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   4640篇
  免费   336篇
  国内免费   6篇
  4982篇
  2023年   23篇
  2022年   57篇
  2021年   95篇
  2020年   54篇
  2019年   59篇
  2018年   114篇
  2017年   94篇
  2016年   149篇
  2015年   242篇
  2014年   262篇
  2013年   316篇
  2012年   346篇
  2011年   360篇
  2010年   203篇
  2009年   196篇
  2008年   249篇
  2007年   201篇
  2006年   238篇
  2005年   196篇
  2004年   196篇
  2003年   177篇
  2002年   162篇
  2001年   98篇
  2000年   100篇
  1999年   79篇
  1998年   33篇
  1997年   30篇
  1996年   29篇
  1995年   25篇
  1994年   31篇
  1993年   26篇
  1992年   48篇
  1991年   36篇
  1990年   32篇
  1989年   28篇
  1988年   22篇
  1987年   25篇
  1986年   19篇
  1985年   17篇
  1984年   17篇
  1983年   20篇
  1979年   22篇
  1977年   16篇
  1975年   17篇
  1974年   24篇
  1973年   17篇
  1972年   21篇
  1970年   15篇
  1969年   15篇
  1967年   13篇
排序方式: 共有4982条查询结果,搜索用时 15 毫秒
91.
This review focuses on utilization of plant lectins as medical diagnostic reagents and tools. The lectin-related diagnostic is aimed at detection of several diseases connected to alteration of the glycosylation profiles of cells and at identification of microbial and viral agents in clinical microbiology. Certain lectins, proposed for or used as diagnostic tools could even recognize those cellular determinants, which are not detected by available antibodies. Broad information is presented on the lectinomics field, illustrating that lectin diagnostics might become practical alternative to antibody-based diagnostic products. In addition, the rising trend of lectin utilization in biomedical diagnostics might initiate a development of innovative methods based on better analytical technologies. Lectin microarray, a rapid and simple methodology, can be viewed as an example for such initiative. This technology could provide simple and efficient screening tools for analysis of glycosylation patterns in biological samples (cellular extracts, tissues and the whole cells), allowing thus personalized detection of changes associated with carbohydrate-related diseases.  相似文献   
92.
Rhesus monkeys have been kept in horizontal position under klinostatic or antiorthostatic hypokinetic conditions for 7 and 19 days. Using scanning electron microscope, studies were made of the otolithic membrane of the utricle, the receptor surface of the utricle, crista ampullaris of the lateral semicircular canals, the organ of Corti, the stria vascularis and spiral ligament. No significant differences were found between control and experimental animals.  相似文献   
93.
94.
95.
96.
97.
Sleep and Biological Rhythms - Neurovascular coupling (NVC), the transient regional hyperemia following the evoked neuronal responses, is the basis of blood oxygenation level-dependent techniques...  相似文献   
98.
The bicarbonate buffer is considered as the most biorelevant buffer system for the simulation of intestinal conditions. However, its use in dissolution testing of solid oral dosage forms is very limited. The reason for this is the thermodynamic instability of the solution containing hydrogen carbonate ions and carbonic acid. The spontaneous loss of carbon dioxide (CO2) from the solution results in an uncontrolled increase of the pH. In order to maintain the pH on the desired level, either a CO2 loss must be completely avoided or the escaped CO2 has to be replaced by quantitative substitution, i.e. feeding the solution with the respective amount of gas, which re-acidifies the buffer after dissociation. The present work aimed at the development of a device enabling an automatic pH monitoring and regulation of hydrogen carbonate buffers during dissolution tests.  相似文献   
99.
100.
Although edema is evident immediately after a burn, the diffusion of nutrient chemical constituents of the body is not impaired. Blister fluid, not unlike plasma or serum, contained all substances found in the body, including parenterally administered penicillin. The elevation of potassium and the cation to anion imbalance is primarily due to the Na/K cellular pump malfunction, and the destruction of the permeability of the cell membrane is most likely a direct result of complement and other cellular enzymes, which include the prostaglandins and thromboxanes. The elevated SGOT, CPK, and LDH indicated severe trauma to the cells in the immediate area of burn and possibly to the skeletal muscle. The presence of immunoglobulins indicated that high-molecular-weight proteins diffuse equally well during this edematous phase (IgM, 900,000; IgG, 190,000). Evidence of this nature strongly suggests that the integrity of the burn blister by maintained.  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