Abstract The objective of this study was to develop, analyze composition and evaluate the microbiological and sensory characteristics of high-protein diet bars (PB) with the addition of chia grain (Salvia hispanica L.), partially replacing isolated soy protein and concentrated whey protein, in proportions of 0, 10, 15 and 20%. The proximate composition was analyzed of PB, for microbiological quality of Bacillus cereus, Filamentous fungi and yeast count, total fecal coliforms, and Salmonella ssp. search. Sensory analysis was performed utilizing acceptance testing of characteristics on a nine-point hedonic scale for various attributes, including purchasing intention of the tested PB. Bars showed 20% moisture, 2.3% ash, 20-23% protein and 19% lipids. The effect of increasing of chia was to increase crude fiber content and decrease total carbohydrate and total energy value. All samples were within the microbiological food standards established by current legislation. All PB formulations obtained a good overall impression index and all characteristics were above mean grades, with the exception of taste (63%) in the PB containing 0% chia. Chia grain has a positive influence on sensory aspects and appears to be an alternative way to increase the nutritional quality of high-protein diet bars.

RESUMO O Buriti é um fruto com potencial para exploração econômica, devido aos seus componentes nutricionais; no entanto, poucas são as pesquisas quanto a suas características pós-colheita. Sendo assim, o objetivo deste trabalho foi determinar as características físicas e químicas e analisar a atividade antioxidante da polpa de buriti. Os frutos foram colhidos em completo estádio de maturação, sanitizados, despolpados e armazenados sob refrigeração até o congelamento. Em seguida a polpa foi submetida às análises de umidade, proteína, glicídios totais e redutores, cinzas, lipídios, fibra bruta, atividade de água, acidez titulável (AT), pH, cor, ß caroteno, a caroteno, atividade antioxidante e valor energético total (VET). As análises foram realizadas em triplicata, sendo determinadas a média, desvio-padrão e o coeficiente de variação. A polpa da fruta apresentou valores de 0,98 para atividade de água, AT de 8,82 g/100g de ácido cítrico, pH de 3,78, 59,69% para umidade, 20,92% de lipídios, 8,56% de fibra bruta, 1,04% de cinzas, 7,28% de glicídios totais, 4,50% para glicídios redutores, 9098µg/100g de ß caroteno e 10086µg/100g de a caroteno. O VET encontrado foi de 229,28 Kcal/100g, a análise de cor mostrou que a polpa possui tonalidade clara com valor médio de L*=59,69, alta tonalidade cromática com H*= 68,36 e cor viva com C*= 62,03. Quanto à atividade antioxidante, observou-se que o buriti é um fruto que pode ser utilizado no combate a oxidação, pois reduziu em 82,42% a quantidade do reagente DPPH utilizado.

ABSTRACT Buriti is a fruit with potential for economic exploitation due to its nutritional components; however, there are few studies about their post-harvest characteristics. Thus, the aim of this study was to determine the physicochemical characteristics and analyze the antioxidant activity of Buriti pulp. Fruits were harvested at full maturity stage, sanitized, pulped and stored under refrigeration until freezing. Then, pulp was submitted to the following analyses: moisture, protein, total carbohydrates and reducing carbohydrates, ashes, lipids, crude fiber, water activity, titratable acidity (TA), pH, color, ß-carotene, a-carotene, antioxidant activity and total energy value (TEV). Analyses were performed in triplicate, and the mean, standard deviation and variation coefficient were determined. Fruit pulp presented 0.98 of water activity, TA of 8.82g/100 g of citric acid, pH 3.78, 59.69% of moisture, 20.92% of fat, 8.56 % of crude fiber, 1.04% of ash, 7.28% of total carbohydrates, 4.50% of reducing carbohydrates, 9098µg/100g of ß carotene and 10086µg/100g of a-carotene. TEV found was 228.28 kcal/100g, the color analysis showed that the pulp has an average light tint value of L * = 59.69, with high hue H * = 68.36 and vivid color with C *= 62.03. Regarding the antioxidant activity, it was observed that Buriti is a fruit that can be used to combat oxidation, as it reduced by 82.42% the amount DPPH reagent used.

RESUMO Objetivo: Descrever a prevalência e o perfil de ingestão de suplementos alimentares entre atletas brasileiros. Métodos: Participaram do estudo 182 atletas de ambos os sexos de 20 diferentes modalidades esportivas. Os atletas responderam a um questionário contendo informações sociodemográficas e esportivas e foram entrevistados quanto ao consumo de suplementos. Resultados: Quarenta e sete porcento dos atletas relataram ter consumido pelo menos um tipo de suplemento e 38% utilizavam mais de três tipos de suplementos concomitantemente. O suplemento mais consumido foi o whey protein e a razão mais citada para o consumo foi a melhora no desempenho físico. A maior fonte de informação foi o treinador, sendo os atletas de modalidades individuais os maiores consumidores e também os mais propensos a buscarem essa fonte. Conclusão: Quase metade da amostra fazia uso de suplementos, os quais eram indicados, predominantemente, pelos treinadores. O perfil de consumo também revelou a prática da poli suplementação e mostra que a educação nutricional é essencial para essa população específica.

ABSTRACT Objective: To investigate the prevalence and establish the profile of the consumption of dietary supplements among Brazilian athletes. Methods: A total of 182 athletes of both genders from 20 different sports participated in this study. The athletes answered a questionnaire containing sociodemographic and sports-related questions and were interviewed about the consumption of dietary supplements. Results: Forty seven percent of athletes reported having consumed at least one type of dietary supplement and 38% said they use more than three different types of supplements concurrently. Whey protein was the most commonly consumed supplement, and the most frequently mentioned reason for its consumption was performance improvement. The main source of information was coaches, and individual sport athletes were the greatest consumers and the most likely to seek dietary supplement. Conclusion: Approximately half of the participants used dietary supplements, which on most occasions were recommended by coaches. The consumption profile also revealed multiple supplementation practice and showed that nutrition education is essential for this specific population.

The objective of this study was to evaluate the effect of addition of different levels of cottonseed (0, 14.35, 27.51 and 34.09 kg/100 kg) in the diet of Nellore steers on the meat characteristics. Thirty-six steers (average initial body weight of 333.50 and average age of 20 months) were kept in feedlot stalls for 94 days, each stall with three animals. The experiment was a completely randomized design with four treatments and nine replications. The values of protein, fixed mineral residue, shear force, lipid oxidation, meat color and fat color were similar among the treatments. The increase of the cottonseed levels in the diet reduced the amount of intramuscular fat and increased the moisture content in the meat linearly. Meat aroma and flavor were negatively influenced when cottonseed addition was greater than 27.51 and 34.09 kg/100 kg of the diet, respectively. Cottonseed diet did not modify the concentration of conjugated linoleic acid, saturated fatty acids or total unsaturated fatty acids, but linearly reduced the concentration of monounsaturated fatty acids in the meat.