Quality of eggs coated with oil-chitosan emulsion: combined effects of emulsifier types, initial albumen quality, and storage.

摘要

Effects of mineral oil:chitosan (MO:CH at 25:75) emulsions prepared with four different emulsifiers (2 water- and 2 oil-miscible) as coatings on the internal quality (weight loss, Haugh unit, yolk index, and albumen pH) of coated eggs were evaluated during 5 weeks at 25 +or- 2 degrees C and 20 weeks at 4 +or- 2 degrees C. Eggs with two initial albumen qualities [Haugh unit (HU): H = 87.8 and L = 70.9] were used. At 25 +or- 2 degrees C, Haugh unit, yolk index, and albumen pH of all coated eggs decreased with increased storage time. Coated H- and L-eggs maintained an A-grade up to 4 weeks and 1 week, respectively. Weight loss of all coated eggs remained below 1.35% after 5 weeks of storage at 25 +or- 2 degrees C. All coated eggs maintained an A-grade with less than 2.5% weight loss during 20 weeks of storage at 4 +or- 2 degrees C. Emulsifier types marginally affected the internal quality of coated eggs regardless of storage temperatures. All rights reserved, Elsevier.