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Filename: drivers/Session_files_driver.php
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File: /home/orthodiedw/nutridatabase/application/controllers/Articles.php
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Filename: drivers/Session_files_driver.php
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Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
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File: /home/orthodiedw/nutridatabase/application/controllers/Articles.php
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Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
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File: /home/orthodiedw/nutridatabase/application/controllers/Articles.php
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Filename: Session/Session.php
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File: /home/orthodiedw/nutridatabase/application/controllers/Articles.php
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File: /home/orthodiedw/nutridatabase/index.php
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Message: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent
Filename: Session/Session.php
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Filename: Session/Session.php
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Function: __construct
File: /home/orthodiedw/nutridatabase/index.php
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Filename: Session/Session.php
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Line: 7
Function: __construct
File: /home/orthodiedw/nutridatabase/index.php
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Matériau hybride composé de guanine Les nanofeuilles ADN simple brin (ADNsb riche en G) et oxyhydroxyde de cobalt (CoOOH) sont utilisées comme nanosonde pour la détection par activation fluorimétrique de l'acide ascorbique (AA). Les nanofeuilles CoOOH fonctionnent comme un composant de reconnaissance pour AA. Le ssADN riche en G est utilisé pour produire un G-quadruplex, et le complexe G-quadruplex / thioflavine T (ThT) agit en tant que rapporteur fluorescent. En l'absence de AA, la p-phénylènediamine (PPD) est oxydée pour former un oxPPD de couleur rouge foncé. Il provoque l'extinction de la fluorescence du complexe G-quadruplex / ThT. Cependant, en présence de AA, les nanofeuilles CoOOH de la nanosonde sont préférentiellement réduites par AA. Par conséquent, la PPD n'est pas oxydée et la fluorescence n'est pas désactivée. Une méthode d'activation fluorométrique a été développée sur la base de ces résultats. Il a une limite de détection de 94 nM et fonctionne dans la plage de concentrations allant de 1 à 10 et de 20 à 80 μM. Cette méthode a été appliquée à la détermination de l'AA dans des échantillons de jus de fruits (enrichis). Résumé graphique La présentation schématique d'un dosage fluorescent de l'acide ascorbique (AA) est établie à l'aide d'une nanosonde composée de nanosheets d'ADN simple brin riche en guanine (ADN-s riche en G) et d'oxyhydroxyde de cobalt (CoOOH). Il est basé sur la réduction compétitive de CoOOH par la p-phénylènediamine (PPD) et l'AA. La thioflavine T (ThT) induit la formation d'un complexe G-quadruplex / ThT fluorescent. La forme oxydée de PPD (oxPPD) peut éteindre la fluorescence via le transfert d'énergie de résonance de fluorescence (FRET), mais l'AA supprime la désactivation.
Source: https://www.ncbi.nlm.nih.gov/pubmed/30712118