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The substituted benzylpiperazines, 3,4-methylenedioxybenzylpiperazine (3,4-MDBP), its regioisomer 2,3-methylenedioxybenzylpiperazine (2,3-MDBP) and four isobaric ring substituted methoxymethylbenzylpiperazines (MMBP) have almost identical mass spectra. Perfluoroacylation of the secondary amine nitrogen of these isomeric piperazines gave mass spectra with differences in relative abundance of some fragment ions. However, the spectra did not yield any unique fragments for specific identification of one isomer to the exclusion of the other compounds. Gas chromatography coupled with infrared detection (GC-IRD) provides direct confirmatory data for the structural differentiation between the six isomers. The mass spectra in combination with the vapor phase infrared spectra provide for specific confirmation of each of the isomeric piperazines. The underivatized and perfluoroacyl derivative forms of the ring substituted benzylpiperazines were resolved on the polar stationary phase Rtx-200. 相似文献
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The purpose of the current study was to examine the effect of a motivational intervention on conduct problem youth with psychopathic features. Specifically, the current study examined conduct problem youths' mental set (or theory) regarding intelligence (entity vs. incremental) upon task performance. We assessed 36 juvenile offenders with psychopathic features and tested whether providing them with two different messages regarding intelligence would affect their functioning on a task related to academic performance. The study employed a MANOVA design with two motivational conditions and three outcomes including fluency, flexibility, and originality. Results showed that youth with psychopathic features who were given a message that intelligence grows over time, were more fluent and flexible than youth who were informed that intelligence is static. There were no significant differences between the groups in terms of originality. The implications of these findings are discussed including the possible benefits of interventions for adolescent offenders with conduct problems and psychopathic features. (PsycINFO Database Record (c) 2012 APA, all rights reserved). 相似文献
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Randall G. Holcombe 《Public Choice》2011,149(1-2):1-3
From its beginnings, public choice has always had a substantial component devoted to federalism and local government decision-making. The DeVoe Moore Center at Florida State University has made the study of local government within a public choice framework a core component of its mission. The Center held a conference February 17?C19, 2011, on public choice in a local government setting. This special issue of Public Choice contains the papers presented at that conference. 相似文献
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Abstract. The article examines four recent studies, which represent the scholarly divisions in and the strengths and the weakness of current research on migration, citizenship and race in Europe and, to a lesser degree, the USA. Organising the review around three themes — the causes of post–war migration, integration and race, and the relationship between citizenship and state sovereignty, it reviews the studies in the context of broader debates about postnational citizenship, the decline of state sovereignty and the role of theory in the study of citizenship. It argues that the studies of postnationalism (Jacobson) and race and racism (Solomos & Back) suffer from faults common to macro–sociological approaches and unfocused attempts to blend normative theory and causal explanation, while the studies of integration (Favell) and citizenship, immigration and the state (Joppke) are exemplars of approaches that successfully pair an interest in theory with detailed causal analysis. The article concludes by suggesting that the debate between 'nationalists' and 'postnationalists' can now be transcended. Postnationalism, it concludes, contains two theses, not one: an empirical and a causal. The empirical thesis — that universal personhood has decoupled rights and identity – is incontrovertible; the causal — that this development resulted from the 'internationalisation' and 'universalisation' of human rights legislation and discourse — is, in the light of Joppke's and other's research, false. The sources of third–country nationals' social and economic status, the foundations of the distinction between rights and identity, are domestic. 相似文献