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Tarek Belal Tamer Awad Jack DeRuiter C. Randall Clark 《Forensic Science International Supplement Series》2008,178(1):61-82
A series of side chain regioisomers of 3-methoxy-4-methyl- and 4-methoxy-4-methyl-phenethylamines have mass spectra essentially equivalent to the controlled drug substance 3,4-methylenedioxymethamphetamine (3,4-MDMA), all have molecular weight of 193 and major fragment ions in their electron ionization mass spectra at m/z 58 and 135/136. The acetyl, propionyl and trifluoroacetyl derivatives of the primary and secondary regioisomeric amines were prepared and evaluated in GC–MS studies. The mass spectra for these derivatives were significantly individualized and the resulting unique fragment ions allowed for specific side chain identification. The trifluoroacetyl derivatives provided more fragment ions for molecular individualization among these regioisomeric substances. These trifluoroacetyl derivatives showed excellent resolution on a non-polar stationary phase such as Rtx-1. 相似文献
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International Journal for the Semiotics of Law - Revue internationale de Sémiotique juridique - Barcelona has become one of the most touristic cities in the world, with more than 18 million... 相似文献
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Zlatko Mehmedic M.Sc.Pharm. Suman Chandra Ph.D. Desmond Slade Ph.D. Heather Denham B.A. Susan Foster B.A. Amit S. Patel Ph.D. Samir A. Ross Ph.D. Ikhlas A. Khan Ph.D. Mahmoud A. ElSohly Ph.D. 《Journal of forensic sciences》2010,55(5):1209-1217
Abstract: The University of Mississippi has a contract with the National Institute on Drug Abuse (NIDA) to carry out a variety of research activities dealing with cannabis, including the Potency Monitoring (PM) program, which provides analytical potency data on cannabis preparations confiscated in the United States. This report provides data on 46,211 samples seized and analyzed by gas chromatography‐flame ionization detection (GC‐FID) during 1993–2008. The data showed an upward trend in the mean Δ9‐tetrahydrocannabinol (Δ9‐THC) content of all confiscated cannabis preparations, which increased from 3.4% in 1993 to 8.8% in 2008. Hashish potencies did not increase consistently during this period; however, the mean yearly potency varied from 2.5–9.2% (1993–2003) to 12.0–29.3% (2004–2008). Hash oil potencies also varied considerably during this period (16.8 ± 16.3%). The increase in cannabis preparation potency is mainly due to the increase in the potency of nondomestic versus domestic samples. 相似文献
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Tamer Awad Tarek Belal Jack DeRuiter C. Randall Clark 《Forensic science international》2010,194(1-3):39-48
The methoxy methyl phenylacetones share an isobaric relationship (equivalent mass but different elemental composition) to the controlled precursor substance 3,4-methylenedioxyphenylacetone (3,4-methylenedioxyphenyl-2-propanone; 3,4-MDP-2-P). The ten ring substituted methoxy methyl phenylacetones are resolved by capillary gas chromatography on a modified cyclodextrin stationary phase. All ten regioisomeric ketones eluted before the controlled precursor substance 3,4-methylenedioxyphenylacetone. The vapor phase infrared spectra generated from the capillary column effluent clearly differentiated 3,4-MDP-2-P from the various methoxy methyl phenylacetones. Additionally the methoxy methyl phenylacetones provide unique individual infrared spectra. Infrared absorption frequencies and patterns confirmed the relative position of the methoxy-group and the acetone side-chain for the regioisomeric ketones. 相似文献
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Juicios. Sobre La Elaboracin Del Genocidio II. By Daniel Feierstein. Buenos Aires: Fondo De Cultura Econmica, 2015.
Shifting Legal Visions. Judicial Change and Human Rights Trials in Latin America. By Ezequiel A. González‐Ocantos. Cambridge: Cambridge University Press, 2016. 下载免费PDF全文
Farid Samir Benavides Vanegas 《Law & society review》2018,52(1):286-289
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Samir Awad 《Third world quarterly》2013,34(6):1221-1226
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