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21.
Effect of physiological harvest stages on the composition of bioactive compounds in Cavendish bananas 总被引：1，自引：0，他引：1
Christelle Bruno Bonnet Olivier Hubert Didier Mbeguie-A-Mbeguie Dominique Pallet Abel Hiol Max Reynes Patrick Poucheret 《Journal of Zhejiang University. Science. B》2013,14(4):270-278
The combined influence of maturation, ripening, and climate on the profile of bioactive compounds was studied in banana (Musa acuminata, AAA, Cavendish, cv. Grande Naine). Their bioactive compounds were determined by the Folin-Ciocalteu assay and high-performance thin layer chromatographic (HPTLC) method. The polyphenol content of bananas harvested after 400 degree days remained unchanged during ripening, while bananas harvested after 600 and 900 degree days exhibited a significant polyphenol increase. Although dopamine was the polyphenol with the highest concentration in banana peels during the green developmental stage and ripening, its kinetics differed from the total polyphenol profile. Our results showed that this matrix of choice (maturation, ripening, and climate) may allow selection of the banana (M. acuminata, AAA, Cavendish, cv. Grande Naine) status that will produce optimal concentrations of identified compounds with human health relevance. 相似文献
22.
Christine Deasy Barry Coughlan Julie Pironom Didier Jourdan Patricia Mannix-McNamara 《Irish Educational Studies》2016,35(2):175-194
Psychological distress as experienced by higher education students is of major concern because of its potential to adversely impact academic performance, retention, mental health and lifestyle. This paper reports a mixed method investigation of student self-reported psychological distress and help-seeking behaviour. The sample comprised all students (n?=?1557) registered on undergraduate nursing/midwifery and teacher education programmes at an Irish university. Participants (n?=?1112) completed the General Health Questionnaire (GHQ) to determine their self-reported psychological distress and the Lifestyle Behaviour Questionnaire to examine sources of distress, lifestyle and demographic variables. Individual interviews (n?=?59) explored student experiences of psychological distress and their help-seeking behaviours. Forty two percent of respondents exceeded the GHQ threshold ≥5, which signifies risk of mental or physical health problems. Sources of distress included academic, financial and psychosocial stressors. Regression analysis identified that demographic, programmatic and lifestyle variables predicted GHQ scores. Despite the distress experienced, students were reluctant users of support services. Many actively avoided seeking help. These findings raise serious concerns about the extent of psychological distress among this population. They also alert education providers to be vigilant for student psychological distress and to provide effective interventions, cognisant of the impact of stigma on help seeking. 相似文献
23.
L'introduction des technologies de l'information et de la communication (TIC) dans les pratiques éducatives s'accompagne d'un questionnement foisonnant sur les effets attendus et potentiels de ces outils sur l'apprentissage et les relations pédagogiques entre apprenants et enseignants. C'est dans ce cadre que s'inscrit l'appel d'offres lancé en mai 1998 par le Comité National de Coordination de la Recherche en éducation (CNCRE, France), appel comprenant ces deux questions: 'Comment les technologies de l'information et de la communication sont-elles utilisées dans le système éducatif? Modifient-elles la nature, les contenus et les modalités des apprentissages, ainsi que les acquis, le rapport au savoir et les attitudes des élèves, des étudiants et des enseignants?' L'appel préconisait de répondre À ces questions en faisant une revue synthétique de la littérature internationale disponible sur ce champ. Cet article s'attache À présenter la manière dont notre équipe, retenue par cet appel d'offres, a traité de cette problématique générale. (Paulette Bernhard (Ecole de Bibliothéconomie et des Sciences de l'Information de Montréal, Québec); Patrick Bompard (Institut de l'Homme et de la Technologie, France); Hughes Choplin (Département Innovation Pédagogique, Ecole Nationale Supérieure des Télecommunications, France); Nicole Cortesi-Grou (Ecole Nationale Supérieure des Télecommunications, France); Sonia Lefebvre (Université de Trois Rivières, Québec); Didier Paquelin (Université de Bordeaux III, France); Serge Pouts-Lajus (Observatoire des Technologies pour l'Education en Europe, Paris); Jean-FranÇois-Rouet (Université de Poitiers, France). New media and pedagogic innovation: the hypothesis for a transitional system. The introduction of information and communication technologies (ICT) into educational practices has been accompanied by much questioning about the expected effects and the potential of these tools with respect to teaching and training, and the pedagogic relationships between teachers and learners. It was within this framework that a call for offers was announced in May 1998 by the National Committee for Coordination of Research into Education (CNRE – France), a call which consisted of two questions: 'How is ICT used in the educational system?' and 'Does it modify the nature, the contents and the modes of training and education, as well as the acquisition, the rapport with knowledge and the attitudes of pupils, students and teachers?' The call recommended that the response to these questions should be made by making a synthesis of international literature available in the field. This article sets out to present the way in which our team, formed because of this call for offers, has dealt with this general problem. Neue Medien und pädagogische Innovation : die Hypothese von einem Uebergangssystem. Die Einführung der Informations- und Kommunikationstechnologien (ICT) in der pädagogischen Praxis wird begleitet von vielen Fragen über erwartete und potentielle Auswirkungen auf die Bildung, und die pädagogische Beziehung zwischen Lehrern und Schülern. Sie bewegen sich im Rahmen eines Aufrufs vom Mai 1998 durch das 'Comité National de Coordination de la Recherche en Education' (CNCRE – Frankreich), der zwei Fragen beinhaltete : " Wie werden die neuen Informations- und Kommunikationstechnologien im Bildungssystem eingesetzt ? " und " Verändern sie die Art, die Inhalte, und die Modalitäten der Bildung, die pädagogischen Errungenschaften, die Beziehung zu Wissen, die Einstellung der Schüler, Studenten, und Lehrkräfte ? " Zur Beantwortung der Fragen, empfahl der Aufruf eine zusammenfassende Ausarbeitung über die international verfügbare Literatur auf diesem Gebiet. Dieser Artikel präsentiert, wie unsere Arbeitsgruppe, ermuntert durch den Aufruf, diese allgemeine Problematik angegangen ist. 相似文献
24.
Thibault Deschamps Déborah Nourrit Nicolas Caillou Didier Delignières 《Journal of sports sciences》2013,31(9):867-874
The aim of this study was to assess the effect of stress on a previously acquired motor coordination. Following a longitudinal learning experiment, four participants performed oscillations on a ski simulator, either in normal or stressful conditions. The results showed that the amplitude of the oscillations decreased under stress, but no significant effect was seen regarding coordination, suggesting the strong resistance to stress of overlearned behaviour. Nevertheless, for one participant, a transient regression towards a former stage of learning was observed. This result was consistent with the regression hypothesis formulated by Fuchs (). 相似文献
25.
Abstract In this study, we assessed arm coordination in the backstroke over increasing speeds by adapting the index of coordination originally used in the front crawl. Fourteen elite male backstroke swimmers swam four trials of 25 m at the speeds corresponding to the 400-m, 200-m, 100-m, and 50-m events. The six phases of the arm stroke were identified by video analysis and then used to calculate the index of coordination, which corresponded to the time between the propulsive phases of the two arms. With increases in speed, the elite swimmers increased the stroke rate, the relative duration of their arm pull, and their index of coordination, and decreased the distance per stroke (P < 0.05). Arm coordination was always in catch-up (index of coordination of ?12.9%) because the alternating body-roll and the small shoulder flexibility did not allow the opposition or superposition coordination seen in the front crawl. This new method also quantified the relative duration of the hand's lag time at the thigh, which did not change (～2%) with increasing speed for the elite swimmers. The index of coordination enables coaches to assess mistakes in backstroke coordination, particularly in the hand's lag time at the thigh. 相似文献
26.
In this paper, we present and discuss the results of a survey of how corporate social responsibility (CSR) is being discussed and taught in engineering education in France. We shall first describe how those questions have been recently tackled in various programmes of higher education in France. We shall also analyse what faculty members have to say about their motivation or reluctance to enhance these new topics in their teaching. While this survey covered various fields of higher education, in this present, we mostly discuss the issues surrounding CSR teaching in engineering education. 相似文献
27.
In this study, we assessed arm coordination in the backstroke over increasing speeds by adapting the index of coordination originally used in the front crawl. Fourteen elite male backstroke swimmers swam four trials of 25 m at the speeds corresponding to the 400-m, 200-m, 100-m, and 50-m events. The six phases of the arm stroke were identified by video analysis and then used to calculate the index of coordination, which corresponded to the time between the propulsive phases of the two arms. With increases in speed, the elite swimmers increased the stroke rate, the relative duration of their arm pull, and their index of coordination, and decreased the distance per stroke (P < 0.05). Arm coordination was always in catch-up (index of coordination of -12.9%) because the alternating body-roll and the small shoulder flexibility did not allow the opposition or superposition coordination seen in the front crawl. This new method also quantified the relative duration of the hand's lag time at the thigh, which did not change ( approximately 2%) with increasing speed for the elite swimmers. The index of coordination enables coaches to assess mistakes in backstroke coordination, particularly in the hand's lag time at the thigh. 相似文献