The increased production of persimmon in recent decades has not been accompanied by market demand, considering the high perishability of the fruit, it is essential to study conservation techniques that seek to extend the shelf-life, ensure quality and food safety and add value to the fruit benefited. Given the above, this study aimed to analyze the bromatological and microbiological characteristics in Fuyu persimmon (Diospyros kaki cv. Fuyu) dehydrated by natural drying in a solar dryer. According to the experimental conditions and based on the results, it was verified that the natural drying process in solar dryer in fruits of Fuyu persimmon was efficient, evidenced by the physicochemical parameters and microbiological standards that are in accordance with the established legislation.
Biosurfactants are natural hydrocarbon surfactant compounds that decrease surface tension and have a high emulsifying capacity. Biosurfactants are produced through microbial metabolic processes and have several advantages over chemical surfactants, including low toxicity and high biodegradability. Bioremediation offers the possibility of eliminating or transforming various contaminant compounds present in soil and water. Fungi are effective transforming agents due to their ability to degrade a diverse variety of organic substances. Thus, considering the potential of fungi to produce biosurfactants and the importance of these compounds for various industrial processes, the objective of this work was to verify the effects and interactions of different concentrations of various nutrients on biosurfactant production in three coprinaceous fungi isolates. These isolates were obtained from spent mushroom substrate (SMS) produced during the edible mushroom growth process. All three fungal isolates, termed FS-4.1, FS-4.2, and FS-4.3, were potential sources for biosurfactant production, as evidenced by the emulsifier index of the fermentation medium. However, biosurfactant production was maximum in isolate FS-4.1, yielding an emulsifier index of 73.45%. To optimize the FS-4.1 biosurfactant production process, corn oil, glycerol, and yeast extract must be absent from the fermentation medium (to minimize negative effects on the process) and increase the amounts of glucose and soy oil.
Multivariate selection of nutrient parameters in submerged culture of kluyveromyces marxianus for biosurfactant production Seleção multivariada de parâmetros nutricionais em cultivo submerso de kluyveromyces marxianus para produção de biossurfactante
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