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Effect of Maltodextrin and Whey Protein Concentrate on Antioxidant<br />

Properties of Cosmos caudatus (Ulam Raja) Powder and its Application in<br />

Yogurt<br />

Suhaila Azuar Binti Suhimi<br />

Supervisor: Dr. Nizaha Juhaida Binti Mohamad<br />

Bachelor of Food Science (Food Technology)<br />

School of Food Science and Technology<br />

Previous study showed that combination of maltodextrin (MD) and whey protein<br />

concentrate (WPC) at 25:75 ratio increased oxidative stability during spray-drying.<br />

However, no study has been carried out at different ratio of combination on the<br />

antioxidant properties of Cosmos caudatus (CC). Therefore, this study aims to see the<br />

effect of MD and WPC at different ratios on the antioxidant properties of CC powder (CCP)<br />

and the effect of CCP on the physicochemical properties and sensory acceptance of<br />

yogurt. The carrier will be mixed at 0MD:100WPC, 25MD:75WPC, 50MD:50WPC,<br />

75MD:25WPC and 100MD:0WPC. The carrier mixture will be mixed with the CC extract<br />

(1:1 of water:CC leaves) at 10% (w/v) before proceeding to spray-drying. The CCP then<br />

will be added at 10% (w/w) from the total weight of yogurt. The combination of MD and<br />

WPC will significantly preserve the antioxidant properties of CCP compared to the effect<br />

of carrier individually.<br />

1298 | UMT UNDERGRADUATE RESEARCH DAY

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