Antioxidant activity of beer produced with unmalted quinoa and amaranth additives
Journal Title: Żywność. Nauka. Technologia. Jakość - Year 2016, Vol 23, Issue 3
Abstract
The objective of the research study was to assess the antioxidant activity of beers produced using unmalted quinoa (seeds or flakes) or amaranth (seeds, flakes, or popped seeds) as substitutes for 10 and 30% of malt from barley. The antioxidant activity of the beers studied was determined based on the effectiveness of quenching a synthetic DPPH˙+ radical and the ability to reduce ferric ion by a FRAP method. Under the research studies conducted, the content of polyphenols was also determined by a spectrophotometric method. The reducing ability of beers produced with added 10 % of unmalted amaranth seeds or flakes was higher compared to the beers manufactured solely from barley malt. Compared to the beers manufactured wholly from malt, the antiradical activity of beers did not decreased where any form of quinea was used to substitute the amount of 10 % of malt. The application of unmalted polyphenols-rich pseudocereals as a substitute for malt did not cause the content of those compounds in the final beer to increase. In the case the amaranth or quinoa seeds substituted 30 % of the barley malt, it was found that the reducing potential of the produced beers significantly decreased compared to beers produced with 10% of pseudocereals added and to beers produced exclusively from barley malt. The completed research study has not given a clear-cut answer whether or not the quinea or amaranth cause the antioxidant activity of beers produced with them to increase, and, consequently, the shelf life of those beers to become longer. More research on this subject is indispensable including, among other things, the analysis of fatty acids added to beer along with pseudocereals.
Authors and Affiliations
Paulina Bogdan, Edyta Kordialik-Bogacka
Keywords
Related Articles
- EP ID EP96377
- DOI 10.15193/zntj/2016/106/130
- Views 64
- Downloads 0
Charakterystyka fizykochemiczna podrobów wieprzowych uzyskanych z tuczników o zróżnicowanym genotypie RYR1
Wydajność rzeźna i jakość mięsa tusz buhajków zakwalifikowanych w systemie EUROP do różnych klas uformowania
Badania przeprowadzono na 167 tuszach buhajków rasy polskiej holsztyńsko-fryzyjskiej (phf), które od masy 70 ÷100 kg opasano intensywnie z dużym udziałem pasz treściwych oraz z dodatkiem siana lub słomy. Ubój przeprowa...
Zastosowanie metody HS-SPME_GC/FID do wykrywania wczesnych zmian oksydacyjnych oleju lnianego
Celem pracy była ocena możliwości wykorzystania mikroekstrakcji z fazy nadpowierzchniowej do fazy stacjonarnej (HS-SPME) i chromatografii gazowej z detekcją płomieniowo-jonizacyjną (GC/FID) do wykrywania wczesnych zmia...
Zastosowanie modeli matematycznych do opisu izoterm adsorpcji pary wodnej suszonej marchwi purpurowej i pomarańczowej
W pracy wyznaczono i opisano modelami matematycznymi: BET, GAB, Lewickiego, Oswina, Halsey'a i Pelega izotermy adsorpcji pary wodnej suszonej marchwi pomarańczowej i purpurowej. Marchew pomarańczową odmiany Bolero oraz...
EFFECCT OF ADDED OAT PRODUCTS ON BAKING CHARACTERISTICS OF RYE-OAT BLENDS
The objective of the research study performed was to assess the effect of oat flour, bran, and flakes on the baking value of rye-oat blends. The research material consisted of a commercial rye flour, type 720, oat flou...