6533b826fe1ef96bd1283c3f

RESEARCH PRODUCT

Characterization of kefir-like beverages produced from vegetable juices

Walter RandazzoAlessandro MiceliNicola FrancescaHüseyin ErtenOnofrio CoronaGiancarlo MoschettiRosa GuarcelloLuca Settanni

subject

0106 biological sciencesVegetable juicesMelonFunctional foodsMicroorganismMicroorganismsSettore AGR/04 - Orticoltura E Floricoltura01 natural sciencesTerpeneFermentation Functional foods Kefir-like beverages Microorganisms Vegetable juiceschemistry.chemical_compound0404 agricultural biotechnology010608 biotechnologyFood sciencebiologyKefirfood and beveragesSettore AGR/15 - Scienze E Tecnologie Alimentari04 agricultural and veterinary sciencesbiology.organism_classification040401 food scienceLactic acidKefir-like beverageschemistryFermentationFermentationLactic acid fermentationBacteriaSettore AGR/16 - Microbiologia AgrariaFood Science

description

The aim of this work was to develop new non-dairy fermented beverages using vegetable juices as fermentable substrates. Carrot, fennel, melon, onion, tomato and strawberry juices underwent back-slopping fermentations, carried out by water kefir microorganisms. Results indicated that lactic acid bacteria and yeasts were capable of growing in the juices tested. Melon juice registered the highest numbers of microorganisms. Almost all juices underwent a lactic fermentation. After fermentation, there was observance of a decrease of the soluble solid content and an increase of the number of volatile organic compounds. In particular, esters were present in high amounts after the fermentation, especially in strawberry, onion and melon, whereas carrot and fennel registered a significant increase of terpenes. The concentration of alcohols increased, while that of aldehydes decreased. Changes in colour attributes were registered. Strawberry, onion and tomato juices retained a high antioxidant activity after fermentation. The overall quality assessment indicated that carrot kefir-like beverage (KLB) was the product mostly appreciated by the judges. These findings support the further development of vegetable KLBs with additional benefits and functional properties. © 2015 Elsevier Ltd.

yearjournalcountryeditionlanguage
2016-03-01LWT - Food Science and Technology
https://doi.org/10.1016/j.lwt.2015.11.014