全文获取类型
收费全文 | 419篇 |
免费 | 38篇 |
国内免费 | 17篇 |
出版年
2023年 | 5篇 |
2022年 | 12篇 |
2021年 | 8篇 |
2020年 | 7篇 |
2019年 | 5篇 |
2018年 | 3篇 |
2017年 | 8篇 |
2016年 | 11篇 |
2015年 | 16篇 |
2014年 | 18篇 |
2013年 | 23篇 |
2012年 | 22篇 |
2011年 | 24篇 |
2010年 | 26篇 |
2009年 | 19篇 |
2008年 | 18篇 |
2007年 | 21篇 |
2006年 | 13篇 |
2005年 | 19篇 |
2004年 | 6篇 |
2003年 | 16篇 |
2002年 | 13篇 |
2001年 | 17篇 |
2000年 | 16篇 |
1999年 | 10篇 |
1998年 | 14篇 |
1997年 | 6篇 |
1996年 | 7篇 |
1995年 | 4篇 |
1994年 | 7篇 |
1993年 | 5篇 |
1992年 | 2篇 |
1991年 | 6篇 |
1990年 | 7篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1987年 | 5篇 |
1986年 | 7篇 |
1985年 | 4篇 |
1982年 | 5篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 2篇 |
1973年 | 4篇 |
1970年 | 2篇 |
1967年 | 2篇 |
1966年 | 7篇 |
1964年 | 2篇 |
1962年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有474条查询结果,搜索用时 15 毫秒
461.
462.
463.
464.
1. The effect of stimulating the lumbar sympathetic trunk has been observed on cat lumbrical and tenuissimus muscle spindles. 2. Spindle afferent discharges were recorded either from single Ia fibers in teased dorsal root filaments or from a large number of spindles by integrating their discharges led from muscles nerves. 3. Blood flow in small arteries supplying the muscle was observed through a microscope during and after the stimulation of the sympathetic trunk. 4. In some spindles repetitive stimulation of the sympathetic trunk elicited, after a few seconds delay, a small increase in firing rate. This can be ascribed to a direct action of sympathetic axons on the spindles because it precedes by about 20-30 sec the reduction of blood flow observed in the muscle arteries. This effect is not accompanied by a change in dynamic sensitivity of the primary ending. 5. This early effect is followed, after 20-30 sec, by a later rise in firing frequency which still progresses after the end of stimulation and eventually terminates in an abrupt fall in firing often leading to interruption of the ending activity. Recovery takes places at a variable time after the blood flow has bee reestablished. These long lasting effects can be ascribed to reduction of blood flow in muscle spindles since they are always associated with changes in blood flow in muscle arteries and since they are mimicked by occlusion of the muscle circulation. 6. In some spindles, the amplitudes of frequencygrams elicited by stimulation of static gamma axons were slightly increased suggesting a weak facilitatory effect on the contraction of some intrafusal muscle fibers. 相似文献
465.
466.
Most eukaryotes including fungi, amoebas, and animal cells assemble an actin/myosin-based contractile ring during cytokinesis. The majority of proteins implied in ring formation, maturation, and constriction are evolutionarily conserved, suggesting that common mechanisms exist among these divergent eukaryotes. Here, we review the recent advances in positioning and assembly of the actomyosin ring in the fission yeast Schizosaccharomyces pombe, the budding yeast Saccharomyces cerevisiae, and animal cells. In particular, major findings have been made recently in understanding ring formation in genetically tractable S. pombe, revealing a dynamic and robust search, capture, pull, and release mechanism. 相似文献
467.
468.
469.
470.