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Protection des caroténoïdes dans des extraits de feuilles de luzerne par ajout d'éthoxyquine et entreposage frigorifique.

Protection of carotenoids in alfalfa leaf extracts by ethoxyquin addition and cold temperature storage.

Auteurs : LAYUG D. V., OHSHIMA M., OSTROWSKI-MEISSNER H. T., YOKOTA H. O.

Type d'article : Article

Résumé

Alfalfa (Medicago sativa) leaf extracts were prepared by macerating fresh herbage, coagulating the green juice by steam injection and separating the curd from the deproteinized juice with addition of ethoxyquin into the green juice prior to coagulation. At low temperatures (5 and -18 deg C), carotenoids were well preserved without ethoxyquin except for beta-carotene at 5 deg C. The recovery of beta-carotene at 5 deg C was only 40% but increased to 90% with the increase in ethoxyquin concentration. The decrease in ethoxyquin in leaf extract at temperatures above freezing indicated that ethoxyquin is itself subject to degradation. Only a slight difference in ethoxyquin degradation was observed between 5 and 28 deg C.

Détails

  • Titre original : Protection of carotenoids in alfalfa leaf extracts by ethoxyquin addition and cold temperature storage.
  • Identifiant de la fiche : 1999-0263
  • Langues : Anglais
  • Source : Grassland Sci. - vol. 42 - n. 3
  • Date d'édition : 1996

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