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   711篇
  免费   43篇
  国内免费   12篇
耳鼻咽喉   9篇
儿科学   22篇
妇产科学   19篇
基础医学   109篇
口腔科学   18篇
临床医学   69篇
内科学   134篇
皮肤病学   9篇
神经病学   63篇
特种医学   44篇
外科学   86篇
综合类   65篇
预防医学   42篇
眼科学   7篇
药学   35篇
中国医学   1篇
肿瘤学   34篇
  2022年   5篇
  2021年   9篇
  2020年   7篇
  2019年   11篇
  2018年   8篇
  2017年   9篇
  2016年   13篇
  2015年   17篇
  2014年   15篇
  2013年   19篇
  2012年   19篇
  2011年   27篇
  2010年   19篇
  2009年   34篇
  2008年   32篇
  2007年   44篇
  2006年   19篇
  2005年   22篇
  2004年   25篇
  2003年   19篇
  2002年   27篇
  2001年   17篇
  2000年   13篇
  1999年   16篇
  1998年   23篇
  1997年   24篇
  1996年   16篇
  1995年   10篇
  1994年   8篇
  1993年   7篇
  1992年   19篇
  1991年   17篇
  1990年   17篇
  1989年   26篇
  1988年   24篇
  1987年   16篇
  1986年   7篇
  1985年   15篇
  1984年   10篇
  1983年   14篇
  1982年   12篇
  1981年   3篇
  1980年   8篇
  1979年   4篇
  1975年   3篇
  1969年   2篇
  1968年   2篇
  1958年   11篇
  1957年   4篇
  1952年   2篇
排序方式: 共有766条查询结果,搜索用时 15 毫秒
1.
2.
Neuropsychiatric disturbances are extremely common in Alzheimer’s disease (AD), and represent integral features of the illness, as well as appropriate targets for therapy. We are interested in designing trials aimed at preventing or delaying the emergence of psychopathology in AD. For symptomatic treatment of agitation, mood stabilizers, particularly sodium valproate, have proved to be beneficial in some patients. Since these effects take several weeks to emerge, we considered that they might be dependent on potentially neuroprotective actions of valproate, such as inhibition of apoptosis and slowing of neurofibrillary tangle formation. In this article we present the rationale for testing the neuroprotective potential of valproate experimentally in mouse models of tauopathy and in a clinical trial of patients with AD who lack psychopathology at baseline. Together, these studies will provide important tests of the hypothesis that valproate, either through inhibition of tau phosphorylation or some other mechanism, is a useful therapeutic agent to modify disease progression in AD.  相似文献   
3.
de Vries Reilingh  TS  van Geldere  D  Langenhorst  BLAM  de Jong  D  van der Wilt  GJ  van Goor  H  Bleichrodt  RP 《Hernia》2004,8(1):56-59
Polypropylene mesh is widely used for the reconstruction of incisional hernias that cannot be closed primarily. Several techniques have been advocated to implant the mesh. The objective of this study was to evaluate, retrospectively, early and late results of three different techniques, onlay, inlay, and underlay. The records of 53 consecutive patients with a large midline incisional hernia — 25 women and 28 men, mean age 60.4 (range 28–94) — were reviewed. Polypropylene mesh was implanted using the onlay technique in 13 patients, inlay in 23 patients, and underlay in 17 patients. Either the greater omentum or a polyglactin mesh was interponated between the mesh and the viscera. The records of these 53 patients were reviewed with respect to: size and cause of the hernia, pre- and postoperative mortality and morbidity, with special attention to wound complications. Patients were invited to attend the outpatient clinic at least 12 months after implantation of the mesh for physical examination of the abdominal wall. Postoperative complications occurred in 14 (26.4%) patients. The onlay technique had significantly more complications, as compared to both other techniques. Reherniation occurred in 15 (28.3%) patients. The reherniation rate of the inlay technique was significantly higher than after the underlay technique (44% vs 12%, P=0.03) and tended to be higher than the onlay technique (44% vs 23%, P=0.22). Repair of large midline incisional hernias with the use of a polypropylene mesh carries a high risk of complications and has a high reherniation rate. The underlay technique seems to be the better technique.  相似文献   
4.
The synthesis of 2,4-dione derivatives of 1,5-benzodithiepine, 1,5-benzodiazepine and 1,5-benzothiazepine and the anti-microbial activity in vitro of these derivatives and of analogous of 1,5-benzodioxepine, 1,5-benzoxathiepine and 1,5-benzoxazepine, previously prepared, are reported. Some of these compounds showed a good activity against some Gram positive microorganisms and blastomycetes.  相似文献   
5.
The morphologic distinction between thyroid carcinoma and certain benign thyroid conditions can be difficult in selected cases. P-glycoprotein (Pgp), a glycoprotein associated with tumor multidrug resistance, has been reported to be expressed in thyroid carcinoma but not in benign thyroid conditions. To determine the specificity of immunostaining for Pgp in the diagnosis of thyroid carcinoma, we studied formalin-fixed, paraffin-embedded tissue from 69 cases of various thyroid lesions using a commercially available monoclonal antibody to Pgp (C219, Centocor, Malvern, PA) and an avidin-biotin-peroxidase complex technique. Positive reactivity was seen in 15 of 37 (41%) benign thyroid conditions and in 23 of 32 (72%) thyroid carcinomas. We conclude that immunostaining for Pgp is not specific in the diagnosis of thyroid carcinoma.  相似文献   
6.
H Knispel  K P Dieckmann  G Henze  V Loy 《Der Urologe. Ausg. A》1990,29(4):226-9; discussion 213-4
A rare case of metastatic nephroblastoma on the right side in a 28-year-old female patient is presented. Complete remission was achieved by inductive chemotherapy with vincristine, Adriamycin, actinomycin D and cyclophosphamide and subsequent radical nephrectomy. There was no evidence of disease 24 months after the initial diagnosis had been made. The problems specific to the diagnosis and treatment of adult Wilms tumor are discussed. A chemotherapy regimen known to be successful in childhood Wilms tumor was shown to be equally effective in our adult patient.  相似文献   
7.
The authors report the clinical and laboratory findings of a patient who had severe immune hemolytic anemia due to hydrochlorothiazide (HCTZ). In this case, the HCTZ antibody reacted not only with other thiazide and thiazide-like drugs, but also with a chemically unrelated diuretic, ethacrynic acid. These results indicate that HCTZ antibody activity is not restricted solely to the thiazides and imply that therapy with any of the reactive drugs would be contraindicated for this patient. The serologic screening for drug reactivity may be useful for selecting alternative therapy for patients with drug-induced immune hemolytic anemia.  相似文献   
8.
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - Nach der Collectivity-of-Drinking-Cultures-Theorie von Skog finden Veränderungen des Alkoholkonsums in allen...  相似文献   
9.
Pediatric health screening procedures, both prenatal and postnatal, have a tremendous potential in improving the health status of children and in turn reducing the resource burden on the parents and the State. The existing recommendations, inherent problems and different screening procedures are discussed. The need for suitable mass screening pediatric procedures in the Indian context is stressed.KEY WORDS: Pediatric screening procedures  相似文献   
10.
Oncostatin M: development of a pleiotropic cytokine   总被引:4,自引:0,他引:4  
  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