THAISE CRISTINE FERNANDES NUNES

THAISE CRISTINE FERNANDES NUNES

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E-beam irradiation of "in Natura" Palm: texture and color evaluation
2009 - SILVA, P.V.; NUNES, T.C.; FURGERI, C.; VILLAVICENCIO, A.L.C.H.
Evaluation on physical properties of irradiated cabbage (Brassica Oleracea L. var. Acephala)
2009 - NUNES, T.C.F.; ROGOVSHI, D.V.; DUARTE, R.C.; VILLAVICENCIO, A.L.C.H.
Microbiological analysis of peach palm in natura submitted to sup(60)CO radiation
2009 - SILVA, PRISCILA V.; ARAUJO, MICHEL M.; NUNES, THAISE C.F.; COSTA, HELBERT S.F.; HOJEIJE, KHALIL Y.; VILLAVICENCIO, ANNA L.C.H.
The palm tree (Bactris gasipaes Kunth) is a species with high potential benefits, because of the nutritional value of its fruits that could be used both in human and animals feeding and mainly for peach palm extraction. It represents a great source of dietary fiber and a moderate source of magnesium and iron. Food irradiation is a worldwide technology that aims to improve the product quality, in order to eliminate diverse microorganisms that can spoil the food. Radiation processing, in the recommended doses, causes very few chemical alterations and nutritional losses in foods, being considered insignificant and/or similar to other food treatments. The objective of this study was to evaluate the effect of irradiation on microbiological counts of mesophilic aerobic in the peach palm in natura. Samples were irradiated with 1.0 and 1.5kGy using a 60Co multipurpose irradiator. Radiation treatment appeared to be a useful alternative to reduce microbial contamination in the samples analyzed.
Effects of gama-radiation on white tea volatiles
2009 - FANARO, GUSTAVO B.; SILVEIRA, ANA P.M.; NUNES, THAISE C.F.; COSTA, HELBERT S.F.; PURGATTO, EDUARDO; VILLAVICENCIO, ANNA L.C.H.
Tea is the second most widely consumed beverages in the world and is processed from two and a bud of Camellia sinensis (L.). Depending on the processing may give rise to four mainly teas (green, black, oolong and white tea). The white tea is the one that has recently awakened interest in scientific community due the fact that this tea has more antioxidant property and activity than green tea. A further industrialization and commercialization of these plants become a problem of public health. The presence of potentially toxigenic fungi can be found in these products, indicating a great potential for the presence of mycotoxins that can cause acute and chronic effects in different organs and systems of the human body. Ionizing radiation is one of the most effective means disinfecting dry food ingredients. This treatment can inhibit cellular life division, like microorganisms, promoting a molecular structural modification. The aim of this study was evaluate the effects of radiation on volatile formation in white tea. Samples were irradiated in room temperature at 60Co source Gammacell 220 (A.E.C. Ltda) at doses of 0, 5, 10, 15 and 20kGy. The volatiles organic compound was extracted by hydrodestilation and the extract was separated and identified by gas chromatography–mass spectrometry (GC–MS) analysis. The results show that the quantities of volatiles formations are directly proportional to the increase of radiation dose. About 37.86% of the compounds were stable at all radiation doses and 47.53% of new compounds were identified after irradiation.
Use of electron beam on aflatoxins degradation in coconut agar
2009 - ROGOVSCHI, VLADIMIR D.; AQUINO, SIMONE; NUNES, THAISE C.F.; GONCALEZ, EDLAYNE; CORREA, BENEDITO; VILLAVICENCIO, ANNA L.C.H.
sup(60)Co Irradiation effect on color in minimally processed cauliflower (Brassica spp)
2009 - NUNES, THAISE C.F.; ROGOVSCHI, VLADIMIR D.; SANTILLO, AMANDA G.; MICHELS, ROBERT; PITOMBO, RONALDO N.M.; VILLAVICENCIO, ANNA L.C.H.
Advances between e-beams and sup(60)Co applications in soybeam grains
2007 - FANARO, G.B.; SALUM, D.C.; NUNES, T.C.F.; FURGERI, C.; RELA, P.; VILLAVICENCIO, A.L.C.H.
Soybean is the most important oleaginous cultivated in the whole world and generates income of billions of dollar, direct and indirectly and its nutrients become basic for the feeding human being, beyond its byproducts, that offer great diversities of products for the nourishing industry. Between the main factors that limit the attainment of high incomes, are the illnesses caused by microrganism like fungi, bacteria, and viruses that, in general, are difficult to control and cause damages of billions of dollar every year. An alternative to minimize the losses is preserving the grains through the irradiation and then, the use of electron accelerator is indicated, therefore its advantage for exporting industria of grains in relation to the irradiators for 60Co is basic. This work aims to compare the effects of the radiation through viscosimetry, DNA Comet Assay and Cooking time techniques in soybean grains at doses 0, 2.0, 4.0, 6.0kGy irradiated at e-beam accelerator - Radiation Dynamics (Radiation Dinamics Co. model JOB, New York, USA), 1.5 MeV-25mA with the lower energy and in a 60Co source, Gammacell 220 (A.E.C. Ltda) in ambient temperature.
Effects of electron beam treatment in soybean grains artificially inoculated by Phakopsora pachyrhizi
2007 - FANARO, G.B.; SILVA, P.V.; NUNES, T.C.F.; ROGOVSCHI, V.D.; AQUINO, S.; VILLAVICENCIO, A.L.C.H.
Interactions between plants and pathogenic fungi have always been of extreme interest to humanity, since the worldwide economy is built around the purchase and sale of species vegetables among countries, who can suffer serious damages by pathogenic organisms contamination. Soybean is the most important culture of grains in Brazil, which is the second biggest exporter of this grain and suffers from the attack of the fungi Phakopsora pachyrhizi that causes the Asian Soybean Rust. The infection for P. pachyrhizi causes fast blackout and the premature fall of leaves, hindering the full formation of them. The technology of irradiation processing for nutritive purposes is a process that is safe and effective for reducing the microbial load, insect infestation, and extending the shelf life of perishable products. This study aims to verify the artificially inoculated soybeans behavior when treated by electron beam from a linear accelerator at different radiation doses while observing whether the fungi population was reduced or not. The grains of soybean were irradiated at IPEN-CNEN/SP in an electron accelerator of Radiation Dynamics Inc. USA, 1.5 MeV-25mA at doses 0; 1.0; 2.5; 5.0; 7.5 and 10.0 kGy.
Radiation degradation of biological residues (aflatoxins) produced in food laboratory
2007 - ROGOVSCHI, VLADIMIR D.; AQUINO, SIMONE; ZORZETE, PATRICIA; NUNES, THAISE C.F.; TRINDADE, REGINALDO A.; CORREA, BENEDITO; VILLAVICENCIO, ANNA L.C.H.
Some molds have the capacity to produce substances that are toxic and generally cancer-causing agents, such as aflatoxins, that stand between the most important carcinogenic substances (class one of the agents which are certainly carcinogenous for human people according to the “International Agency for Research on Cancer”). Aspergillus spp. is present in world-wide distribution, with predominance in tropical and subtropical regions growing in any substratum. The aim of this work is establish a minimum dose of radiation that degrades aflatoxins produced by fungi Aspergillus spp. The Aspergillus spp. colonies will be cultivated in coconut agar medium and the samples will be conditioned in appropriate bags for irradiation treatment of contaminated material and processed in the Gammacell 220 with dose of 20kGy.
Effects of gamma radiation in cauliflower (Brassica spp) minimally processed
2007 - NUNES, THAISE C.F.; ROGOVSCHI, VLADIMIR D.; THOMAZ, FERNANDA S.; TRINDADE, REGINALDO A.; ALENCAR, SEVERINO M.; VILLAVICENCIO, ANNA L.C.H.