全文获取类型
收费全文 | 183篇 |
免费 | 38篇 |
专业分类
外交国际关系 | 2篇 |
法律 | 192篇 |
中国政治 | 7篇 |
政治理论 | 2篇 |
综合类 | 18篇 |
出版年
2024年 | 2篇 |
2023年 | 7篇 |
2022年 | 6篇 |
2021年 | 7篇 |
2020年 | 11篇 |
2019年 | 8篇 |
2018年 | 11篇 |
2017年 | 12篇 |
2016年 | 10篇 |
2015年 | 5篇 |
2014年 | 17篇 |
2013年 | 14篇 |
2012年 | 13篇 |
2011年 | 21篇 |
2010年 | 17篇 |
2009年 | 10篇 |
2008年 | 14篇 |
2007年 | 8篇 |
2006年 | 13篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 4篇 |
2002年 | 2篇 |
2001年 | 3篇 |
2000年 | 1篇 |
1999年 | 1篇 |
排序方式: 共有221条查询结果,搜索用时 31 毫秒
91.
92.
Yen K Lövblad KO Scheurer E Ozdoba C Thali MJ Aghayev E Jackowski C Anon J Frickey N Zwygart K Weis J Dirnhofer R 《Forensic science international》2007,173(1):21-35
Multislice-computed tomography (MSCT) and magnetic resonance imaging (MRI) are increasingly used for forensic purposes. Based on broad experience in clinical neuroimaging, post-mortem MSCT and MRI were performed in 57 forensic cases with the goal to evaluate the radiological methods concerning their usability for forensic head and brain examination. An experienced clinical radiologist evaluated the imaging data. The results were compared to the autopsy findings that served as the gold standard with regard to common forensic neurotrauma findings such as skull fractures, soft tissue lesions of the scalp, various forms of intracranial hemorrhage or signs of increased brain pressure. The sensitivity of the imaging methods ranged from 100% (e.g., heat-induced alterations, intracranial gas) to zero (e.g., mediobasal impression marks as a sign of increased brain pressure, plaques jaunes). The agreement between MRI and CT was 69%. The radiological methods prevalently failed in the detection of lesions smaller than 3mm of size, whereas they were generally satisfactory concerning the evaluation of intracranial hemorrhage. Due to its advanced 2D and 3D post-processing possibilities, CT in particular possessed certain advantages in comparison with autopsy with regard to forensic reconstruction. MRI showed forensically relevant findings not seen during autopsy in several cases. The partly limited sensitivity of imaging that was observed in this retrospective study was based on several factors: besides general technical limitations it became apparent that clinical radiologists require a sound basic forensic background in order to detect specific signs. Focused teaching sessions will be essential to improve the outcome in future examinations. On the other hand, the autopsy protocols should be further standardized to allow an exact comparison of imaging and autopsy data. In consideration of these facts, MRI and CT have the power to play an important role in future forensic neuropathological examination. 相似文献
93.
贺建平 《西南政法大学学报》1999,(1)
情感在人类活动中有十分重要的作用,在日趋激烈的商业竞争中,商品言行的情感诉求具有特殊的作用与功效:超越文化背景的限制,极易激发心理反应,因模糊朦胧而具有更广泛的诱导性,怀旧情感可引发共鸣。因此,情感诉求已成为决定广告成败的重要原因和条件之一。 相似文献
94.
95.
96.
人工辅助生殖技术的出现导致双轨生殖体制的形成,对传统法律制度提出了挑战,各国纷纷以立法应对。其中最核心的法律问题就是受精胎胚的法律属性问题。各国在理论以及实践中分别作出不同的回答,包括主体说(分为有限自然人说和法人说)、客体说(分为财产说和私生活利益说)以及中介说。其中中介说作为一种最有解释力的理论为多数国家关于人工辅助生殖的立法奉行。采用中介说,是我国民法立法的不二选择。 相似文献
97.
98.
A Systematic Study to Understand the Effects of Particle Size Distribution of Magnetic Fingerprint Powders on Surfaces with Various Porosities
下载免费PDF全文
![点击此处可从《Journal of forensic sciences》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Serkan Gürbüz M.Sc Bahar Özmen Monkul Ph.D. Tuğba İpeksaç M.Eng. Merve Gürtekin Seden Ph.D. Melek Erol Ph.D. 《Journal of forensic sciences》2015,60(3):727-736
This study intends to design magnetite (Fe3O4)‐based magnetic fingerprint powders with different particle size distributions. It also investigates the influence of particle size distribution on the visualization of latent fingermarks with as little background staining as possible on the surfaces with various porosities in a systematic way. Two strategies were used to prepare the magnetic fingerprint formulations for this study: milling of coarse magnetite particles for different durations, and mixing of sieved fine particles with different size ranges with coarse particles. Particle size analyses of the prepared magnetic powders, optical microscopy‐based roughness analysis of the surfaces and SEM measurements of the visualized fingerprints and representative powders were performed. Mag2 of the formulations prepared through milling and Mag5 and Mag6 of the formulations prepared through sieving and mixing were more successful in the development of latent prints than the rest of the solutions. 相似文献
99.
Identification of 2‐(ethylamino)‐1‐(4‐methylphenyl)‐1‐pentanone (4‐MEAP), a New “Legal High” Sold by an Internet Vendor as 4‐Methyl Pentedrone
下载免费PDF全文
![点击此处可从《Journal of forensic sciences》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Danielle Hamby M.Sc. Annessa Burnett B.S. Michael Jablonsky Ph.D. Brendan Twamley Ph.D. Pierce V. Kavanagh Ph.D. Elizabeth A. Gardner Ph.D. 《Journal of forensic sciences》2015,60(3):721-726
Online vendors are offering a new legal high, 4‐methylpentedrone (4‐MPD). Information for potential users provided by internet vendors of 4‐MPD includes incorrect structures and nonexistent CAS numbers. A sample of 4‐MPD was obtained and analyzed using GC‐MS, NMR, and LC‐EIS. The fragmentation data from the GC‐MS and LC‐EIS produced an M‐1 ion that suggested the molecular mass was 219 amu, rather than 205 amu as calculated for 4‐methylpentedrone. The difference in molecular mass corresponded to the addition of a methyl group. Based on the mass and fragmentation pattern, two standards were synthesized, 2‐(ethylamino)‐1‐(4‐methylphenyl)‐1‐pentanone and 1‐(4‐methylphenyl)‐2‐(propylamino)‐1‐butanone. The synthesis involved bromination of the appropriate ketone followed by the reaction with ethylamine or propylamine. Based on the NMR data and unique fragmentation patterns produced by these molecules, the sample was identified as 2‐(ethylamino)‐1‐(4‐methylphenyl)‐1‐pentanone, not 4‐methylpentedrone. 相似文献
100.