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231.
Bermejo AM López P Alvarez I Tabernero MJ Fernández P 《Forensic science international》2006,156(1):2-8
A method for the simultaneous determination of cocaine (COC) and cocaethylene (CE) in human hair was developed, using solid-phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS) as analytical technique to identify and quantify the drugs. Selected ion monitoring (SIM) mode was used to obtain higher sensitivity. The deuterated-labeled analogues were used as internal standards. The detector response was linear for the drugs studied over the range 0.4-15 ng/mg, with correlation coefficients higher than 0.995. The coefficients of variation oscillated between 0.65% and 14.18% and the accuracy was in the range from 0.73% to 11.20%. The limits of quantitation and detection were found to be acceptable. Finally, this method was applied to 15 hair samples from cocaine users, obtaining positive results in all cases. The mean concentrations were 5.39 ng/mg (range: 0.43-8.98 ng/mg) for cocaine and 1.11 ng/mg (range: 0.42-2.23 ng/mg) for cocaethylene. 相似文献
232.
Dedouit F Otal P Loubes-Lacroix F Rousseau H Costagliola R Telmon N Joffre F Rouge D 《Forensic science international》2006,158(2-3):190-194
A 30-year-old man was admitted with chest trauma after a road traffic accident. The patient was paraplegic and suffered from transient monoparesia of the left arm. The chest X-ray revealed a severe right tension pneumothorax and thoracic spine fractures. Emergency right thoracic drainage was carried out followed by angiography. Unfortunately the patient died and an autopsy was not permitted. Consequently post-mortem multi-slice computed tomography (MSCT) was performed, revealing presence of air inside the right cerebral arteries, bilateral pneumothorax accompanied by a severe right tension pneumothorax, bilateral haematic pleural effusion, pneumomediastinum and bilateral lung contusions. Air was also observed within the right coronary artery, ascending aorta and right ventricle. Thoracic and cervical spinal epidural emphysema were diagnosed. Venous air embolism followed by arterial air embolism producing paradoxical embolism was diagnosed. To the best of our knowledge, this is the first case illustrating by post-mortem MSCT such simultaneous complications after chest trauma as spinal epidural emphysema and cerebral and coronary air embolism. 相似文献
233.
234.
Fanton L Bévalot F Schoendorff P Lalliard S Jdeed K Malicier D 《The American journal of forensic medicine and pathology》2007,28(3):262-266
A prospective study of 161 victims of falls from height is reported. The aim was to determine the interest of systematic qualitative and quantitative toxicological analysis in such fatalities. The primary cause of death was suicide (84.5%), followed by accidents (7%) and homicide (1%). In the remaining 7.5%, cause of death was undetermined. In the suicides, there was evidence of psychotropic medicines in 57% of the observations, with a much higher proportion of benzodiazepines and antidepressants in women than in men. Quantitative toxicologic analysis showed overdosing on medication in 16 suicide victims, with toxic levels in 11 of these. Systematic qualitative and quantitative toxicologic analysis made a significant contribution to the diagnosis of suicide by revealing either an unknown psychiatric treatment or a toxic level. 相似文献
235.
Rodríguez A Arrieta G Sanóu I Vargas MC García O Yurrebaso I Pérez JA Villalta M Espinoza M 《Forensic science international》2007,168(1):85-88
Allele frequencies for 18 STR autosomal loci (D3S1358, VWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317, D7S820, D16S539, TH01, TPOX, CSF1PO, Penta D, Penta E, D19S433, D2S1338 and SE33) were obtained from a sample of 191-500 unrelated individuals from Costa Rica, Central America. 相似文献
236.
Lock E Aalberg L Andersson K Dahlén J Cole MD Finnon Y Huizer H Jalava K Kaa E Lopes A Poortman-van der Meer A Sippola E 《Forensic science international》2007,169(1):77-85
This paper is the fifth in a series of six in relation to the development of a harmonised method for the profiling of amphetamine [L. Aalberg, K. Andersson, C. Bertler, H. Borén, M.D. Cole, J. Dahlén, Y. Finnon, H. Huizer, K. Jalava, E. Kaa, E. Lock, A. Lopes, A. Poortman-van der Meer, E. Sippola, Development of a harmonised method for the profiling of amphetamines I. Synthesis of standards and compilation of analytical data, Forensic Sci. Int. 149 (2005) 219-229; L. Aalberg, K. Andersson, C. Bertler, M.D. Cole, Y. Finnon, H. Huizer, K. Jalava, E. Kaa, E. Lock, A. Lopes, A. Poortman-van der Meer, E. Sippola, J. Dahlén, Development of a harmonised method for the profiling of amphetamines II. Stability of impurities in organic solvents, Forensic Sci. Int. 149 (2005) 231-241]. The third paper [K. Andersson, K. Jalava, E. Lock, L. Aalberg, Y. Finnon, H. Huizer, E. Kaa, A. Lopes, A. Poortman-van der Meer, M.D. Cole, J. Dahlén, E. Sippola, Development of a harmonised method for the profiling of amphetamines III. Development of the gas chromatographic method, Forensic Sci. Int., in press] dealt with the optimisation of the gas chromatographic and detection methods whereas the fourth paper [K. Andersson, K. Jalava, E. Lock, Y. Finnon, S. Stevenson, L. Aalberg, H. Huizer, E. Kaa, A. Lopes, A. Poortman-van der Meer, M.D. Cole, J. Dahlén, E. Sippola, Development of a harmonised method for the profiling of amphetamines IV. Optimisation of sample preparation, Forensic Sci. Int., in press] concerned the optimisation of the extraction method prior to GC analysis. This paper is a study of the optimised method in order to determine its stability. Investigations of within and between day variations were carried out in four laboratories. Moreover, variations between laboratories were also determined. Both flame ionisation detector (FID) and MS detection were used. One laboratory studied nitrogen-phosphorous detector (NPD) detection as well. For this task, 12 batches of amphetamine were prepared. Six of them were synthesised via the Leuckart route, three via the nitrostyrene route and three via the reductive amination route [A.M.A. Verweij, Impurities in illicit drug preparations: amphetamine and methamphetamine, Forensic Sci. Rev. 1 (1989) 2-11]. Taking into account all studied target compounds and the average results from four laboratories, the within day variation was around 6% for FID and 5% for MS, the between days variation was around 10% for FID and 8% for MS. For NPD detection, within day variation was 5% and between days variation 9% (only one laboratory). Finally, the inter-laboratory variation was about 12% for FID (four laboratories) and 10% for MS (three laboratories). 相似文献
237.
Consultation of scientific evidence by policy actors has been the foci of attention of knowledge utilization scholars for decades. The present study questioned the extent to which randomized controlled trials (RCTs)—generally seen as the gold standard of scientific research—are known and consulted by policy analysts in ministerial settings. Using cross‐sectional data collected in 17 ministries in Québec (Canada), our study showed that fairly high levels of policy analysts report never having heard of RCTs, thus possibly hindering effective communication of scientific results to relevant policy makers. Statistical analyses reveal the importance of cognitive factors in explaining both phenomena. 相似文献
238.
It is common wisdom that public sector wages are not determined in the same way as private sector wages. At the same time, the empirical evidence available for OECD countries finds a strong positive correlation between public and private sector wages. In this paper, we develop a model that is consistent with a political economy view of the determination of public sector wages and employment, while being consistent with the said empirical evidence. Public finance constraints are crucial: In booms, governments expand employment and wages, while in downturns, lack of tax revenues forces the government to cut back the wage bill. 相似文献
239.
Andrés J Picazo-Tadeo Francisco González-Gómez Jorge Guardiola Wanden-Berghe Alberto Ruiz-Villaverde 《Public Choice》2012,151(1-2):215-228
This paper studies the influence of ideology and political motives on the choice of management for urban water services. Our contribution is two-fold. Firstly, we use a considerably more detailed set of variables to represent ideological and political motives than previous research. Secondly, the variables that explain local politicians’ decisions are observed at the time decision-making occurs, rather than at a later date. Beyond pragmatic reasons, we find that ideological and political motives also matter when explaining decisions regarding the management of water services. Furthermore, considering the time dimension of decision-making noticeably improves the explanatory power of our model. 相似文献
240.
Cognitive biases are heuristics that shape individual preferences and decisions in a way that is at odds with means‐end rationality. The effects of cognitive biases on governing are underexplored. The authors study how election administrators’ cognitive biases shape their preferences for e‐voting technology using data from a national survey of local election officials. The technology acceptance model, which employs a rational, means‐end perspective, suggests that the perceived benefits of e‐voting machines explain their popularity. But findings indicate that cognitive biases also play a role, even after controlling for the perceived benefits and costs of the technology. The findings point to a novel cognitive bias that is of particular interest to research on e‐government: officials who have a general faith in technology are attracted to more innovative alternatives. The authors also find that local election officials who prefer e‐voting machines do so in part because they overvalue the technology they already possess and because they are overly confident in their own judgment. 相似文献