A fast ultrasound-assisted extraction procedure for trace elements determination in hair samples by ICP-MS for forensic analysis

An ultrasound-assisted extraction method is proposed for the determination of trace elements in hair samples by inductively coupled plasma-mass spectrometry (ICP-MS) for forensic investigation. Prior to analysis, 25 mg of hair samples were accurately weighed into (15 mL) conical tubes. Then, 2 mL of 20% HNO₃ is added to the samples, sonicated at 2 min (50 W, 100% amplitude), and then further diluted to 10 mL with Milli-Q water. Resulted diluted slurries are centrifuged and the analytes are directly determined in the supernatant. Calibrations against aqueous solutions were carried out with rhodium as internal standard. The method was successfully applied for the extraction of Al, As, Ba, Be, Cd, Co, Cr, Cu, Mn, Pb, Tl, U, V and Zn with a method detection limit (3 s, n = 20) of 0.1, 0.4, 0.2, 0.09, 0.08, 0.04, 0.1, 2.9, 1.0, 0.9, 0.04, 0.05, 0.1 and 4.2 ng/g, respectively. Method accuracy is traceable to Certified Reference Materials (CRMs) 85 and 86 human hair from the International Atomic Energy Agency (IAEA). Additional validation data are provided based on the analysis of hair samples from the trace elements intercomparison program operated by the Institut National de Sante’ Publique du Quebec, Canada. The proposed method is very simple and can be applied for forensic purposes with the elimination of sample digestion step prior to analysis. Then, a considerable improvement in the sample throughput is archived with the use of the proposed method.     

Going Nordic—Can the Nordic model tackle grand challenges and be a beacon to follow?

Nordic countries are known for having extensive welfare services, a highly compressed wage structure owing to strong social partners, as well as effective regulation and governance in public administration. Various typologies capture aspects of the institutional features of families of nations across various policy areas, showing that there is a specific Nordic variant of political economy. While there is an extensive literature focusing on socio-economic outcomes in the Nordic countries, there is less scholarly focus on the linkages between the regulatory processes, and their policy output, in response to various challenges. This volume examines how exogenous challenges (market liberalization promoted by EU integration and the gig economy, as well as the COVID-19 pandemic) and endogenous challenges in the welfare state (regulation of child-care quality and retirement ages) are tackled in a selection of Nordic countries. After a bibliometric analysis on the state of the literature, features of the Nordic model are presented. Then, the contributions of the articles to the special issue are summarized, after which lessons for other models of political economy are pinpointed. We find that although there is high variation within the Nordics in the studies of the special issue, there is a trend whereby, over time, a broader range of actors involved in the policy and regulatory process. Although not perfect, challenges are solved incrementally and often at an early stage. In other words, the Nordic regulatory model is highly adaptable to different challenges. Thus, the Nordic model does present crucial lessons for other types of political economy.     

Costs and recovery rates in the Dutch liquidation-based bankruptcy system

We present evidence on the efficiency of the resolution of financial distress in bankruptcy in The Netherlands. Direct costs average 16%, firm recovery 37% and bank debt recovery 80%. The direct costs are lower in larger firms and in firms with more bank debt. Costs increase with the time it takes to sell assets. Firm recovery is influenced by asset structure, capital structure and to a lesser extent Dutch legal variables. However, the opportunity to continue operations in bankruptcy is chosen by about half the firms and this has a positive effect on recoveries.

The Multiple Bases of Social Return Platforms: Evidence of a Brazilian Initiative

The literature on platforms emphasizes the balance between supply and demand as precursors to network expansion, strategy development and strategy sustainability. This study questions this logic through the exploratory approach of a public platform based on social returns. Results demonstrate that when an institutional force supports a platform concerned with diffuse and collective interests, it is possible that the strategy could sustain and develop without the balance of its forces. The study contributes to the strategic platform literature by pointing out the distinct aspects of social platforms and underlining the support generated by institutions.     

Contesting ‘sex’ and ‘gender’ difference in emotions through music use in the UK

This article builds on social psychological critiques of ‘hardwired’ gender difference in emotions, looking at the topic through the emotional use of music. Starting from the premise that gender differences in emotion are socially and discursively constructed rather than innate, it moves on to challenge existing work in which masculinity and femininity are treated as singular, oppositional concepts, that are ‘normally’ attached to ideas of existing sex differences. Drawing on data, generated from a UK-based online survey of 914 respondents (male = 361; female = 553), this article highlights that whilst gender plays a significant part in shaping the emotional experience of music, this is often mediated heavily by age and personal experience. It suggests that music is a practical means of moving beyond ideas of differences in gender or sex differences in emotional display, towards ideas of diversity, especially given that existing face-to-face research has often found men to be ‘unable’ to communicate emotional experience in particular ways. Both inductive quantitative trends and open-ended fragments from people's emotional experiences of music are included in order to demonstrate how emotions and gender intersect discursively.     

Programme Participation Intensity and Children’s Nutritional Status: Evidence from a Randomised Control Trial in Mozambique

Abstract

Agricultural interventions are thought to have the potential to improve nutrition, but little rigorous evidence is available about programmes that link the two. In this article, we study impacts of an integrated agricultural and nutritional biofortification project, the REU in Mozambique. We first provide evidence on dietary impacts of the programme and then examine impacts of the programme by participation intensity. Using OLS and IV techniques, we find that more intense participation in both project components led to larger impacts. The results therefore have important implications for refining the design of future projects attempting to link agricultural and nutrition interventions.