全文获取类型
收费全文 | 1074篇 |
免费 | 72篇 |
国内免费 | 48篇 |
专业分类
1194篇 |
出版年
2024年 | 1篇 |
2023年 | 17篇 |
2022年 | 19篇 |
2021年 | 57篇 |
2020年 | 28篇 |
2019年 | 63篇 |
2018年 | 42篇 |
2017年 | 39篇 |
2016年 | 48篇 |
2015年 | 67篇 |
2014年 | 72篇 |
2013年 | 56篇 |
2012年 | 85篇 |
2011年 | 83篇 |
2010年 | 43篇 |
2009年 | 44篇 |
2008年 | 66篇 |
2007年 | 58篇 |
2006年 | 48篇 |
2005年 | 26篇 |
2004年 | 30篇 |
2003年 | 32篇 |
2002年 | 32篇 |
2001年 | 20篇 |
2000年 | 16篇 |
1999年 | 19篇 |
1998年 | 10篇 |
1997年 | 9篇 |
1996年 | 9篇 |
1995年 | 13篇 |
1994年 | 7篇 |
1993年 | 8篇 |
1992年 | 5篇 |
1991年 | 3篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1987年 | 6篇 |
1986年 | 2篇 |
1985年 | 4篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有1194条查询结果,搜索用时 0 毫秒
971.
972.
973.
The AGL6-like Gene CpAGL6, a Potential Regulator of Floral Time and Organ Identity in Wintersweet (Chimonanthus praecox) 总被引:1,自引:0,他引:1
Bei-Guo Wang Qiong Zhang Li-Gang Wang Ke Duan Ai-Hu Pan Xue-Ming Tang Shun-Zhao Sui Ming-Yang Li 《Journal of Plant Growth Regulation》2011,30(3):343-352
Wintersweet (Chimonanthus praecox), a deciduous aromatic shrub endemic to China, has high ornamental value for developing beautiful flowers with strong fragrance.
The transition from the vegetative to the reproductive phase in wintersweet takes 4-5 years. The molecular mechanism regulating
flower development in this basal angiosperm is largely unknown. Here we characterized the molecular features and expression
patterns of the C. praecox
AGL6-like gene CpAGL6 and investigated its potential role in regulating floral time and organ development via ectopic expression in Arabidopsis thaliana. The expression of CpAGL6 is highly tissue-specific, with the highest level in the middle tepals, moderate levels in inner tepals and carpels, and
weak levels in stamen and young leaf tissues. Its dynamic expression in the flower is coincident with tepal opening. Ectopic
expression of CpAGL6 in Arabidopsis retarded the vegetative growth and led to precocious flowering, mainly correlated with the inhibition of the floral repressor
FLC and promotion of the floral promoters AP1 and FT. Although no ectopic floral organs have been observed, transgenic plants exhibited abnormal stamen and carpel development
in later-developing flowers, with fertility reduced to varying degrees. These results suggest that CpAGL6, the AGL6-like gene from the basal angiosperm C. praecox, is a potential E-function regulator involved in specifying floral time and organ identity, functionally homologous to those
AGL6-like genes from higher eudicots and monocots. 相似文献
974.
975.
Zhang X Hufnagel H Markotan T Lanter J Cai C Hou C Singer M Opas E McKenney S Crysler C Johnson D Sui Z 《Bioorganic & medicinal chemistry letters》2011,21(18):5577-5582
A series of 4-azetidinyl-1-aryl-cyclohexanes as potent CCR2 antagonists with high selectivity over activity for the hERG potassium channel is discovered through divergent SARs of CCR2 and hERG. 相似文献
976.
977.
978.
979.
Shu-Zhen Zhao Hong-Zhao Sun Ye Gao Na Sui Bao-Shan Wang 《In vitro cellular & developmental biology. Plant》2011,47(3):391-398
Suaeda salsa calluses cultured in darkness for 28 d were transferred to Murashige and Skoog (MS) media containing various growth regulators
under white light conditions for 10 d to investigate cell growth, betacyanin accumulation, and expression of dopa-4,5-dioxygenase
(DODA). Callus growth was markedly promoted when 0.2 mg·L−1 2,4-D and 0.5 mg·L−1 6-BA were added to the MS medium. Surprisingly, of the auxins tested, IAA had no effect on betacyanin content, but 2,4-D
strongly decreased betacyanin content. Betacyanin content was positively correlated with 6-BA concentrations in the range
of 0.1–2.0 mg·L−1. DODA mRNA levels were consistent with the response of betacyanin content to exogenous growth regulators. These results suggest
that betacyanin metabolism in S. salsa calluses is regulated under white light conditions by growth regulators through the regulation of genes such as DODA that are involved in betacyanin synthesis. 相似文献
980.
Transcriptional programming and functional interactions within the Phytophthora sojae RXLR effector repertoire 总被引:1,自引:0,他引:1