseppe Stabile Antoine Lepillier Ermenegildo De Ruvo Marco Scaglione Matteo Anselmino Frederic Sebag Domenico Pecora Mark Gallagher Mariano Rillo Graziana Viola Luca Rossi Valerio De Santis Maurizio Landolina Antonello Castro Massimo Grimaldi Nicolas Badenco Maurizio Del Greco Antonio De Simone Ennio Pisan Salim Abbey Filippo Lamberti Antonio Pani Giulio Zucchelli Giuseppe Sgarito Daniela Dugo Emanuele Bertaglia Teresa Strisciuglio Francesco Solimene 《Journal of cardiovascular electrophysiology》2020,31(7):1694-1701
60.
Arief Rahadian Daiju Fukuda Hotimah Masdan Salim Shusuke Yagi Kenya Kusunose Hirotsugu Yamada Takeshi Soeki Masataka Sata 《Journal of atherosclerosis and thrombosis》2020,27(11):1141
Aim: Recent studies have demonstrated that selective sodium–glucose cotransporter 2 inhibitors (SGLT2is) reduce cardiovascular events, although their mechanism remains obscure. We examined the effect of canagliflozin, an SGLT2i, on atherogenesis and investigated its underlying mechanism.Method: Canagliflozin (30 mg/kg/day) was administered by gavage to streptozotocin-induced diabetic apolipoprotein E-deficient (ApoE−/−) mice. Sudan IV staining was performed at the aortic arch. Immunostaining, quantitative RT-PCR, and vascular reactivity assay were performed using the aorta. In vitro experiments using human umbilical vein endothelial cells (HUVECs) were also performed.Result: Canagliflozin decreased blood glucose (P < 0.001) and total cholesterol (P < 0.05) levels. Sudan IV staining showed that 12-week canagliflozin treatment decreased atherosclerotic lesions (P < 0.05). Further, 8-week canagliflozin treatment ameliorated endothelial dysfunction, as determined by acetylcholine-induced vasodilation (P < 0.05), and significantly reduced the expressions of inflammatory molecules such as ICAM-1 and VCAM-1 in the aorta at the RNA and protein levels. Canagliflozin also reduced the expressions of NADPH oxidase subunits such as NOX2 and p22phox in the aorta and reduced urinary excretion of 8-OHdG, suggesting a reduction in oxidative stress. Methylglyoxal, a precursor of advanced glycation end products, increased the expressions of ICAM-1 and p22phox in HUVECs (P < 0.05, both). Methylglyoxal also decreased the phosphorylation of eNOSSer1177 and Akt but increased the phosphorylation of eNOSThr495 and p38 MAPK in HUVECs.Conclusion: Canagliflozin prevents endothelial dysfunction and atherogenesis in diabetic ApoE−/− mice. Anti-inflammatory and antioxidative potential due to reduced glucose toxicity to endothelial cells might be its underlying mechanisms. 相似文献