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   155篇
  免费   14篇
  169篇
  2015年   2篇
  2013年   1篇
  2012年   2篇
  2011年   2篇
  2010年   1篇
  2009年   3篇
  2008年   1篇
  2007年   4篇
  2006年   2篇
  2005年   4篇
  2004年   2篇
  2003年   2篇
  2002年   2篇
  2001年   1篇
  2000年   4篇
  1999年   6篇
  1996年   1篇
  1993年   1篇
  1992年   6篇
  1991年   10篇
  1990年   7篇
  1989年   4篇
  1988年   5篇
  1987年   7篇
  1986年   2篇
  1985年   5篇
  1984年   3篇
  1983年   2篇
  1982年   3篇
  1981年   2篇
  1980年   4篇
  1979年   9篇
  1978年   5篇
  1977年   6篇
  1976年   2篇
  1975年   1篇
  1974年   3篇
  1973年   9篇
  1972年   3篇
  1971年   4篇
  1970年   5篇
  1969年   3篇
  1968年   4篇
  1967年   5篇
  1966年   6篇
  1953年   2篇
  1952年   1篇
排序方式: 共有169条查询结果,搜索用时 15 毫秒
161.
162.
163.
Rabbit autoantibodies to aorta   总被引:1,自引:0,他引:1  
  相似文献   
164.
The role of cell interactions in lymphocyte stimulation was analyzed by studying the kinetics of lymphocyte proliferation at different cell concentrations, and also by a lymphocyte microculture technique in solid medium. An absolute requirement for cell interactions was found in lymphocyte responses to concanavalin A, pokeweed mitogen, sodium periodate, purified protein derivative from Mycobacterium tuberculosis, and zinc chloride. No requirement for cell interactions was found in lymphocyte responses to calcium ionophore A23187. The existence of lymphocyte subpopulations with different requirements for cell interactions was observed in lymphocyte responses to phytohemagglutinin P, phytohemagglutinin HA 17, tetradecanoyl-phorbolacetate, antiserum to MOLT-4 lymphoblasts, antiserum to B411-4 lymphoblasts, antiserum to human embryo lung fibroblasts, and antiserum to HeLa cells infected with Herpes simplex virus. Lymphocyte responses to phytohemagglutinin P were potentiated by incorporation into the solid cultures of red blood cells of their membrane preparations suggesting that membrane-membrane interactions, either directly, or through soluble mediators are likely to be the basis of cell cooperation in this system. In solid cultures, phytohemagglutinin P, phytohemagglutinin P plus red blood cells, phytohemagglutinin HA 17, tetradecanoyl-phorbol-acetate and antiserum to MOLT-4 lymphoblasts were found to stimulate mainly thymus-dependent lymphocytes, whereas antiserum to Hela cells infected with Herpes simplex virus stimulated mainly non-thymus-dependent lymphocytes. Antiserum to B411-4 lymphoblasts stimulated both thymus-dependent and non-thymus dependent lymphocytes.  相似文献   
165.
166.
167.
GVHR was elicited in adult F1 hybrids by iv injection of parental spleen cells. The F1 hybrids were then immunized with θ-AKR antigen. Plaque-forming cells (PFC) producing antibodies lytic for AKR thymocytes were enumerated in spleens of experimental animals using the method of cytolysis in agar-gel. The number of PFC found in spleens of animals grafted with parental cells was significantly lower than the number in spleens of animals grafted with syngeneic cells. The degree of suppression of immune response to θ-AKR depended on: (1) the duration of GVHR at the time of immunization, (2) the parental strain and the number of parental cells grafted to evoke GVHR, and (3) the source of cells grafted. Thymus and bone marrow cells when grafted together showed a synergistic effect in suppression of the host's immune response. Immunosuppression of the response to θ-AKR seems to be a more sensitive indicator of GVHR in adult F1 hybrids than splenomegaly, which is commonly used as a means of assessment of GVHR. The possible role of immunosuppression in the pathogenesis of GVHR is briefly discussed.  相似文献   
168.
In situ hybridization experiments on human chromosomes were performed using probes corresponding to the 5' and 3' parts of human TSHR cDNA. Both probes allowed a regional localization on chromosome 14q31.  相似文献   
169.
Probes corresponding to human and porcine LH (luteinizing hormone) receptor cDNA were used for in situ hybridization to human chromosomes. This allowed us to assign the LH receptor gene to chromosome 2p21.  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