首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   5184篇
  免费   50篇
各国政治   175篇
工人农民   53篇
世界政治   818篇
外交国际关系   469篇
法律   2993篇
中国共产党   72篇
中国政治   225篇
政治理论   349篇
综合类   80篇
  2021年   26篇
  2018年   22篇
  2016年   16篇
  2015年   21篇
  2014年   110篇
  2013年   30篇
  2012年   346篇
  2011年   325篇
  2010年   113篇
  2009年   111篇
  2008年   336篇
  2007年   383篇
  2006年   366篇
  2005年   381篇
  2004年   299篇
  2003年   286篇
  2002年   304篇
  2001年   238篇
  2000年   277篇
  1999年   116篇
  1998年   35篇
  1997年   35篇
  1996年   45篇
  1995年   34篇
  1994年   46篇
  1993年   26篇
  1992年   32篇
  1991年   41篇
  1990年   28篇
  1989年   20篇
  1988年   111篇
  1987年   30篇
  1986年   29篇
  1985年   31篇
  1984年   36篇
  1983年   35篇
  1982年   28篇
  1981年   39篇
  1980年   40篇
  1979年   35篇
  1978年   16篇
  1977年   44篇
  1976年   34篇
  1973年   14篇
  1964年   27篇
  1963年   25篇
  1962年   41篇
  1961年   18篇
  1960年   22篇
  1959年   29篇
排序方式: 共有5234条查询结果,搜索用时 31 毫秒
961.
We have firstly presented a case using post mortem corrosive method in forensic medical practice after coronary stent implantation. Occlusions, fate of side branches could be detected during the clinical diagnostic angiography, intravascular ultrasound, computed tomography; however, the forensic medical determination of cause of death, identification of complications needs a careful post-mortem investigation. The injection-corrosive method seems to be a useful assistance in the characterisation of pathomorphological changes after stent implantation. Besides the classical techniques of histology, immunohistochemistry, electron microscopic investigation we have introduced a new synthetic resin corrosion cast method. This three-dimensional corrosion cast preparation may provide new data about the actual morphological condition of the coronary vessels and a better understanding of the pathomechanisms of sudden cardiac death after percutaneous coronary intervention.  相似文献   
962.
Superwarfarin exposure is a growing health problem, described in many countries. The authors report a case of suspicious chlorophacinone poisoning with a problematic diagnosis. They review the literature and discuss particularities of anticoagulant rodenticide intoxication, as well as the apparent contradiction between anticoagulant intoxication and lethal thrombosis.  相似文献   
963.
The allele frequency distribution of 15 short tandem repeats (STR) loci contained in the AmpFlSTR Identifiler PCR Amplification Kit (Applied Biosystems), was determined in two Berber populations from Asni and Bouhria, in Central and Eastern Morocco, respectively. A total of 209 individuals were typed. No deviations from the Hardy-Weinberg equilibrium were observed for Asni at the 15 STRs loci whereas for the Bouhria samples, two loci (D5S818 and TH01) showed significant departures from Hardy-Weinberg expectations (after Bonferroni's correction). All loci are highly polymorphic and population differentiation tests showed that the Moroccan samples from Asni and Bouhria have significant differences in 4 out of 15 loci (D21S11, D7S820, D16S539 and TPOX). The aim of the study was to obtain accurate allele frequencies relevant for forensic applications. Comparative analyses between our population data and other population samples gathered from the literature are also presented.  相似文献   
964.
A sharp increase in forensic age estimation of living persons has been observed in recent years. However, ethnic populations residing in different countries have been insufficiently analyzed. According to 2004 data compiled by the Essen-based Turkey Research Center, there are 3.8 million Turkish people living abroad, and 3.2 million of them reside in European Union countries. Despite the high number of Turks living abroad, little is known about third-molar development for forensic application in this population. Hence, it was considered worthwhile to determine the developmental stages of the third molar in a group of Turkish population, to assess chronological age estimation based on the developmental stages, and to compare third molar development according to sex, age and location. Orthopantomograms of 1134 Turkish patients, ages 4-20 years were examined and third-molar developmental stages were evaluated based on Demirjian's classifications. Orthopantomograms were scored by two different observers, and Wilcoxon matched-pairs signed-ranks test used to test intra- and inter-observer reliability revealed a strong agreement between both intra- and inter-observer measurements. Linear regression analysis was performed to correlate third-molar development and chronological age, and further statistical analysis was performed to determine the relation between sex, age and location. Results showed a strong linear correlation between age and molar development (males: r(2)=0.57; females: r(2)=0.56). Mineralizations of left and right third molars were compared using Wilcoxon tests, and no statistical differences were found. No significant differences were found in third-molar development between males and females. Mandibular third molar crypt formation was observed in 2.4% of patients at age seven and maxillary third molar crypt formation was observed in 1.3% of patients at age seven. A strong correlation was found between third-molar development and chronological age. Among the Turkish population, third molar crypt formation is observable at as early as 7 years in both the mandible and maxilla. Agenesis can be determined conclusively if no radiolucent bud is present by age 14.  相似文献   
965.
The polymorphism of 15 STR loci has been studied in a population sample of 193 healthy unrelated individuals from the population of Duzce, a city in the northwestern Turkey. The most valuable loci, from forensic point of view according to their power of discrimination values, were D2S1338, D18S51, FGA, and D19S433 where CSF1PO appeared to be the least powerful one. From paternity point of view, FGA, D21S11 were found to be the loci with highest exclusion value whereas D3S1358 and TPOX were the locus with the lowest exclusion.  相似文献   
966.
Allele frequencies for the 15 tetranucleotide short tandem repeat loci contained in the AmpFlSTR Identifiler kit were obtained from a population sample of 219 unrelated individuals born in the western part of Romania.  相似文献   
967.
968.
969.
This study describes the frequency of mole guns in Turkey by examining the cases sent to the Council of Forensic Medicine of Turkey between 2003 and 2005. In total, 11 mole guns were examined. Mole guns are manufactured to be used as a trap against detrimental animals. Although they are not meant to be used as a firearm, they are able to cause death. Mole guns appearing in regular casework were evaluated in terms of type of the gun, number of barrels, size and caliber, rifling, design, mechanism, fitness for use, legality, and geographical distribution. Ninety-one percent of the guns were 12 gauge. Most commonly they originate from Inner Anatolia. Mole guns are typically handmade. Some examples of injuries and deaths caused by mole guns are also offered.  相似文献   
970.
The body of an unidentified elderly woman was found trapped in a floodgate. Prior to autopsy, full-body multislice computed tomography (MSCT) was performed for study of bone lesions and cause of death. Age was estimated by analysis of the sternal end of the fourth rib and of the pubic symphyseal medial articular surfaces. The results were then compared with the autopsy findings. MSCT was superior to autopsy in diagnosis of traumatic bone lesions and also revealed dental anomalies and signs of drowning. Age estimation gave a similar result for both methods. This case report illustrates the potential value of MSCT for medico-legal investigations of death: diagnosis of injuries, possibility of determining the cause of death, and anthropological study in order to estimate age or to visualize features likely to enable identification of a corpse.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号