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The Effect of Ultraviolet Light Treatment in Extend Shelf Life and Preserve<br />

the Quality of Strawberry<br />

Khor Sen Chou<br />

Supervisor: Dr. Nor Idzwana Mohd Idris<br />

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

School of Food Science and Technology<br />

Strawberry (Fragaria x ananassa) is a highly perishable product and rarely to keep for<br />

7 days. Ultraviolet light treatment proved to be effective in inhibit microbial loads and<br />

delay ripening process of fruit products where short wavelength (254 nm) ultraviolet-<br />

C was proved in keeping the freshness of fruits. The experiment is conducted to<br />

determine the effect of UV-C irradiation on extending shelf life and postharvest quality<br />

of strawberry. 399 of strawberries in maturity stage of 85-90% were exposed to<br />

different doses (0, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 kJ/m 2 ) of ultraviolet-C radiation.<br />

Treated strawberries randomly stored in the dark chilling room at -5Cº for 9 days. UV-<br />

C treated strawberries with the highest doses (1.0 kJ/mº) are significantly firmer<br />

(0.557N), higher total soluble solids content (7.5 ºBrix) and ascorbic acid<br />

concentration (0.518mg/ml) on day 9 (p

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