Luciana del Valle, Rivero; Carmen, Maturano; Maria Jose, Rodriguez-Vaquero; Maria, Saguir Fabiana published the artcile< Utilization of Oenococcus oeni strains to ferment grape juice: Metabolic activities and beneficial health potential>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is utilization Oenococcus strain ferment grape juice; Antibacterial activity; Antioxidant capacity; Grape juice; Metabolism; Oenococcus oeni.
This study aimed to investigate the behavior of Oenococcus oeni MS9 and MS46 strains in sterile grape juice (SGJ, pH 4.0) incubated at 30°C, in terms of growth and glucose, organic acids and total phenolic compounds utilization. In addition, their antimicrobial activity and the changes in antioxidant properties of fermented juice with selected strain were evaluated. Both strains grew without lag period by ∼1.40 log CFU/mL at 12 days with maximum growth rates of about 0.019 h-1. After this time the MS9 and MS46 strains counts declined by 0.6 log units and remained unchanged resp. O. oeni MS46 was evaluated in SGJ for low inoculum size (∼104 CFU/mL). In this condition it also grew without lag period by 3.11 ± 0.01 log CFU/mL with a μmax of 0.05 h-1. Glucose and L-malic and citric acids were simultaneously utilized but at different rates and extents, yielding mainly lactic acid with concomitant pH reduction Acetic acid ranged between 11 and 19 mmol/L. Total phenolic compounds significantly decreased in fermented SGJ with strain MS9 but not MS46. In this last condition, the antioxidant activity increased by 21%. In addition, both O. oeni strains showed antibacterial properties against Escherichia coli 700, Salmonella Typhimurium and Listeria monocytogenes. O. oeni strains, especially MS46, with the ability to growth in SGJ, high malolactic potential and adequate sugars and organic acids profiles from the sensorial viewpoint may be used to ferment grape juice with safer and healthier properties than fresh juice.
Food Microbiology published new progress about Antimicrobial agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.
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