Antimicrobial sulphonamide azo dyes / Hatem E. Gaffer in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 6 (12/2019) . - p. 484-500 Titre : Antimicrobial sulphonamide azo dyes Type de document : texte imprimé Auteurs : Hatem E. Gaffer, Auteur Année de publication : 2019 Article en page(s) : p. 484-500 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Colorants -- Synthèse Colorants azoïques Sulfonamides Tautomérie Index. décimale : 667.2 Colorants et pigments Résumé : Sulphonamide motifs are widely found in many drug candidates with relevant biological activity. Moreover, sulphonamide azo dyes are interesting candidates for synthetic chemists because such dyes provide access to a broad range of functional group transformations. Therefore, many synthetic procedures for the preparation of sulphonamide azo dyes have been developed in recent decades, and the search for rapid and efficient protocols is ongoing. The current article aims to review recent trends in the synthesis of sulphonamide azo dyes and their applications as high-performance colorants with antimicrobial activity. For convenience, the diverse uses of sulphonamide azo dyes are discussed from the perspective of the application type rather than the structural class. Note de contenu : - Chemistry of sulphonamides : Tautomerisation - Synthesis of azo dyes containing sulphonamide moieties - - Metabolism - Sulphonamide azo dye complexe - Overview of testing protocols for antimicrobial activity DOI : 10.1111/cote.12437 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12437 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33380 [article]

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Preparation and characterization of polydimethylsiloxane containing cyano/phenyl groups for potential use in sorptive extraction / Miguel Angel Ávila-Martínez in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. 1087-1094 Titre : Preparation and characterization of polydimethylsiloxane containing cyano/phenyl groups for potential use in sorptive extraction Type de document : texte imprimé Auteurs : Miguel Angel Ávila-Martínez, Auteur ; Yamile Pérez-Padilla, Auteur ; Salvador Medina-Peralta, Auteur ; Alejandro Ávila-Ortega, Auteur ; David Muñoz-Rodríguez, Auteur Année de publication : 2021 Article en page(s) : p. 1087-1094 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption Adsorption Caractérisation Composés organiques Extraction (chimie) Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Polymères à silane modifié Polymères organiques-inorganiques Revêtements organiques Sol-gel, Procédé Sulfonamides Index. décimale : 667.9 Revêtements et enduits Résumé : A coating of poly(dimethylsiloxane) (PDMS) on a stir bar is typically used for sorptive extraction and preconcentration of nonpolar organic analytes from aqueous matrices. Here, we used sol–gel to synthesize three new coatings based on hydroxy-terminated PDMS crosslinked with 3-cyanopropyltriethoxysilane (CN) and phenyltriethoxysilane (PH) with three molar ratios of CN:PH (2:1, 1:1, and 1:2). The water contact angle of the coatings was below 90°. Cyanopropyl and phenyl groups were identified by infrared spectroscopy. The coatings were thermally stable up to 200°C. Also, they were stable to organic solvents and aqueous solutions at different pH. Glass stir bars were covered with the coatings to explore its potential application in stir-bar sorptive extraction. The test included polar antibiotics (sulfathiazole, sulfamethoxazole, trimethoprim, and chloramphenicol) dissolved in spiked water (pH 4.5) and organic solvent. Different experimental conditions were used to explore the capacity of the coatings to extract and preconcentrate the antibiotics. Unsatisfactory results of enrichment effect were obtained in aqueous solutions of antibiotics. In organic medium, the antibiotics were extracted and preconcentrated with the three coatings. Note de contenu : - MATERIALS AND METHODS : Reagents and dissolutions - Preparation of stir bars with hybrid coating - Physicochemical characterization of the coatings - SBSE tests with coated stir bars - Experimental design and statistical analysis - Chromatographic analysis - RESULTS AND DISCUSSION : Sol–gel synthesis of coatings - Characterization of hybrid coatings - Stability of coatings against solvents - Stability against pH conditions - Determination of water contact angle - Thermogravimetric analysis - SBSE tests with coated stir bars - Table 1 : Reagent composition for the sol–gel preparation of the three in-house coatings - Table 2 : Levels and factors used in 24 experimental design with five central points to evaluate the extraction of antibiotics by SBSE - Table 3 Preconcentration factors for antibiotics (0 < log10KOW < 1.2) in SBSE extracts obtained in spiked isooctane. Extraction : 10 mL isooctane (spiked with 1 mg L−1), 250 rpm and 120 min. Desorption : vortex assisted, 40 min, 500 µL of 40% of MeOH–60% aqueous formic buffer solution (0.10% v/v, pH 4.5) DOI : https://doi.org/10.1007/s11998-021-00462-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00462-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36215 [article]

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Synthesis of some novel sulfonamide derivatives and investigating their biocidal activity in cooling towers / A. M. Badawi in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 2/2011 (03-04/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 2/2011 (03-04/2011) . - p. 154-159 Titre : Synthesis of some novel sulfonamide derivatives and investigating their biocidal activity in cooling towers Type de document : texte imprimé Auteurs : A. M. Badawi, Auteur ; D. E. Mohamed, Auteur ; A. A. Hafiz, Auteur ; S. M. Ahmed, Auteur ; Y. M. Gohar, Auteur ; E. A. Soliman, Auteur ; M. S. A. Sanan, Auteur Année de publication : 2011 Article en page(s) : p. 154-159 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Sulfonamides Tour de refroidissement Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A novel series of dibenzothiophenedioxide sulphonamide derivatives were synthesized and tested as antimicrobial agents. The chemical structures of the prepared compounds were confirmed by micro elemental analysis, fourier transform infrared (FT-IR) and proton nuclear magnetic resonance spectroscopy (H-NMR). The surface parameters of two of the prepared compounds were determined at 35 °C including, surface tension, effectiveness, maximum surface excess and minimum surface area. Also the standard free energy of micellization and adsorption were recorded. The results showed that the prepared sulphonamides have good surface properties and effective antimicrobial activity against thirty three test organisms isolated from cooling towers. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11133 [article]

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