61 research outputs found

    Release of coumarin encapsulated in chitosan-gelatin irradiated films

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    Chitosan and fish gelatin were used to formulate active biobased films containing an antioxidant (coumarin). After drying, the films were irradiated at 40 and 60 kGy using an electron beam accelerator. The effect of irradiation on the film properties as well as the coumarin release mechanism were investigated and compared with the control. Electron Spin Resonance (ESR) revealed free radical formation during irradiation in films containing coumarin. Antioxidant addition and/or irradiation treatment at a dose of 60 kGy resulted in a shift of amide A and amide B peaks. Furthermore a shift of amide II band was only observed for the control film at the same dose. Irradiation allowed improving the thermal stability of the control films. Both irradiation process and addition of coumarin increased the surface wettability (increase of the polar component of the surface tension). From the water barrier analysis, neither irradiation nor coumarin addition influenced the permeability at the lower RH gradient used (0e30% RH). Using the higher RH gradient (30e84%) induced a rise of the WVP of all films (containing or not coumarin) after irradiation treatment. At 60 kGy, the tensile strength of only the control films increased significantly. Considering coumarin release from the film in aqueous medium, the apparent diffusion coefficient of coumarin is two times reduced after irradiation. Irradiation also allowed to better protect the incorporated antioxidant. Indeed, the amount of coumarin in the non-irradiated film was significantly lowered compared to the initial quantity, which is probably due to chemical reactivity

    PĂ©diculose du cuir chevelu (Ă©tat des connaissances en 2009)

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    DIJON-BU MĂ©decine Pharmacie (212312103) / SudocSudocFranceF

    Les médicaments photosensibilisants à l officine (prévention des risques et information du patient)

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    La photosensibilisation recouvre deux mĂ©canismes diffĂ©rents, la phototoxicitĂ©, rĂ©action photochimique, et la photo-allergie, rĂ©action immunitaire. Un certain nombre de mĂ©dicaments, en constante Ă©volution, est susceptible de provoquer une rĂ©action de photosensibilisation, par l un ou l autre mĂ©canisme, voire en associant les deux. MalgrĂ© certains signes cliniques caractĂ©ristiques, le diagnostic peut se rĂ©vĂ©ler complexe. Les rĂ©actions de photosensibilisation peuvent ĂȘtre responsables de troubles cutanĂ©s importants, avec parfois des consĂ©quences Ă  long terme pour les patients. En outre, une majoritĂ© de Pharmaciens d officine se considĂšre comme insuffisamment informĂ©e dans ce domaine. Les diffĂ©rentes pistes prĂ©sentĂ©es dans ce travail ont pour but d accompagner le Pharmacien lors de la dĂ©livrance des principaux mĂ©dicaments photosensibilisants, afin de signaler et expliquer au patient cet effet indĂ©sirable potentiel.DIJON-BU MĂ©decine Pharmacie (212312103) / SudocSudocFranceF

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    Résumé françaisDIJON-BU Médecine Pharmacie (212312103) / SudocSudocFranceF

    Le point en 2006 sur les produits amincissants

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    DIJON-BU MĂ©decine Pharmacie (212312103) / SudocSudocFranceF

    Suivi des patients cancéreux dans l'Yonne (guide pour les pharmaciens d'officine)

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    DIJON-BU MĂ©decine Pharmacie (212312103) / SudocSudocFranceF

    L'assurance qualité à l'officine (le nouveau défi du pharmacien)

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    DIJON-BU MĂ©decine Pharmacie (212312103) / SudocSudocFranceF

    Gestion des déviations (application au pelliculage des comprimés)

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    DIJON-BU MĂ©decine Pharmacie (212312103) / SudocSudocFranceF

    Perspectives vaccinales (les principaux vaccins en essais cliniques en 2009)

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    DIJON-BU MĂ©decine Pharmacie (212312103) / SudocSudocFranceF
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