| Title: | Volatile metabolites produced from agro-industrial wastes by Na-alginate entrapped Kluyveromyces marxianus |
| Author(s): | Guneser O; Karagul-Yuceer Y; Wilkowska A; Kregiel D; |
| Address: | "Usak University, Engineering Faculty, Department of Food Engineering, 1 Eylul Campus, Usak, Turkey. Electronic address: onur.guneser@usak.edu.tr. Canakkale Onsekiz Mart University, Engineering Faculty, Department of Food Engineering, Canakkale, Turkey. Lodz University of Technology, Institute of Fermentation Technology and Microbiology, Lodz, Poland" |
| DOI: | 10.1016/j.bjm.2016.07.018 |
| ISSN/ISBN: | 1678-4405 (Electronic) 1517-8382 (Print) 1517-8382 (Linking) |
| Abstract: | "The aim of this study was to evaluate the effects of alginate entrapment on fermentation metabolites of Kluyveromyces marxianus grown in agrowastes that served as the liquid culture media. K. marxianus cells entrapped in Na-alginate were prepared using the traditional liquid-droplet-forming method. Whey and pomaces from processed tomatoes, peppers, and grapes were used as the culture media. The changes in the concentrations of sugar, alcohol, organic acids, and flavor compounds were analyzed using gas chromatography-mass spectrometry (GC-MS) and high pressure liquid chromatography (HPLC). Both free and entrapped, K. marxianus were used individually to metabolize sugars, organic acids, alcohols, and flavor compounds in the tomato, pepper, grape, and acid whey based media. Marked changes in the fermentation behaviors of entrapped and free K. marxianus were observed in each culture. A 1.45-log increase was observed in the cell numbers of free K. marxianus during fermentation. On the contrary, the cell numbers of entrapped K. marxianus remained the same. Both free and entrapped K. marxianus brought about the fermentation of sugars such as glucose, fructose, and lactose in the agrowaste cultures. The highest volume of ethanol was produced by K. marxianus in the whey based media. The concentrations of flavor compounds such as ethyl acetate, isoamyl alcohol, isoamyl acetate, 2-phenylethyl isobutyrate, phenylethyl acetate, and phenylethyl alcohol were higher in fermented agrowaste based media compared to the control" |
| Keywords: | "Alginates/*metabolism Biodegradation, Environmental *Fermentation Glucuronic Acid/metabolism Hexuronic Acids/metabolism Industrial Waste Kluyveromyces/*metabolism Volatile Organic Compounds/*metabolism *Waste Products Agrowastes Encapsulation Foamed algin;" |
| Notes: | "MedlineGuneser, Onur Karagul-Yuceer, Yonca Wilkowska, Agnieszka Kregiel, Dorota eng Brazil 2016/08/16 Braz J Microbiol. 2016 Oct-Dec; 47(4):965-972. doi: 10.1016/j.bjm.2016.07.018. Epub 2016 Jul 28" |
