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

Author(s) : LAYUG D. V., OHSHIMA M., OSTROWSKI-MEISSNER H. T., YOKOTA H. O.

Type of article: Article

Summary

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.

Details

  • Original title: Protection of carotenoids in alfalfa leaf extracts by ethoxyquin addition and cold temperature storage.
  • Record ID : 1999-0263
  • Languages: English
  • Source: Grassland Sci. - vol. 42 - n. 3
  • Publication date: 1996

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