Abstract
The present work is aimed at the production of dietary fiber from underutilized coconut residue left after the extraction of milk, by subjecting it to physical treatments such as water washing, hot water washing, boiling water washing and pressure cooking, as well as solvent extraction. The fat content was reduced from 62% to 45% and 41% by treatment with boiling water and pressure-cooking, respectively. Water-holding, water retention and swelling capacities increased with decreasing fat content. A marked increase was observed in hydration properties when the fat content decreased from 10 to 2%. The hydration properties were maximum for 550 μm particle size coconut fiber. For the higher particle size (1,127 μm), the oil was trapped inside the fiber matrix, resulting in decreased hydration properties, whereas for the lower particle size (390 μm) the rupture of the fiber matrix was responsible for low hydration properties. An attempt was made to compare the hydration properties of coconut dietary fiber with other commercially available dietary fibers.
Similar content being viewed by others
References
Spiller GA (2000) CRC Hand book of dietary fiber in human nutrition. CRC, New York, pp 9–10
Wolthuis MS, Albers HFF, Jeveren JGC, Jong JW, Hautvast JGAJ, Hermus RJJ, Katan MB, Brydon WG, Eastwood MA (1980) Am J Clin Nutr 33:1745–1756
Roehrig KL (1988) Food Hydrocolloids 2:1-18
Trinidad TP, Valdez D, Mallillin AC, Askali FC, Maglaya AS, Chua MT, Castillo JC, Loyola AS, Masa DB (2001) Indian Coconut J 7:45–50
Mongeau R, Brassard R (1982) Am Assoc Cereal Chem 59:413–317
Larrauri JA (1999) Trends Food Sci Technol 10:3–8
Robertson JA, Monredon FD, Dysseler P, Guillon F, Amado R, Thibault JF (2000) Lebensm WissTechnol 33:72–79
Thebaudin JY, Lefebvre AC, Harrington M, Bourgeois CM (1997) Trends Food Sci Technol 8:41–48
Cadden AM (1987) J Food Sci 52:1595–1599
AOAC (1990) Methods of the Association of Official Analytical Chemists, vol. II, 15th edn. AOAC, Arlington, Virginia, USA, method No 920.85, p 780
Asp NG, Johansson CG, Hallmer H, Siljestrom M (1983) J Agric Food Chem 31:476–482
Auffret A, Ralet MC, Guillon F, Barry JL, Thibault JF (1994) Lebensm Wiss Technol 27:166–172
Lee SC, Prosky L, Vries JW (1992) J Assoc Anal Chem 75:3
Schweizer TF, Wursch P (1979) J Food Agric 30:613–619
Caprez A, Arrigoni E, Amado R, Neukom H (1986) J Cereal Sci 4:233–239
Acknowledgements
Authors are thankful to Dr. V. Prakash, Director, Central Food Technological Research Institute, Mysore, for his constant encouragement. Thanks are also due to Coconut Development Board. Kochi, India, for their keen interest as well as for financial support.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Raghavendra, S.N., Rastogi, N.K., Raghavarao, K.S.M.S. et al. Dietary fiber from coconut residue: effects of different treatments and particle size on the hydration properties. Eur Food Res Technol 218, 563–567 (2004). https://doi.org/10.1007/s00217-004-0889-2
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00217-004-0889-2