Pineapple core dietary fiber (PDF) was obtained by alcoholic extraction; pineapple core cellulose (PC) was a
product of alkali extraction with a bleaching process. Total dietary fiber content of PDF and PC was 99.8% and
95.2% (dry basis), respectively, and their water activity was 0.25. PC contained 91.2% cellulose with a pH value of 4.0,
while that of PDF was 6.2. The fiber product with large particle size gave higher values than the product with smaller
particles for pH, water and oil retention capacity, settling volume and emulsifying activity. Both had rough, pitted
surfaces and presented showed good functions in cake-type doughnuts, golden layer cake and beef burgers.
Keywords: dietary fiber, cellulose, pineapple core, extraction, functional properties
Pineapple core dietary fiber (PDF) was obtained by alcoholic extraction; pineapple core cellulose (PC) was aproduct of alkali extraction with a bleaching process. Total dietary fiber content of PDF and PC was 99.8% and95.2% (dry basis), respectively, and their water activity was 0.25. PC contained 91.2% cellulose with a pH value of 4.0,while that of PDF was 6.2. The fiber product with large particle size gave higher values than the product with smallerparticles for pH, water and oil retention capacity, settling volume and emulsifying activity. Both had rough, pittedsurfaces and presented showed good functions in cake-type doughnuts, golden layer cake and beef burgers.Keywords: dietary fiber, cellulose, pineapple core, extraction, functional properties
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