4.7 Article

Bacterial cellulose films production by Kombucha symbiotic community cultured on different herbal infusions

期刊

FOOD CHEMISTRY
卷 372, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.131346

关键词

Bacterial cellulose; Kombucha fermentation; Herbs; Yerba mate; Bioactive molecules; Antioxidant capacity; Food packaging

资金

  1. Universidad Nacional de Quilmes (UNQ, Argentina) [PUNQ 990/19]
  2. Agencia Nacional de Promocion Cientifica y Tecnologica (Argentina) [PICT-2015-3150]
  3. CONICET
  4. EVC-CIN (2019)

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The symbiotic community of bacteria and yeast (SCOBY) in Kombucha beverage produces cellulose films in six different herbal infusions, with yerba mate showing remarkable antioxidant activity. The films retained bioactive substances essential for developing active materials.
The symbiotic community of bacteria and yeast (SCOBY) of Kombucha beverage produces a floating film composed of bacterial cellulose, a distinctive biobased material. In this work, Kombucha fermentation was carried out in six different herbal infusions, where SCOBY was able to synthesise cellulosic films. Infusions of black and green tea, yerba mate, lavender, oregano and fennel added with sucrose (100 g/l) were used as culture media. In all cultures, film production resulted in a maximum after 21 days. Yield conversion, process productivity and antioxidant activity were quantified. Macroscopic and microscopic features of films were determined based on electronic microscopy, calorimetric and mechanical properties and hydration behaviour. Native films from yerba mate had a remarkable antioxidant activity of 93 +/- 4% of radical inhibition due to plant polyphenols, which could prevent food oxidation. Results revealed that films retained natural bioactive substances preserving important physicochemical properties, essential for developing active materials.

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