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Filename: drivers/Session_files_driver.php
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Filename: drivers/Session_files_driver.php
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Ici, nous avons synthétisé des points quantiques de carbone fluorescent via un traitement hydrothermal en une étape facile des graines de moutarde (M-CQD). Il présentait une excellente propriété optique avec un rendement quantique fluorescent de 4,6%. Les M-CQD préparées présentaient une activité mimétique de type peroxydase et catalysaient l'oxydation du substrat chromogène 3,3 ', 5,5'-tétraméthylbenzidine (TMB) en présence de H2O2 pour produire un mélange réactionnel de couleur bleue avec le pic prédominant à 652nm. De plus, la performance catalytique de type peroxydase des M-CQD suivait le comportement cinétique à l'état d'équilibre et présentait une activité catalytique similaire à celle de l'enzyme naturelle Horseradish peroxydase (HRP). En plus de cela, le double tracé réciproque a montré une ligne parallèle suggérant l'apparition d'un mécanisme de type Ping-Pong. L'oxydation de TMB dépendante de H2O2 a été utile pour la détection colorimétrique de H2O2 dans la plage linéaire de 0,02 à 0,20 mM avec une limite de détection (LD) de 0,015 mM. De manière intéressante, le TMB oxydé (ox-TMB) a été réduit davantage en TMB natif par l'agent réducteur, l'acide ascorbique. Par conséquent, les M-CQD ont montré leur potentiel pour la détection sélective et sensible de l’acide ascorbique dans la plage linéaire de 10 à 70 µm ayant un coefficient de corrélation de 0,998 avec une LOD de 3,26 µm. La faisabilité pratique de la méthode de détection proposée des AA a également été étudiée pour les fruits frais communs.
Source: https://www.ncbi.nlm.nih.gov/pubmed/30712585