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Xie J, Zhao Z, Gänzle MG. Contribution of γ-Glutamyl-Cysteine Ligases of Limosilactobacillus reuteri to the Formation of Kokumi-Active γ-Glutamyl Dipeptides in Sourdough Bread. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:5935-5943. [PMID: 38469860 DOI: 10.1021/acs.jafc.3c09707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Kokumi-active γ-glutamyl dipeptides accumulate during sourdough fermentation. γ-Glutamylcysteine ligases (Gcls) of Limosilactobacillus reuteri synthesize γ-glutamyl dipeptides during growth in sourdough. This study aimed to evaluate the contribution of Gcls from strains of L. reuteri in the formation of kokumi-active γ-glutamyl dipeptides in sourdough bread. Among 12 acceptor amino acids, the three Gcls of L. reuteri were the most active to Cys. With the acceptor amino acids Ile, Leu, and Phe, Gcl1 was more active than Gcl2 and Gcl3. Accordingly, Gcl1 contributed to the γ-Glu-Ile synthesis in sourdough fermentation. Proofing and baking strongly influenced the concentration of γ-glutamyl dipeptides in bread. The addition of 10% sourdough increased the content of γ-Glu-Leu and γ-Glu-Phe but not of other γ-glutamyl dipeptides in bread. In conclusion, the accumulation of kokumi γ-glutamyl dipeptides in sourdoughs was attributed to the combined activity of cereal enzymes, γ-glutamyl-cysteine ligases, and other microbial enzymes.
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Affiliation(s)
- Jin Xie
- Dept. of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton T6G 2P5, Canada
| | - Ziyi Zhao
- Dept. of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton T6G 2P5, Canada
| | - Michael G Gänzle
- Dept. of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton T6G 2P5, Canada
- College of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, Hubei, People's Republic of China
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Gänzle MG, Qiao N, Bechtner J. The quest for the perfect loaf of sourdough bread continues: Novel developments for selection of sourdough starter cultures. Int J Food Microbiol 2023; 407:110421. [PMID: 37806010 DOI: 10.1016/j.ijfoodmicro.2023.110421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 08/17/2023] [Accepted: 09/26/2023] [Indexed: 10/10/2023]
Abstract
Sourdough fermentation, one of the oldest unit operations in food production, is currently experiencing a revival in bread production at the household, artisanal, and the industrial level. The expanding use of sourdough fermentation in bread production and the adaptation of fermentation to large scale industrial bread production also necessitate the development of novel starter cultures. Developments in the last years also have expanded the tools that are used to assess the metabolic potential of specific strains, species or genera of the Lactobacillaceae and have identified multiple ecological and metabolic traits as clade-specific. This review aims to provide an overview on the clade-specific metabolic potential of members of the Lactobacillaceae for use in sourdough baking, and the impact of these clade-specific traits on bread quality. Emphasis is placed on carbohydrate metabolism, including the conversion of sucrose and starch to soluble polysaccharides, conversion of amino acids, and the metabolism of organic acids. The current state of knowledge to compose multi-strain starter cultures (synthetic microbial communities) that are suitable for back-slopping will also be discussed. Taken together, the communication outlines the current tools for selection of microbes for use in sourdough baking.
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Affiliation(s)
- Michael G Gänzle
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada.
| | - Nanzhen Qiao
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada
| | - Julia Bechtner
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada
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D’Amico V, Gänzle M, Call L, Zwirzitz B, Grausgruber H, D’Amico S, Brouns F. Does sourdough bread provide clinically relevant health benefits? Front Nutr 2023; 10:1230043. [PMID: 37545587 PMCID: PMC10399781 DOI: 10.3389/fnut.2023.1230043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 06/27/2023] [Indexed: 08/08/2023] Open
Abstract
During the last decade, scientific interest in and consumer attention to sourdough fermentation in bread making has increased. On the one hand, this technology may favorably impact product quality, including flavor and shelf-life of bakery products; on the other hand, some cereal components, especially in wheat and rye, which are known to cause adverse reactions in a small subset of the population, can be partially modified or degraded. The latter potentially reduces their harmful effects, but depends strongly on the composition of sourdough microbiota, processing conditions and the resulting acidification. Tolerability, nutritional composition, potential health effects and consumer acceptance of sourdough bread are often suggested to be superior compared to yeast-leavened bread. However, the advantages of sourdough fermentation claimed in many publications rely mostly on data from chemical and in vitro analyzes, which raises questions about the actual impact on human nutrition. This review focuses on grain components, which may cause adverse effects in humans and the effect of sourdough microbiota on their structure, quantity and biological properties. Furthermore, presumed benefits of secondary metabolites and reduction of contaminants are discussed. The benefits claimed deriving from in vitro and in vivo experiments will be evaluated across a broader spectrum in terms of clinically relevant effects on human health. Accordingly, this critical review aims to contribute to a better understanding of the extent to which sourdough bread may result in measurable health benefits in humans.
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Affiliation(s)
- Vera D’Amico
- Department of Food Science and Technology, BOKU–University of Natural Resources and Life Sciences, Vienna, Austria
| | - Michael Gänzle
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada
| | - Lisa Call
- Department of Crop Sciences, BOKU–University of Natural Resources and Life Sciences, Tulln, Austria
| | - Benjamin Zwirzitz
- Department of Food Science and Technology, BOKU–University of Natural Resources and Life Sciences, Vienna, Austria
| | - Heinrich Grausgruber
- Department of Crop Sciences, BOKU–University of Natural Resources and Life Sciences, Tulln, Austria
| | - Stefano D’Amico
- Institute for Animal Nutrition and Feed, AGES–Austrian Agency for Health and Food Safety, Vienna, Austria
| | - Fred Brouns
- Department of Human Biology, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, Netherlands
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Atudorei D, Mironeasa S, Codină GG. Dough Rheological Behavior and Bread Quality as Affected by Addition of Soybean Flour in a Germinated Form. Foods 2023; 12:foods12061316. [PMID: 36981241 PMCID: PMC10048470 DOI: 10.3390/foods12061316] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 03/30/2023] Open
Abstract
This study analyzes the possibility of using soybeans as an addition to the main ingredients used to make bread, with the aim of improving its quality characteristics. To maximize the nutritional profile of soybeans they were subjected to the germination and lyophilization process before being used in bread making. The addition levels of 5%, 10%, 15%, and 20% germinated soybean flour (GSF) on dough rheology and bread quality were used. From the rheology point of view, the GSF addition had the effect of decreasing the values of the creep and recovery parameters: JCo, JCm, μCo, Jmax, JRo, JRm, and Jr. At the same time, the rheological parameters λC and λR increased. The GSF addition did not affect dough homogeneity as may be seen from EFLM analysis. Regarding the quality of the bread, it may be concluded that a maximum of 15% GSF addition in wheat flour had a desirable effect on loaf volume, porosity, elasticity, and sensory properties of the bread. The bread samples with GSF additions showed a higher brightness and a less pronounced red and yellow tint. When the percentage of GSF in wheat flour increased, the value of the firmness parameter increased and the value of the gumminess, cohesiveness, and resilience parameters decreased. The addition of GSF had a desirable influence on the crumb structure of the bread samples. Thus, taking into account the results of the determinations outlined above, it can be stated that GSF addition in wheat flour leads to bread samples with good quality characteristics.
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Affiliation(s)
- Denisa Atudorei
- Faculty of Food Engineering, Stefan cel Mare University of Suceava, 720229 Suceava, Romania
| | - Silvia Mironeasa
- Faculty of Food Engineering, Stefan cel Mare University of Suceava, 720229 Suceava, Romania
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Klupsaite D, Starkute V, Zokaityte E, Cernauskas D, Mockus E, Kentra E, Sliazaite R, Abramaviciute G, Sakaite P, Komarova V, Tatarunaite I, Radziune S, Gliaubiciute P, Zimkaite M, Kunce J, Avizienyte S, Povilaityte M, Sokolova K, Rocha JM, Özogul F, Bartkiene E. The Contribution of Scalded and Scalded-Fermented Rye Wholemeal Flour to Quality Parameters and Acrylamide Formation in Semi-Wheat-Rye Bread. Foods 2023; 12:foods12050937. [PMID: 36900454 PMCID: PMC10000374 DOI: 10.3390/foods12050937] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/07/2023] [Accepted: 02/15/2023] [Indexed: 02/25/2023] Open
Abstract
The aim of this study was to evaluate the influence of scalded (Sc) and scalded-fermented (FSc) (with Lactiplantibacillus paracasei No. 244 strain) rye wholemeal flour on the quality parameters and acrylamide formation in semi-wheat-rye bread. To that purpose, 5, 10 and 15% of Sc and FSc were used for bread production. Results showed that scalding increased fructose, glucose and maltose content in rye wholemeal. Lower concentrations of free amino acids were found in Sc when compared with rye wholemeal, but fermentation of Sc increased the concentrations of some amino acids (on average by 1.51 times), including gamma aminobutyric acid (GABA, by 1.47 times). Addition of Sc and FSc had a significant influence (p ≤ 0.05) on bread shape coefficient, mass loss after baking and most bread colour coordinates. Most of the breads with Sc or FSc showed lower hardness after 72 h of storage compared with the control (i.e., without Sc or FSc). FSc improved bread colour and flavour, as well as overall acceptability. Breads with 5 and 10% of Sc had a similar level of acrylamide to the control, while its level in breads with FSc was higher (on average, 236.3 µg/kg). Finally, different types and amounts of scald had varying effects on the quality of the semi-wheat-rye bread. FSc delayed staling and improved sensory properties and acceptability, as well as the GABA level of wheat-rye bread, while the same level of acrylamide as was seen in control bread could be reached when using between 5 and 10% of scalded rye wholemeal flour.
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Affiliation(s)
- Dovile Klupsaite
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Vytaute Starkute
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Egle Zokaityte
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Darius Cernauskas
- Food Institute, Kaunas University of Technology, Radvilenu Road 19, LT-50254 Kaunas, Lithuania
| | - Ernestas Mockus
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Evaldas Kentra
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Rugilė Sliazaite
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Gabriele Abramaviciute
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Paulina Sakaite
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Vitalija Komarova
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Ieva Tatarunaite
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Sandra Radziune
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Paulina Gliaubiciute
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Monika Zimkaite
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Julius Kunce
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Sarune Avizienyte
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Milena Povilaityte
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Kotryna Sokolova
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - João Miguel Rocha
- Laboratory for Process Engineering, Environment, Biotechnology and Energy (LEPABE), Faculty of Engineering, University of Porto (FEUP), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- Associate Laboratory in Chemical Engineering (ALiCE), Faculty of Engineering, University of Porto (FEUP), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Fatih Özogul
- Department of Seafood Processing Technology, Faculty of Fisheries, Cukurova University, Balcali, Adana 01330, Turkey
- Biotechnology Research and Application Center, Cukurova University, Balcali, Adana 01330, Turkey
| | - Elena Bartkiene
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Correspondence: ; Tel.: +37-060135837
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Knowledge of fermentation dynamics allows for reducing sugar levels in yeast-leavened pastry. J Cereal Sci 2023. [DOI: 10.1016/j.jcs.2022.103601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wang F, Bi J, Lyu J, Wu X, Xie J. Effect of osmotic dehydration with different osmosis agents on water status, texture properties, sugars, and total carotenoid of dehydrated yellow peach slices. J Food Sci 2023; 88:109-118. [PMID: 36443941 DOI: 10.1111/1750-3841.16388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 07/11/2022] [Accepted: 10/28/2022] [Indexed: 11/30/2022]
Abstract
The water status, texture properties, sugars, and total carotenoid of dehydrated yellow peach slices pretreated with or without osmotic dehydration (OD) combined with heat pump drying were studied. In this study, different osmotic agents were used, namely, sucrose and isomaltooligosaccharide (IMO) with 30 °Brix for 1, 3, and 5 h. Results showed that the dehydrated samples pretreated by sucrose-OD with the best shape and cell structure showed lower hardness compared to the dehydrated yellow peach slices with IMO-OD pretreatment and without OD pretreatment. Notably, the highest total carotenoid content was found in dehydrated yellow peach slices pretreated by IMO-OD, followed by samples without OD, and samples with sucrose-OD pretreatment. In addition, the lowest aW (0.517) was obtained in samples with IMO-OD for 5 h, which was beneficial for storage. The assessment of water status and total carotenoid content of dehydrated yellow peach slices showed that IMO-OD pretreatment could better improve the quality of dehydrated fruits. Moreover, the use of IMO in OD treatment was a good alternative to sucrose.
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Affiliation(s)
- Fengzhao Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China.,College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Jinfeng Bi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Jian Lyu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Xinye Wu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Jin Xie
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS), Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
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Abstract
Functional lactic acid bacteria (LAB) as starter cultures used in sourdough fermentation have been researched for years. This study evaluated the LAB strains Leuconostoc citreum DCM65 (mannitol, exopolysaccharide producing, antifungal activity) and Lactiplantibacillus plantarum subsp. plantarum MA418 (amylolytic activity) and their potential as single or co-culture starters in sourdough fermented buns containing different levels of sugar (control 9% and reduced 0, 3, 6%). Cell counts, pH development, and organic acids were determined before and after sourdough fermentation (30 °C, 24 h) and physical properties (color, volume, pore structure, and texture) of buns produced thereof were determined after baking. Sourdoughs started with DCM65 and/or MA418 developed up to log 9.2 CFU/g presumptive LAB after 24 h, assertiveness of the added starter cultures species was confirmed by MALDI-TOF MS. Acetic acid and mannitol were only detected in sourdough fermented with DCM65 (single or co-culture) up to 2.5 mg/g and 9.8 mg/g, respectively. The starter cultures applied influenced physical properties of buns. Sourdough buns started with MA418 had higher volume and slice area, and softer crumb; in contrast, buns fermented with DCM65 had a finer pore structure. In summary, both starter cultures showed high potential in sourdough buns with reduced sugar content.
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Müller DC, Mischler S, Schönlechner R, Miescher Schwenninger S. Multiple Techno-Functional Characteristics of Leuconostoc and Their Potential in Sourdough Fermentations. Microorganisms 2021; 9:1633. [PMID: 34442711 PMCID: PMC8399619 DOI: 10.3390/microorganisms9081633] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/23/2021] [Accepted: 07/23/2021] [Indexed: 12/04/2022] Open
Abstract
In this study, the potential of Leuconostoc as non-conventional sourdough starter cultures was investigated. A screening for antifungal activities of 99 lactic acid bacteria (LAB) strains revealed high suppression of bakery-relevant moulds in nine strains of Leuconostoc with activities against Penicillium sp., Aspergillus sp., and Cladosporium sp. Mannitol production was determined in 49 Leuconostoc strains with >30 g/L mannitol in fructose (50 g/L)-enriched MRS. Further, exopolysaccharides (EPS) production was qualitatively determined on sucrose (40 g/L)-enriched MRS agar and revealed 59 EPS positive Leuconostoc strains that harboured dextransucrase genes, as confirmed by PCR. Four multifunctional Lc. citreum strains (DCM49, DCM65, MA079, and MA113) were finally applied in lab-scale sourdough fermentations (30 °C, 24 h). Lc. citreum was confirmed by MALDI-TOF MS up to 9 log CFU/g and pH dropped to 4.0 and TTA increased to 12.4. Antifungal compounds such as acetic acid, phenyllactic and hydroxyphenyllactic acids were determined up to 1.7 mg/g, 2.1 µg/g, and 1.3 µg/g, respectively, mannitol up to 8.6 mg/g, and EPS up to 0.62 g/100 g. Due to the observed multifunctionalities and the competitiveness in the natural flour microbiota present in sourdoughs, non-conventional LAB genera such as Leuconostoc seem promising for application in sourdough-based bakery products.
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Affiliation(s)
- Denise C. Müller
- Food Biotechnology Research Group, Institute of Food and Beverage Innovation, Zurich University of Applied Sciences (ZHAW), 8820 Wädenswil, Switzerland; (D.C.M.); (S.M.)
- Department of Food Science and Technology, University of Natural Resources and Life Sciences (BOKU), 1190 Vienna, Austria;
| | - Sandra Mischler
- Food Biotechnology Research Group, Institute of Food and Beverage Innovation, Zurich University of Applied Sciences (ZHAW), 8820 Wädenswil, Switzerland; (D.C.M.); (S.M.)
| | - Regine Schönlechner
- Department of Food Science and Technology, University of Natural Resources and Life Sciences (BOKU), 1190 Vienna, Austria;
| | - Susanne Miescher Schwenninger
- Food Biotechnology Research Group, Institute of Food and Beverage Innovation, Zurich University of Applied Sciences (ZHAW), 8820 Wädenswil, Switzerland; (D.C.M.); (S.M.)
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