1,720,957 research outputs found
an untargeted metabolomics approach to characterize metabolic changes during E-waste recycling
Get PDFFunding Information: HBM4EU E-Waste Study Team: The HBM4EU e-waste study team consists of Kukka Aimonen l, Lasma Akulova m, Radia Bousoumah n, Argelia Casta\u00F1o o, Adam Clarke p, Adrian Covaci q, Maurice van Dael c, Marta Esteban L\u00F3pez o, Thomas G\u00F6eno c, Martien Graumans c, Ogier Hanser n, Beata Janasik r, Kate Jones p, Laura Komarovska m, Sirpa Laitinen l, Henriqueta Louro s, Carla Martins b, Linda Matisane m, Inese Martinsone m, Rodrigo Moreira u, Darren Musgrove p, Maria-Mirela Ani d, Maria Torres Toda f, Ana Nogueira s, Linda Paegle m, Herm\u00EDnia Pinhal s, Tiina Rantio l, S\u00EDlvia Reis Santos s, Edna Ribeiro t, Joanna R\u00F3g a, Anita Seile m, Marina Silva t, S\u00EDlvia Reis Santos s, Marjo V\u00E4nsk\u00E4 l, Riitta Velin l, C\u00E9lia Ventura j,u and Wojciech Wasowicz r., Affiliations of these authors can be found in Supplementary material S3. Funding Information: This work has received external funding from the European Union\u2019s Horizon 2020 research and innovation program under grant agreement No. 733032 and received co-funding from the author\u2019s organizations and/or Ministries. In addition, the Finnish Work Environment fund provided funding (grant no. 200345). The publication was financed by the Science Development Fund of the Warsaw University of Life Sciences \u2013 SGGW. Publisher Copyright: © 2025 The Author(s)E-waste contains hazardous chemicals that may be a direct health risk for workers involved in recycling. We conducted an untargeted metabolomics analysis of urine samples collected from male e-waste processing workers to explore metabolic changes associated with chemical exposures in e-waste recycling in Belgium, Finland, Latvia, Luxembourg, the Netherlands, Poland, and Portugal. Questionnaire data and urine samples were obtained from workers involved in the processing of e-waste (sorting, dismantling, shredding, pre-processing, metal, and non-metal processing), as well as from controls with no known occupational exposure. Pre- and post-shift urine samples were collected and analysed using ultrahigh-performance liquid chromatography-mass spectrometry (UPLC-MS). A total of 32 endogenous urinary metabolites were annotated with a Variable Importance in Projection (VIP) above 2, indicating that e-waste recycling is mainly associated with changes in steroid hormone and neurotransmitter metabolism, energy metabolism, bile acid biosynthesis, and inflammation. The highest VIP was observed for dopamine-o-quinone, which is linked to Parkinson's disease. These and other changes in metabolism in workers employed in the processing of e-waste need further verification in targeted studies.publishersversionpublishe
The HBM4EU e-waste study: exploratory survey of worker’s exposure to toxic contaminants
No full textHBM4EU E-Waste Study Team: Kukka Aimonen, Lasma Akulova, Rob Anzion, Radia Bousoumah, Argelia Castaño, Adam Clarke, Maurice van Dael, Marta Esteban López, Martien Graumans, Ogier Hanser, Beata Janasik, Kate Jones, Laura Komarovska, Sirpa Laitinen, Inese Martinsone, Linda Matisane, Rodrigo Moreira, Darren Musgrove, An van Nieuwenhuyse, Ana Nogueira, Linda Paegle, Hermínia Pinha, Tiina Rantio, Sílvia Reis Santos, Edna Ribeiro, Anita Seile, Ovnair Sepai, Marina Silva, Marjo Vänskä, Riitta Velin, Célia Ventura and Wojciech WasowiczSo far, human biomonitoring (HBM) has not been much used to study exposure of workers involved in the processing of e-waste in the EU. In this study we aimed to explore exposures of workers to chemical contaminants, contribute to raise awareness of potential hazards and to further improve work practices. The study was conducted in eight European counties in a target population of 195 exposed and 73 controls. Biomarkers of exposure were used for selected metals and organic contaminants. Occupational hygiene sampling methods and contextual information were collected to facilitate the interpretation of the biomarker results. We found somewhat elevated exposures in workers for cadmium and mercury in blood and urine compared to controls. Blood analysis indicated high lead levels in post-shift compared to pre-shift in battery workers. Some urinary phthalate metabolite levels indicated a contribution from work-related exposures and were more pronounced in battery workers. Only small differences were observed in urinary excretion before and after the shift for organophosphorus flame retardants. Brominated flame retardant and PCB serum levels were in the range of general population background. From this exploratory study we conclude that more studies are needed to better understand chemical exposure in the processing of e-waste.This study was funded by the European Union’s Horizon 2020 research and innovation program under grant agreement No. 101057014 and co-funded by the author’s institutes and/or Ministries.info:eu-repo/semantics/publishedVersio
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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