Aqueous solution properties, biodegradability, and antimicrobial activity of some alkylpolyglycosides surfactants / M. M. A. El-Sukkary in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 5/2009 (09-10/2009)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 46, N° 5/2009 (09-10/2009) . - p. 311-316 Titre : Aqueous solution properties, biodegradability, and antimicrobial activity of some alkylpolyglycosides surfactants Type de document : texte imprimé Auteurs : M. M. A. El-Sukkary, Auteur ; W. I. M. El-Azab, Auteur ; S. M. Helmy, Auteur ; Aiad Ismail, Auteur ; N. A. Syed, Auteur Année de publication : 2009 Article en page(s) : p. 311-316 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alkyl polyglycosides Antimicrobiens Biodégradation Surfactants Thermodynamique Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : In the present investigation, a series of alkyl polyglycosides with alkyl chain length of C 8, 9, 10, 12 and 14 were synthesized using transacetalization method. Purity of the products was investigated using high performance liquid chromatography. Surface parameters particularly Effectiveness "pi"cmc, Efficiency PC20, maximum surface excess "gamma" max, minimum surface area Amin and HLB values are investigated, in addition to thermodynamic parameters ("Delta" Gads and "Delta Gmic). resistance to hydrolysis for the prepared compounds was investigated. The synthesized compounds were tested for their biodegradability in Nile river water according to die-away test method and their antimicrobial activity against different strains of bacteria, yeast and fungi was investigated. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6253 [article]

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Fragmentation mechanism of alkyl- monoglycosides by mass spectrometry / N. A. Sayed in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 4/2010 (07-08/2010)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 47, N° 4/2010 (07-08/2010) . - p. 217-221 Titre : Fragmentation mechanism of alkyl- monoglycosides by mass spectrometry Type de document : texte imprimé Auteurs : N. A. Sayed, Auteur ; M. M. A. El-Sukkary, Auteur ; W. I. M. El-Azab, Auteur Année de publication : 2010 Article en page(s) : p. 217-221 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aglucone Alkyl polyglycosides Spectrométrie de masse Surfactants Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Alkylmonoglycosides with different alkyl chain lengths (APG8, APG9, APG10 and APG14) were prepared by Fisher reaction of glucose with fatty alcohols. Excess alcohol was used to increase the possibility of producing alkyl monoglycosides products. Mass spectrometry with chemical ionization was used to confirm their structures as alkyl monoglycosides. Accordingly, the obtained signals at m/z = 293, 307, 321 and 377 corresponds to their protonated molecules. The base lines which are the most intensive signals in each spectrum at m/z = 145, 127, 141 and 197 represent the most abundant ions and define the pathway of their fragmentation mechanism. The mass 145 for APG8 is generated from the parent ion by elimination of the mass ROH followed by H2O. For this compound cleavage occurs at the C–O bond next to the glucose ring, while fragmentation of alkyl monoglycosides with carbon number 9, 10 and 14 occurs at the O–R bond releasing the alkyl cation R of the aglucone moiety (CnH2n+1) along with large fragment ions characteristic of the glucose moiety. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9799 [article]

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Synthesis and properties of some N-acylethylenediamine triacetic acid chelating surfactants / M. M. A. El-Sukkary in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 1/2010 (01-02/2011)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 1/2010 (01-02/2011) . - p. 82-86 Titre : Synthesis and properties of some N-acylethylenediamine triacetic acid chelating surfactants Type de document : texte imprimé Auteurs : M. M. A. El-Sukkary, Auteur ; E. A. Soliman, Auteur ; D. A. Ismail, Auteur ; S. M. El Rayes, Auteur ; M. A. Saad, Auteur Année de publication : 2011 Article en page(s) : p. 82-86 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : 'Acide  triacétique  N-acyléthylènediamine'  'Surfactant  multifonctionnel'  'Surfactants  chélatés'  Chélatant Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A new kind of surfactants with chelating properties named N-acylethylenediamine triacetate (N-acyl ED3A) of different hydrocarbon chain lengths were synthesized from anhydrous ethylene diamine, fatty acid chlorides (Capryloyl, lauroyl, myristoyl, palmitoyl, stearoyl or oleoyl chloride) and chloroacetic acid. The chemical structures of the prepared compounds were confirmed using different spectroscopic techniques, primarily Fourier transform infrared spectroscopy and nuclear magnetic resonance. The surface properties including surface and interfacial tension, foaming height, emulsification power, calcium ion stability, stability to hydrolysis and critical micelle concentration (CMC) were determined. The trisodium N-acylethylenediamine triacetates have been found to combine the properties of strong surfactancy, extreme mildness with a high tolerance to water hardness, and ability to chelate metal ions, which indicates a promising application prospect in many fields. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10678 [article]

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