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Among the fruit species of the Brazilian cerrado is pequi (Caryocar brasiliense Camb.), recognized for its nutritional properties and profile of bioactive compounds. However, it is necessary to evaluate techniques that promote its stability, reducing the moisture content without degrading the content of natural antioxidants. Therefore, this study aimed to evaluate the drying of pequi pulp in an oven at different temperatures (40 °C and 55 °C), as well as determine its kinetics and influence on the content of bioactive compounds and antioxidant capacity. The increase in temperature showed a reduction (∼50 %) of the drying time, from 720 min (40 °C) to 360 min (55 °C), with a final moisture content of approximately 39 %, which is the optimized condition of the process. (360 min - 55 °C). Drying at 55 °C showed better retention of carotenoids (β-carotene, α-carotene, and β-cryptoxanthin), especially β-carotene, an important precursor of vitamin A, with retention of approximately 57 %. The results for antioxidant capacity (ABTS and DPPH), total phenolic compounds, total phenolic acids and total flavonoids confirmed that a longer drying time resulted in greater degradation of bioactive compounds, even at lower temperatures. The profile of phenolic compounds of the sample subjected to drying under optimized conditions was identified by HPLC-DAD-ESI-MS n , which showed the presence of six phenolic acids, one isoprenoid plant hormone, nine flavonols, and one flavonoid. Optimizing pequi pulp drying in ovens, and controlling time and temperature, can significantly reduce energy expenditure. This practice not only meets the demands of the food industry but also increases the use of fruits from the cerrado, promoting the diversification and valorization of these products., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Paula Becker Pertuzatti reports financial support was provided by National Council for Scientific and Technological Development. Paula Becker Pertuzatti reports financial support was provided by Foundation for Research Support of Mato Grosso State. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)

In this study, the influence of the concentration of flour from jabuticaba peel (FJP) and the concentration of glycerol (CG) on the physicochemical, barrier, mechanical, optical, spectroscopic and biodegradability properties of corn starch films was evaluated using response surface methodology. The increase in the concentrations of FJP and CG enhanced the thickness and permeability to water vapor, and made the films more hydrophilic. In addition to that, the interaction between the two variables caused reduction in the solubility of the films. High concentrations of FJP and CG reduced the maximum tensile strength, and increased CG increased the elongation and decreased the young's modulus of the films. Among the tests studied, the T1 film (15.80% FJP and 15.80% CG) was biodegradable, presenting the best mechanical and barrier properties such as low water vapor permeability, solubility and water holding capacity, showing great potential to be used as biodegradable packaging system., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Although blueberries are widely studied, little information exists on their composition and content of flavonol glycosides. Most studies identify only a few flavonols in blueberries due to separation and identification issues. In the present study, we identified 44 flavonols and chlorogenic acid in 30 samples of Highbush and Rabbiteye blueberry, using HPLC-DAD-ESI-MS n . Highbush group fruits presented mainly quercetin-3-galactoside in their composition, while Rabbiteye group fruits exhibited higher levels of quercetin-3-rhamnoside and quercetin-3-glucuronide. Among the identified flavonols, 8 acylates (acetyl and hydroxymethylglutaroyl) were found, of which quercetin-3-O-[4″-(3-hydroxy-3-methylglutaroyl)]-α-rhamnoside was found for the first time in blueberries. This compound is exclusive to the cultivars Florida and Powderblue, where it is present in high quantities. Glucuronides of syringetin and laricitrin, and rhamnosyl-galactosides of myricetin, quercetin and isorhamnetin were also found for the first time in blueberries. The Principal Component Analysis showed that blueberry groups can be distinguished based on their phenolic compound profile., (Copyright © 2020 Elsevier Ltd. All rights reserved.)