全文获取类型
收费全文 | 874291篇 |
免费 | 103671篇 |
国内免费 | 892篇 |
出版年
2018年 | 7584篇 |
2016年 | 10240篇 |
2015年 | 14668篇 |
2014年 | 17300篇 |
2013年 | 24106篇 |
2012年 | 27406篇 |
2011年 | 27857篇 |
2010年 | 18543篇 |
2009年 | 17154篇 |
2008年 | 24677篇 |
2007年 | 25688篇 |
2006年 | 24118篇 |
2005年 | 23215篇 |
2004年 | 23078篇 |
2003年 | 21965篇 |
2002年 | 21220篇 |
2001年 | 36071篇 |
2000年 | 36369篇 |
1999年 | 29264篇 |
1998年 | 11058篇 |
1997年 | 11295篇 |
1996年 | 10792篇 |
1995年 | 10363篇 |
1994年 | 10062篇 |
1993年 | 10059篇 |
1992年 | 25151篇 |
1991年 | 24933篇 |
1990年 | 24489篇 |
1989年 | 23750篇 |
1988年 | 22169篇 |
1987年 | 21186篇 |
1986年 | 19987篇 |
1985年 | 20103篇 |
1984年 | 16822篇 |
1983年 | 14725篇 |
1982年 | 11261篇 |
1981年 | 10541篇 |
1980年 | 9821篇 |
1979年 | 16331篇 |
1978年 | 13026篇 |
1977年 | 11778篇 |
1976年 | 11176篇 |
1975年 | 12601篇 |
1974年 | 13450篇 |
1973年 | 13071篇 |
1972年 | 12110篇 |
1971年 | 10887篇 |
1970年 | 9376篇 |
1969年 | 9000篇 |
1968年 | 8225篇 |
排序方式: 共有10000条查询结果,搜索用时 250 毫秒
931.
M Janowski L Baugnet-Mahiec J Merregaert L de Saint-Georges A Sassen J N Ihle J R Maisin 《Comptes rendus des séances de la Société de biologie et de ses filiales》1980,174(5):832-839
Two distinct rat propagates of a radiation leukemia virus (RadLV-Rs) from the C57BL mouse respectively induced characteristic leukemogenic effects. These were found to be related with the infection titers of the isolates, but not with either their antigenic specificities or their viral and proviral genome sequences. 相似文献
932.
On the measurement of growth with applications to the modelling and analysis of plant growth 总被引:3,自引:0,他引:3
M. L. Roderick 《Functional ecology》2000,14(2):244-251
933.
934.
935.
936.
V. v. Borbás P. L. Wiedermann Franz Hüfer E. Hackel 《Plant Systematics and Evolution》1890,40(11):427-428
Ohne Zusammenfassung 相似文献
937.
Treatment of cut-throat trout broodfish Salmo clarki (Richardson) with Sulphamerazine at 220 mg/kg (10 g/100 1b) of fish/day for 14 days resulted in severe kidney histopathology and increased mortality among males. Experimental data presented showed that cut-throat trout broodfish were extremely sensitive to Sulphamerazine toxicity. Hydropic degeneration of renal tubule epithelium and haemorrhage into tubule lumens were observed in kidneys of both male and female trout, but was more severe in the former. Death, which occurred only in males, was correlated with spawning stress and impaired renal function. 相似文献
938.
939.
940.
Brunner RM Srikanchai T Murani E Wimmers K Ponsuksili S 《Molecular biology reports》2012,39(1):97-107
Six genes that were known to exhibit expression levels that are correlated to drip loss BVES, SLC3A2, ZDHHC5, CS, COQ9, and
EGFR have been for candidate gene analysis. Based on in silico analysis SNPs were detected, confirmed by sequencing, and used for genotyping. The SNPs were genotyped in about 1,800 animals
from six pig populations including commercial herds of Pietrain (PI) and German Landrace (DL), different commercial herds
of Pietrain × (German Large White × German Landrace) (PIF1(a/b/c)), and one experimental F2-population Duroc × Pietrain (DUPI). Comparative and genetic mapping established the location of BVES on SSC1, of SLC3A2 and
ZDHHC5 on SSC2, of CS on SSC5, of COQ9 on SSC6 and of EGFR on SSC9, respectively, coinciding with QTL regions for carcass
and meat quality traits. BVES, SLC3A2, and CS revealed association at least with drip loss and with several other measures
of water holding capacity (WHC). Moreover, COQ9 and EGFR were associated with several meat quality traits such as meat color
and/or thawing loss. This study reveals statistic evidence in addition to the functional relationship of these genes to WHC
previously evidenced by expression analysis. This study reveals positional and genetic statistical evidence for a link of
genetic variation at these loci or close to them and promotes those six candidate genes as functional and/or positional candidate
genes for meat quality traits. 相似文献