Adolescents’ Self-Perception of Morality,Competence, and Sociability and their Interplay with Quality of Family,Friend, and School Relationships: A Three-Wave Longitudinal Study

Morality, competence, and sociability have been conceptualized as fundamental dimensions on which individuals ground their evaluation of themselves and of other people and groups. In this study, we examined the interplay between self-perceived morality, competence, and sociability and relationship quality within the core social contexts with which adolescents have extensive daily interactions (family, friends, and school). Participants were 916 (51.4% girls; M_age?=?15.64 years) adolescents involved in a three-wave longitudinal study with annual assessments. The results of cross-lagged analyses indicated that (a) self-perceived morality was more important than self-perceived competence and sociability in strengthening family, friend, and school relationships; and (b) high-quality friendships led to increasing levels of self-perceived morality over time. Overall, this evidence advances our theoretical understanding of the primacy of morality from a self-perspective approach and highlights the developmental importance of friends.     

Effects of synthetic cannabinoids on electroencephalogram power spectra in rats

Several synthetic cannabinoids have recently been distributed as psychoactive adulterants in many herbal products on the illegal drug market around the world. However, there is little information on pharmacology and toxicology of such compounds. Although Δ(9)-tetrahydrocannabinol (Δ(9)-THC), a psychoactive cannabinoid of marijuana, was reported to affect electroencephalograms (EEG) of rats, the effects of synthetic cannabinoids are unknown. We examined the pharmacological activities of three synthetic cannabinoids; cannabicyclohexanol (CCH), CP-47,497 and JWH-018; by analyzing EEG power spectra and locomotor activity after intraperitoneal administration to rats and compared them with those of Δ(9)-THC. The three compounds significantly increased the EEG power in the frequency range of 5.0-6.0 Hz for the first 3h, while Δ(9)-THC decreased the power spectra in the wide range of 7.0-20.0 Hz during the first hour. These results indicate that the effect of the three compounds on EEG is different from that of Δ(9)-THC. Additionally, CCH, CP-47,497 and JWH-018 significantly decreased the locomotor activity for 11.5h, 11h and 4.5h, respectively, after administration which was longer than that of Δ(9)-THC (3.5h). Furthermore, all three compounds significantly reduced the total amounts of locomotor activity during a 3-h, 6-h and 12-h period after injection, whereas no statistical difference was observed for the Δ(9)-THC injection. Among the three compounds, CCH and CP-47,497 exerted a longer duration of the change in the EEG power spectra and suppression of the locomotor activity than JWH-018.     

Mining codes in Africa: emergence of a ‘fourth’ generation?

A burgeoning interest among academics, policy-makers and civil society groups has developed concerning Africa's extractive sector and particularly its mining codes, which are now at the centre of a wider policy debate over natural resource governance and economic development on the continent. This article reviews the evolution of Africa's regulatory codes in the mining sector, which has undergone what Bonnie Campbell describes as ‘three generations’ of liberalization since the 1980s. We also highlight new voluntary, regional and transnational initiatives, driven by a host of heterogeneous actors from Africa and abroad, which constitute a ‘fourth’ generation of mining codes and natural resource governance practices that place primary emphasis on transparency and accountability by both mining companies and host governments. This new generation of natural resource governance initiatives presents new opportunities as well as unique challenges, particularly with the growing role of emerging economies such as the BRICS (Brazil, Russia, India, China and South Africa). We conclude by assessing future trends and policy challenges in Africa's extractive sector governance.     

Comparison of four DNA extraction methods to extract DNA from cigarette butts collected in Lebanon

Cigarette butts collected from crime scenes represent valuable sources of DNA. However the extraction of the genetic material may deem challenging especially when different contaminants may compromise the integrity, quality, and quantity of DNA obtained. This study aims at comparing four extraction methods (Chelex-100, soaking + Chelex-100, Chelex-100?+?PK, and DNA IQ? System) with the intention of identifying the one with maximal recovery rate and profiling success. DNA was extracted using aforementioned four methods from 70 cigarette butts collected from sites across Lebanon. DNA was quantified by qPCR using TaqMan Quantifiler Kit on an Applied Biosystems 7300 SDS instrument and genotypes were obtained using the PowerPlex® 21 kit on an Applied Biosystems 3130 Genetic Analyser. The findings of this work showed that DNA extraction with Chelex-100?+?PK is preferred to the other three methods when seeking both, a high yield and the generation of maximal numbers of full profiles. The Chelex-100?+?PK method is simple, cost effective, and therefore suitable for routine cigarette butts case studies.     

Maturing Sino–Africa relations

It is argued that China’s relationship with Africa has transformed into one defined by a dynamism and African agency, thereby lessening the hold the former previously had on Africa in the early days of this evolving alliance. First, the authors will conduct a literature review of historical Sino–African relations, from the early Han dynasty to its contemporary manifestations. The second section will continue with this analysis by focusing exclusively on the status quo of the Sino–African economic relationship, including analysis of trade flows, investments, development, economic cooperation, and Chinese support for regional integration. Finally, this paper will conclude with an elaboration of some key, emerging relationship areas, such as opportunities for China and Africa to collaborate on the achievement of the latter’s Agenda 2063 and African Mining Vision.     

A Cross-Cultural Perspective on the Relationships between Emotional Separation,Parental Trust,and Identity in Adolescents

Emotional separation and parental trust in parent–adolescent relationships are important factors for adolescent identity formation. However, prior research findings on emotional separation are inconsistent. This study aimed to conduct a more rigorous examination of the associations of emotional separation and parental trust with identity synthesis, confusion, and consolidation by applying a bi-factor model to identity, using adolescent samples from Lithuania (N?=?610; 53.9% female; M _age ?=?14.92), Italy (N?=?411; 57.4% female; M _age ?=?15.03), and Japan (N?=?759; 43.7% female; M _age ?=?14.13). Structural equation modeling revealed that emotional separation and parental trust were consistently associated with identity consolidation across the three countries, rather than associated with identity synthesis and identity confusion. Furthermore, the patterns of associations of emotional separation and parental trust with identity synthesis and identity confusion differed across the three nations. Overall, this study provides a better understanding of the role of emotional separation and parental trust in adolescent identity formation by suggesting the importance of the identity consolidation in the association between parent–child relationships and identity formation across three countries.     

Histopathological,histochemical and biochemical postmortem changes in induced fatal hypothermia in rats

Reaching a postmortem diagnosis of hypothermia is challenging in forensic practice. Therefore, this study was conducted to detect the histopathological, histochemical and biochemical changes that occur in adult albino rats following exposure to induced fatal hypothermia. Twenty-four adult albino rats were divided into the negative control, moderate hypothermia, severe hypothermia and hypoxia groups. Rats in the control group were euthanized when those in the moderate hypothermic group died. Blood samples were collected via heart puncture, and the cerebrum, heart, suprarenal gland, kidney, liver and skeletal muscle were removed to investigate the biochemical, histochemical and histopathological changes. Postmortem assessment depicted significant changes in lipid peroxidation, represented by increased malondialdehyde levels in the studied organs of the rats in hypothermic and hypoxia groups. Histopathological examination of the rats’ organs revealed degeneration and necrosis in the hypothermia and hypoxia groups. Sections taken from the severe hypothermic rats revealed a loss of normal cardiac tissue architecture, necrotic changes in the pyramidal cells in the cerebral cortex, and massive necrosis, mainly in the tubules of the renal cortex and medulla. These findings suggest that histological changes might be used as biochemical markers for postmortem diagnosing of fatal hypothermia, particularly in severe hypothermic conditions.

Key points

• Death by hypothermia is a serious public health problem worldwide.
• Confirming a diagnosis and determining the cause of death in cases of hypothermia are among the most difficult practices in forensic medicine.
• Death by hypothermia might be associated with structural abnormalities in various organs.
• Studies using different tissue staining techniques will enable an overall illustration of the role of histopathological changes in body organs as indicators of hypothermia.

     

Foreign investment in Africa: Challenges and benefits

Foreign direct investment in Africa has not sparked the benefits that policy makers had hoped for. This article looks at some of the problems that are preventing this growth and highlights the positive developments in parts of the continent.     

Phylogenetic relationship of psychoactive fungi based on rRNA gene for a large subunit and their identification using the TaqMan assay (II)

"Magic mushroom (MM)" is the name most commonly given to psychoactive fungi containing the hallucinogenic components: psilocin (1) and psilocybin (2). We investigated the rRNA gene (internal transcribed spacer (ITS) and large subunit (LSU)) of two Panaeolus species and four Psilocybe species fungi (of these, two are non-psilocybin species). On the basis of sequence alignment, we improved the identification system developed in our previous study. In this paper, we describe the new system capable of distinguishing MMs from non-psilocybin Psilocybe species, its application data and the phylogeny of MM species.