The aim of this study was to assess the incidence and to estimate the growth kinetic parameters (maximum growth rate, μ; lag time, λ; and maximum population, κ) of Salmonella on the peel and pulp of avocado (Perseaamericana var.... more
The aim of this study was to assess the incidence and to estimate the growth kinetic parameters (maximum growth rate, μ; lag time, λ; and maximum population, κ) of Salmonella on the peel and pulp of avocado (Perseaamericana var. americana) and custard apple (Annona squamosa L.) as affected by temperature (10-30°C). The incidence of Salmonella was assessed on the peel and pulp of the fruits (n=200 of each fruit), separately, totalizing 800 analyses. Only three samples of custard apple pulp were positive for Salmonella enterica and the three isolates recovered belonged to serotype S. Typhimurium. Salmonella was not recovered from avocado and custard apple peels and from avocado pulp. Generally, the substrate (pulp or peel) of growth did not affect μ values of S. enterica (p>0.05). Very similar μ values were found for S. enterica inoculated in custard apple and avocado. S. enterica presented the highest λ in the peel of the fruits. The growth of S. enterica resulted in larger λ in c...
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Como consequência do adoecimento de muitos policiais devido a seu ofício, não apenas eles sofrem, mas também a sociedade. Por isso, torna-se essencial investigar os fatores que contribuem para reduzir o esgotamento do policial militar e,... more
Como consequência do adoecimento de muitos policiais devido a seu ofício, não apenas eles sofrem, mas também a sociedade. Por isso, torna-se essencial investigar os fatores que contribuem para reduzir o esgotamento do policial militar e, por conseguinte, a incidência de doenças diversas sobre essa categoria profissional. Nesse contexto, definiu-se como objetivo de pesquisa analisar a relação entre o prestígio organizacional percebido, a identificação organizacional e a exaustão emocional do policial militar de Minas Gerais. O método de pesquisa empregado foi a survey e, para analisar os dados coletados, aplicou-se a técnica de Modelagem de Equações Estruturais. Com base nos resultados, concluiu-se que o prestígio organizacional percebido influencia positivamente a identificação organizacional e negativamente a exaustão emocional do agente vinculado à Polícia Militar de Minas Gerais. Ademais, constatou-se que a identificação organizacional exerce uma influência negativa sobre a exaus...
To investigate the relationships between quality of life (QOL) and clinical and electroencephalogram (EEG) aspects in patients with Alzheimer's disease (AD). Twenty-eight patients with mild or moderate AD, 31... more
To investigate the relationships between quality of life (QOL) and clinical and electroencephalogram (EEG) aspects in patients with Alzheimer's disease (AD). Twenty-eight patients with mild or moderate AD, 31 with Parkinson's disease (PD), and 27 normal controls (NC) were submitted to: CERAD neuropsychological battery, Hamilton Depression and Anxiety Rating Scales, Functional Activities Questionnaire, QOL scale for patients with AD, and quantitative EEG measures. AD and PD patients had similar QOL (31.0 ± 5.8; 31.7 ± 4.8, respectively), worse than that of NC (37.5 ± 6.3). AD patients had lower global interhemispheric theta coherence (0.49 ± 0.04; 0.52 ± 0.05; 0.52 ± 0.05; respectively) than PD and NC. Multiple linear regression for QOL of AD patients revealed that global interhemispheric theta coherence, and Hamilton depression scores were significant factors (coefficients; 58.2 and -0.27, respectively; R2, 0.377). Interhemispheric coherence correlates with QOL regardless of cognitive and functional variables and seems to be a neurophysiological indicator of QOL in AD patients.
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Landsat 5 TM images (TM1 to TM5 and TM7 spectral bands) from Altamira PA (Brazil) for 02.07.1991, were transformed into surface reflectance images by the 6S atmospheric correction code in order to characterize spectrally secondary... more
Landsat 5 TM images (TM1 to TM5 and TM7 spectral bands) from Altamira PA (Brazil) for 02.07.1991, were transformed into surface reflectance images by the 6S atmospheric correction code in order to characterize spectrally secondary succession stages of vegetation. Biophysical data (ADBH, ABA, TBA, THS and THSTD) collected in the field from 16 sampled vegetation plots were utilized in a
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This study evaluated the effects of irradiation on the reduction of Shiga toxin-producing Escherichia coli (STEC), Salmonella strains, and Listeria monocytogenes, as well as on the sensory characteristics of minimally processed spinach.... more
This study evaluated the effects of irradiation on the reduction of Shiga toxin-producing Escherichia coli (STEC), Salmonella strains, and Listeria monocytogenes, as well as on the sensory characteristics of minimally processed spinach. Spinach samples were inoculated with a cocktail of three strains each of STEC, Salmonella strains, and L. monocytogenes, separately, and were exposed to gamma radiation doses of 0, 0.2, 0.4, 0.6, 0.8, and 1.0 kGy. Samples that were exposed to 0.0, 1.0, and 1.5 kGy and kept under refrigeration (4°C) for 12 days were submitted to sensory analysis. D10 -values ranged from 0.19 to 0.20 kGy for Salmonella and from 0.20 to 0.21 for L. monocytogenes; for STEC, the value was 0.17 kGy. Spinach showed good acceptability, even after exposure to 1.5 kGy. Because gamma radiation reduced the selected pathogens without causing significant changes in the quality of spinach leaves, it may be a useful method to improve safety in the fresh produce industry.
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... Aceito para publicação em 20.6.2002. 2 Instituto Nacional de Pesquisas Espaciais, Divisão de Sensoriamento Remoto, Avenida dos Astronautas, 1758, 12227-010 São José dos Campos-SP. ... Flávio Jorge Ponzoni2 e Ana Carolina Pinto... more
... Aceito para publicação em 20.6.2002. 2 Instituto Nacional de Pesquisas Espaciais, Divisão de Sensoriamento Remoto, Avenida dos Astronautas, 1758, 12227-010 São José dos Campos-SP. ... Flávio Jorge Ponzoni2 e Ana Carolina Pinto Rezende2 ...
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... Flávio Jorge Ponzoni2, Ana Carolina Pinto Rezende2 ... através do uso de pontos de controle identificados durante trabalho de campo, cujas coordenadas geográficas foram determinadas mediante o uso de um GPS diferencial, proporcionando... more
... Flávio Jorge Ponzoni2, Ana Carolina Pinto Rezende2 ... através do uso de pontos de controle identificados durante trabalho de campo, cujas coordenadas geográficas foram determinadas mediante o uso de um GPS diferencial, proporcionando um erro estimado sempre menor ...
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This study examined the ability of Salmonella enterica serovar Enteritidis and Listeria monocytogenes to grow or survive in mango pulp stored at −20°C, 4°C, 10°C and 25°C, as well as to cross-contaminate mangoes by means of a knife... more
This study examined the ability of Salmonella enterica serovar Enteritidis and Listeria monocytogenes to grow or survive in mango pulp stored at −20°C, 4°C, 10°C and 25°C, as well as to cross-contaminate mangoes by means of a knife contaminated with different levels of these pathogens. At 25°C lag phase durations of 19 h and 7.2 h and generation times of 0.66 and 1.44 were obtained, respectively, for S. Enteritidis and L. monocytogenes. At 10°C only the growth of L. monocytogenes was observed. At 4°C both bacteria survived for 8 days. At −20°C S. Enteritidis was able to survive for 5 months while L. monocytogenes survived for 8 months. Cross-contamination was observed for knives contaminated with 106, 105 and 104 CFU mL−1 of S. Enteritidis and 106 and 105 CFU mL−1 of L. monocytogenes. Both microorganisms can grow well in mango pulp at 25°C, thus lower temperatures for the maintenance of the pulps are crucial to avoid growth of these microorganisms. A refrigeration temperature of 10°C will avoid only the growth of S. Enteritidis. Thus good handling practices should be rigidly enforced to avoid any contamination as even at refrigeration and freezing temperatures survival of these pathogens may occur.