BACKGROUND Marolo (Annona crassiflora Mart) is a typical savannah fruit that is very nutritious and highly appreciated. However, its consumption has been limited to fresh fruit. The objective of this study was to evaluate the potential use of marolo flour in the production of healthy snack bars to valorise this fruit and provide an alternative ready‐to‐eat nutritious product. Snack bars containing increasing amounts of marolo flour (5 g 100 g−1, 10 g 100 g−1, 15 g 100 g−1, 20 g 100 g−1, expressed in w/w) were produced and the physico‐chemical and sensory characteristics were determined. RESULTS Levels up to 20% marolo flour can be incorporated in snack bars with some minor changes in pH and moisture content but with an increase of 2.4‐fold in dietary fibre content and also 1.3‐fold of vitamin C, minerals and antioxidant activity. In addition, up to 10% marolo flour improves significantly the sensory properties of the snack bars, namely appearance, taste, texture and overall acceptance. CONCLUSION Marolo flour can be considered an alternative flour for obtaining healthy snack bars, with increased nutritional and sensory quality. © 2013 Society of Chemical Industry

BACKGROUND Strawberry quality is one of the most important factors that guarantees consistent commercialization of the fruit and ensures the consumer's satisfaction. This work makes innovative use of random forest (RF) to predict sensory measures of strawberries using physical and physical‐chemical variables. Furthermore, it also employs these same physical and physical‐chemical variables to classify strawberries in the classes "satisfied" or "not satisfied" and "would pay more" or "wouldn't pay more. The RF‐based model predicts the acceptance, expectation, ideal of sweetness, ideal of acidity, and the ideal of succulence based on the physical and physical‐chemical data. Then, the predicted parameters are used as input for the RF‐based classification model. RESULTS The RF achieved a coefficient of determination R2 > 0.72 and a root‐mean‐squared error (RMSE) smaller than 0.17 for the prediction task, which indicates that one can estimate the sensory measures of strawberries using physical and physical–chemical data. Furthermore, the RF was able to classify 87.95% of the strawberry samples correctly into the classes ‘satisfied’ and ‘not satisfied’ and 78.99% in the classes ‘would pay more’ or ‘would not pay more’. A two‐step RF model, which employed both physical and physical–chemical data to classify strawberry samples regarding the consumer's response also correctly classified 100% and 90.32% of the samples with respect to consumers’ satisfaction and their willingness to pay more, respectively. CONCLUSION The results indicate that the developed models can be used in the quality control of strawberries, supporting the establishment of quality standards that consider the consumer's response. The proposed methodology can be extended to control the sensory quality of other fruits. © 2021 Society of Chemical Industry

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1 Efeito do estádio de maturação na composição física, química e bioquímica de amorapreta Effect of maturation stage on the physical, chemical and biochemical composition of black mulberry Efecto de la etapa de maduración sobre la composición física, química y bioquímica de la mora Resumo Este trabalho teve como objetivo avaliar as características físicas, químicas e bioquímicas da amoreira preta (Morus nigra L.) cultivada em Lavras, Minas Gerais, Brasil, em diferentes estádios de maturação. Os frutos foram colhidos e separados em cinco estádios diferentes, de Research, Society and Development, v. 9, n. 4, e49942824, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i4.2824 2 acordo com a cor da superfície. Posteriormente, os frutos foram submetidos às análises físicoquímicas e análise da atividade da pectina metilesterase e poligalacturonase. Com o avanço dos estádios de maturação da amoreira preta, foi possível observar a degradação da clorofila com a síntese concomitante de antocianina. Houve aumento do teor de sólidos solúveis, açúcares e pH, diminuição da acidez total e da taxa respiratória, bem como diminuição da pectina total e aumento da pectina solúvel. Além disso, foi observado um aumento da atividade das enzimas pectina metilesterase e poligalacturonase e consequente amolecimento dos frutos. Palavras-chave: Morus nigra L.; Antocianinas; Pectina; Pectina metilesterase; Poligalacturonase. AbstractThis work aimed to evaluate the physical, chemical and biochemical characteristics of black mulberry (Morus nigra L.) cultivated in Lavras, Minas Gerais, Brazil, at different maturation stages. The fruits were harvested and separated into five different stages according to the color of the surface. Afterwards, the fruits were submitted to the physical and chemical analyses and analysis of pectin methylesterase and polygalacturonase activity. With the advancement in maturation stages of black mulberry, it was possible to observe chlorophyll degradation with concomitant anthocyanin synthesis. There was an increase in soluble solids contents, sugars and pH, decrease of total acidity and respiratory rate as well as decrease of total pectin and increase of the soluble pectin. Furthermore an increase of the activity of the enzymes pectin methylesterase and polygalacturonase and the consequent softening of the fruits was also noted. ResumenEste trabajo tuvo como objetivo evaluar las características físicas, químicas y bioquímicas de la morera negra (Morus nigra L.) cultivada en Lavras, Minas Gerais, Brasil, en diferentes etapas de maduración. Los frutos fueron cosechados y separados en cinco etapas diferentes, de acuerdo con el color de la superficie. Posteriormente, los frutos fueron sometidos a análisis físico-químicos y análisis de la actividad de la pectina metilesterasa y la poligalacturonasa.Con el avance de las etapas de maduración de la morera negra, fue posible observar la degradación de la clorofila con la síntesis concomitante de antocianina. Hubo un aumento en el contenido de sólido...

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In this study, exploratory methods and the simplex-centroid design were applied in the development of food bars with cocoa shell, soy and green banana flours that were evaluated sensorially. The results of the chemical composition and texture were submitted to the Scott-Knott test and the Principal Component Analysis, and was observed a significant difference between the treatments (P < 0.05), as well as a tendency to form five groups, according to its nutritional characteristics. The design used to optimise the sensorial acceptance of the food bars was effective, whose contour surface indicated an optimal region with greater acceptance, with all formulations having good acceptance (scores above 5.52). Check-All-That-Apply, Contingency Analysis and Hierarchical Cluster Analysis allowed describing the products, demonstrating the sensory differences between treatments with the presence/absence of cocoa shell. It is concluded that the studied ingredients can be used in food bars, providing nutritional and sensory characteristics acceptable to the consumer.

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The purpose of the study was to evaluate the antioxidant activity, rheological behaviour, oxidative stability, and antibacterial potential of coffee oils (Coffea arabica L.). The extraction process took place from green and roasted beans, by cold pressing, and filtration via filtering card. The experimental design consisted of five treatments: R100 (100% roasted oil); R75G25 (75% roasted oil and 25% green oil); R50G50 (50% roasted oil and 50% green oil); R25G75 (25% roasted oil and 75% green oil), and G100 (100% green oil). The treatment R75G25 showed a higher content of total phenolic compounds and higher DPPH• and ABTS•+ anti-radical efficiency. Regarding rheological behaviour, all coffee oils can be characterized as Newtonian fluids because the shear stress and strain rate varied linearly, with the line intersecting at zero. The treatments R75G25 and R25G75 showed a longer oxidation induction time, in the oxidative stability analysis, in addition to antibacterial activity having been verified for all oil samples. Besides that, the investigated green and roasted coffee oils are sources of fatty acids, including from the omega 3, 6, and 9 classes. Therefore, the use of arabica coffee oil mixtures as natural preservatives in food can be considered a promising alternative for the partial replacement of chemical additives in food matrices and in cosmetic formulations allowing the development of innovative products.