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A study of pectolytic enzymes and a cellulase in the application of colour extraction from bilberry mash
2004 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

It has been shown that blueberries and bilberries ("European Blueberries") have a lot of health beneficial properties and that many of these effects can be attributed to the anthocyanins, the pigments of the berries. Compared to many other fruit and vegetables bilberries contain a lot of these pigments. Clinical studies have shown that bilberries are effective in the treatment of circulation disorders. It has also been shown that the anthocyanins have anti-inflammatory activity and the ability to strengthen veins and arteries. In vitro studies also suggest that the anthocyanins might have anti-cancer activity. The purpose of this study was to find out wheather a selection of pectolytic enzymes and a cellulase would give significnatly increased colour extraction (anthocyanin extraction) from bilberry mash and in that way creat a high quality starting material for a health drink based on bilberry anthocyanins. Three pectolytical enzymes and a cellulase were tested under various temperatures and pH values. It was found that the pectolytical enzymes significantly(p=0.05) increased colour extraction at natural pH value of the bilberry mash, but that the cellulase did not. Combinations of the pectolytical enzymes with the cellulase did not give better colour extractions compared to extractions where the pectolytical enzymes were used alone. It was concluded that the use of pectolytical enzymes would give better colour extraction and better processability of the bilberry mash. This would in turn give better process economy in the production of a bilberry based health drink.

Place, publisher, year, edition, pages
Keyword [en]
Physics Chemistry Maths, Anthocyanin, berry processing, bilberry, cellulase, colour, extraction, health drink, pectin, pectolytic enzymes
Keyword [sv]
Fysik, Kemi, Matematik
URN: urn:nbn:se:ltu:diva-57838ISRN: LTU-DUPP--04/26--SELocal ID: e753d2d8-44cb-4144-b84a-8b3f0594bf4aOAI: diva2:1031226
Subject / course
Student thesis, at least 15 credits
Educational program
Chemical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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