Navegando por Autor "Silva, Rodes Angelo Batista da"

Agora exibindo 1 - 3 de 3
  • Nenhuma Miniatura disponível
    Item
    Biospeckle Laser Technique for mechanical damage assessment in Tommy atkins mango fruits
    (2021) Santana, Taize Calvacante; Silva, Rodes Angelo Batista da; Pandorfi, Héliton; Silva, Marcos Vinícius da; Rodrigues, Silvestre; Guiselini, Cristiane; Cavalcanti, Sávio Duarte Lopes; Gomes, Nicoly Farias
    Abstract The objective of this study was to evaluate the response of biological activity measured by the Biospeckle Laser technique applied to mangoes (Mangifera indica L.) subjected to mechanical damage at different stages of maturation. The tests were carried out twice a week for twenty-one days, and 40 mangoes of the variety Tommy Atkins were used. The procedure was divided into two stages: the first simulated the impact on fruits, and in the second stage, the laser light was applied to the impacted area. After laser application, the images of all fruits were submitted to graphic processing, in order to obtain maps of biological activity of the fruits. The Biospeckle laser technique associated with image analysis allowed the identification of distinct biological activity levels in the mangoes, certifying its potential application as a non-destructive test tool, in the monitoring of biological activity in fruit samples. Resumo Objetivou-se avaliar a resposta da atividade biológica medida pela técnica Biospeckle Laser aplicada a mangas (Mangifera indica L.) submetidas a danos mecânicos, em diferentes estágios de maturação. Os testes foram realizados duas vezes por semana, durante 21 dias, sendo utilizados 40 frutos de manga da variedade Tommy. O procedimento foi dividido em duas etapas: na primeira etapa, simulou-se o impacto nos frutos; na segunda etapa, foi aplicada a luz laser sobre a área que sofreu impacto, seguido do registro das imagens de todos os frutos. Esses registros foram submetidos a um processamento gráfico, com a finalidade de se obterem mapas de atividade biológica dos frutos. A técnica Biospeckle laser associada à análise de imagem permitiu identificar níveis de atividades biológicas distintas nas mangas, certificando o seu potencial de aplicação como ferramenta de teste não destrutivo, no monitoramento da atividade biológica em amostras de frutos.
  • Nenhuma Miniatura disponível
    Item
    Influence of meteorological elements on behavioral responses of gir cows and effects on milk quality
    (2021) Silva, Marcos Vinícius da; Almeida, Gledson Luiz Pontes de; Pandorfi, Héliton; Moraes, Alex Souza; Macêdo, Gleidiana Amélia Pontes de Almeida; Batista, Pedro Henrique Dias; Silva, Rodes Angelo Batista da; Guiselini, Cristiane
    ABSTRACT. This study aimed to analyze the principal components of the meteorological variables, physiological and behavioral response of cows subjected to different cooling times and their influence on milk quality, in the dry and rainfall periods, and to establish multiple regression models for milk quality. The data used in the study came from an experiment conducted in the Agreste Region of Pernambuco. The pre-milking cooling time was 10, 20, 30 min. and the control (without cooling). Sixteen multiparous lactating Gir cows were selected. Data were analyzed by principal component analysis and a multiple regression analysis was applied to determine milk quality. There was a strong relationship between somatic cell count (SCC) and activity of the animal in the shade for dry, and lying for rainfall, with increased SCC in cow milk. It was possible to establish two multiple regression models to determine milk quality in dry and rainfall periods. According to the principal component analysis, the cooling time to meet the thermal requirement of the animals was 20 min., regardless of the season and milking shift.
  • Nenhuma Miniatura disponível
    Item
    Influence of meteorological elements on behavioral responses of gir cows and effects on milk quality
    (2021) Silva, Marcos Vinícius da; Almeida, Gledson Luiz Pontes de; Pandorfi, Héliton; Moraes, Alex Souza; Macêdo, Gleidiana Amélia Pontes de Almeida; Batista, Pedro Henrique Dias; Silva, Rodes Angelo Batista da; Guiselini, Cristiane
    ABSTRACT. This study aimed to analyze the principal components of the meteorological variables, physiological and behavioral response of cows subjected to different cooling times and their influence on milk quality, in the dry and rainfall periods, and to establish multiple regression models for milk quality. The data used in the study came from an experiment conducted in the Agreste Region of Pernambuco. The pre-milking cooling time was 10, 20, 30 min. and the control (without cooling). Sixteen multiparous lactating Gir cows were selected. Data were analyzed by principal component analysis and a multiple regression analysis was applied to determine milk quality. There was a strong relationship between somatic cell count (SCC) and activity of the animal in the shade for dry, and lying for rainfall, with increased SCC in cow milk. It was possible to establish two multiple regression models to determine milk quality in dry and rainfall periods. According to the principal component analysis, the cooling time to meet the thermal requirement of the animals was 20 min., regardless of the season and milking shift.