Evaluation of extraction techniques for the forensic analysis of human scalp hair using gas chromatography/mass spectrometry (GC/MS)

Preliminary research using on-line supercritical fluid extraction/gas chromatography-mass spectrometry (SFE/GC-MS) has shown that the natural and artificial surface components of human scalp hair are reproducible and differentiable. Therefore, these components may be useful for individualization or determining demographic characteristics or both. However, it is not known how the efficiency and selectivity of on-line SFE/GC-MS compares to other extraction methods. In this study, ultrasound, Soxhlet, and pressurized-fluid extraction were used to extract 1 mg to 1.3 g portions of a composite hair sample taken from an Asian male between the ages of 10 and 18. Percent extractables ranged from 0.9% to 5.6%, depending on the solvent used, and tended to increase with solvent polarity. Chemical analysis using GC/MS showed that the extracts contained large proportions of free fatty acids, squalene, cholesterol, and various wax esters. Finally, comparisons to SFE/GC-MS showed that this method possesses adequate efficiency, no observable differences in selectivity, and greater potential for miniaturization.     

How Has the Law Gone Mad? Reflections on Semiotics and Postomodernism

International Journal for the Semiotics of Law - Revue internationale de Sémiotique juridique -     

Designing Health Service Organization in the UK, 1968 to 1998: from Blueprint to Bright Idea and ‘Manipulated Emergence’

Four sets of reforms of the National Health Service are employed to illustrate the changing character of policy making in this sector over a thirty year period, from the production of a carefully developed technocratic blueprint for its organization to the promulgation of a series of bright ideas accompanied by incentives for local actors to develop them into concrete organizational arrangements consonant with these ideas. We term this latter approach ‘manipulated emergence’ and relate it to the literatures of organizational culture and of post-Fordism. The approach adopted by the 1997 Labour government is largely, though not wholly consistent with this, and it remains to be seen whether the high-water mark of manipulated emergence has passed.     

After Chechnya: At Risk in Dagestan

Population displacements in the aftermath of the Chechen conflict may undermine a complex political balance existing among the extraordinarily numerous ethnic groups in the neighbouring Republic of Dagestan. The destabilisation of Dagestan threatens to bring ethnic conflict to virtually the only state in the Caucasus to have avoided it thus far. This article considers the basis of ethnic accommodation in Dagestan, the policies and migratory patterns that have placed it at risk, and the regional context in which these have occurred.     

Cognitive appraisal of major and daily stressful events during adolescence: A multidimensional scaling analysis

Multidimensional scaling analysis was used to examine adolescents' cognitive appraisals of major and daily stressful events. The desirability of events was the only salient feature for early adolescents. Middle and late adolescents also appraised events in terms of their desirability; in addition, the amount of impact that events exerted on their lives and the generality of the causes of events were salient dimensions for these age groups. These results suggest increased complexity with age in adolescents' cognitive appraisals of stressful events. Correlational analyses also indicated that perceptions of personal coping capabilities are associated with high event desirability, high frequency of occurrence, stable causes, and decreased ability of others to be of help in coping.This research served as a portion of the doctoral dissertation of the first author and was supported in part by an institutional award from the University of Vermont to the second author.Received his Ph.D. from University of Vermont. Research interests include stressful events during adolescence.Assistant Professor of Psychology at the University of Vermont where he is investigating stress and coping among children and adolescents. Received his Ph.D from UCLA in 1980.