This study presents a number of pseudo-operational trials on plastic bags investigating the double- and co-fuming process of a one-step fluorescent cyanoacrylate (LumicyanoTM) in comparisons with the two-step process with basic yellow 40 (BY40) staining for the detection of latent fingermarks. The results demonstrate that both Lumicyano solution and dye contribute to the increased detection of latent fingermarks during the double-fuming process (trial 1). Co-fuming the Lumicyano solution and dye separately (at a concentration of 8%) but simultaneously was less effective than 8% Lumicyano (trial 2). Co-fuming Lumicyano 8% and an additional 8% Lumicyano dye by weight was more effective than Lumicyano 8% (trial 3), possibly due to increased fluorescent material deposition during co-fuming allowing for better visualization. The use of BY40 after Lumicyano resulted in a considerable increase in detected fingermarks. 相似文献
Volatile organic compounds (VOCs) are by-products of cadaveric decomposition and are responsible for the odor associated with decomposing remains. The direct link between VOC production and individual postmortem microbes has not been well characterized experimentally. The purpose of this study was to profile VOCs released from three postmortem bacterial isolates (Bacillus subtilis, Ignatzschineria indica, I. ureiclastica) using solid-phase microextraction arrow (SPME Arrow) and gas chromatography–mass spectrometry (GC-MS). Species were inoculated in headspace vials on Standard Nutrient Agar and monitored over 5 days at 24°C. Each species exhibited a different VOC profile that included common decomposition VOCs. VOCs exhibited upward or downward temporal trends over time. Ignatzschineria indica produced a large amount of dimethyldisulfide. Other compounds of interest included alcohols, aldehydes, aromatics, and ketones. This provides foundational data to link decomposition odor with specific postmortem microbes to improve understanding of underlying mechanisms for decomposition VOC production. 相似文献
Delinquent behavior is common during adolescence and may disrupt trajectories of labor market attainment. Estimates of the relationship between delinquency and employment are threatened by selection bias, as youth who engage in delinquency often differ substantially from youth who do not. The current study examined the association between adolescents’ engagement in serious delinquency and four measures of occupational attainment in young adulthood: unemployment, personal earnings, employer-provided benefits, and occupational earnings. It examined the effect of delinquency independent of between-person differences in a variety of attributes and tested whether the hypothesized relationship was mediated by educational attainment, work experience, disconnectedness from both education and work, or criminal justice sanctioning. This study analyzed data from the first four waves of the National Longitudinal Survey of Adolescent to Adult Health (Add Health), yielding an analytic sample of 14,800 (51% female, mean age 16 years). The Wave 1 Add Health survey was administered in 1994–1995, and Wave 4 of the survey was administered in 2007–2008. The analytic strategy, propensity score weighting, produced estimates that were less biased by differences between youth who had and who had not engaged in delinquent behavior. The study found that delinquency was significantly associated with the likelihood of being unemployed: compared to non-delinquents, delinquents were more likely to be unemployed even after controlling for temporally prior traits and resources, human capital, and criminal justice contact. The results provided more qualified support for hypothesized relationships between delinquency and job quality. The study concluded that offending may result in less fruitful job searches, but once a search results in employment, employed delinquents are not readily discernible from employed non-delinquents in the quality of their jobs. These conclusions contribute to literature on the labor market outcomes of people with histories of adolescent delinquency as they enter young adulthood.
As transgender and gender-expansive (TGE) youth and young adults (YYA) navigate challenging environments, they often seek spaces for safety and acceptance. This study explores ways in which a group of TGE YYA who were engaged with a community-based service organization make sense of their experiences, challenges, and successes in ways that illuminate the factors and processes associated with resilience. Secondary data analysis was conducted on qualitative responses from 85 TGE YYA ages 13–24. The themes that emerged provide insight into the ways community-based programs and providers can understand and support the resilience of TGE YYA. 相似文献
Self-harm is widely recognized as a significant adolescent social problem, and recent research has begun to explore its etiology.
Drawing from Agnew’s (1992) social psychological strain theory of deviance, this study considers this issue by testing three hypotheses about the effects
of traditional and cyber bullying victimization on deliberate self-harm and suicidal ideation. The data come from a school-based
survey of adolescents in a rural county of a southeastern state (n = 426); 50% of subjects are female, their mean age was 15 years, and non-Hispanic whites represent 66% of the sample. The
analysis revealed that both types of bullying are positively related to self-harm and suicidal ideation, net of controls.
Moreover, those relationships are partially mediated by the negative emotions experienced by those who are bullied and partially
moderated by features of the adolescent’s social environment and self. Regarding the latter, exposure to authoritative parenting
and high self-control diminished the harmful effects of bullying victimization on self-harm and suicidal ideation. The article
concludes by discussing the implications of these conclusions for future research and for policy efforts designed to reduce
self-harm. 相似文献
This research examined the “mental health literacy” of adolescents concerning eating-disordered behavior. A vignette describing
a fictional 16-year old female meeting diagnostic criteria for bulimia nervosa was presented to 522 female high school students,
followed by a series of questions concerning treatment of and treatment-seeking for the problem described. Results indicated
that primary care practitioners, mothers and close female friends were most highly regarded as potential sources of help.
Self-help interventions, including the use of vitamins and minerals, were also highly regarded, whereas participants were
less positive about the benefits of mental health specialists and ambivalent about the use of anti-depressant medication.
Most participants believed that the problem described would be difficult to treat, and that relapse was likely even given
appropriate treatment. An additional finding of note was that among participants with a high level of eating disorder symptoms
(n=36, 6.9%), recognition of an eating problem was poor. We conclude that beliefs likely to be conducive to low and/or inappropriate
treatment-seeking for eating problems may be common among adolescent girls. In addition, the findings suggest that prevention
programs for the eating disorders need to target not only at-risk individuals, but also individuals in their immediate social
environment. 相似文献
It is argued that there are significant differences between green electoral politics in Europe and green developments in the affluent non-European west, and that these are such that, despite the greater political formalization of the green movement in Western Europe, there is a sense in which North American and Antipodean developments are ultimately more fundamental than those that have occurred in Europe. Loosely adopting explanatory categories employed by Rudig and Lowe in a Political Studies article, we examine evidence under four sub-heads: electoral thresholds; the historical legacy of the environment movement; the different contextual roles played by the anti-nuclear movement and wilderness experience, and ecology, Marxism and the new left. 相似文献