Development of Latent Fingermarks on Surfaces of Food‐A More Realistic Approach

Latent fingermark developing methods from food (mandarin, egg, banana, apple, potato, carrot, eggplant, onion, bell pepper, and tomato) surface has been studied by 10 methods, including powdering method, small particle reagent method, and cyanoacrylate fuming method. The foods were stored under two conditions (room temperature and refrigerator) before fingermark deposition and aged for 2, 24, 48, and 72 h before fingermark development. In most of the food surfaces used in this study, cyanoacrylate fuming with 80% relative humidity was superior to the powder or small particle reagent methods. The quality of the fingermarks varied depending on the storage conditions before the fingermark deposition (in the refrigerator or at ambient temperature) and the time elapsed since the fingermark deposition. However, the storage conditions before the fingermark deposition and the time elapsed since the fingermark deposition did not show any correlation with the quality of the fingermark.     

Development of a specific fragment pattern-based quadrupole-Orbitrap mass spectrometry method to screen adulterated products of phosphodiesterase-5 inhibitors and their analogues

Recently, adulterated supplements with phosphodiesterase-5 inhibitors (PDE-5i) have frequently observed. New synthetic analogues obtained from the chemical modification of parent compounds are frequently found in illicit products despite continuous efforts to inspect for these adulterants. A rapid and accurate method based on quadrupole-Orbitrap mass spectrometry was developed for simultaneously confirming and quantifying 85 PDE-5i and derived analogues present in illicit products for erectile dysfunction (ED). Common ions of PDE-5i according to their similar structures were proposed based on MS/MS fragmentations. These common ions could be an important diagnosis of their presence targets or new emerging analogues in supplements. Several validation parameters were employed, resulting in a limit of detection and quantification of 0.09–8.55 ng/mL and 0.24–17.10 ng/mL, respectively. The linear correlation coefficient (r²) was higher than 0.995, and mean recoveries of target compounds were in the range of 82–118%. A total of 187 illicit products, obtained from on/offline markets over a period of 3 years (2015–2017), were screened by the established method. Approximately 53% of them were adulterated with PDE-5i or derived analogues at concentrations of 0.1–726.0 mg/g in the illicit products. In the interests of public health, this study describes a rapid and accurate method to determine PDE-5i and new emerging analogues in adulterated products.     

Multi-level Analysis of Disorder Policing and Fear of Crime in South Korea

Asian Journal of Criminology - Numerous studies have analyzed the relationship between disorder and fear of crime, but few have focused on the impact of policing against disorder on fear of crime....     

Trust and the protection of property rights: evidence from global regions

In this study, we address the issue of whether trust enhances institutional quality. Despite accumulated research on the topic, comparative studies examining whether such a relationship holds across different regions are rare. Consequently, in this study, we focus on the heterogeneous effect of trust on the protection of property rights worldwide. According to our research, in Western democracies, owing to relatively effective legal systems, trust facilitates cooperation among citizens in utilizing public means to collectively secure properties. In contrast, in other parts of the world, owing to less effective legal systems, citizens with high levels of trust, who presumably have access to many social resources, utilize private means such as informal networks, for protecting property rights. Our empirical analysis of time-series cross-sectional data, and individual-level survey data yields evidence supporting the aforementioned assertion. Moreover, we find suggestive evidence of a causal mechanism linking trust and institutional quality.

     

Social and semantic network analysis of Facebook pages: the case of Brexit and Bremain leaders

Asia Europe Journal - This paper aims to probe how leaders of Brexit (Nigel Farage) and Bremain (David Cameron) camps communicated with the UK public via Facebook fan pages. This study employed two...     

Social integration and suicide in South Korea

The increasing suicide rate in South Korea in recent decades was found to be associated with measures of social integration/regulation (birth and divorce rates).     

Analysis of the impurities in the methamphetamine synthesized by three different methods from ephedrine and pseudoephedrine

Organic impurities of methamphetamine may show different patterns by synthesis. In the present study, we tried to find the impurities reflecting the conditions of synthesis by comparing impurity patterns of the methamphetamine samples synthesized by different methods. Sixteen methamphetamine samples were synthesized from ephedrine and pseudoephedrine by the three different manufacturing methods of Emde, Nagai and Moscow. The synthesized samples were extracted with ethyl acetate containing four internal standards, and the patterns of the organic impurities were investigated by GC-MS and GC-FID . Through the investigation, we found 10 peaks appearing in the latter part of GC chromatograms are characteristic to synthesis. The areas of the selected peaks were converted to the variables suitable for the statistical calculation, and the synthesized samples could be classified into four groups through the resultant cluster analysis.