2022
Alonso-Vargas, M.; Téllez-Jurado, A.; Gómez-Aldapa, C.A.; Ramírez-Vargas, M.d.R.; Conde-Báez, L.; Castro-Rosas, J.; Cadena-Ramírez, A. Optimization of 2-Phenylethanol Production from Sweet Whey Fermentation Using Kluyveromyces marxianus. Fermentation 2022, 8, 39. https://doi.org/10.3390/fermentation8020039
Abstract
The growing demand for natural products benefits the development of bioprocesses to obtain value-added compounds using residues such as sweet whey, which is rich in lactose. The yeast Kluyveromyces marxianus can ferment sweet whey to obtain 2-phenylethanol (2-PhEtOH), which is a superior alcohol with a rose aroma. Such fermentation only requires the addition of L-phenylalanine (precursor) and (NH4)2SO4 (salt). Therefore, it was sought to improve the fermentation conditions to produce 2-PhEtOH, which, in turn, would achieve the maximum decrease in the Chemical Oxygen Demand (COD) of the fermentation medium. With the use of the Response Surface Methodology and the application of a Central Composite Design for optimization, two parameters were evaluated as a function of time: salt concentration and precursor. The experimental data were adjusted to a second order polynomial, identifying that the precursor concentration presents a statistically significant effect. The best conditions were: 4.50 g/L of precursor and 0.76 g/L of salt, with a maximum production of 1.2 g/L (2-PhEtOH) at 48 h and achieving a maximum percentage of COD removal of 76% at 96 h. Finally, the optimal conditions were experimentally validated, recommending the use of the model.
EFECTO DEL EXTRACTO DE LA CEREZA EN LA REDUCCIÓN DE COLESTEROL.
CALIDAD MICROBIOLÓGICA DE PALETAS BASE AGUA Y BASE LÁCTEA ELABORADAS EN EL ESTADO DE HIDALGO, MÉXICO
CARACTERIZACIÓN DEL ALMIDÓN DE DOS VARIEDADES DE SORGO DEL ESTADO DE TAMAULIPAS
Chemical and Physicochemical Properties of Maize Starch After Industrial Nixtamalization
AUMENTO DE LA ESTABILIDAD DEL COLOR DE EXTRACTOS DE ZARZAMORA MEDIANTE REACCIONES DE CONDENSACIÓN.