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Postmortem stability of DNA 总被引:11,自引:0,他引:11
High-molecular-weight DNA was recovered postmortem in sufficient quantities from various human organ tissues as well as from blood, although not all organs were equally well suitable. Good DNA stability was found in brain cortex, lymph nodes and psoas muscle over a period of three weeks postmortem. Spleen and kidney showed good DNA stability up to five days postmortem but after longer periods, rapid degradation was observed. Yields of DNA from blood were not consistent because of the non homogeneity of samples. Blood clots were rich with DNA. Generally, the amount of degraded DNA correlated directly with the duration of the postmortem period. However in some cases, DNA degradation was already prominent after a short period. However in some cases, DNA degradation was already prominent after a short period. Case histories showed that high environmental temperature at the site of death and/or infectious diseases prior to death were the main factors for rapid autolysis. Gradual disappearance to complete loss of the long fragments (15-23 kb) was observed in DNA fingerprinting using the minisatellite probe 33.15. No extra-bands were noted, thus excluding erroneous conclusions. However, evidentiary value of older samples was lower. 相似文献
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Ian Scoones Marc Edelman Saturnino M. Borras Jr. Ruth Hall Wendy Wolford Ben White 《The Journal of peasant studies》2018,45(1):1-20
A new political moment is underway. Although there are significant differences in how this is constituted in different places, one manifestation of the new moment is the rise of distinct forms of authoritarian populism. In this opening paper of the JPS Forum series on ‘Authoritarian Populism and the Rural World’, we explore the relationship between these new forms of politics and rural areas around the world. We ask how rural transformations have contributed to deepening regressive national politics, and how rural areas shape and are shaped by these politics. We propose a global agenda for research, debate and action, which we call the Emancipatory Rural Politics Initiative (ERPI, www.iss.nl/erpi). This centres on understanding the contemporary conjuncture, working to confront authoritarian populism through the analysis of and support for alternatives. 相似文献
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Principal-agent theory alerts principals to their problematic relationship with agents. The former are encouraged to take deliberate action to counter asymmetries in knowledge, moral hazard etc. To avoid this, principals should determine outcomes and contracts and incentives should be designed to achieve them. This approach has influenced the form of purchaser-provider arrangements, including the Job Network. This article reviews impacts, which include incentives for gaming and increased transaction costs. Another survey highlighted the extent to which innovation in the disability employment sector had depended on collaboration, which competition would end. The article then sketches an alternative pragmatic or experimental approach, which assumes that the centre can never establish outcomes that are other than provisional and corrigible. Program design needs to be built around this fundamental fact. Learning not 'carrots and sticks' is the appropriate form of relationship. The article explores the feasibility of this approach in a Job Network context . 相似文献
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Ian Bruff 《英国政治学与国际关系杂志》2009,11(2):332-351
This article critiques Open Marxism for an ontology which totalises human social practice—for Open Marxists, capitalist social relations are the singular constitutive source of human activity. Such a stance is superficially attractive yet ultimately inadequate, and I reinforce my case by demonstrating how other critical approaches—in this article, Foucauldian perspectives on power—suffer from similar deficiencies. Thus there is a need to resist the temptation of claiming to know how human social practice can be understood with recourse to a singular aspect (no matter how important) of such practice. I conclude that an excellent example of how to avoid such pitfalls is provided by Antonio Gramsci's writings, for they acknowledge the multifaceted yet nevertheless anchored existence lived by humans in capitalist societies. 相似文献
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The aim of this paper is to highlight the nature of the barriers facing women in terms of their participation in decision-making in Israeli sport, and to identify and evaluate some of the strategies and tactics adopted to overcome these barriers. This is done by making reference to a particular case study, the case of the process of establishing a major policy initiative in Israeli sport – the founding of the national Volleyball Academy for Young Talented Girls. The case is analyzed in order to identify how and why the goal of establishing the Academy was successful, and to consider what may be learned in terms of the implications for the tactics and strategies used that might be adopted by other women in similar circumstances. 相似文献