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Ethanol formation in unadulterated postmortem tissues   总被引:2,自引:0,他引:2  
During the investigation of aviation accidents, postmortem samples obtained from fatal accident victims are submitted to the FAA's Civil Aerospace Medical Institute (CAMI) for toxicological analysis. During toxicological evaluations, ethanol analysis is performed on all cases. Many species of bacteria, yeast, and fungi have the ability to produce ethanol and other volatile organic compounds in postmortem specimens. The potential for postmortem ethanol formation complicates the interpretation of ethanol-positive results from accident victims. Therefore, the prevention of ethanol formation at all steps following specimen collection is a priority. Sodium fluoride is the most commonly used preservative for postmortem specimens. Several studies have been published detailing the effectiveness of sodium fluoride for the prevention of ethanol formation in blood and urine specimens; however, our laboratory receives blood or urine in approximately 70% of cases. Thus, we frequently rely on tissue specimens for ethanol analysis. The postmortem tissue specimens received by our laboratory have generally been subjected to severe trauma and may have been exposed to numerous microbial species capable of ethanol production. With this in mind, we designed an experiment utilizing unadulterated tissue specimens obtained from aviation accident victims to determine the effectiveness of sodium fluoride at various storage temperatures for the prevention of microbial ethanol formation. We found that without preservative, specimens stored at 4 degrees C for 96 h showed an increase in ethanol concentration ranging from 22 to 75 mg/hg (average 42 +/- 15 mg/hg). At 25 degrees C, these same specimens showed an increase ranging from 19 to 84 mg/hg (average 45 +/- 22 mg/hg). With the addition of 1.00% sodium fluoride, there was no significant increase in ethanol concentration at either temperature.  相似文献   
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This article reports the results of a multiyear series of economicexperiments comparing the two dominant types of legal proceduresused in adjudication: (1) the 'adversarial' model of party-controlledprocedure versus (2) the 'inquisitorial' model of judge-controlledprocedure. The principal finding is that the relative fact-findingefficiency of the two systems, in terms of both the 'revelation'of hidden facts and the 'accuracy' of decision, depends significantlyupon the information structure. Under a 'private' informationstructure, inquisitorial procedure is relatively more efficient,whereas under a 'correlated' information structure, adversarialprocedure is relatively more efficient.  相似文献   
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In this concept paper, the Joint Working Group on Israeli‐Palestinian Relations‐a group of influential Palestinians and Israelis that has been meeting periodically since 1994 to discuss final‐status issues in the Israeli‐Palestinian negotiations‐explores the future relationship between the two societies after the signing of a peace agreement. The paper considers a relationship based on total separation between the two societies and states as neither realistic nor desirable. Instead, it envisages a future relationship based on mutually beneficial cooperation in many spheres, conducive to stable peace, sustainable development, and ultimate reconciliation. The basis for such a relationship must be laid in the process and outcome of the final‐status negotiations and in the patterns of cooperation established on the ground. Efforts at cooperation and reconciliation cannot be pursued apart from their political context. The paper argues that the only feasible political arrangement on which a cooperative relationship can be built is a two‐state solution, establishing a genuinely independent Palestinian state alongside of Israel. The resolution of final‐status issues must be consistent with the sovereignty, viability, and security of both states. The paper then proceeds to describe several models for the relationship between the two states and societies. It advocates a model of close cooperation, but proposes that this relationship be built in stages. The scope and speed of expanding and institutionalizing cooperative activities must be determined by experience‐by the extent to which such activities meet the needs of both parties, enhance mutual trust, and reduce inequalities between the parties. Finally, the paper discusses three avenues for promoting a cooperative relationship based on equality, reciprocal benefit, and mutual trust and respect: the development of functional ties and civil‐society institutions across national borders; programs directed toward attitude change and stereotype reduction; and efforts to close the economic and political gap between the two societies.  相似文献   
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