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31.
David A. DeTata M.F.Sc. Peter A. Collins B.Sc. Allan J. McKinley Ph.D. 《Journal of forensic sciences》2013,58(2):500-507
The use of an organic solvent to extract explosive residues from hand swabs and postblast debris inevitably leads to the coextraction of unwanted materials, usually in far greater quantities than any explosive residue. In this study, the extraction efficiency of a number of solvent cleanup procedures including solid‐phase extraction (SPE), adsorbent resins such as Chromosorb‐104, and traditional materials such as silica and Florisil was calculated using a quantitative liquid chromatography–ultraviolet (LC‐UV) detection procedure. The Oasis® HLB cartridge outperformed other cleanup procedures, with analyte recoveries approaching 95%, while the Amberlite XAD‐7 procedure returned the lowest overall recoveries. The matrix rejection ability of each method was then determined using a simulated highly contaminated matrix, with the adsorbent resins showing a higher degree of matrix rejection, which is seen as a reduction in background noise in the UV chromatogram using 210 nm detection. 相似文献
32.
David A. DeTata M.F.Sc. Peter A. Collins B.Sc. Allan J. McKinley Ph.D. 《Journal of forensic sciences》2013,58(3):757-763
The efficiency of solvent based extraction methods used to remove explosive residues from four different swab types was investigated. Known amounts of organic and inorganic residues were spiked onto a swab surface with acetonitrile or ethanol:water combined with ultrasonication or physical manipulation used to extract the residues from each swab. The efficiency of each procedure was then calculated using liquid chromatography‐ultraviolet detection for organic residues and ion chromatography for inorganic residues. Results indicated that acetonitrile combined with physical agitation proved to be the most efficient method; returning analyte recoveries c. 95% for both alcohol based swabs and cotton balls. Inorganic residues were efficiently extracted using ethanol:water, while the use of acetonitrile followed by water significantly reduced the recovery of inorganic residues. Swab storage conditions were then investigated with results indicating decreased storage temperatures are required to retain the more volatile explosives. 相似文献
33.
Religion provides directives for positive moral action and the promotion of human welfare; but religious beliefs can also foster and justify abusive behavior in the context of family life and child rearing. Parents, who are emotionally distraught and cannot control their responses to their child’s needs or misbehavior, might wield religious ideas to intimidate and control their children. In our paper we set forth two fundamental types of religion-related emotional abuse and discuss the complex role that religion can play in perpetuating abusive family relationships. We address the emotional aspects of religion-related abuse and also its transgenerational transfer. We present a case illustration focusing on how such abuse leads to dysfunctional patterns of behavior in family relationships and disruptions in emotion regulation processes. Applying a Relational Family Therapy model, we consider select therapeutic implications for addressing and overcoming religious abuse and restoring functional emotion regulation processes in families. 相似文献
34.
Probation officers are the focal point for most interventions with delinquent youths in the juvenile justice system. The present
study examines probation strategies and interventions in a sample of 308 probation officers who completed the Probation Practices
Assessment Survey (PPAS) in a web-based survey. The PPAS measures six probation approaches: deterrence, restorative justice,
treatment, confrontation, counseling, and behavioral tactics. Structural equation models and latent class analyses showed
that probation officers use multiple approaches with delinquent youths consistent with the balanced and restorative justice
movement. Younger youths, high-risk youths, and youths with prior social service involvements are likely to receive more intensive
interventions. The implications of these findings for improving probation practices with delinquent youth are discussed. 相似文献
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Tina Søreide 《International Review of Law and Economics》2009,29(4):388-395
The presence of business-corruption provokes firms to make choices between legal business approaches and illegal bribery. The outcome of a chosen strategy will usually be uncertain at the time the decision is made, and a firm’s decision will depend partly on its attitude towards risk. Drawing on empirical results about business corruption, this paper describes the risks, uncertainties and benefits attached to bribery, and specifies their impact on firms’ propensity to offer bribes. It then demonstrates how risk averse firms can be more inclined to offer bribes than risk neutral and risk attracted firms. 相似文献
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