Tannins of the testa of anacardium occidentale (cashew) and husk of arachis hypogaea (groundnut) : characterization and potential applications / P. O. Ukoha in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 7 (07/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 7 (07/2010) . - p. 242-249 Titre : Tannins of the testa of anacardium occidentale (cashew) and husk of arachis hypogaea (groundnut) : characterization and potential applications Type de document : texte imprimé Auteurs : P. O. Ukoha, Auteur ; P. M. Ejikeme, Auteur ; C. C. Maju, Auteur Année de publication : 2010 Article en page(s) : p. 242-249 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Tannins  végétaux'  Anarcadier  'Anacardium  occidentale'  Testa  'Hypogaea  d'arachis'  'Cosse  d'arachide'  Caractérisation  'Spectroscopie  UV'  'Chromatographie  sur  papier'  Cyanidine  Quercétine  Delphinidine  Ellagitannins Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Aqueous and acid-hydrolysed ethyl acetate extracts of the kernel husks (testa) of cashew (Anacardium occidentale) and groundnut (Arachis hypogaea) were analyzed for tannin content using qualitative and quantitative tests, paper chromatographic separation and UV spectroscopy. Qualitative tests indicate that the tannins of cashew nut kernel husks are mainly condensed type while those of groundnut husks are mixed tannins. UV spectra of the tannins implied that ellagitannins was present in the groundnut husks whereas the tannins of cashew nut husks contain cyanidin, quercetin, and delphinidin, among others. Chromatographic separation of the hydrolysed tannins also detected other components. Quantitative determination showed about 19.9 - 22.1 percent tannins in the husks of cashew nut and about 5.7 - 7.5 percent tannins in the husks of groundnut. Potential applications of the extracts as tanning and re-tanning agents in the production of shoe upper leathers have also been investigated. En ligne : https://drive.google.com/file/d/1c6FTN79psbY39nIpXA6ETrPFyOGTqB4I/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9723 [article]

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