Composição química e propriedades funcionais no processamento de vinagres / Chemical composition and functional properties in the processing fo vinegar

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

21/09/2011

RESUMO

The fruit vinegars increasingly become popular on the planet, being produced from various crops or their residues, using classical and modern techniques. These products have great variety of organic acids, vitamins, minerals, phenolic compounds and other elements with important physiological functions. Vinegar higher quality depends more on their secondary compounds than acetic acid, although the Brazilian reality shows another situation: the general culture does not value the quality of vinegar consumed, which determines the low prices of the product on the market, as well as ignoble raw materials, processes end up as only prioritize the acetic acid. The objective of this research is to study the aggregation of sensory and functional compounds in vinegars produced from different raw materials. The vinegars studied were produced from rice, sugarcane, corn, honey, starfruit, kiwi, orange, apple, passion fruit, grapefruit and grapes. The vinegars of rice, corn and sugar cane were derived from ethanol and ?cachaça?. The musts were obtained by macerating fruit, adding sufficient quantity of enzyme preparation with correction of sugar contents by the use of sacarose. Then we performed the alcoholic fermentation using yeast lyophilized "Y904". From the resulting wine, was proceeded to acetic fermentation by German method and determined the following characteristics: a) total acidity, b) volatile acidity; c) fixed acidity; d) pH; e) dry stratum f) minerals g) total sugars; h) alcohol content; i) methanol; j) sulfur dioxide; k) sulfate; l) total chloride m) volatile compounds (acetaldehyde, ethyl acetate, methanol, diacetyl, butyl acetate, isobutanol , hexanol), n) phenolic content (Folin-Ciocalteau) and antioxidant capacity (DPPH radical scavenging). The vinegars were in accordance with standards established by law and appropriate to the parameters recommended in the scientific literature. There was wide variation in levels of volatile compounds and ethyl acetate was the only one present in all samples. In vinegars made with distilled raw materials, lower values were observed for total phenolic compounds and DPPH radical scavenging compared with those produced from fruit, however, these compounds were absent in the raw materials used (cachaça, ethanol from rice and ethanol from corn). In the production of fruit vinegars, the composition of each cultivar have great influence on the phenolic content and antioxidant capacity of wines and vinegars. Juice, wine and vinegar produced from grapes showed the highest values of DPPH radical scavenging in comparison with other samples, despite not having the highest levels of phenolic compounds. But when the vinegars was diluted to reach 4% (w / v) total acidity, the product from grapefruit topped the other with regard to functional characteristics studied. The vinegars produced were separated into four groups by multivariate analysis: (1) those made with distilled raw materials (rice, corn and cachaça), (2) the vinegar made from honey, (3) grape vinegar and (4) obtained from the star fruit, kiwi, orange, apple, passion fruit and grapefruit

ASSUNTO(S)

capacidade antioxidante compostos voláteis vinegar phenolic compounds antioxidant capacity volatile compounds vinagre compostos fenólicos

ACESSO AO ARTIGO

Documentos Relacionados