Pyrolysis Products of Linear Alkylbenzenes— Implications in Fire Debris Analysis*

Abstract: In this case report, potential interferences from an improvised fire‐extinguishing agent, a dishwashing liquid, containing linear alkylbenzene sulfonates (LAS), was studied. The presence of linear alkylbenzenes (LABs) in the fire debris sample was identified from the summed ion profile (SIP) analysis. It was found that the LAS from dishwashing liquids produce LABs by thermal degradation. Direct pyrolysis of a LAS‐containing dishwashing liquid at 300°C yielded a distribution of LABs in the SIP. LABs began to break down at pyrolysis temperatures between 450 and 500°C and completely break down by 800°C. Observed pyrolysis breakdown products of LABs included toluene, ethylbenzene, meta‐, para‐, and ortho‐xylenes, propylbenzene, indane, naphthalene, and 1‐ and 2‐methylnaphthalenes. These data suggested the presence of LABs in fire debris evidence might complicate subsequent analysis because their breakdown products contained some of the target compounds common to ignitable liquid identification. Therefore, a positive determination of the presence of foreign ignitable liquids should be carefully evaluated when there is a presence of LABs in the SIP.     

A Block-Level Analysis of Medical Marijuana Dispensaries and Crime in the City of Los Angeles

The liberalization of marijuana laws may have implications for neighborhood crime insofar as the distribution of marijuana through a dispensary system may provide additional opportunities for criminal behavior to take place. This project fills an important gap in the scant literature on medical marijuana dispensaries and neighborhood crime rates by integrating perspectives from environmental criminology and social organization theories in investigating the dispensary-crime nexus through interaction models and flexibly assessing dispensaries’ relationship to crime at different spatial scales. This study found the placement of a medical marijuana dispensary in the previous year to be associated with crime rate change, in both the block and the surrounding area, over and above predictor variables drawn from social organization theory. And, this study’s interaction models suggest that marijuana dispensaries may increase crime rates on socially organized blocks, with such blocks potentially experiencing a slight perturbation in their ecological continuity from a dispensary’s establishment.     

Time-resolved hair analysis of MDMA enantiomers by GC/MS-NCI

The aim of the study was to determine the enantioselective disposition of 3,4-methylenedioxymethamphetamine (MDMA) and other amphetamine-type stimulants (ATS) in segmented hair specimens of self-declared ecstasy abusers, who took part in a double-blind placebo-controlled six-way crossover study during approximately 7 weeks, during which they received a 75 and a 100 mg dose of racemic MDMA twice. Hair specimens were washed and cut into pieces of 2 cm length. After digestion and solid phase extraction, the enantiomers were derivatized with a chiral agent (2S,4R)-N-heptafluorobutyryl-4-heptafluorobutoyloxy-prolyl chloride, developed at the authors laboratory and quantified by gas chromatography coupled to mass spectrometry operating in the negative chemical ionization mode. Most of the hair specimens that were tested positive for MDMA showed a predominance of the (R)-enantiomer. The R/S ratios of MDMA varied between 1.02 and 2.75 and total concentrations ranged from 0.1 to 20.1 ng/mg. The enantiomers of its metabolite 3,4-methylenedioxyamphetamine (MDA) were also quantified in most hair segments. The R/S ratios of MDA varied between 0.60 and 1.60, while the concentrations of the enantiomers ranged from 10 to 160 pg/mg hair. When segmental analysis was performed on single hair specimens, no inversion of the R versus S ratios of MDMA and MDA was observed. The predominance of (R)-MDMA in hair was in accordance with those already published for other matrices. Furthermore, both enantiomers of amphetamine (AM) were also detected in hair segments of four volunteers and the R/S ratios ranged from 1.00 to 1.47.     

Organised crime threat assessments: a critical review

Since the beginning of the 21st century, several national and international government agencies have initiated organised crime threat assessments. Additionally, a few scholars have published methods to assess the risks and threats of organised crime. These governmental bodies and scholars claim that their reports and methods can demonstrate that certain forms of organised crime are more threatening than others and thus help policy-makers set strategic priorities. In this article I discuss these claims by examining the reliability and validity of the operational definitions of the key concepts used, such as organised crime, threat and risk. This examination reveals that most reports and methods provide insufficient detail—and sometimes even no details at all—to guarantee the reliability and validity of their operational definitions. The search for validity is made particularly difficult by the ambiguity surrounding the concepts of organised crime, threat and risk, while the concept of cost is less problematic. Moreover, establishing what constitutes a threat is at its core a normative decision that cannot be left to intelligence analysts or scientists alone. The challenge ahead lies in acknowledging the normative framework of organised crime threat assessments and within that framework maximising the reliability and validity of the operational definitions of key concepts and related measuring instruments.     

Eisenhower, the British and the security of Hong Kong, 1953-60

This article is an examination of Hong Kong's importance within British-American security arrangements in the Far East during the presidency of Dwight D. Eisenhower. Archival evidence indicates that the Eisenhower Administration accepted a greater deal of commitment to the defence of Hong Kong during the 1950s — a period of significant hostility between the United States and the People's Republic of China. To understand this policy evolution in the broader context, this study evaluates the differences in British and American attitudes towards China during the 1950s and the effect of this on US policy towards Hong Kong.     

Deliberate self-harm and suicide attempt in custody: distinguishing features in male inmates' self-injurious behavior

Self-injurious behavior involving deliberate self-harm and suicide attempts by inmates while under custodial authority is a major problem for prisons and jails (prevalence, legal obligation for suicide prevention, and stress for officers). The differentiation of "serious" vs. "non-serious" and often manipulative suicide attempts as distinct phenomena, each with its own clinical features, is controversially discussed in current literature and a challenge for every diagnostician. If distinct clinical presentations and histories can be observed, an estimation of the seriousness of each act of self-injurious behavior can be simplified, whereby appropriate treatment of the individual case becomes possible. The aim of the study was to find differences between self-injurious behavior of "low seriousness" (i.e. low lethality and low suicidal intent) and of "high seriousness". Therefore, inmates showing self-injurious behavior were divided into subgroups of deliberate self-harm and suicide attempters on the basis of the act's intent and lethality. This was followed by a comparison of the clinical presentations of the individual inmates constituting the subgroups. Hence, 49 inmates showing self-injurious behavior were interviewed and tested with a variety of instruments (SCID-I and II, PCL-R, BDI-II, BHS, BSS, SIS, etc.), and their prison and health files were examined. The results indicate significant correlations between seriousness and some demographic, prison-related variables as well as different measures of depression. Negative, but nonsignificant correlations could be observed with regard to cluster B personality disorders. The PCL-R total score as well as PCL-R factor 1 showed a statistical trend for negative correlations with measures of seriousness. Inmates showing deliberate self-harm and suicide attempters seem to differ in a number of ways. Implications on how the individual prisoner should be treated are discussed.     

Hydrogen: Fueling EU-Morocco Energy Cooperation?

The war in Ukraine and the looming threat of climate change are driving the strategic need to diversify sources of energy, including renewables. Therefore, the European Union aims to develop energy relations with non-EU member states, and Morocco has become a key priority. Both Brussels and Rabat are pursuing ambitious green policies and cooperation initiatives, including on hydrogen. Drawing on theories of international institutions and political economy, this article analyzes hydrogen-related relationship patterns and explains demand and supply factors as drivers of institutionalized energy cooperation. We examine the EU's hydrogen approach and development, its relations with Morocco, and the political interests of both sides. Our analysis shows that the complex interdependencies in the evolving EU-Morocco hydrogen relations indicate that demand can be met by supply. However, challenges remain, including the need to deepen the partnership and prepare the market for commercial hydrogen production.     

Publics and biobanks in China and Europe: a comparative perspective

We compare public perceptions of biobanks in China and in Europe, reporting similarities and differences in how publics in Europe and China view key issues in the realm of biobank research. Despite many differences in perception, the similarity in the perception of biobanks in China and in Europe is striking. Our research finds that Chinese with lower education levels are less concerned about privacy, while those with higher education levels have preferences in privacy protection that are similar to those in Europe. Transnational research is perceived positively in both regions, but specific historical experiences shape how people approach these issues. While Chinese publics focus on certain effects of international research on the Chinese state, Europeans are mainly concerned about data security and impacts on research. The study is based on 66 focus groups conducted in China (6) and Europe (60), with approximately 700 participants.