HELBERT SANCHES FRANCO COSTA

HELBERT SANCHES FRANCO COSTA

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Effects of gamma radiation on sensorial properties in black tea
2009 - SILVEIRA, ANA P.M.; FANARO, GUSTAVO B.; COSTA, HELBERT S.F.; SILVA, PRISCILA V.; SANTILLO, AMANDA G.; VILLAVICENCIO, ANNA L.C.H.
Gamma irradiation as a quarantine treatment for Neoleucinodes Elegantalis in tomato fruit
2009 - COSTA, HELBERT S.F.; FANARO, GUSTAVO B.; ARAUJO, MICHEL M.; SANTILLO, AMANDA G.; FARIA, JOSE T.; ARTHUR, VALTER; VILLAVICENCIO, ANNA 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.
Gamma irradiation as a quarantine treatment against eggs of citrus black fly (Aleurocanthus Woglumi Ashby)
2009 - VILLAVICENCIO, ANNA L.C.H.; ARAUJO, MICHEL M.; FANARO, GUSTAVO B.; COSTA, HELBERT S.F.; SILVA, PRISCILA P.V.; ARHUR, VALTER; FARIA, JOSE T.
The citrus black fruit fly (Aleurocanthus woglumi Ashby) is an important pest of citrus originated in Southeast Asia and its first record in the new world was in Jamaica in 1913. In Brazil, it was detected in 2001 in the state of Pará and more recently it was detected in São Paulo in 2008. This pest that attacks over 300 species of plants, but its main host are citrus. It is an A2 quarantine pest, because it is not spread throughout the country. The objective of this study was to test doses of 0 (control), 25, 50, 75, 100, 125, 150, 175 and 200Gy of gamma irradiation for disinfection of eggs of the citrus black fruit fly in leaves of citrus plants. Treatment consisted of 5 replicates with 60 eggs each. Evaluations were performed in the following periods: 1, 3, 5, 7 and 10 days after irradiation. Under the conditions assayed, it could be concluded that a dose of 200Gy caused 100% mortality of Aleurocanthus woglumi Ashby eggs and could be recommended as a successful quarantine processing against infested plants.
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.
Tolerance of edible flowers to gamma irradiation
2011 - KOIKE, AMANDA C.R.; ARAUJO, MICHEL M.; COSTA, HELBERT S.F.; ALMEIDA, MARIANA C.; VILLAVICENCIO, ANNA L.C.H.