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   2152篇
  免费   140篇
  国内免费   24篇
耳鼻咽喉   11篇
儿科学   79篇
妇产科学   52篇
基础医学   407篇
口腔科学   40篇
临床医学   141篇
内科学   417篇
皮肤病学   60篇
神经病学   114篇
特种医学   106篇
外科学   373篇
综合类   29篇
预防医学   170篇
眼科学   43篇
药学   110篇
中国医学   7篇
肿瘤学   157篇
  2022年   13篇
  2021年   29篇
  2020年   28篇
  2019年   48篇
  2018年   49篇
  2017年   32篇
  2016年   41篇
  2015年   46篇
  2014年   70篇
  2013年   85篇
  2012年   121篇
  2011年   110篇
  2010年   101篇
  2009年   70篇
  2008年   86篇
  2007年   88篇
  2006年   88篇
  2005年   93篇
  2004年   91篇
  2003年   86篇
  2002年   78篇
  2001年   76篇
  2000年   48篇
  1999年   53篇
  1998年   36篇
  1997年   26篇
  1996年   22篇
  1995年   28篇
  1994年   18篇
  1993年   19篇
  1992年   30篇
  1991年   39篇
  1990年   32篇
  1989年   42篇
  1988年   37篇
  1987年   46篇
  1986年   33篇
  1985年   26篇
  1984年   28篇
  1983年   21篇
  1981年   11篇
  1980年   12篇
  1979年   19篇
  1978年   22篇
  1977年   12篇
  1975年   9篇
  1974年   13篇
  1972年   11篇
  1971年   13篇
  1968年   13篇
排序方式: 共有2316条查询结果,搜索用时 15 毫秒
1.
2.
3.
We describe a 15-y-old girl with Fechtner-like syndrome, who is the first Chinese reported to have this rare syndrome. She presented with left homonymous hemianopia and neuroimaging revealed haemorrhage in both parietal and occipital lobes. Peripheral blood smear showed macrothrombocytopenia and intracytoplasmic inclusion bodies inside leucocytes. Thrombocytopenia and proteinuria responded to intravenous immunoglobulin and pulsed methylprednisolone. This case illustrates that life-threatening haemorrhage can occur in patients with Fechtner syndrome. Although there was no effective treatment reported in the literature, high dose steroid and immunoglobulin seemed to be useful in our patient. Our patient also had nephritic-nephrotic syndrome with renal insufficiency, which is unusual in adolescent female patients.  相似文献   
4.
Summary Unresectable solid tumors in the metastatic stage are quite resistant to current chemotherapy and radiation therapy regimens. Flavone acetic acid (FAA) is a novel antitumor agent which appears to work through a different mechanism than the conventional chemotherapeutic agents. In preclinical studies it has shown effectiveness against a variety of transplantable murine and human tumors and appears to be solid tumor selective. It also has non-overlapping toxicities as compared to conventional agents. We therefore investigated FAA in vitro against human colon cancer cells and explored whether its effectiveness could be enhanced in combination with other agents such as adriamycin (ADR), cis-platinum (CP) and difluoromethyornithine (DFMO) — an inhibitor of polyamine biosynthesis. Addition of FAA for 24 hours in liquid media produced dose dependent growth inhibition. Using soft agar colony assay, growth was inhibited by 58% by 3mM FAA and only 1.4% by 0.375mM FAA. The combination of FAA and cis-platinum produced synergism at the lower doses tested. The combination of FAA and adriamycin produced antagonism at all doses tested and the combination of FAA with DFMO did not produce results significantly different from DFMO alone. We conclude that enhancement of FAA activity can be achieved in combination with conventional antitumor agents, but may be drug and dose specific.  相似文献   
5.
G Gueth  A Lukács 《Orvosi hetilap》1992,133(16):973-4, 979
The authors discuss the essence of Dupuytren disease occurring in the plantar aponeurosis with literary surveys. They briefly outline the essence of the well-known different theories which endeavour to explain the causes of the development of this disease of unknown etiology. In their article, they deal with its clinical manifestation, histological changes and therapeutical possibilities in connection with the 5 cases treated by them.  相似文献   
6.
7.
G Lukács  G Balázs  E Uray  F Juhász 《Orvosi hetilap》1991,132(47):2587-2590
During a period of thirty years (1959-1989) 374 patients underwent surgery for differentiated thyroid carcinoma at the 1st Department of Surgery of the University Medical School in Debrecen. Distant metastases were found in the lungs or bones in 36 patients (9.6%). In 20 patients the first clinical sign of the primary disease was the distant metastasis. The aspects of surgical treatment depended on whether the metastases were solitary or multiple, capable or uncapable of radioiodine uptake. Whereas the majority of pulmonary metastases respond well to 131I-treatment the therapy of bone metastases is multidisciplinary. The 5-year survival rate was 47%, the 10-year one 19%.  相似文献   
8.
Inadequate débridement, extensive scarring, and breakdown of the wound have been commonly encountered after surgical débridement has been employed as the initial treatment of infection with Mycobacterium marinum involving the deep structures of the hand. Because of our disappointment with the results of this form of treatment, from 1982 to 1986 we treated twenty-four patients who had such an infection with rifampicin and ethambutol after a diagnostic biopsy was done. Surgical treatment was deferred until it was determined that the infection had not been controlled by the chemotherapy. The clinical outcome for these patients could be divided into three patterns: eleven patients (Group I) had a good result with no complications, three patients (Group II) had delayed healing of the wound, and ten patients (Group III) did not have a good response to conservative treatment and required one or more surgical débridements. Complications were sometimes associated with use of the drugs, and loss of visual acuity was a concern in three patients. In twenty-one (87 per cent) of the patients, at follow-up the function of the treated hand was equal to that of the other hand. Persistent pain, a discharging sinus, and previous local injection of steroids were unfavorable prognostic factors. If these factors are present, surgical débridement is advised.  相似文献   
9.
10.
Benfluron at concentrations of 0.26 and 0.52 mumol l-1 inhibited the formation of V79 colonies in a concentration-dependent way. Diminution of the size of colonies of the treated cells was accompanied by a decrease in protein content per cell. At the same time an increase in metabolic activity was observed. Benfluron blocked the V79 cells in S and G2 phases of the cell cycle and at higher concentrations induced cell lysis documented by alterations in cell membrane permeability and morphology. The in vitro membrane effect of benfluron involved a biphasic modulation of the cardiac sarcolemmal (Na+ + K+)-ATPase activity.  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