Wydawnictwo Uniwersytetu Przyrodniczego w Poznaniu

Biblioteka Uniwersytetu Przyrodniczego w Poznaniu

Nauka Przyroda Technologie

Thomson Routers Master List

Scopus

Ebsco

Directory of Open Acces Journals

CBR- Open Access Journals in Poland

FOOD SCIENCE CENTRAL

Index Copernicus Journal Master List

Pubmed Medline

Polska Bibliografia Naukowa

Creaive Commons

Creative Commons licence CC BY-NC (Attribution-NonCommercial)
Issue 6 (2) 2007 pp. 49-54

Dorota Walkowiak-Tomczak

Agricultural University of Poznan

Changes in antioxidant activity of black chokeberry juice concentrate solutions during storage

Abstract The aim of the study was to determine the effect of pasteurization and storage conditions of black chokeberry juice concentrate solutions on their antioxidant activity. The study investigated the effect of solution pH (3-5), temperature (10-30°C) and storage time (0-20 days), as well as oxygen availability. Solutions were obtained by diluting concentrate with buffers according to McIlvaine to anthocyanin contents of 20 mg%. They were next pasteurized and stored in the dark under conditions specified in the experimental design. Antioxidant activity was determined colorimetrically using the cation-radical of 2’2-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS). Antioxidant activity decreased in all samples, both after pasteurization and after storage. The biggest effect on the lowering of antioxidant activity was found for oxygen availability rate during pasteurization and storage, and for storage temperature.
Keywords: antioxidant activity, black chokeberry juice, storage, ABTS cation-radical
pub/.pdf Full text available in english in Adobe Acrobat format:
http://www.food.actapol.net/issue2/volume/5_2_2007.pdf

For citation:

MLA Walkowiak-Tomczak, Dorota. "Changes in antioxidant activity of black chokeberry juice concentrate solutions during storage." Acta Sci.Pol. Technol. Aliment. 6.2 (2007): 49-54.
APA Walkowiak-Tomczak D. (2007). Changes in antioxidant activity of black chokeberry juice concentrate solutions during storage. Acta Sci.Pol. Technol. Aliment. 6 (2), 49-54
ISO 690 WALKOWIAK-TOMCZAK, Dorota. Changes in antioxidant activity of black chokeberry juice concentrate solutions during storage. Acta Sci.Pol. Technol. Aliment., 2007, 6.2: 49-54.