全文获取类型
收费全文 | 247篇 |
免费 | 17篇 |
出版年
2023年 | 1篇 |
2022年 | 3篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 4篇 |
2018年 | 4篇 |
2017年 | 4篇 |
2016年 | 14篇 |
2015年 | 16篇 |
2014年 | 20篇 |
2013年 | 15篇 |
2012年 | 18篇 |
2011年 | 12篇 |
2010年 | 8篇 |
2009年 | 10篇 |
2008年 | 19篇 |
2007年 | 18篇 |
2006年 | 10篇 |
2005年 | 15篇 |
2004年 | 10篇 |
2003年 | 10篇 |
2002年 | 1篇 |
2001年 | 11篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1993年 | 2篇 |
1992年 | 5篇 |
1991年 | 7篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1979年 | 3篇 |
1975年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有264条查询结果,搜索用时 187 毫秒
261.
Daisuke Nii Mariko Miyachi Yuichiro Shimada Yosuke Nozawa Masahiro Ito Yoshikazu Homma Shu Ikehira Yoshinori Yamanoi Hiroshi Nishihara Tatsuya Tomo 《Photosynthesis research》2017,133(1-3):155-162
Photosystem I (PS I) is a large pigment–protein complex embedded in the thylakoid membranes that performs light-driven electron transfer across the thylakoid membrane. Carbon nanotubes exhibit excellent electrical conductivities and excellent strength and stiffness. In this study, we generated PSI–carbon nanotube conjugates dispersed in a solution aimed at application in artificial photosynthesis. PS I complexes in which a carbon nanotube binding peptide was introduced into the middle of the PsaE subunit were conjugated on a single-walled carbon nanotube, orienting the electron acceptor side to the nanotube. Spectral and photoluminescence analysis showed that the PS I is bound to a single-walled carbon nanotube, which was confirmed by transmission electron microscopy. Photocurrent observation proved that the photoexcited electron originated from PSI and transferred to the carbon nanotube with light irradiation, which also confirmed its orientated conjugation. The PS I–carbon nanotube conjugate will be a useful nano-optoelectronic device for the development of artificial systems. 相似文献
262.
263.
Morisaka Tadamichi Furuichi Tomo Kogi Kazunobu Yoshioka Motoi 《Journal of Ethology》2023,41(2):141-151
Journal of Ethology - The group definition for an animal population is important for building associations among individuals (i.e., social network). Indo-Pacific bottlenose dolphins (Tursiops... 相似文献
264.
Probucol prevents oxidative injury to endothelial cells 总被引:5,自引:0,他引:5
We evaluated the effect of the antioxidant, probucol, on the cytotoxic effects of oxidized low density lipoprotein (OX-LDL) or of cumene hydroperoxide (CumOOH) on cultured bovine endothelial cells (EC). The addition of CumOOH to EC caused the release of lactate dehydrogenase and the accumulation of thiobarbituric acid-reacting substances (TBARS), effects that were protected against by preincubation with either probucol or tocopherol. Similarly, preincubation of EC with those antioxidants protected against OX-LDL toxicity and the accumulation of TBARS. The content of probucol in EC measured by high performance liquid chromatography was directly correlated with the extent of protection against OX-LDL toxicity. We also found that treatment of EC with serum from patients receiving treatment with probucol resulted in the detection of probucol in the cells. We conclude that probucol is transported and incorporated into EC membranes to act as a radical-trapping antioxidant, protecting the EC against oxidative stress. Our results also indicate that lipid peroxidation in cellular membranes involves cell injury inflicted by OX-LDL. 相似文献