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This article points to a frequent feature in debates about the control of the police. Aside from cultural and political characteristics in the last decades, policing has changed and at present it is going through a stage of rapid change. The author defines the historical roots of police in democracies. He places the police within the framework of the sovereign state, the administration, the judiciary and the citizens. The state's control of police powers is described in its interdependency with new demands on the part of citizens regarding micro (domestic sphere/neighbourhood/community) and macro (urban sphere/state/European) levels. On a European scale, the article provides an oversight over the existing network consisting of internal, administrative, parliamentarian, judiciary, and civil (non-government/social movements) control agencies and mechanisms. In its conclusions the concept of ethical standards is introduced as a means of effective high-quality police management.  相似文献   
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Normally, the identification of the LSD drug is performed by forensic laboratories, using the Ehrlich spot test. However, this is a nonspecific analysis. Additionally, the Brazilian Federal Police has identified the presence of a new compound in seized blotters: 9,10-dihydro-LSD, an uncontrolled substance. In this work, easy ambient sonic-spray ionization mass spectrometry in the positive ion mode, EASI(+)-MS, was used to characterize LSD and 9,10-dihydro-LSD compositions directly from the surface of blotters. The presence of LSD in the seized blotter samples were also confirmed via high-performance liquid chromatography with ultraviolet detector. In a set of 41 blotters analyzed by EASI(+)-MS, 28 showed positive results for LSD, seven for 9,10-dihydro-LSD, and another six samples showed negative results for both LSD and 9,10-dihydro-LSD. The combination of thin layer chromatography with EASI-MS also demonstrated to be a relatively simple and powerful screening tool for forensic analysis of street drugs.  相似文献   
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