Drawing on ten studies from PIRLS, PISA and TIMSS, we study social inequalities in school belonging in the context of early tracking. We investigate whether a) there are social inequalities in school belonging b) early tracking has an effect on levels of school belonging c) tracking exacerbates social inequalities with respect to school belonging. We constructed a large database which covers a wide range of countries and representative student populations in both primary and secondary schools. We exploit that no country tracks their students in primary school and use a difference-in-differences approach to study the effect of tracking. Our findings show a positive association between students' socioeconomic status and school belonging but no effect for tracking. Likewise, we found no evidence that tracking exacerbates social inequalities in school belonging. Multiverse analysis underlines the general robustness of these findings.
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http://dx.doi.org/10.1016/j.ssresearch.2024.103075 | DOI Listing |
World J Microbiol Biotechnol
January 2025
Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
Poly(3-hydroxybutyrate) (PHB) is a biodegradable polymer that belongs to a group of polymers called polyhydroxyalkanoates (PHAs). PHB can be synthesized from renewable resources, making it a promising alternative to petroleum-derived plastics. It is also considered non-toxic, biodegradable, and biocompatible, which makes it suitable for various applications in the medicine and biomedicine.
View Article and Find Full Text PDFFood Chem
January 2025
Laboratory of Viticulture, School of Agriculture, Faculty of Agriculture Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
A non-targeted analytical approach using gas chromatography-mass spectrometry (GC-MS) is proposed for the analysis of the free and bound volatile fractions of three emblematic indigenous Greek white winegrape varieties belonging to Vidiano, Malagousia, and Savvatiano and establish volatile varietal markers using multivariate chemometrics. A total of 89 free and 103 bound volatile compounds were identified, categorized into alcohols, aldehydes, esters, acids, terpenes, norisoprenoids, C6 compounds, phenols, and ketones. A robust Partial Least Squares Discriminant Analysis (PLS-DA) prediction model was developed and validated, and successfully classified the grape samples according to the variety with 100 % accuracy, demonstrating the potential of volatile profiling as a non-targeted fingerprinting approach for varietal discrimination.
View Article and Find Full Text PDFDiarrhea is a global public health problem that is the third leading cause of death in under five years, with an estimated 1.7 billion cases in 2023 and 1.8 million deaths from diarrhea diseases every year.
View Article and Find Full Text PDFRice (N Y)
January 2025
Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi, 464-8601, Japan.
Enhancing nitrogen (N) fixation in rice plants can reduce N fertilizer application and contribute to sustainable rice production, particularly under low-N conditions. However, detailed microbial and metabolic characterization of N fixation in rice stems, unlike in the well-studied roots, has not been investigated. Therefore, the aim of this study was to determine the active N-fixing sites, their diazotroph communities, and the usability of possible carbon sources in stems compared with roots.
View Article and Find Full Text PDFActa Microbiol Immunol Hung
January 2025
1Department of Biomedical Sciences, Faculty of Health Sciences, International Hellenic University, 57400 Thessaloniki, Greece.
The spread of NDM-1-harboring Klebsiella pneumoniae is a worldwide concern. In this study the whole-genome sequence (WGS) of a carbapenem- and colistin-resistant K. pneumoniae 838Gr strain is presented.
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