Avoir les étudiants de sciences de la nature dans notre MIRES.

Titre de l'écran-titre (visionné le 23 avril 2009).Bibliogr

Avoir les étudiants de sciences de la nature dans notre MIRES.

Titre de l'écran-titre (visionné le 23 avril 2009)

Comparative Assessment of Soil Contamination by Lead and Heavy Metals in Riparian and Agricultural Areas (Southern Québec, Canada)

Soils contaminated with hydrocarbons (C10–C50), PAHS, lead and other heavy metals were recently found in the banks of two major rivers in southern Québec. Alluvial soils are contaminated over a distance of 100 kilometers. Eight sampling sites, including some located in agriculture areas (farm woodlots) have been selected to compare air pollution (aerosol fallout and rainout) and river pollution values. The concentrations detected in soil profiles for As, Cd and Pb vary between 3.01 to 37.88 mg kg−1 (As), 0.11 to 0.81 mg kg−1 (Cd) 12.32 to 149.13 mg kg−1 (Pb). These metallic elements are considered highly toxic and can harm wildlife and human health at high levels. The maximum concentration of Pb (149.13 mg kg−1) in soils of the riparian zone is twelve times higher than the average Pb concentration found in a natural state evaluated at 15.3 mg kg−1 (SD 17.5). Pb concentrations in soils of agricultural areas (woodland control sites) range between 12 and 22 mg kg−1, and given that these values are recorded in surrounding cultivated land, the issue of the quality of agricultural products (crops and forage) to feed livestock or destined for human consumption must be further addressed in detail

Personal and social support factors involved in students' decision to participate in formal academic mentoring

In this study, we examined the role of personal and social support factors involved in students’ decision to participate in formal academic mentoring. Three hundred and eighteen students completing Grade 11 and planning to study sciences in college filled out a questionnaire and were then asked to participate in an academic mentoring program during their first year of college. A total of 150 students agreed to take part in this program (volunteers) and 168 declined the offer (non-volunteers). The overall findings support the hypothesis that academic mentoring is more attractive for some students than others depending on their personality, help-seeking attitudes, academic dispositions, perceived support from friends, and support available during the transition to college. These findings were discussed in light of the different mechanisms proposed by mentoring and social support literatures

Impact of a college student academic mentoring program on perceived parental and teacher educational involvement

This article examines the hypothesis that academic mentoring of college students improves perceived parental and teacher educational involvement. College students were randomly assigned to a 1-year academic mentoring program (protégés, n = 150) or a control group (n = 167) and completed questionnaires before, during, and after the intervention. Protégés perceived greater levels of parent and teacher educational involvement than did participants from the control group. However, the impact of the mentoring program on perceived parental involvement was found only among students who reported a secure relationship with their parents. Additional analyses suggest that some of these improvements were related to quality of the working alliance between mentors and protégés and to supportive behaviors exhibited by mentors during the intervention.jasp_934 2137..216

Academic mentoring and dropout prevention for students in math, science and technology

In this study, we examined the impact of a new academic mentoring program aimed at preventing student dropout in math, science and technology. The MIRES program entails bimonthly meetings between students entering college and university students completing their undergraduate degree in science and engineering. A randomized pretest-posttest control group design was used to evaluate the program’s short-term impact. At the end of the program, mentees (n = 150) presented significantly higher levels of motivation, a more positive career decision profile and enhanced institutional attachment and social adjustment than students in the control group (n = 157). MIRES mentees also showed success and persistence rates (mainly male participants) that were significantly higher than those of students in the control group

Cross-Sectional Assessment of Achievement of Therapeutic Goals in a Canadian Multidisciplinary Clinic for Patients With Advanced Chronic Kidney Disease

Background: The implementation of advanced chronic kidney disease (CKD) multidisciplinary clinics has now demonstrated their effectiveness in delaying and even avoiding dialysis for patients with CKD. However, very little has been documented on the management and achievement of targets for a number of parameters in this context. Objective: Our goal was to assess our multidisciplinary clinic therapy performance in relation to the targets for hypertension, anemia, and calcium phosphate assessment. Methods Design and setting: A cross-sectional descriptive study was conducted with a cohort including all patients followed up in our multidisciplinary clinic in July 2014. Measurements: Comorbidity, laboratory, and clinical data were collected and compared with the recommendations of scientific organizations. Results: The cohort included 128 patients, 37.5% of whom were women. Mean follow-up time was 26.6 ± 25.1 months and mean estimated glomerular filtration rate (eGFR) was 14.0 ± 4.7 mL/min/1.73 m 2 . A total of 24.2% of patients with diabetes achieved blood pressure targets of <130/80 mm Hg, while 56.5% of patients without diabetes achieved targets of <140/90 mm Hg. Hemoglobin of patients treated with erythropoiesis-stimulating agents was 100 to 110 g/L in 36.2% of the patients, below 100 for 39.7% of them, and above 110 for 24.1%, whereas 67.2% were within the acceptable limits of 95 to 115 g/L. In addition, 63.4% of patients had a serum phosphate of <1.5 mmol/L, and 90.9% of patients had total serum calcium <2.5 mmol/L. Limitations: Our study is a single center study with the majority of our patients being Caucasian. This limits the generalizability of our findings. Conclusion: The control rates of various parameters were satisfactory given the difficult clinical context, but could be optimized. We publish these data in the hope that they are helpful to others engaged in quality improvement in their own programs or more generally

Concevoir une formation par concordance pour développer le raisonnement professionnel : quelles étapes faut-il parcourir ?

Contexte : Développer le raisonnement est une nécessité dans la formation des professionnels de la santé. La formation par concordance (FpC) est une approche pédagogique qui place les apprenants dans des situations authentiques. Les questions posées sont celles que se posent les professionnels dans leur pratique et les réponses sont comparées à celles qu’ont données les membres d’un panel de référence. But : Décrire les variables dont il est nécessaire de tenir compte pour concevoir une FpC. Méthodes : Ces variables sont au nombre de six : 1) les buts de l’activité pédagogique ; 2) la nature de la tâche ; 3) le contenu et le niveau de complexité ; 4) le panel de référence ; 5) les rétroactions ; 6) l’environnement numérique d’apprentissage. Résultats : Les exemples illustrés dans cet article permettent de constater la versatilité de cette approche pour mettre l’accent sur les divers éléments critiques au raisonnement de diverses professions. Conclusion : Les exemples présentés illustrent comment il est possible de mettre au point des outils de FpC qui se prêtent à l’amélioration à chaque itération. Il est désormais possible d’imaginer qu’un jour cette approche à la formation fera partie importante de toute formation professionnelle

Transmission of Induced Chromosomal Aberrations through Successive Mitotic Divisions in Human Lymphocytes after In Vitro and In Vivo Radiation

International audienceThe mechanisms behind the transmission of chromosomal aberrations (CA) remain unclear, despite a large body of work and major technological advances in chromosome identification. We reevaluated the transmission of CA to second- and third-division cells by telomere and centromere (TC) staining followed by M-FISH. We scored CA in lymphocytes of healthy donors after in vitro irradiation and those of cancer patients treated by radiation therapy more than 12 years before. Our data demonstrate, for the first time, that dicentric chromosomes (DCs) decreased by approximately 50% per division. DCs with two centromeres in close proximity were more efficiently transmitted, representing 70% of persistent DCs in ≥M3 cells. Only 1/3 of acentric chromosomes (ACs), ACs with four telomeres, and interstitial ACs, were paired in M2 cells and associated with specific DCs configurations. In lymphocytes of cancer patients, 82% of detected DCs were characterized by these specific configurations. Our findings demonstrate the high stability of DCs with two centromeres in close proximity during cell division. The frequency of telomere deletion increased during cell cycle progression playing an important role in chromosomal instability. These findings could be exploited in the follow-up of exposed populations