Abstract Juçara fruit (Euterpe edulis Martius) is rich in nutrients and antioxidant compounds, a potential ingredient to meet consumer demands for beers with bioactive potential. In this study, different concentrations (10, 20, and 40%) of juçara fruit pulp were added during the brewing steps (mash, fermentation, and maturation). Physicochemical parameters (carbohydrate profile, real extract, pH, alcohol content, glycerol, and color), total phenolic content, and scavenging effect on 2,2-diphenyl-1-picrilhidrazil (DPPH) radical were evaluated during the brewing process and in the beers produced. The sugars, real extract, pH, ethanol, and glycerol did not vary significantly between beers produced with different juçara concentrations. Juçara beers had an average alcohol content of 3.6% (w/v) and a pH of 4.43. The color varied between 3.2 and 16 Standard Reference Method depending on the fruit pulp concentration and the step in which it was added. The addition of juçara fruit pulp increased the total phenolic content (49.57-80.17 mg of gallic acid equivalent 100 mL-1) and the antioxidant effect on DPPH (1785-3971 mmol ascorbic acid equivalent 100 mL-1) in the beers, especially when added in the final production stages. In conclusion, this study demonstrated that the beer produced with 20% of juçara fruit pulp added at maturation presented the best results and suggested that this fruit has enormous potential for use in the brewing process, promoting an increase in the bioactive compounds.

Abstract In the present study, we evaluated the physicochemical characteristics (color, humidity, soluble solids, free acidity, pH, ash content, carbohydrate content, and 5-HMF) and antioxidant activity (Folin-Ciocalteu reagent and DPPH free radical scavenging) of honey samples produced by different species of Meliponinae subfamily (n = 16) and A. mellifera (n = 16) from the Eastern Brazilian Amazon region. Considering global averages, the stingless-bee honey had high acidity (93.45 mEq kg-1), high humidity (27.43%), low content of reducing sugars (55.65%), and darker colors (Pfund scale – 162.17 mm), when compared with A. mellifera honey (62.96 mEq kg-1, 19.35%, 65.70% and 68.43 mm for the respective parameters). Furthermore, more than 50% of samples of stingless-bee honey had values of 5-HMF above that proposed by Codex Alimentarius (max. 80 mg kg-1). The two types of honey investigated showed similar results for total phenolic compounds and antioxidant activity. The principal component analysis (PCA) of the physicochemical characteristics of the honey samples, showed that the A. mellifera samples formed a differentiated group, while the multi-species Meliponinae samples were more scattered along the PCA axes. The distinctive characteristics of stingless-bee honey compared to A. mellifera honey produced in the same region, reinforces the need for specific regulations for honey produced by stingless-bees.

Resumo As palmeiras do gênero Euterpe têm notável importância econômica e cultural, sendo que o seu valor se deve em parte às inúmeras formas de utilização, dentre as quais se destacam o consumo da bebida proveniente dos frutos e do palmito. Este estudo tem por objetivo avaliar a eficiência do tratamento térmico prévio nos frutos de juçara (E. edulis Martius) utilizados para o processamento da polpa de juçara, visando à obtenção de um preparado para bebida, com qualidade nutricional e segura para o consumo. Os frutos foram selecionados, higienizados com hipoclorito de sódio (200 ppm/15 min) e submetidos a três tratamentos térmicos (100 °C/5 s, 80 °C/10 s e 80 °C/30 s). Depois do tratamento foram realizados o despolpamento e o congelamento, seguidos de armazenamento. Os resultados das análises microbiológicas demonstram que é necessário o tratamento térmico a 100 °C/5 s para atender aos parâmetros microbiológicos exigidos pela legislação para polpa de açaí, além de preservar o conteúdo de antocianinas totais e atividade antioxidante. Desta forma, o tratamento térmico dos frutos apresenta-se como um método viável e de baixo custo, contribuindo para a produção da bebida com qualidade e segurança.

Summary Palms of the genus Euterpe have remarkable economic and cultural importance, their value residing, in part, from the numerous forms of use, amongst which one can highlight the consumption of the palm hearts and of a beverage made from their fruits. This study aims to evaluate the efficiency of a prior heat treatment of the juçara fruits (E. edulis Martius) used in the processing of the pulp destined to produce a beverage preparation with high nutritional quality and safe for consumption. The fruits were sorted, sanitized with sodium hypochlorite (200 ppm/15 min) and subjected to three heat treatments (100 °C/5 s, 80 °C/10 s and 80 °C/30 s). After the heat treatments, the fruits were pulped, followed by freezing of the pulp and storage at -20 °C. The results of the microbiological analyses demonstrated that only the treatment at 100 °C/5 s was adequate to conform with the microbiological parameters required by Brazilian legislation for açaí pulp, and also preserve the anthocyanin content and antioxidant activity. In conclusion, the heat treatment (100 °C/5 s) is a feasible, fast and low-cost method, which contributes to the production of a high quality and safe beverage.

As práticas vitícolas mostram crescimento econômico no Estado de Santa Catarina, com produção de uvas que são utilizadas para produzir vinhos e sucos. As uvas são ricas em compostos fenólicos e têm chamado a atenção não somente devido ao importante papel no desenvolvimento de produtos derivados de uvas, mas também por seu potencial efeito benéfico para a saúde. O objetivo deste trabalho foi avaliar sucos de uva comercial, orgânico e artesanal produzidos no Estado de Santa Catarina. Os sucos de uvas foram analisados quanto ao conteúdo de polifenol total, coloração e atividade antioxidante. Os sucos comerciais tiveram os maiores valores médios de antocianinas monoméricas totais e de polifenóis totais. Foi obtida ótima correlação (R = 0,9566) entre a atividade antioxidante e o conteúdo de polifenóis totais nos sucos comerciais. A Análise de Componentes Principais (ACP) mostrou haver forte correlação entre a cor vermelha e as antocianinas monoméricas totais. No entanto, entre as antocianinas monoméricas e as poliméricas ocorreu correlação negativa.

Viticultural practices in the State of Santa Catarina, Brazil, have shown economic growth, with the production of grapes used to produce wines and grape juice. Grapes are rich in phenolic compounds which have drawn attention not only because of their important role in the development of products derived from grapes, but also for their potential beneficial health effects. The objective of this study was to evaluate commercial, organic and homemade grape juices produced in Santa Catarina. Grape juices were analyzed for total phenolic content, colour, and antioxidant activity. The commercial juices had the highest average values for total monomeric anthocyanins and total phenolics. There was a strong positive correlation (R = 0.9566) between the antioxidant activity and total phenolic content for the commercial juice. In addition, the Principle Components Analysis showed a strong positive correlation between the red colour and total monomeric anthocyanins. However, the total monomeric anthocyanis and polymeric anthocyanins showed a negative correlation.

Physalis peruviana é uma fruta exótica pertencente à família Solanaceae com produção recente no Brasil, principalmente na região Sul. Como há poucos dados em relação à sua composição química, este trabalho apresenta a composição centesimal e mineral e o perfil de ácidos graxos da fração lipídica da Physalis peruviana. Em relação à composição centesimal, a physalis apresentou alto conteúdo de cinzas e de lipídios totais, 0,8 e 3,16 g.100 g-1, respectivamente. Em sua composição mineral, o K, Mg, Ca e Fe foram os principais elementos, estando o ferro presente em concentrações superiores em relação a fontes conhecidas como o feijão. A fração lipídica apresenta predominância de ácido linoleico (72,42%) em sua composição.

Physalis peruviana is an exotic fruit that belongs to the Solanaceae family and which has recently started to be produced in Brazil, mainly in the Southern region. Once there is few data regarding its chemical composition, this work presents the centesimal and mineral composition and the fatty acid profile of the lipidic fraction of Physalis peruviana. Concerning the centesimal composition, Physalis presented high contents of ashes and total lipids, 0.8 and 3.16 g.100 g-1, respectively. In its mineral composition, K, Mg, Ca and Fe were the main elements, and Fe is present in concentrations higher than those in the common sources such as beans. The lipidic fraction presented predominance of the linoleic acid (72,42%) in its composition.