全文获取类型
收费全文 | 671篇 |
免费 | 41篇 |
国内免费 | 1篇 |
出版年
2024年 | 1篇 |
2023年 | 5篇 |
2022年 | 13篇 |
2021年 | 16篇 |
2020年 | 17篇 |
2019年 | 15篇 |
2018年 | 19篇 |
2017年 | 28篇 |
2016年 | 29篇 |
2015年 | 39篇 |
2014年 | 43篇 |
2013年 | 36篇 |
2012年 | 57篇 |
2011年 | 47篇 |
2010年 | 37篇 |
2009年 | 28篇 |
2008年 | 30篇 |
2007年 | 40篇 |
2006年 | 37篇 |
2005年 | 24篇 |
2004年 | 30篇 |
2003年 | 29篇 |
2002年 | 28篇 |
2001年 | 4篇 |
2000年 | 3篇 |
1999年 | 12篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1994年 | 2篇 |
1993年 | 7篇 |
1992年 | 6篇 |
1991年 | 2篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1978年 | 3篇 |
1975年 | 3篇 |
1974年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有713条查询结果,搜索用时 16 毫秒
701.
702.
703.
Irina N. Dolganova Arsen K. Zotov Larisa P. Safonova Polina V. Aleksandrova Igor V. Reshetov Kirill I. Zaytsev Valery V. Tuchin Vladimir N. Kurlov 《Journal of biophotonics》2023,16(3):e202200288
This article describes a sapphire cryoprobe as a promising solution to the significant problem of modern cryosurgery that is the monitoring of tissue freezing. This probe consists of a sapphire rod manufactured by the edge-defined film-fed growth technique from Al2O3 melt and optical fibers accommodated inside the rod and connected to the source and the detector. The probe's design enables detection of spatially resolved diffuse reflected intensities of tissue optical response, which are used for the estimation of tissue freezing depth. The current type of the 12.5-mm diameter sapphire probe cooled down by the liquid nitrogen assumes a superficial cryoablation. The experimental test made by using a gelatin-intralipid tissue phantom shows the feasibility of such concept, revealing the capabilities of monitoring the freezing depth up to 10 mm by the particular instrumentation realization of the probe. This justifies a potential of sapphire-based instruments aided by optical diagnosis in modern cryosurgery. 相似文献
704.
Y. Z. Ghendon V. P. Ginsburg G. Y. Soloviev Larisa Babushkina 《Journal of virology》1969,3(3):351-352
Ribonucleic acid (RNA) synthesis of chick embryo fibroblasts was inhibited by two members of the myxovirus group, Newcastle disease virus (NDV) and fowl plague virus. It was also found that cellular deoxyribonucleic acid-dependent RNA polymerase was inhibited by a cytoplasmic factor induced by NDV infection. 相似文献
705.
706.
707.
708.
709.
E. B. Melnikova 《Inland Water Biology》2018,11(3):286-291
This paper analyzes interannual variations in the bioluminescence field intensity in nearshore relatively deep outside waters and in an enclosed shallow-water bay from 2009 to 2014; it presents analytical expressions of the interannual trends and reveals the 1.4- to 2.7-time decrease in the interannual bioluminescence field intensity over the studied period. 相似文献
710.
Marine bacteria from aquaculture areas with industrial use of quinolones have the potential to pass quinolone resistance genes to animal and human pathogens. The VPA0095 gene, related to the quinolone resistance determinant qnrA, from clinical isolates of epidemic Vibrio parahaemolyticus conferred reduced susceptibility to quinolone after cloning into Escherichia coli K-12 either when acting alone or synergistically with DNA gyrase mutations. In addition, a plasmid-mediated quinolone resistance gene from marine bacteria, aac(6′)-Ib-cr, was identical to aac(6′)-Ib-cr from urinary tract isolates of E. coli, suggesting a recent flow of this gene between these bacteria isolated from different environments. aac(6′)-Ib-cr from E. coli also conferred reduced susceptibility to quinolone and kanamycin when cloned into E. coli K-12. 相似文献