Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopies were applied to characterize and compare the chemical shifts in the polyphenols’ regions of some fruit wines. The obtained results showed that FTIR spectra (1800–900 cm−1) and 1H NMR (δ 6.5–9.3 ppm) of different fruit wines can be used as main indices of the year of vintage and quality of fruit wines. In addition to the classical determination of antioxidant profiles and bioactive substances in wines, fluorometric measurements were used to determine the interactions of wine substances with the main human serum proteins. The results showed relatively high binding properties of wines with the highest one for pomegranate, followed by kiwifruit and persimmon wines. The interactions of vitamin C, catechin and gallic acid with human serum albumin (HSA) were also examined by docking studies. The docking calculations showed that gallic acid has a stronger binding affinity compared to catechin and vitamin C. The stronger binding affinity of gallic acid may be due to three hydrogen bonds and pi–pi interactions. The fluorescence and docking studies proved that only the bioactive compounds of wines and not the amount of alcohol have high binding properties to human serum proteins. The emphasis in this report was made on the utility of FTIR, NMR and fluorescence of wines as a mean of wine authentication and its fingerprint. The findings, based on polyphenols from fruits and fruit wines, their bioactivity and health properties, offer valuable insights for future endeavours focused on designing healthy food products.

This study aimed to investigate the quality characteristics of sourdough produced using a banana starter. The contents of sugar and alcohol of the banana fermented broth increased significantly as the fermentation date increased (p<0.05), and the pH tended to decrease. The titratable acidity of the fermentation broth increased significantly from the 2nd day of fermentation and remained high until the 4th day (p<0.05). The pH of dough and bread decreased as the amount of sour starter added increased (p<0.05), and there was no significant difference in titratable acidity of dough and bread as well as the amount of starter. According to the added amount of banana sour, the moisture content of the bread increased, the crude fat and crude flour content decreased, and the crude protein content hardly changed. The height of bread increased in proportion to the increase in the amount of sour starter added. As for the internal color of the bread, the brightness and yellowness decreased as the addition amount increased, and the redness increased. It was found that the volume, specific volume and baking loss rate of bread increased as the amount of sour starter added increased. In the texture of bread, elasticity and adhesion increased as the amount added increased, but gumminess, brittleness and hardness decreased as the amount added increased. From the above results, it is expected that the banana starter will be used as a useful ingredient in the development of sourdough bread products.