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Search Results: 1 - 10 of 210 matches for " Lucimara;Walder "
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Sinergia da radia??o ionizante e do aquecimento na vida de prateleira da uva ?Itália?
Domarco, Rachel Elisabeth;Spoto, Marta Helena Fillet;Blumer, Lucimara;Walder, Júlio Marcos Melges;
Scientia Agricola , 1999, DOI: 10.1590/S0103-90161999000400028
Abstract: the storage behavior of grapes cv. italia, immersed in hot water and irradiated with different radiation doses was studied through their chemical analysis (soluble solids, titrable acidity and ph) and sensorial analysis (overall appearance and firmness). samples of 500g of grapes were used in 4 replicates per treatment . part of them were immersed in hot water (50°c for 5 min) before irradiation and part was irradiated at room temperature (22°c - 25°c). the irradiation was performed using a cobalto-60 source, type gammabeam-650. the dose rate was 1.89 kgy/h. the radiaton doses were 0 (control), 1, 2, 3, 4 and 5 kgy. after irradiation the samples were placed in cartoon boxes and stored under refrigeration at 6°c - 8°c. the chemical and sensorial analysis were performed after 60 days of storage. the titrable acidity and the ph increased significantly with increasing radiation doses. the heat and gamma radiation treatments, combined or not, did not extended the grape shelf life.
Sinergia da radia o ionizante e do aquecimento na vida de prateleira da uva ?Itália?
Domarco Rachel Elisabeth,Spoto Marta Helena Fillet,Blumer Lucimara,Walder Júlio Marcos Melges
Scientia Agricola , 1999,
Abstract: O comportamento de uva cv. Itália, aquecida e irradiada com diferentes doses de radia o ionizante, foi estudado através de análises químicas (teor de sólidos solúveis, acidez titulável e pH) e análise sensorial (aparência e firmeza). Para o experimento, foram utilizados aproximadamente 500g de uva por amostra e 4 repeti es por tratamento. Uma parte foi aquecida por imers o em água (50°C por 5 minutos), antes da irradia o, outra parte foi irradiada à temperatura ambiente (22-25°C). Para a irradia o, utilizou-se uma fonte de Cobalto-60, tipo Gammabeam-650, a uma taxa de dose de 1,89 kGy/h. As doses utilizadas foram, 0 (controle), 1, 2, 3, 4 e 5 kGy. Após a irradia o as amostras foram acondicionadas em caixas de papel o e armazenadas sob temperatura de refrigera o (6°C - 8°C). As análises químicas e sensorial foram realizadas após 60 dias de armazenamento. Observou-se um aumento na acidez titulável e no pH, em fun o das doses de radia o. O teor de sólidos solúveis e a rela o sólidos solúveis/acidez titulável foram maiores nas amostras aquecidas. O tratamento térmico e a radia o gama, isolados ou combinados, n o promoveram o aumento de vida de prateleira de uva Itália.
Radia??o gama na redu??o da carga microbiana de filés de frango
SPOTO, Marta Helena Filet;GALLO, Cláudio Rosa;DOMARCO, Raquel Elisabeth;ALCARDE, André Ricardo;WALDER, Júlio Marcos Melges;BLUMER, Lucimara;
Ciência e Tecnologia de Alimentos , 1999, DOI: 10.1590/S0101-20611999000300018
Abstract: this work evaluate the effect of gamma radiation on reduction of the microbial contamination in chicken steaks stored under refrigeration. microbial activity causes deterioration in poultry. irradiation is a process of food preservation by reduction of the number of the microorganisms. the experimental design was in random blocks with 5 factors (storage periods) and 5 levels (radiation doses), with three replicates. the samples of chicken steak were irradiated with 0.0, 2.0, 4.0, 6.0 and 8.0kgy and stored under refrigeration (± 5oc) for 1, 7, 14, 21 and 28 days. the total count of the microorganisms was accomplished by pour plate in pca medium. the microbiological count of the non-irradiated samples increased in two logarithmic cycles during the storage period of twenty-eight days (from 105 to 107cfu/g), while the microbiological count of the samples irradiated with 2.0kgy increased in one logarithmic cycle during the same period (from 103 to 104cfu/g). the doses of 4.0, 6.0 and 8.0kgy reduced the microbial contamination of the samples to levels of 102cfu/g at the twenty-first and to 101cfu/g at the twenty-eighth day of storage. gamma irradiation can be an efficient process to reduce the microbial contamination of chicken steaks because the dose of 4.0kgy was enough to keep the chicken steaks refrigerated with 101cfu/g for up to twenty-eight days.
Gamma irradiation in the control of pathogenic bacteria in refrigerated ground chicken meat
Spoto, Marta Helena Filet;Gallo, Cláudio Rosa;Alcarde, André Ricardo;Gurgel, Maria Sílvia do Amaral;Blumer, Lucimara;Walder, Júlio Marcos Melges;Domarco, Rachel Elisabeth;
Scientia Agricola , 2000, DOI: 10.1590/S0103-90162000000300003
Abstract: this work evaluated the effect of gamma radiation on reducting the population of staphylococcus aureus, escherichia coli and salmonella typhimurium in ground chicken breast stored under refrigeration. the experiment included a control and 4 doses of gamma radiation (2.0, 4.0, 6.0 and 8.0 kgy) along with 5 periods of storage under refrigeration (1, 7, 14, 21 and 28 days). samples of ground chicken breast were inoculated with staphylococcus aureus (atcc 14458), escherichia coli (atcc 11105) and salmonella typhimurium (atcc 0626), irradiated at temperatures between 4 and 8°c and stored under refrigeration (5°c) for 28 days. the increased radiation dose and period of storage under refrigeration caused a reduction of staphylococcus aureus, escherichia coli and salmonella typhimurium populations in the ground chicken breast. mean radiation d values determined for staphylococcus aureus and escherichia coli were 0.41 and 0.72 kgy, respectively. gamma irradiation was an effective treatment for chicken meat conservation because the radiation dose of 6.0 kgy kept the ground chicken breast within the microbiological limits established by the brazilian legislation, for up to 28 days under refrigeration.
Analysing interaction effects in forests using the mark correlation function
Walder O,Walder K
Forest@ , 2007, DOI: -
Abstract: The spatial distribution of trees in forests can be described and modelled by point processes where the points are given by the locations (coordinates) of the trees. Further properties of a tree like height or mean crown radius can be interpreted as so called marks of the considered point process characterising the points or trees in some way. The so called mark correlation function describes the spatial correlation of these marks in the observed point pattern. In this paper we introduce a special mark, the overlapping or crown index. We show that mark correlation functions for the considered marks help to understand interaction effects of forest trees.
Modeling the fine root biomass dispersion using a special influence function
Walder O,Walder K
iForest : Biogeosciences and Forestry , 2008, DOI: 10.3832/ifor0469-0010141
Abstract: This paper presents a successful application of techniques from the adjustment theory for modeling interaction in fine root biomass dispersion. Using special distance and species dependent weightings the influence function for fine root biomass dispersion of two species is estimated. Using the estimated influence functions the fine root biomass is predicted at the locations where the real data was sampled. Goodness of fit of our model is evaluated by comparing sample values and predicted values. However, the results show successful coincidence between sampled and predicted values. Finally, we present an example for the root dispersion in a mixed stand of beeches and spruces in Saxony/Germany.
Analysing interaction effects in forests using the mark correlation function
Walder O,Walder K
iForest : Biogeosciences and Forestry , 2008, DOI: -
Abstract: The spatial distribution of trees in forests can be described and modelled by point processes where the points are given by the locations (coordinates) of the trees. Further properties of a tree like height or mean crown radius can be interpreted as so called marks of the considered point process characterising the points or trees in some way. The so called mark correlation function describes the spatial correlation of these marks in the observed point pattern. In this paper we introduce a special mark, the overlapping or crown index. We show that mark correlation functions for the considered marks help to understand interaction effects of forest trees.
El cuerpo fragmentado
Paul Walder
Polis : Revista de la Universidad Bolivariana , 2004,
Abstract:
La palabra circulante. Territorialización económica del lenguaje
Paul Walder
Polis : Revista de la Universidad Bolivariana , 2004,
Abstract:
Studies of CP-conserving and CP-violating Bs mixing parameters with the D0 experiment
James Walder
Physics , 2007,
Abstract: This paper summarises the recent results of the Run IIa D0 experiment at the Tevatron Collider at Fermilab on the observable parameters of the $B_{s}$ meson. A measurement of the branching fraction $B_s->D_s^{(*)}D_s^{(*)}$ is reported, which provides an estimate of the width difference $\Delta\Gamma_{s}^{CP}/\Delta\Gamma_{s}$. Through the decay $B_{s} \to J/\psi \phi$ the width difference $\Delta\Gamma_{s}$ is extracted, and for the first time a constraint is set on the CP-violating phase $\phi_{s}$, although a four-fold ambiguity remains. This result is combined with other D0 measurements to yield $\Delta\Gamma_{s}=0.13\pm0.09 {\rm ps^{-1}}$, $\phi_{s} = -0.70^{+0.47}_{-0.39}$.
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