Yong Kun Park

Própolis produzida no sul do Brasil, Argentina e Uruguai: evidências fitoquímicas de sua origem vegetal

Propolis is a resinous hive product collected by honeybees from plant source. The composition of the propolis depends upon the time, vegetation and the area of collection. Propolis produced by africanized Apis mellifera from south Brazil, Argentine and Uruguay have been investigated using chromatographic techniques. In accordance with results RP-HPTLC, RP-HPLC, and GC-MS, propolis from south Brazil were classified IN 5 groups. Based on chemical evidence Populus alba was shown to be the main propolis source of group 3 from south Brazil, Argentine and Uruguay.

Composição química de Baccharis dracunculifolia, fonte botânica das própolis dos estados de São Paulo e Minas Gerais

Propolis is a resinous hive product COLLected by honeybees from plant sources. The composition of the propolis depends upon the season, vegetation, and the area of COLLection. Phytochemical analyses of propolis produced from Baccharis dracunculifolia (alecrim-do-campo) in the states of Sao Paulo and Minas Gerais by africanized - were done by RP-HPTLC, RP-HPLC and GC-MS, and the absorption spectra was measured by UV-visible spectrophotometry. A distinctive characteristic of propolis and B. dracunculifolia was that both had a high proportion of the phenolic compounds artepillin C and others dihydrocinnamic acid derivatives. Based on phytochemical evidence, B. dracunculifolia was found to be the main source of propolis produced in the states of Sao Paulo and Minas Gerais.

Frutooligossacarídeos: implicações na saúde humana e utilização em alimentos

Fructooligosaccharides (FOS) are digestible by human metabolism and non caloric. They are recognyzed as prebiotics: non digestible food ingredient that have a selective stimulation of the growth of probiotics like Acidophillus and Bifidus. These microrganisms promote healty benefits, since decrease in blood cholesterol untill decrease of the potential for several human pathologies like cancer. This review is about FOS health effects, and some FOS applications, specially in food industry.

Conversão de malonil-beta-glicosil isoflavonas em isoflavonas glicosadas presentes em alguns cultivares de soja brasileira

Sendo o Brasil um grande produtor mundial de soja, torna-se necessario uma avaliacao do teor de isoflavonas naqueles cultivares de maior importância para o setor agricola e a verificacao do efeito da temperatura na composicao destas isoflavonas na soja. Neste trabalho pode-se observar que na temperatura de 25oC, o cultivar IAC Foscarin 31-1 apresentou teor medio de isoflavonas de 1405mg/g, enquanto que o cultivar IAC 15-1 apresentou cerca de 3008mg/g. O aquecimento a 121oC durante 40 minutos promoveu uma reducao de ate 17,6 vezes no teor de malonil isoflavonas e um aumento de aproximadamente 2,6 vezes na concentracao de glicosil isoflavonas.

AVALIAÇÃo DO TEOR DE ISOFLAVONAS EM SOJA BRASILEIRA SURVEY OF ISOFLAVONE CONTENTS IN BRAZILIAN SOYBEAN EVALUACIÓN DEL CONTENIDO DE ISOFLAVONAS EN SOJA BRASILEIRA

Abstract This work reports the isoflavone contents of soybean (Glycine max. L) cultivars from the Agronomic Institute of Campinas (IAC), Brazil. The effect of the temperature on extraction of soybean isoflavones was also studied. At 25°C, the IAC Foscarin 31-1 cultivar showed mean content of 1405 mg/g, whereas the IAC 15-1 cultivar showed about 3008 mg/g. Heating at 121°C for 40 min, the malonyl isofavone concentration was 17.6 times lower and the glycoside isoflavones was of 2.5 times higher.

Comparative antiproliferation of human prostate cancer cells by ethanolic extracts of two groups of Brazilian propolis

Two groups of propolis, group 12, which was collected in the southeastern Brazil and group 13, which was collected in the northeastern Brazil, were examined for antiproliferation of primary malignant tumor (RC-58T/h/SA#4)-derived human prostate cancer cells and human prostate epithelial cells. The strongest inhibition of RC-58T/h/SA#4 cells was observed in propolis group 13 extracts, whereas moderate growth inhibition was observed in human prostate epithelial cells in comparison with group 12. It can be said that the Brazilian propolis of group 13 contains important chemical ingredients.

TRANSFORMACIÓN DE LAS β-GLICOSIL ISOFLAVONAS POR FERMENTACIÓN SEMI-SÓLIDA DE HARINA DE SOJA CON Aspergillus oryzae TRANSFORMATION OF β-GLUCOSIDE ISOFLAVONES ON SOLID-STATE FERMENTATION OF THE SOY FLOUR WITH Aspergillus oryzae TRANSFORMACIÓN DAS β-GLICOSIL-ISOFLAVONAS POR FERMENTACIÓN SEMI-SÓLIDA DE FARIÑA DE SOIA CON Aspergillus oryzae

Abstract The fungus filamentous Aspergillus oryzae ATCC 22786 produces high β-glucosidase activity, which is able to convert glucoside isoflavone to aglycones forms present into soybean flour. The glucoside isoflavones were obtained from defatted soy flour by alcoholic extraction using 80% methanol. It was observed that the glucoside isoflavones extracted, such as daidzin, glycitin and genistin, were efficiently transformed into their aglycones forms (daidzein, glycitein and genistein) by solid-state fermentation after 48 h at 30°C with A. oryzae spores.