English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/18843
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Changes in eggshell mechanical properties, crystallographic texture and in matrix proteins induced by moult in hens

AuthorsAhmed, A. M. H.; Rodríguez-Navarro, Alejandro B.; Vidal, M. L.; Gautron, J.; García Ruiz, Juan Manuel ; Nys, Y.
Issue DateJun-2005
PublisherTaylor & Francis
CitationBritish Poultry Science 46(3): 268-279 (2005)
AbstractThe effect of moult on eggshell mechanical properties, on composition and concentrations of organic matrix components and on eggshell microstructure was investigated. The observed changes were studied to understand the role of organic matrix and eggshell microstructure in eggshell strength. Moult was induced by zinc oxide (20 g zinc/kg diet) in 53 ISA Brown laying hens at 78 weeks of age. No difference was observed for egg or eggshell weights after moult. In contrast, moult improved the shell breaking strength (28.09 vs 33.71 N). After moult, there was a decrease in the average size of calcite crystals composing the eggshell and in their heterogeneity, whereas crystal orientation remained basically the same. After moulting, the total protein concentration in eggshell increased slightly. The comparisons of SDS-PAGE profiles of the organic matrix constituents extracted before and after moulting showed changes in staining intensity of certain bands. After moult, bands associated with main proteins specific to eggshell formation (OC-116 and OC-17) showed higher staining intensity, while the intensity of the egg white proteins (ovotransferrin, ovalbumin and lysozyme) decreased. ELISA confirmed the decrease in ovotransferrin after moult. Its concentration was inversely correlated with breaking strength before moult. These observations suggest that changes in eggshell crystal size could be due to changes in organic matrix composition. These changes may provide a mechanism for the improvement in shell solidity after moulting.
Publisher version (URL)http://dx.doi.org/10.1080/00071660500065425
URIhttp://hdl.handle.net/10261/18843
DOI10.1080/00071660500065425
ISSN0007-1668
Appears in Collections:(IACT) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.