Méditation pleine conscience chez les adolescents : quels liens avec la régulation des émotions et les fonctions exécutives ?

La régulation des émotions est une compétence primordiale durant l’adolescence et serait sous-tendue par les fonctions exécutives. Elle peut se faire à travers différentes stratégies, certaines étant considérées comme plus adaptatives que d’autres, comme la réévaluation cognitive comparativement à la suppression expressive. La pratique de la méditation pleine conscience s’avère bénéfique au développement de cette compétence. Cette étude visait ainsi à investiguer si une intervention de pleine conscience de 9 semaines délivrée en milieu scolaire auprès d’adolescents permettait d’augmenter la fréquence d’utilisation auto-rapportée de la réévaluation cognitive, et si ceci passait par une amélioration des fonctions exécutives, mesurées par des tâches cognitives informatisées. Les résultats n’ont pas permis de démontrer les effets attendus. Comparativement à un groupe contrôle actif, la méditation n’a pas permis d’augmenter la fréquence d’utilisation de la réévaluation cognitive et d’améliorer les fonctions exécutives de façon significative. L’absence d’effet et les limites de l’étude sont discutées.</p

Effect of hydrogen evolution reaction on morphology and crystal structure of electrolytically produced copper powder particles

Morphologies of copper powder particles obtained by potentiostatic regime of electrolysis under different hydrogen evolution conditions were correlated with their crystal structure. In the dependence of quantity of evolved hydrogen, the either dendritic or cauliflower-like particles were formed. In the both types of the particles, Cu crystallites were random oriented. This random orientation is ascribed to the existence of the spherical morphology and to similar morphology at the micro level, because the both types of particles were constructed from small agglomerates of approximately spherical Cu grains at the micro level. The particle size distribution (PSD) of the obtained particles is also examined and it was shown the strong effect of the shape and size of particles on it, with a tendency of the decrease of particle size with increasing the overpotential of electrolysis.Morfologije praškastih čestica bakra dobijene potenciostatskim režimom elektrolize pod različitim uslovima izdvajanja vodonika su korelisane sa njihovom kristalnom strukturom. U zavisnosti od količine izdvojenog vodonika, formirane su ili dendritične ili karfiolaste čestice. U oba tipa čestica, kristaliti bakra su bili slučajno orijentisani. Ova slučajna orijentacija je pripisana postojanju sferične morfologije i sličnoj morfologiji na mikro nivou, zato što oba tipa čestica su bila izgrađena od malih aglomerata približno sferičnih zrna bakra na mikro novou. Raspodela veličine čestica (PSD) dobijenih čestica je takođe ispitana i pokazan je strog uticaj oblika i veličine čestica na raspodelu, sa tendencijom smanjenja veličine čestica sa povećavajućom prenapetošću elektrolize

Factors Predicting Malignant Occurrence and Polyp Recurrence after the Endoscopic Resection of Large Colorectal Polyps: A Single Center Experience

Background: The aim of this study was to identify risk factors contributing to the malignancy of colorectal polyps, as well as risk factors for recurrence after the successful endoscopic mucosal resection of large colorectal polyps in a referral center. Materials and Methods: This retrospective cohort study was performed in patients diagnosed with large (&ge;20 mm diameter) colorectal polyps and treated in the period from January 2014 to December 2019 at the University Hospital Medical Center Bezanijska Kosa, Belgrade, Serbia. Based on the endoscopic evaluation and classification of polyps, the following procedures were performed: en bloc resection, piecemeal resection or surgical treatment. Results: A total of 472 patients with large colorectal polyps were included in the study. The majority of the study population were male (62.9%), with a mean age of 65.7 &plusmn; 10.8 years. The majority of patients had one polyp (73.7%) less than 40 mm in size (74.6%) sessile morphology (46.4%), type IIA polyps (88.2%) or polyps localized in the descending colon (52.5%). The accessibility of the polyp was complicated in 17.4% of patients. En bloc resection was successfully performed in 61.0% of the patients, while the rate of piecemeal resection was 26.1%. Due to incomplete endoscopic resection, surgery was performed in 5.1% of the patients, while 7.8% of the patients were referred to surgery directly. Hematochezia (p = 0.001), type IIB polyps (p &lt; 0.001) and complicated polyp accessibility (p = 0.002) were significant independent predictors of carcinoma presence in a multivariate logistic regression analysis. Out of the 472 patients enrolled in the study, 364 were followed after endoscopic resection for colorectal polyp recurrence, which was observed in 30 patients (8.2%) during follow-up. Piecemeal resection (p = 0.048) and incomplete resection success (p = 0.013) were significant independent predictors of polyp recurrence in the multivariate logistic regression analysis. Conclusions: Whenever an endoscopist encounters a complex colorectal lesion (i.e., a polyp with complicated accessibility), polyp size &gt; 40 mm, the Laterally Spreading Tumor nongranular (LST-NG) morphological type, type IIB polyps or the presence of hematochezia, malignancy risk should be considered before making the decision to either resect, refer to an advanced endoscopist or perform surgery

Fit-for-Purpose Quality Control System in Continuous Bioanalysis during Long-Term Pediatric Studies (vol 21, 104, 2019)

The LENA collaborator list below was not included in the original article.s.status: publishe

Firefly: The Case for a Holistic Understanding of the Global Structure and Dynamics of the Sun and the Heliosphere

This white paper is on the HMCS Firefly mission concept study. Firefly focuses on the global structure and dynamics of the Sun's interior, the generation of solar magnetic fields, the deciphering of the solar cycle, the conditions leading to the explosive activity, and the structure and dynamics of the corona as it drives the heliosphere

Genomic reconstruction of the SARS-CoV-2 epidemic in England

AbstractThe evolution of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus leads to new variants that warrant timely epidemiological characterization. Here we use the dense genomic surveillance data generated by the COVID-19 Genomics UK Consortium to reconstruct the dynamics of 71 different lineages in each of 315 English local authorities between September 2020 and June 2021. This analysis reveals a series of subepidemics that peaked in early autumn 2020, followed by a jump in transmissibility of the B.1.1.7/Alpha lineage. The Alpha variant grew when other lineages declined during the second national lockdown and regionally tiered restrictions between November and December 2020. A third more stringent national lockdown suppressed the Alpha variant and eliminated nearly all other lineages in early 2021. Yet a series of variants (most of which contained the spike E484K mutation) defied these trends and persisted at moderately increasing proportions. However, by accounting for sustained introductions, we found that the transmissibility of these variants is unlikely to have exceeded the transmissibility of the Alpha variant. Finally, B.1.617.2/Delta was repeatedly introduced in England and grew rapidly in early summer 2021, constituting approximately 98% of sampled SARS-CoV-2 genomes on 26 June 2021.</jats:p