首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   237篇
  免费   11篇
  国内免费   2篇
耳鼻咽喉   1篇
儿科学   12篇
妇产科学   2篇
基础医学   33篇
口腔科学   5篇
临床医学   31篇
内科学   37篇
皮肤病学   8篇
神经病学   9篇
特种医学   36篇
外科学   10篇
综合类   35篇
预防医学   12篇
眼科学   3篇
药学   4篇
中国医学   1篇
肿瘤学   11篇
  2022年   4篇
  2021年   3篇
  2020年   4篇
  2019年   1篇
  2018年   2篇
  2016年   3篇
  2015年   3篇
  2014年   8篇
  2013年   6篇
  2012年   18篇
  2011年   18篇
  2010年   15篇
  2009年   7篇
  2008年   13篇
  2007年   12篇
  2006年   12篇
  2005年   6篇
  2004年   7篇
  2003年   2篇
  2002年   4篇
  2001年   6篇
  2000年   2篇
  1999年   4篇
  1998年   9篇
  1997年   6篇
  1996年   16篇
  1995年   13篇
  1994年   5篇
  1993年   7篇
  1992年   1篇
  1991年   5篇
  1989年   7篇
  1988年   2篇
  1987年   4篇
  1986年   1篇
  1985年   3篇
  1984年   1篇
  1983年   1篇
  1982年   1篇
  1981年   2篇
  1980年   2篇
  1977年   1篇
  1975年   2篇
  1967年   1篇
排序方式: 共有250条查询结果,搜索用时 15 毫秒
41.
BACKGROUND: Life-threatening emergencies can occur at anytime, at anywhere and in anyone. Effective management of an emergency situation in the dental office is ultimately the dentist's responsibility. The lack of training and inability to cope with medical emergencies can lead to tragic consequences and sometimes legal complications. Therefore, health professionals including dentists must be well prepared to deal with medical emergencies. This study was undertaken to assess the knowledge about and attitude towards basic life support(BLS) among dental interns and postgraduate students in Bangalore city, India.METHODS: A cross sectional survey was conducted among dental interns and postgraduate students from May 2014 to June 2014 since few studies have been conducted in Bangalore city. A questionnaire with 17 questions regarding the knowledge about and attitude towards BLS was distributed to 202 study participants.RESULTS: The data analyzed using the Chi-square test showed that dental interns and postgraduate students had average knowledge about BLS. In the 201 participants, 121(59.9%) had a positive attitude and 81(40.1%) had a negative attitude towards BLS.CONCLUSIONS: Cardiopulmonary resuscitation should be considered as part of the dental curriculum. Workshops on a regular basis should be focused on skills of cardiopulmonary resuscitation for dental students.  相似文献   
42.
43.
Lingual dystonia, a type of focal dystonia that may be primary or secondary, is related to brain damage, neuroleptic use, neurodegenerative, metabolic, and neurodevelopmental disorders, varicella infection, and so on. However, primary lingual dystonia induced by speaking is a rare type of focal dystonia that is usually idiopathic in origin and is characterized by increased tonus of the tongue, which causes protrusion only during speaking. This report describes a 55-year-old male patient with lingual dystonia during speech. One interesting clinical feature of this case was that the speech disturbance improved while the patient vocalized a praise-like hymn in a manner that resembled singing.  相似文献   
44.
Micropapillary carcinomas (MPCs) can present as a rare histological special type of breast cancer; however, this histological type is more frequently found admixed with invasive ductal carcinomas of no special type (IDC‐NSTs). We have previously demonstrated that pure MPCs constitute a distinct entity at the morphological and genetic levels. Here, we sought to determine whether mixed MPCs have genomic aberrations similar to those found in pure MPCs, and to investigate whether the distinct morphological components of MPCs harbour different genetic aberrations. Using high‐resolution microarray comparative genomic hybridization (aCGH), we profiled a series of 10 MPCs of mixed histology and 20 IDC‐NSTs matched for grade and oestrogen receptor (ER) status. In addition, we generated tissue microarrays containing a series of 24 pure and 40 mixed MPCs and performed immunohistochemical analysis with ER, progesterone receptor (PR), Ki‐67, HER2, cytokeratin (CK) 5/6, CK14, CK17, EGFR, topoisomerase‐IIα, cyclin D1, caveolin‐1 and E‐cadherin antibodies. In situ hybridization was employed to evaluate the prevalence of HER2, TOP2A, EGFR, CCND1, MYC and FGFR1 gene amplification. Our results demonstrate that mixed MPCs harbour similar patterns of genomic aberrations and phenotype (82.5% luminal and 17.5% HER2) compared to pure MPCs. A comparison between the distinct morphological components of mixed MPCs in a pairwise fashion revealed that both components harbour strikingly similar genomic profiles. When compared to grade‐ and ER‐matched IDC‐NSTs, mixed MPCs significantly more frequently harboured amplification of multiple regions on 8q (adjusted Fisher's p value < 0.05). Furthermore, mixed MPCs displayed higher proliferative rates than grade‐ and ER‐matched IDC‐NSTs. Our results suggest that micropapillary differentiation in breast cancer may identify a subgroup of more aggressive ER‐positive breast carcinomas, even in those featuring a mixed histology, and that mixed MPCs are more closely related to pure MPCs than to IDC‐NSTs. Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.  相似文献   
45.

Background  

To determine association of nine single nucleotide polymorphisms (SNPs) in ADP ribosyltransferase-1 (ADPRT1), aldo-keto reductase family 1 member B1 (AKR1B1), receptor for advanced glycation end-products (RAGE), glutamine:fructose-6-phosphate amidotransferase-2 (GFPT2), and plasminogen activator inhibitor-1 (PAI-1) genes with chronic renal insufficiency (CRI) among Asian Indians with type 2 diabetes; and to identify epistatic interactionss between genes from the present study and those from renin-angiotensin-aldosterone system (RAAS), and chemokine-cytokine, dopaminergic and oxidative stress pathways (previously investigated using the same sample set).  相似文献   
46.

Objective

To more accurately define the annual incidence of cholera in India, believed to be higher than reported to the World Health Organization (WHO).

Methods

We searched the biomedical literature to extract data on the cases of cholera reported in India from 1997 to 2006 and compared the numbers found to those reported annually to WHO over the same period. The latter were obtained from WHO’s annual summaries of reported cholera cases and National health profile 2006, published by India’s Central Bureau of Health Intelligence.

Findings

Of India’s 35 states or union territories, 21 reported cholera cases during at least one year between 1997 and 2006. The state of West Bengal reported cases during all 10 years, while the state of Maharashtra and the union territory of Delhi reported cases during nine, and Orissa during seven. There were 68 outbreaks in 18 states, and 222 038 cases were detected overall. This figure is about six times higher than the number reported to WHO (37 783) over the same period. The states of Orissa, West Bengal, Andaman and Nicobar Islands, Assam and Chhattisgarh accounted for 91% of all outbreak-related cases.

Conclusion

The reporting of cholera cases in India is incomplete and the methods used to keep statistics on cholera incidence are inadequate. Although the data are sparse and heterogeneous, cholera notification in India is highly deficient.  相似文献   
47.
Ethnicity may be associated with the incidence of pneumococcal infections and the frequency of protective vaccine responses. Earlier studies have suggested that HIV-infected persons of black ethnicity develop less robust immune responses to pneumococcal vaccination that may relate to their higher incidence of invasive disease. We evaluated the association of ethnicity with capsule-specific antibody responses to pneumococcal revaccination, with either the pneumococcal conjugate (PCV) or polysaccharide (PPV) vaccines among 188 HIV-infected adults. The proportion of the 77 African Americans (AA) and 111 Caucasians with comparable virologic and immunologic parameters who achieved a positive immune response (≥2-fold rise in capsule-specific IgG from baseline with post-vaccination value ≥1 μg/mL for ≥2 of 4 serotypes) at day 60 after revaccination was similar (43% vs. 49%, respectively, p=0.65). Results were also similar when vaccine types (PPV and PCV) were examined separately. Mean changes in log(10) transformed IgG levels from baseline to days 60 and 180 post-vaccination were also not significantly different between AA and Caucasians. In summary, in this ethnically diverse cohort with equal access to care, we did not observe differential antibody responses between AA and Caucasian HIV-infected adults after pneumococcal revaccination.  相似文献   
48.
背景:多瘤病毒感染是导致多瘤病毒相关性肾病和移植肾失功的重要原因之一。 目的:观察分析多瘤病毒相关性肾病的临床特征及其病理学特点。 方法:121例患者移植肾活检行多瘤病毒大T抗原染色,发现9例阳性诊断为多瘤病毒相关性肾病,利用SV-40 大 T 抗原免疫组织化学染色,对确认为多瘤病毒相关性肾病患者进行临床、病理、免疫荧光、免疫组织化学观察。 结果与结论:多瘤病毒相关性肾病组肾活检时检测霉酚酸-AUC 0-12和他克莫司血药浓度均明显高于同期非多瘤病毒相关性肾病组(P < 0.05)。9例活检组织经SV-40 大T抗原染色,肾皮质和髓质均可见散在的肾小管多瘤病毒阳性。免疫荧光IgG,IgM,IgA,C3,C4,C1q和C4d全阴性,所有肾组织病理均可见肾间质大量聚集的CD3,CD4,CD8,CD68阳性细胞,1例合并排斥反应者,人白细胞DR抗原和白细胞介素2受体高表达;不合并排斥者人白细胞DR抗原和白细胞介素2受体表达多小于5%。9例多瘤病毒相关性肾病患者随访均超过半年,移植肾失功1例,3例好转,2例稳定,3例恶化。结果表明,多瘤病毒相关性肾病的诊断主要依赖于移植肾活检组织病理;利用SV-40 大T 抗原免疫组织化学染色可提高多瘤病毒相关性肾病的诊断率;移植肾组织C4d、白细胞介素2受体和人白细胞DR抗原检测对多瘤病毒感染相关性肾病的鉴别诊断具有极其重要的临床价值。  相似文献   
49.

Background

Psychological effects of Coronary Artery Bypass graft (CABG) have been of interest all over the world but there is a paucity of Indian work.

Methods

30 patients undergoing CABG at a service hospital were included. All patients filled a specially designed proforma. Mini Mental Status Examination, Hospital anxiety and depression scale, Coronary scale, Seattle angina questionnaire and Euro-QOL 5D were performed before and seven days after CABG.

Results

43.3% had significant anxiety and 30% had significant depression before CABG. Following CABG, 36.67% of the patients had significant anxiety while 40% had significant depression. On the Seattle angina questionnaire, physical limitation reduced from 71.6 ± 7.9 to 53.1 ± 14.6. There was significant improvement in treatment satisfaction from 37.8 ± 6.1 to 59.4 ± 4.2 following CABG. On th euro quality of life scale (EQ5D) health status improved from 38.17 ± 9.51 before CABG to 68.5 ± 5.28 after CABG.

Conclusion

There is a significant incidence of anxiety and depression in patients undergoing CABG, both before and after surgery.Key Words: CABG, anxiety, depression  相似文献   
50.
用化学偶联法将抗人膀胱癌单克隆抗体分子偶联到阿霉素白蛋白毫微球上,构建了一个有靶向杀伤性的免疫毫微球,即:阿霉素白蛋白载单克隆抗体毫微球(ADR-NP-Ab)。改变阿霉素毫微球和单克隆抗体的反应分子比,确定了制备该免疫毫微球的最佳条件。经免疫荧光检测及显微照像分析证明,免疫毫微球可有效地和人膀胱癌细胞结合。体外杀伤试验表明,此免疫毫微球对靶细胞EJ有高度特异杀伤活性,而对无关的人直肠癌Lovo细胞则无明显作用。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号