Alterações da casca e conteúdo interno de ovos de consumo em função da idade de galinhas leves

• Ano de defesa: 2008
• Autor(a) principal: Ferreira, Keila Faria
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Ciências Veterinárias; Ciências Agrárias; UFU
• Palavras-chave em Português: Análises físicas; Análises bromatológicas; Ovos - Qualidade; Ovos; Egg quality; Physical analysis; Chemical analysis; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/12968

This study aimed to evaluate the influence of age of Dekalb White hens in the composition of the shell and internal contents of eggs for human consumption. We studied two samples of 40 eggs each in 10 different ages (25, 30, 35, 40, 45, 50, 55, 60, 65 and 70 weeks) in the same batch of chickens. The sample A was formed with average weights of eggs and growing certain second line of table and sample B was formed with average weights of eggs set. It was analyzed each component of egg characteristic physical and chemical. From this it was possible to observe that the specific gravity decreased with increasing age of the bird, showing relation of this variable with age of the chicken and not with the size of the egg. The percentage and shell thickness were inversely proportional to the age of the chicken and there was no direct correlation with the weight of the egg. The mineral deposition in the bark was concluded that allowing the deposition of the mineral shell is proportional to the size of the egg. The percentage of calcium and phosphorus decreased in direct ratio of the increase of age in the two samples. The albumen weight increased in A and decreased in B, showing respect to the size of the egg. The percentage of moisture of albumen increased with increasing age of the chicken and showed no relation with the weight of the egg. The percentage of protein of the albumen was constant throughout the ages studied and between samples, showing relationship with the weight of the egg. The pH of the albumen increased in direct ratio to age of hen. Weight and percentage of egg yolk increased with increasing age of hen. The percentage of moisture from the yolk decreased as the age of the hen increased. At the end of this study, we observed that the age of the chicken light, therefore, influenced the specific gravity, percentage, thickness, pore number, percentage of calcium and phosphorus in the shell; moisture and albumen pH, weight, percentage, moisture , protein, fat and mineral content of the yolk.