Influence of the Storage in Bottle on the Antioxidant Activities and Related Chemical Characteristics of Wine Spirits Aged with Chestnut Staves and Micro-Oxygenation

Effect of fermentation methods on the quality and in vitro antioxidant properties of Lycium barbarum and Polygonatum cyrtonema compound wine

Lycium barbarum and Polygonatum cyrtonema are known for their medicinal, edible, and ornamental properties. The sensory indices of the novel high-quality L. barbarum and P. cyrtonema compound wine (LPCW) fermented by Saccharomyces cerevisiae RW and Debaryomyces hansenii AS2.45 under different inoculation methods were analyzed. The alcohol content of the LPCW ranged from 3.88 to 4.75 % under three mixed inoculations. The total saponin and total polysaccharide contents in LPCW inoculated with D. hansenii first and S. cerevisiae after 24 h were 4.39 mg/mL and 0.21 mg/mL, respectively. Ethyl butyrate, citronellol, and 3-(methylthio) propanol were unique metabolites of D. hansenii. 4-Methoxybenzoic acid was the core product of brewing of by S. cerevisiae. Except for wine inoculated with S. cerevisiae only, the acceptability scores of all the LPCW samples were higher than 7.3. Our data provided the foundation for the development and application of medicinal and food homologous substances in food fermentation.

Alcoholic Fermentation as a Source of Congeners in Fruit Spirits

Fermentation is a crucial process in the production of alcoholic beverages such as spirits, which produces a number of volatile compounds due to the metabolic activities of yeast. These volatile compounds, together with the volatile components of the raw materials and the volatile compounds produced during the distillation and aging process, play a crucial role in determining the final flavor and aroma of spirits. In this manuscript, we provide a comprehensive overview of yeast fermentation and the volatile compounds produced during alcoholic fermentation. We will establish a link between the microbiome and volatile compounds during alcoholic fermentation and describe the various factors that influence volatile compound production, including yeast strain, temperature, pH, and nutrient availability. We will also discuss the effects of these volatile compounds on the sensory properties of spirits and describe the major aroma compounds in these alcoholic beverages.

Current Technologies to Accelerate the Aging Process of Alcoholic Beverages: A Review

The aging process contributes to the sensory evolution of alcoholic beverages, producing changes in the color and flavor of the final product. Traditionally, aging has occurred by storing beverages in wooden barrels for several months or years. To meet the demand for aged beverages, there is a need for large storage areas, a large number of wooden barrels, and, consequently, large volumes of stored product. Evaporation losses can also occur. In addition to the reactions of the beverage itself, there is also a transfer of wood compounds to the drink, which is later modified by successive oxidation reactions. This study addresses the alternative methods for accelerating the aging stage of beverages. These include the use of wood fragments, ultrasound, micro-oxygenation, pulsed electric field, high hydrostatic pressure, and microwave and gamma irradiation. These methods can be applied to optimize the process of extracting wood compounds, promote free radical formation, reduce oxidation reaction time, and accelerate yeast autolysis time. This study provides examples of some of the aforementioned methods. These technologies add value to the aging process, since they contribute to the reduction of production costs and, consequently, can increase commercial competitiveness.