全文获取类型
收费全文 | 419篇 |
免费 | 34篇 |
出版年
2022年 | 4篇 |
2021年 | 5篇 |
2020年 | 8篇 |
2019年 | 4篇 |
2018年 | 12篇 |
2017年 | 5篇 |
2016年 | 11篇 |
2015年 | 24篇 |
2014年 | 20篇 |
2013年 | 32篇 |
2012年 | 31篇 |
2011年 | 31篇 |
2010年 | 24篇 |
2009年 | 17篇 |
2008年 | 26篇 |
2007年 | 24篇 |
2006年 | 22篇 |
2005年 | 29篇 |
2004年 | 19篇 |
2003年 | 19篇 |
2002年 | 22篇 |
2001年 | 7篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 5篇 |
1997年 | 4篇 |
1996年 | 3篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1990年 | 5篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 3篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有453条查询结果,搜索用时 15 毫秒
451.
Antonello E. Spinelli Emilano D'Agostino Sara Broggi Fiorino Claudio Federico Boschi 《Journal of biophotonics》2020,13(7)
The main objective of this work was the development of a novel 2D dosimetry approach for small animal external radiotherapy using radioluminescence imaging (RLI) with a commercial complementary metal oxide semiconductor detector. Measurements of RLI were performed on the small animal image‐guided platform SmART, RLI data were corrected for perspective distortion using Matlab. Four irradiation fields were tested and the planar 2D dose distributions and dose profiles were compared against dose calculations performed with a Monte Carlo based treatment planning system and gafchromic film. System linearity and RLI image noise against dose were also measured. The maximum difference between beam size measured with RLI and nominal beam size was less than 8% for all the tested beams. The image correction procedure was able to reduce perspective distortion. A novel RLI approach for quality assurance of a small animal irradiator was presented and tested. Results are in agreement with MC dose calculations and gafchromic film measurements. 相似文献
452.
453.
Stefania Morrone Susanna Scarpa Antonello Punturieri Roberto Testi Angela Gismondi Giorgio Santoni Mario Piccoli Luigi Frati Andrea Modesti Angela Santoni 《Experimental cell research》1989,182(2)
Natural killer (NK) cells have been suggested to play a major role in resistance against metastatic spread of tumors. This study was aimed at understanding whether laminin (LM), a component of the extracellular matrix involved in the mechanism of tumor invasion and cell interaction, is expressed by NK cells. The results indicate that NK cells can synthesize and display on the cell surface LM and that TPA can modulate its expression. Our findings suggest that the presence of LM on NK cells could be relevant in the control of tumor invasion by NK cells. 相似文献