404 resultados para Thermotolerant yeasts


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Pós-graduação em Medicina Veterinária - FCAV

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The aim of this study was to evaluate the hygienic and sanitary conditions of pettreats from an export industry. The occurrence of Salmonella, enumerated sulfite-reducing Clostridium (SRC), coagulase-positive Staphylococcus (CPS) and total(TC) and thermotolerant coliforms (TTC) was studied. Of the 108 samples ana-lyzed, 22 were contaminated by some microorganism. TC were detected at twosamples (3.5 × 101and 4.5 × 101colony-forming units [cfu]/g), SRC in 19 samples(1.0 × 101to 1.3 × 105cfu/g) and Salmonella spp. at only one sample; CPS andTTC were not detected. These findings indicate the microbiological safety of mostitems, except for a mix of dried bovine offal, with 1.3 × 105cfu/g of SRC, and onemix of dehydrated bovine viscera contaminated with Salmonella. The current pro-duction processes and the food safety management system are adequate to guar-antee the production of microbiologically safe foods, but that some improvementscan still be made with regard to cleaning and disinfection and hygiene training.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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The aim of this work was to evaluate the application of different concentrations of ascorbic acid on Orange Flesh melon. Whole Melons were sanifi ed with 500 mg L-1 of sodium hypochlorite for 10 minutes and the cuts into cubes with 100 mg L-1 for 1 minute before being tested under different concentrations of ascorbic acid (0, 1, 2 and 3%) in immersion at room temperature for 10 minutes. After drainage, the cuts were packed in PET packages lined with polyethylene fi lm of 18 µm and stored at 5 ± 1°C and 85 ± 5% of RH for 8 days, being evaluated every 2 days. Physicochemical, microbiological and sensorial analyses were performed. The experimental design utilized for the experiment was the completely randomized in factorial scheme. Ten replicates were used for non-destructive analyses and 3 replicates were used for destructive ones. The application of ascorbic acid reduced the loss of mass; the fruits presented a low population of psychrotrophic bacterias, fi lamentous, fungi and yeasts, reduction of soluble solids, pH and fi rmness and, consequently, extended postharvest life of the fruits by 2 days. The appearance, fl avor and taste were also affected. The application of 1% of ascorbic acid was the best treatment for the fresh cuts “Orange Flesh” melons.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Microbiologia Agropecuária - FCAV

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Ciências Biológicas (Microbiologia Aplicada) - IBRC