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Dartora B, Hickert LR, Fabricio MF, Ayub MAZ, Furlan JM, Wagner R, Perez KJ, Sant'Anna V. Understanding the effect of fermentation time on physicochemical characteristics, sensory attributes, and volatile compounds in green tea kombucha. Food Res Int 2023; 174:113569. [PMID: 37986521 DOI: 10.1016/j.foodres.2023.113569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 10/03/2023] [Accepted: 10/09/2023] [Indexed: 11/22/2023]
Abstract
Kombuchas are a trend in the fermented beverage field and the effect of fermentation time on their characteristics is necessary to better understand the process, mainly concerning volatile compounds, which are scarce information in the current literature. Thus, the present work aimed to evaluate the features of green tea kombucha during fermentation, monitoring the changes in pH, acidity, turbidity, polyphenols, ethanol, acetic acid, volatile compounds, and sensory profile and acceptance up to 14 days of fermentation. Kombuchas' pH and acidity decreased through time as expected, but after 4 days of fermentation, the beverage exceeded the Brazilian legal limits of acidity (130 mEq/L) and produced more than 0.5% AVB, which labels the beverage as alcoholic. Total polyphenols and condensed tannins content enhanced until the seventh day of fermentation and remained constant. Fermentation highly impacted the aroma of the infusion with a high formation of volatile acids, such as alcohols, esters, and ketones. Aldehydes were degraded during the bioprocess. Sensory characterization of kombucha showed that fermentation of 4 days increased perceived turbidity; vinegar, citric fruit, acid, and alcoholic aroma; and produced the beverage with sour, bitter, and vinegar flavor. Thus, the fermentation time of kombuchas must be controlled as they rapidly change and impact on the physicochemical parameters and sensory profile of the beverage can be negative.
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Affiliation(s)
- Bruna Dartora
- Life and Environmental Area, State University of Rio Grande do Sul, Encantado, Rio Grande do Sul, Brazil
| | - Lilian Raquel Hickert
- Life and Environmental Area, State University of Rio Grande do Sul, Encantado, Rio Grande do Sul, Brazil
| | | | - Marco Antônio Zachia Ayub
- Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Roger Wagner
- Department of Food Technology and Science, Federal University of Santa Maria, Camobi, Santa Maria, RS, Brazil
| | - Karla Joseane Perez
- Life and Environmental Area, State University of Rio Grande do Sul, Encantado, Rio Grande do Sul, Brazil
| | - Voltaire Sant'Anna
- Life and Environmental Area, State University of Rio Grande do Sul, Encantado, Rio Grande do Sul, Brazil.
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Araújo AB, Furlan JM, Salton GD, Schmalfuss T, Röhsig LM, Silla LMR, Passos EP, Paz AH. Isolation of human mesenchymal stem cells from amnion, chorion, placental decidua and umbilical cord: comparison of four enzymatic protocols. Biotechnol Lett 2018; 40:989-998. [PMID: 29619744 DOI: 10.1007/s10529-018-2546-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 03/27/2018] [Indexed: 01/02/2023]
Abstract
OBJECTIVE To compare four enzymatic protocols for mesenchymal stem cells (MSCs) isolation from amniotic (A-MSC) and chorionic (C-MSC) membranes, umbilical cord (UC-MSC) and placental decidua (D-MSC) in order to define a robust, practical and low-cost protocol for each tissue. RESULTS A-MSCs and UC-MSCs could be isolated from all samples using trypsin/collagenase-based protocols; C-MSCs could be isolated from all samples with collagenase- and trypsin/collagenase-based protocols; D-MSCs were isolated from all samples exclusively with a collagenase-based protocol. CONCLUSIONS The trypsin-only protocol was least efficient; the collagenase-only protocol was best for C-MSCs and D-MSCs; the combination of trypsin and collagenase was best for UC-MSCs and none of tested protocols was adequate for A-MSCs isolation.
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Affiliation(s)
- A B Araújo
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil. .,Federal University of Rio Grande do Sul, Porto Alegre, Brazil. .,Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil.
| | - J M Furlan
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - G D Salton
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - T Schmalfuss
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - L M Röhsig
- Cryobiology Unit and Umbilical Cord Blood Bank, Hemotherapy Service, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - L M R Silla
- Cellular Technology and Therapy Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - E P Passos
- Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
| | - A H Paz
- Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Hospital de Clínicas de Porto Alegre, Ramiro Barcelos, 2350, 90035-903, Porto Alegre, Rio Grande do Sul, Brazil
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