全文获取类型
收费全文 | 110篇 |
免费 | 0篇 |
国内免费 | 4篇 |
专业分类
系统科学 | 3篇 |
现状及发展 | 25篇 |
研究方法 | 13篇 |
综合类 | 68篇 |
自然研究 | 5篇 |
出版年
2018年 | 1篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2013年 | 3篇 |
2012年 | 5篇 |
2011年 | 6篇 |
2010年 | 3篇 |
2008年 | 6篇 |
2007年 | 10篇 |
2006年 | 8篇 |
2005年 | 7篇 |
2004年 | 2篇 |
2003年 | 5篇 |
2002年 | 5篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1997年 | 2篇 |
1992年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1974年 | 1篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1971年 | 1篇 |
1970年 | 4篇 |
1969年 | 1篇 |
1968年 | 5篇 |
1967年 | 2篇 |
1966年 | 3篇 |
1957年 | 1篇 |
排序方式: 共有114条查询结果,搜索用时 109 毫秒
101.
Hashibe M McKay JD Curado MP Oliveira JC Koifman S Koifman R Zaridze D Shangina O Wünsch-Filho V Eluf-Neto J Levi JE Matos E Lagiou P Lagiou A Benhamou S Bouchardy C Szeszenia-Dabrowska N Menezes A Dall'Agnol MM Merletti F Richiardi L Fernandez L Lence J Talamini R Barzan L Mates D Mates IN Kjaerheim K Macfarlane GJ Macfarlane TV Simonato L Canova C Holcátová I Agudo A Castellsagué X Lowry R Janout V Kollarova H Conway DI McKinney PA Znaor A Fabianova E Bencko V Lissowska J Chabrier A Hung RJ 《Nature genetics》2008,40(6):707-709
Alcohol is an important risk factor for upper aerodigestive cancers and is principally metabolized by alcohol dehydrogenase (ADH) enzymes. We have investigated six ADH genetic variants in over 3,800 aerodigestive cancer cases and 5,200 controls from three individual studies. Gene variants rs1229984 (ADH1B) and rs1573496 (ADH7) were significantly protective against aerodigestive cancer in each individual study and overall (P = 10(-10) and 10(-9), respectively). These effects became more apparent with increasing alcohol consumption (P for trend = 0.0002 and 0.065, respectively). Both gene effects were independent of each other, implying that multiple ADH genes may be involved in upper aerodigestive cancer etiology. 相似文献
102.
Cyclic GMP and cell movement 总被引:32,自引:0,他引:32
103.
Serological demonstration of H-Y (male) antigen on mouse sperm 总被引:20,自引:0,他引:20
104.
105.
106.
M Goldberg D Genotelle-Septier 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1977,284(2):127-130
Dissociative methods are commonly used to extract proteoglycans. With a 2 M CaCl2 solution these components can be also extracted from thin sections of fixed, "Epon" included material. Secretory granules of the chondrocytes, granular components of extracellular matrix as matrix vesicles lost their electron density. Glycoproteins of the cell coat as non collagenous glycoproteins disappear. The method seems to be valuable for extracting proteoglycans from thin sections prepared for electron microscope investigations. 相似文献
107.
Stephen R. Goldberg Charles R. Bursey Keith B. Malmos Brian K. Sullivan Hay Cheam 《西北部美国博物学家》2011,56(4)
The gastrointestinal tracts, lungs and urinary bladders from 77 Bufo microscaphus , 61 Bufo woodhousii , and 8 of their hybrids were examined for helminthes. One species of trematode ( Glypthelmins quieta ), 1 species of cestode ( Distoichometra bufonis ), and 5 species of nematodes ( Aplectana incerta, A. itzocanensis, Rhabdias americanus, Physaloptera sp., and Physocephalus sp.) were found. The greatest prevalence (41%) and mean intensity (231.7) were recorded for Aplectana incerta in Bufo woodhousii . It appears hybrids harbor fewer parasites than either parent species. 相似文献
108.
109.
110.
Mutations in HFE2 cause iron overload in chromosome 1q-linked juvenile hemochromatosis 总被引:27,自引:0,他引:27
Papanikolaou G Samuels ME Ludwig EH MacDonald ML Franchini PL Dubé MP Andres L MacFarlane J Sakellaropoulos N Politou M Nemeth E Thompson J Risler JK Zaborowska C Babakaiff R Radomski CC Pape TD Davidas O Christakis J Brissot P Lockitch G Ganz T Hayden MR Goldberg YP 《Nature genetics》2004,36(1):77-82