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Four presumptive blood tests, Hexagon OBTI, Hemastix(R), Leucomalachite green (LMG), and Kastle-Meyer (KM) were compared for their sensitivity in the identification of dried bloodstains. Stains of varying blood dilutions were subjected to each presumptive test and the results compared. The Hexagon OBTI buffer volume was also reduced to ascertain whether this increased the sensitivity of the kit. The study found that Hemastix(R) was the most sensitive test for trace blood detection. Only with the reduced buffer volume was the Hexagon OBTI kit as sensitive as the LMG and KM tests. However, the Hexagon OBTI kit has the advantage of being a primate specific blood detection kit. This study also investigated whether the OBTI buffer within the kit could be utilized for DNA profiling after presumptive testing. The results show that DNA profiles can be obtained from the Hexagon OBTI kit buffer directly. 相似文献
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Tribulus terrestris is a nutritional supplement highly debated regarding its physiological and actual effects on the organism. The main claimed effect is an increase of testosterone anabolic and androgenic action through the activation of endogenous testosterone production. Even if this biological pathway is not entirely proven, T. terrestris is regularly used by athletes. Recently, the analysis of two female urine samples by GC/C/IRMS (gas chromatography/combustion/isotope-ratio-mass-spectrometry) conclusively revealed the administration of exogenous testosterone or its precursors, even if the testosterone glucuronide/epitestosterone glucuronide (T/E) ratio and steroid marker concentrations were below the cut-off values defined by World Anti-Doping Agency (WADA). To argue against this adverse analytical finding, the athletes recognized having used T. terrestris in their diet. In order to test this hypothesis, two female volunteers ingested 500 mg of T. terrestris, three times a day and for two consecutive days. All spot urines were collected during 48 h after the first intake. The (13)C/(12)C ratio of ketosteroids was determined by GC/C/IRMS, the T/E ratio and DHEA concentrations were measured by GC/MS and LH concentrations by radioimmunoassay. None of these parameters revealed a significant variation or increased above the WADA cut-off limits. Hence, the short-term treatment with T. terrestris showed no impact on the endogenous testosterone metabolism of the two subjects. 相似文献
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The article evaluates the concept of ‘developmental’ policies, comparing post-communist Russia and Sub-Saharan African (SSA) states. Asian ‘developmental state’ policies have been identified as developmental because of successful industrial policies and leaders’ ability to implement them. The comparison shows that while these features have been absent in SSA, notably due to the trapping effects of commodity dependence, Russia exhibits an original dualistic model where the negative impact of commodity dependence (such as the creation of rents) is compatible with developmental industrial policies. The evidence presented demonstrates the importance of constraints that stem from both economic and political structures, in turn explaining variations in developmental policy effectiveness. 相似文献
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Jennifer Hankel Kyria Brown Susan Dewey Caroline McKinnon 《Women & Criminal Justice》2019,29(2):98-111
This investigation establishes a baseline understanding of how women exiting the sex industry understand the economic options available to them by reviewing their work experiences in the legal economy, histories of sex industry involvement, and their aspirations for legal work upon entering a yearlong residential program offered at a transitional housing facility. Specifically, it explores how prior work experience, type of sex industry involvement, and demographic characteristics such as race and age intersect with women’s legal work aspirations upon leaving the sex industry. Analysis indicates that women’s occupational choices are limited by prior experiences within the formal and informal economies and that women of color and poor women of all ethno-racial backgrounds are particularly likely to face disadvantages in both economic sectors. Findings accordingly indicate that rehabilitative settings must consider whether the career pathways they create lead to economic self-sufficiency and reduce the likelihood that women will return to life situations they express a desire to leave. 相似文献