全文获取类型
收费全文 | 296篇 |
免费 | 19篇 |
专业分类
各国政治 | 15篇 |
工人农民 | 28篇 |
世界政治 | 21篇 |
外交国际关系 | 8篇 |
法律 | 188篇 |
中国政治 | 3篇 |
政治理论 | 52篇 |
出版年
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 5篇 |
2020年 | 13篇 |
2019年 | 14篇 |
2018年 | 9篇 |
2017年 | 17篇 |
2016年 | 12篇 |
2015年 | 14篇 |
2014年 | 6篇 |
2013年 | 26篇 |
2012年 | 14篇 |
2011年 | 10篇 |
2010年 | 18篇 |
2009年 | 16篇 |
2008年 | 6篇 |
2007年 | 18篇 |
2006年 | 3篇 |
2005年 | 12篇 |
2004年 | 6篇 |
2003年 | 15篇 |
2002年 | 9篇 |
2001年 | 4篇 |
2000年 | 3篇 |
1999年 | 5篇 |
1998年 | 1篇 |
1997年 | 6篇 |
1996年 | 3篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 6篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有315条查询结果,搜索用时 15 毫秒
81.
Sánchez-Diz P Gusmão L Beleza S Benítez-Páez A Castro A García O Solla LP Geada H Martín P Martínez-Jarreta B de Fátima Pinheiro M Raimondi E Silva de la Fuente SM Vide MC Whittle MR Zarrabeitia MT Carracedo A Amorim A;GEP-ISFG 《Forensic science international》2003,135(2):158-162
A collaborative exercise was carried out by the Spanish and Portuguese ISFG Working Group (GEP-ISFG) in order to evaluate the performance of two Y-chromosome STR PCR tetraplexes, which include the loci DYS461, GATA C4, DYS437 and DYS438 (GEPY I), and DYS460, GATA A10, GATA H4 and DYS439 (GEPY II). The participating laboratories were asked to type three samples for the eight markers, using a specific amplification protocol. In addition, two control samples, with known haplotypes, were provided. The results obtained by the 13 different participating laboratories were identical, except for two laboratories that failed to type correctly the same two samples for GATA C4. By sequence analyses, two different GATA C4 allele structures were found. One control sample (allele 21) and two questioned samples (allele 22, correctly typed by all the laboratories, and allele 25) presented the following repeat structure: (TCTA)4(TGTA)2(TCTA)2(TGTA)2(TCTA)n, but different from the one found for allele 26 in one sample included in this exercise, as well as in the second control sample (allele 23), namely (TCTA)4(TGTA)2(TCTA)2(TGTA)2(TCTA)2(TGTA)2(TCTA)n. The collaborative exercise results proved that both Y-tetraplexes produce good amplification results, with the advantage of being efficiently typed using different separation and detection methodologies. However, since GATA C4 repeat presents a complex structure, with alleles differing in sequence structure, efficient denaturing conditions should be followed in order to avoid typing errors due to sizing problems. 相似文献
82.
Women law enforcement officers from New Jersey and Pennsylvania participated in a self-administered anonymous survey. The
objective of this study was to capture the respondent’s attitudes toward work and ascertain their levels of job satisfaction
using Wharton and Barton’s (1991) job satisfaction scales. Their levels of job satisfaction were correlated with the proportion
of women in their respective departments. Using Kanter’s (1977) concept of tokenism, it was found that those women who made
up less than 15% of their department experienced less job satisfaction, greater levels of job-related depression, and lower
self-esteem than those women working in departments where their numbers comprised greater than 15% of their departmental sworn
personnel. 相似文献
83.
Morphometric methods and transmission electron microscopy were used to quantify modifications occurring in the mitochondria of dog myocardium during the first four hours of autolysis. Myocardial fragments were obtained from the outer free wall of the left ventricle, during anesthesia (control-zero) and at 15, 45, 120, and 240 min after cardiac arrest, maintaining the heart "in situ" at 22 degrees C. During the 240 min of autolysis, the main parameters evaluated showed: (a) a decrease in the number of mitochondria from 0.31 to 0.12 per micron 3 of cytoplasm. The decrease over the first 45 min reached 50% of the initial value; (b) an increase in mitochondrial volume, three times greater after the first 45 min (from 0.92 to 2.68 micron 3) and four times greater after 240 min (from 0.92 to 3.79 micron 3); (c) an increase in mitochondrial outer membrane surface area from 5.51 to 12.54 micron 2; (d) an increase in the surface area of individual mitochondria inner membrane and cristae from 27.60 to 56.96 micron 2. The progressive nature of the alterations and the difference in the numerically expressed values allow correlation with the time of somatic death. The authors emphasize the need for further studies in order to complement the present study. 相似文献
84.
85.
86.
Legal and Forensic Medicine is the application of medical knowledge and methodology for the resolution of legal questions and problems for individuals and socie... 相似文献
87.
Crumé Henry Joel Nurius Paula S. Kim Bo-Kyung Elizabeth Logan-Greene Patricia 《Journal of youth and adolescence》2021,50(6):1098-1113
Journal of Youth and Adolescence - Strong school engagement is crucial for school success among adolescents and particularly important for reducing recidivism. Yet, little is known about school... 相似文献
88.
Robert Hornsby C. Wilkinson Mark Galeotti Kelly Hignett Paula Gânga Sow Keat Tok 《欧亚研究》2010,62(3):523-542
89.
90.
Population data for Y-chromosome haplotypes defined by 17 STRs (AmpFlSTR YFiler) in Central Portugal
A.M. Bento V. Lopes H. Afonso Costa F. Balsa M. Carvalho L. Batista D.N. Vieira 《Forensic Science International: Genetics Supplement Series》2008,1(1):179-180
The 17 Y-chromosome STR loci (DYS19, DYS389I, DYS389II, DYS390, DYS456, DYS391, DYS392, DYS393 and DYS385 a/b, DYS458, DYS439, DYS635, GATA H4.1, DYS437, DYS438 and DYS448) were determined for 100 unrelated males, living in Central Portugal, using the AmpFlSTR YFiler PCR Amplification kit (Applied Biosystems).A total of 99 different haplotypes were found, with only two individuals sharing the same haplotype. The overall haplotype diversity (HD) was determined as 0.9998, a value similar to other Y Filer data sets.Y-STR polymorphisms in Central Portugal population, using YFiler, provide a powerful discrimination tool for routine forensic applications. 相似文献