title: Effect of dietary pomegranate seed oil on laying hen performance and physicochemical properties of eggs.
abstract: The objective of the study was to determine the effects of pomegranate seed oil, used as a source of punicic acid (CLnA) in the diets of laying hens, on the physicochemical properties of eggs. Forty Isa Brown laying hens (26weeks old) were equally subjected to 4 dietary treatments (n=10) and fed a commercial layer diet supplying 2.5% sunflower oil (control) or three levels (0.5, 1.0 and 1.5%) of punicic acid in the diets. After 12weeks of feeding the hens, eggs collection began. Sixty eggs - randomly selected from each group - were analysed for physicochemical properties. Eggs naturally enriched with CLnA preserve their composition and conventional properties in most of the analysed parameters (including chemical composition, physical as well as organoleptic properties). Dietary CLnA had positive impact on the colour of the eggs' yolk, whereas the hardness of hard-boiled egg yolks was not affected. Additionally, increasing dietary CLnA led to an increase not only the CLnA concentrations, but also CLA in egg-yolk lipids.
authors.affiliation: Department of Human Nutrition, Faculty of Food Technology, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland. Electronic address: rkostogrys@ar.krakow.pl.
authors.forename: Renata B
authors.initials: RB
authors.lastname: Kostogrys
authors.affiliation: Department of Food Technology and Consumption, Faculty of Food Technology, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Filipiak-Florkiewicz
authors.affiliation: Department of Food Technology and Consumption, Faculty of Food Technology, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Dereń
authors.affiliation: Department of Human Nutrition, Faculty of Food Technology, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Drahun
authors.affiliation: Department of Human Nutrition, Faculty of Food Technology, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Izabela
authors.initials: I
authors.lastname: Czyżyńska-Cichoń
authors.affiliation: Department of Food Technology and Consumption, Faculty of Food Technology, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Cieślik
authors.affiliation: Department of Animal Nutrition and Feed Science, National Research Institute of Animal Production, 32-083 Balice, Poland.
authors.forename: Beata
authors.initials: B
authors.lastname: Szymczyk
authors.affiliation: Department of Human Nutrition, Faculty of Food Technology, University of Agriculture in Kraków, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Franczyk-Żarów
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D055598:Chemical Phenomena / Q000187:drug effects*; D002645:Chickens; D004032:Diet / Q000379:methods; D004530:Egg Yolk / Q000737:chemistry; D004531:Eggs / Q000032:analysis*; D005227:Fatty Acids / Q000032:analysis; D005260:Female; D008055:Lipids / Q000032:analysis; D029561:Lythraceae; D010938:Plant Oils / Q000008:administration & dosage*; D012639:Seeds; D000074242:Sunflower Oil
chemical_list: D005227:Fatty Acids; D008055:Lipids; D010938:Plant Oils; D000074242:Sunflower Oil
keywords: CLnA-enriched eggs; Physicochemical characterisation; Pomegranate seed oil; Punicic acid (CLnA)