Physicochemical, textural and viscoelastic properties of palm diacylglycerol bakery shortening during storage

Cheong, Ling-Zhi and Tan, Chin-Ping and Long, Kamariah and Yusoff, Mohd Suria Affandi and Lai, Oi-Ming (2010) Physicochemical, textural and viscoelastic properties of palm diacylglycerol bakery shortening during storage. Journal of the Science of Food and Agriculture, 90 (13). pp. 2310-2317. ISSN 0022-5142

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BACKGROUND: Diacylglycerol (DAG), which has health-enhancing properties, is sometimes added to bakery shortening to produce baked products with enhanced physical functionality. Nevertheless, the quantity present is often too little to exert any positive healthful effects. This research aimed to produce bakery shortenings containing significant amounts of palm diacyglycerol (PDG). Physicochemical, textural and viscoelastic properties of the PDG bakery shortenings during 3 months storage were evaluated and compared with those of commercial bakery shortening (CS). RESULTS: PDG bakery shortenings (DS55, DS64 and DS73) had less significant increments in slip melting point (SMP), solid fat content (SFC) and hardness during storage as compared to CS. Unlike CS, melting behaviour and viscoelastic properties of PDG bakery shortenings remained unchanged during storage. As for polymorphic transformation, CS contained only β crystals after 8 weeks of storage. PDG bakery shortenings managed to retard polymorphic transformation for up to 10 weeks of storage in DS55 and 12 weeks of storage in DS64 and DS73. CONCLUSION: PDG bakery shortenings had similar if not better storage stability as compared to CS. This is mainly due to the ability of DAG to retard polymorphic transformation from β′ to β crystals. Thus, incorporation of DAG improved physical functionality of bakery shortening. Copyright © 2010 Society of Chemical Industry

Item Type:Article
Keyword:Palm diacylglycerol, Palm stearin, Bakery shortening, Physicochemical properties, Textural properties, Viscoelastic properties, Storage properties
Subject:Diglycerides - Properties
Subject:Oils and fats, Edible - Analysis
Subject:Oils and fats, Edible - Storage
Faculty or Institute:Faculty of Biotechnology and Biomolecular Sciences
DOI Number:10.1002/jsfa.4088
ID Code:17735
Deposited By: Nida Hidayati Ghazali
Deposited On:26 Aug 2011 04:12
Last Modified:26 Aug 2011 04:12

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