During espresso coffee preparation large amounts of spent coffee residues are produced and discarded daily as a part of the communal waste. However, there is a great potential in recycling this type of waste for extraction of natural antioxidants and manufacture of dietary supplements. The aim of this study was to investigate the effect of fermentation on the antioxidant properties of spent coffee extracts. Six series of spent espresso-type coffee samples were inoculated with selected natural strains of Streptomyces sp. The solid state-fermentation was carried out at 30°C five days. Aqueous extracts have been prepared and evaporated in the spray-dryer. The total polyphenol content was determined by Folin-Ciocalteu method and the antioxidant activity by two methods: inhibition DPPH (2,2-diphenyil-1-picrylhidrazyl) radicals and FRAP (Ferric Reducing Antioxidant Power). Inhibition of DPPH radicals was expressed as IC50 value. Results were compared to those of nonfermented control sample. ...Fermentation of spent coffee with these cultures have resulted in increased contents of polyphenols. Also, both methods have confirmed increased antioxidative activity in certain samples depending on the selected strains. It was therefore concluded that fermentation of spent coffee with Streptomyces sp. cultures have improved its antioxidative properties which presents a potential for its application in pharmaceutical and food industry.
TY - CONF
AU - Mihajlovski, Katarina
AU - Pavlović, Marija D.
AU - Milutinović, Milica
AU - Šiler-Marinković, Slavica
AU - Dimitrijević-Branković, Suzana
PY - 2012
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1989
AB - During espresso coffee preparation large amounts of spent coffee residues are produced and discarded daily as a part of the communal waste. However, there is a great potential in recycling this type of waste for extraction of natural antioxidants and manufacture of dietary supplements. The aim of this study was to investigate the effect of fermentation on the antioxidant properties of spent coffee extracts. Six series of spent espresso-type coffee samples were inoculated with selected natural strains of Streptomyces sp. The solid state-fermentation was carried out at 30°C five days. Aqueous extracts have been prepared and evaporated in the spray-dryer. The total polyphenol content was determined by Folin-Ciocalteu method and the antioxidant activity by two methods: inhibition DPPH (2,2-diphenyil-1-picrylhidrazyl) radicals and FRAP (Ferric Reducing Antioxidant Power). Inhibition of DPPH radicals was expressed as IC50 value. Results were compared to those of nonfermented control sample. Fermentation of spent coffee with these cultures have resulted in increased contents of polyphenols. Also, both methods have confirmed increased antioxidative activity in certain samples depending on the selected strains. It was therefore concluded that fermentation of spent coffee with Streptomyces sp. cultures have improved its antioxidative properties which presents a potential for its application in pharmaceutical and food industry.
PB - 6th Central European Congress on Food, CEFood 2012
C3 - CEFood 2012 - Proceedings of 6th Central European Congress on Food
T1 - Effect of fermentation by Streptomyces sp. on antioxidant properties of spent coffee extracts
EP - 1039
SP - 1035
UR - https://hdl.handle.net/21.15107/rcub_technorep_1989
ER -
@conference{
author = "Mihajlovski, Katarina and Pavlović, Marija D. and Milutinović, Milica and Šiler-Marinković, Slavica and Dimitrijević-Branković, Suzana",
year = "2012",
abstract = "During espresso coffee preparation large amounts of spent coffee residues are produced and discarded daily as a part of the communal waste. However, there is a great potential in recycling this type of waste for extraction of natural antioxidants and manufacture of dietary supplements. The aim of this study was to investigate the effect of fermentation on the antioxidant properties of spent coffee extracts. Six series of spent espresso-type coffee samples were inoculated with selected natural strains of Streptomyces sp. The solid state-fermentation was carried out at 30°C five days. Aqueous extracts have been prepared and evaporated in the spray-dryer. The total polyphenol content was determined by Folin-Ciocalteu method and the antioxidant activity by two methods: inhibition DPPH (2,2-diphenyil-1-picrylhidrazyl) radicals and FRAP (Ferric Reducing Antioxidant Power). Inhibition of DPPH radicals was expressed as IC50 value. Results were compared to those of nonfermented control sample. Fermentation of spent coffee with these cultures have resulted in increased contents of polyphenols. Also, both methods have confirmed increased antioxidative activity in certain samples depending on the selected strains. It was therefore concluded that fermentation of spent coffee with Streptomyces sp. cultures have improved its antioxidative properties which presents a potential for its application in pharmaceutical and food industry.",
publisher = "6th Central European Congress on Food, CEFood 2012",
journal = "CEFood 2012 - Proceedings of 6th Central European Congress on Food",
title = "Effect of fermentation by Streptomyces sp. on antioxidant properties of spent coffee extracts",
pages = "1039-1035",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1989"
}
Mihajlovski, K., Pavlović, M. D., Milutinović, M., Šiler-Marinković, S.,& Dimitrijević-Branković, S.. (2012). Effect of fermentation by Streptomyces sp. on antioxidant properties of spent coffee extracts. in CEFood 2012 - Proceedings of 6th Central European Congress on Food
6th Central European Congress on Food, CEFood 2012., 1035-1039.
https://hdl.handle.net/21.15107/rcub_technorep_1989
Mihajlovski K, Pavlović MD, Milutinović M, Šiler-Marinković S, Dimitrijević-Branković S. Effect of fermentation by Streptomyces sp. on antioxidant properties of spent coffee extracts. in CEFood 2012 - Proceedings of 6th Central European Congress on Food. 2012;:1035-1039.
https://hdl.handle.net/21.15107/rcub_technorep_1989 .
Mihajlovski, Katarina, Pavlović, Marija D., Milutinović, Milica, Šiler-Marinković, Slavica, Dimitrijević-Branković, Suzana, "Effect of fermentation by Streptomyces sp. on antioxidant properties of spent coffee extracts" in CEFood 2012 - Proceedings of 6th Central European Congress on Food (2012):1035-1039,
https://hdl.handle.net/21.15107/rcub_technorep_1989 .
