全文获取类型
收费全文 | 364篇 |
免费 | 18篇 |
出版年
2023年 | 3篇 |
2022年 | 4篇 |
2021年 | 17篇 |
2020年 | 8篇 |
2019年 | 6篇 |
2018年 | 23篇 |
2017年 | 11篇 |
2016年 | 19篇 |
2015年 | 24篇 |
2014年 | 20篇 |
2013年 | 29篇 |
2012年 | 28篇 |
2011年 | 25篇 |
2010年 | 20篇 |
2009年 | 13篇 |
2008年 | 18篇 |
2007年 | 24篇 |
2006年 | 24篇 |
2005年 | 13篇 |
2004年 | 18篇 |
2003年 | 7篇 |
2002年 | 9篇 |
2001年 | 4篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1987年 | 1篇 |
1984年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有382条查询结果,搜索用时 31 毫秒
381.
Manoel L Costa Claudia S Mermelstein Maira M Fróes Carlos Chagas Vivaldo Moura Neto 《Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology》1998,119(4):715-719
Desmin, the intermediate filament protein of muscle, is present in the electric organs of Electrophorus electricus L. as five isovariants, instead of the one to two isovariants found in muscle. We analyzed the isodesmin pattern in the three different electric organs using densitometry of Coomassie blue-stained bands in electrofocusing polyacrylamide gel electrophoresis. We were able to compare the relative amount of each of the five desmin isovariants in an isodesmin pattern characteristic of each electric organ. These patterns proved to be, in some cases, statistically different. Desmin in each electric organ could have slightly different functions in order to correlate with the organ-specific isovariant patterns. 相似文献
382.
Maria Conceição M. Torres João Carlos Assunção Gilvandete Maria P. Santiago Manoel Andrade‐Neto Edilberto R. Silveira Leticia V. Costa‐Lotufo Daniel P. Bezerra José Delano B. Marinho Filho Francisco Arnaldo Viana Otília Deusdênia L. Pessoa 《化学与生物多样性》2008,5(12):2724-2728
The chemical composition of the leaf essential oil of Croton regelianus collected from wild plants growing in two different sites at Ceará State (Brazil) was analyzed by GC/MS and GC‐FID. Twenty monoterpenoids, representing more than 96% of the chemical composition of the oils, were identified and quantified. The oils showed similar chemical composition but considerable variation in the levels of each constituent. Ascaridole (33.9–17.0%), p‐cymene (22.3–21.6%), and camphor (13.0–3.1%) were the predominant constituents. The monoterpene ascaridole was isolated and characterized by spectroscopic data. The essential oils and the isolated compounds were tested against Aedes aegypti and Artemia sp. larvae, and the root knot nematode Meloidogyne incognita. The bioassay results show that the essential oil of C. regelianus and ascaridole were moderately active against the M. incognita, but strongly effective against both A. aegypti and Artemia sp. larvae. 相似文献