The effect of propolis egg shell coatings on interior egg quality

Copur G., Camci O., Sahinler N., GÜL A.

Archiv fur Geflugelkunde, vol.72, no.1, pp.35-40, 2008 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 72 Issue: 1
  • Publication Date: 2008
  • Journal Name: Archiv fur Geflugelkunde
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.35-40
  • Keywords: Albumen index, Albumen pH, Eggs, Haugh unit, Layer, Propolis
  • Uşak University Affiliated: No

Abstract

Effects of various concentrations of propolis for egg coating (5%, 8% and 10% of propolis in ethanol) on the interior quality of fresh eggs were evaluated during 4 weeks of storage. During storage, albumen height decreased whereas albumen pH increased. The albumen pH of the uncoated eggs (control; Group I), and the eggs coated with alcohol (Group II) and 5% propolis (Group III) was significantly higher (P < 0.05) than the albumen pH of eggs coated with 8% (Group IV) and 10% propolis (Group V). On the other hand, at 4 weeks storage eggs of Groups IV and V had a higher albumen index than the rest of the groups. The HU value of eggs of Groups IV and V were significantly higher than for eggs of Groups I, II and III. Coating with 10% propolis (Group V) resulted in the maintenance of grade 'A' for 2 weeks longer than for the other groups. Propolis did not affect yolk-index (YI) value (p > 0.05). In conclusion, coating of eggs with 10% propolis extract improved interior egg quality during storage. © Verlag Eugen Ulmer.