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Eighteen external quality assessment (proficiency testing) samples were prepared from client specimens collected with the Intercept® oral fluid collection device and by spiking drug-free oral fluid. Samples were circulated in pairs at quarterly intervals to 13 UK and USA based laboratories for analysis by a panel of OraSure micro-plate Intercept® enzyme immunoassay kits and hyphenated mass spectrophotometric techniques. During the survey, there was a single case of non-specificity in a false report for methadone. The major errors were of lack of sensitivity relative to the concentration thresholds specified for the immunoassays. The sensitivity for overall ‘present’/‘not found’ reports calculated as true positives/(true positives + false negatives) were for the amfetamine specific assay 50%, methyl-amfetamines 93%, barbiturates 64%, cannabinoids 73%, cocaine and metabolites 100%, benzodiazepines 69%, methadone 95%, opiates 79% (opiates excluding oxycodone 93%), phencyclidine 93% and human gamma-globulin 97%. A small number of the sensitivity errors were attributable to errors in chromatographic confirmation techniques.  相似文献   
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Reviews     
Susan Gross Solomon (ed.), Beyond Sovietology: Essays in Politics and History. New York and London: M.E. Sharpe, 1993, 254 pp., £38.00.

Alice H. Amsden, Jacek Kochanowicz & Lance Taylor, The Market Meets Its Match. Restructuring the Economics of Eastern Europe. Cambridge, MA: Harvard University Press, 1994, 250 pp.

Robert E. Ebel, Energy Choices in Russia. Washington, DC: Center for Strategic and International Studies, 1994, xii + 152 pp., $16.95.

Michael Waller, The End of the Communist Power Monopoly. Manchester: Manchester University Press, 1993, viii + 287 pp., £35.00 h/b., £9.99 p/b.

Minxin Pei, From Reform to Revolution: The Demise of Communism in China and the Soviet Union. Cambridge, MA: Harvard University Press, 1994, 253 pp., £29.95.

William G. Rosenberg & Lewis H. Siegelbaum (eds), Social Dimensions of Soviet Industrialisation. Bloomington and Indianapolis, IN: Indiana University Press, 1993, xix + 296 pp., £12.99 p/b.

Taras Kuzio & Andrew Wilson, Ukraine: Perestroika to Independence. Basingstoke: Macmil‐lan Press, 1994, xiv + 260 pp., £40.00.

Russell F. Farnen (ed.), Nationalism, Ethnicity, and Identity. Cross National and Comparative Perspectives. New Brunswick, NJ, and London: Transaction, 1994, xiv + 538 pp., £49.95.

Edwin Thomas Bacon, The Gulag at War: Stalin's Forced Labour System in the Light of Archives. Basingstoke: Macmillan, 1994, xii + 190 pp.

Robert S. Ross, China, the United States and the Soviet Union: Tripolarity and Policy Making in the Cold War. Armonk, NY: M. E. Sharpe, 1993, x + 204 pp., £42.00.  相似文献   

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Economical liberalization, market globalization and soy expansion stimulated the advance of big transnational companies in the Southern Cone countries (Brazil, Argentina, Paraguay and Uruguay). Currently, the main corporations acting on the last links of the productive chain are ADM (Archer Daniels Midland), Bunge, Cargill and Dreyfus (the ABCD firms), global leaders in the soy trade. The objective of this contribution is to analyze the different strategies these companies articulate in the Southern Cone, and their dynamics in local space through market relations with local producers. The results show the rapid and intense process of denationalization of the firms in the soy productive chain as well as the high level of market internationalization and company concentration. In spite of this, this study shows that all transnational power of ABCD firms, which seems so abstract and intimidating when seen in the global scale, depends on its basis of the formation, maintenance and exploration of relations of proximity, trust and reciprocity with local actors (especially rural producers), including family friendship linkages.  相似文献   
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ABSTRACT

Prisoners serving indeterminate sentences in the United Kingdom do not know when or if they will be released from prison. Release and progression decisions are determined by the risk the ISP presents of reoffending. This makes the assessment of risk a high stakes business for ISPs. Whilst there is a large body of literature focused on prisoners’ general experiences of prison, there is an absence of specific empirical exploration of prisoners’ experiences of risk assessment. This paper aims to address this gap by reporting the results of a qualitative exploration of ISPs’ experiences of psychological risk assessment. Interviews with 10 ISPs were conducted and analysed using Grounded Theory methods. Analysis indicated that prisoners experienced the prison environment as characterised by violence, volatility and suffering. Psychological risk assessment is embedded within this emotionally and physically challenging context but also contributes to the experience of suffering. Within this context, prisoners felt stuck, powerless and out of control in relation to risk assessment, and experienced psychologists as untrustworthy yet powerful. Understanding prisoners’ experiences is the first step in resolving some of the long-reported difficulties in working relationships between psychologists and prisoners as well as making the process more procedurally just.  相似文献   
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