全文获取类型
收费全文 | 296篇 |
免费 | 44篇 |
国内免费 | 1篇 |
出版年
2023年 | 2篇 |
2022年 | 4篇 |
2019年 | 4篇 |
2017年 | 4篇 |
2016年 | 4篇 |
2015年 | 8篇 |
2014年 | 6篇 |
2013年 | 8篇 |
2012年 | 13篇 |
2011年 | 17篇 |
2010年 | 11篇 |
2009年 | 5篇 |
2008年 | 13篇 |
2007年 | 19篇 |
2006年 | 11篇 |
2005年 | 17篇 |
2004年 | 26篇 |
2003年 | 18篇 |
2002年 | 11篇 |
2001年 | 12篇 |
2000年 | 9篇 |
1999年 | 5篇 |
1998年 | 2篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 4篇 |
1992年 | 9篇 |
1991年 | 6篇 |
1990年 | 10篇 |
1989年 | 4篇 |
1988年 | 5篇 |
1987年 | 5篇 |
1986年 | 8篇 |
1985年 | 4篇 |
1984年 | 5篇 |
1981年 | 5篇 |
1979年 | 2篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1974年 | 4篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1968年 | 2篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有341条查询结果,搜索用时 16 毫秒
331.
332.
Mariko Nakamura Hidechika Okada Hiroyuki Sasaki Kiyotsugu Yoshida Minori Kamada Noriko Okada Masaki Terada Tsuneya Ohno 《Microbiology and immunology》1996,40(8):561-567
Previous studies have demonstrated that the murine monoclonal antibody (MoAb) NM-01 activates the human complement classical pathway resulting in lysis of human immunodeficiency virus (HIV). The present study was performed to determine the availability of the V3-loop of gp120 relative to the complement regulatory proteins, CD55 (DAF) and CD59 (HRF20) molecules on HIV. The results demonstrate that CD55 and CD59 exist on HIV virions, along with gp120 molecules. These findings suggest that activation of human complement on free viral particles is induced by MoAb NM-01 and that this occurs regardless of the presence of CD55 and CD59 molecules. The destruction of viral particles was demonstrated by a decrease in infectivity. The involvement of human complement in this process was confirmed with an immunoelectron microscopy technique by the presence of a human C9 to prove membrane attack complex (MAC). The results indicate that NM-01 can induce complement activation because of the ratios of CD55 and CD59 to gp120 molecules on HIV virions. The availability of the gp120 V3 domain on the virion is sufficient for binding of NM-01 and thereby the formation of MAC that results in virolysis. 相似文献
333.
334.
335.
Hideaki Kobayashi Ryou Sasahara Shoichi Yoda 《Bioscience, biotechnology, and biochemistry》2017,81(6):1206-1215
The flavor deterioration of mayonnaise is induced by iron, which is released from egg yolk phosvitin under acidic conditions and promotes lipid oxidation. To prevent oxidative deterioration, natural components, rather than synthetic chemicals such as ethylenediaminetetraacetic acid have been required by consumers. In the present study, we evaluated the inhibitory effects of three egg white components with the same amino acid composition, namely egg white protein, hydrolysate, and the amino acid mixture, on lipid oxidation in mayonnaise and an acidic egg yolk solution as a model system. We found that the hydrolysate had the strongest inhibitory effect on lipid oxidation among the three components. The mechanism underlying the antioxidant effect was associated with Fe2+-chelating activity. Thus, egg white hydrolysate may have the potential as natural inhibitors of lipid oxidation in mayonnaise. 相似文献
336.
Geographical variation in body size of a pelagic seabird,the streaked shearwater Calonectris leucomelas
下载免费PDF全文
![点击此处可从《Journal of Biogeography》网站下载免费的PDF全文](/ch/ext_images/free.gif)
337.
338.
339.
The species composition and density of seeds in the soil of a climax evergeen oak forest in the Kasugayama Forest Reserve,
Nara, Japan were studied by directly extracting seeds from soil samples and using soil samples in planting boxes as the basis
of germination tests.
A total of 33 species were identified from all seeds collected in 6 stands: 11 evergreen broadleaf, 15 deciduous broadleaf,
2 coniferous, 2 liana, 1 herb, and 2 grass species. Species producing sap fruits and dry fruits accounted for 60% and 40%
of the total number of species, respectively. The species composition of all the seeds was independent of the species composition
of the forest vegetation. The mean density of the seeds was 22,134 seeds/m2·5 cm.Eurya japonica, of which seeds were found in all soil samples, was the most abundant species, followed byCryptomeria japonica, Ilex micrococca, andBoehmeria longispica. Pioneer species such asMallotus japonicus, Zanthoxylum ailanthoides, andAralia elata were found in all soil samples in spite of the paucity of adult trees in the forest. Seeds of evergreen oaks were relatively
aboundant but no viable seeds were found. ViableE. japonica, I. micrococca, Symplocos prunifolia, andB. longispica seeds were abundant. 相似文献
340.
Transfer of heme from mitochondria in rat liver cells 总被引:7,自引:0,他引:7