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Effect of LED Light Exposure in Delaying Browning Incidence and<br />

Maintaining Postharvest Quality of Fresh-Cut Pineapple (Ananas Comosus<br />

L.) Stored at Two Storage Temperatures<br />

Ng Wan Jing<br />

Supervisor: Dr. Wan Zaliha Wan Sembok<br />

Bachelor of Science Agrotechnology (Postharvest Technology)<br />

School of Food Science and Technology<br />

Fresh-cut pineapple characterized by shorter shelf life due to enzymatic browning<br />

which catalyzed by polyphenol oxidase (PPO). Browning incidence (BI) affects the<br />

postharvest quality and also limits the shelf life of fresh-cut pineapple. In present<br />

study, the effects of LED lights (white, blue, red) on fresh cut pineapple were<br />

evaluated under two storage temperatures (5˚C and 10˚C) for 18 days. The<br />

parameters being evaluated were browning index, color, percentage weight loss,<br />

firmness, soluble solids concentration, total phenolic content and ascorbic acid.<br />

Interestingly, LED light (470nm) at 5˚C had significant effect (p≤0.05) in reducing BI<br />

of fresh cut pineapple. In conclusion, fresh cut pineapples treated with blue LED light<br />

and further stored at 5˚C has a tendency in delaying BI without adversely affecting<br />

other quality attributes.<br />

1043 | UMT UNDERGRADUATE RESEARCH DAY 2018

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