บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effects of chitosan coating on postharvest life and quality of longan fruit.

Jiang YueMing; Li YueBiao;

Food Chemistry Year: 2001 Vol: 73 Issue: 2 Pages: 139-143 Ref: 23 ref.

2000

บทคัดย่อ

Effects of chitosan coating on postharvest life and quality of longan fruit.

A study was conducted to assess the potential of chitosan coating in extending postharvest life and maintaining quality of longan fruit during storage at low temperature. The fruits were treated with solutions of 0.5, 1.0 and 2.0% chitosan, respectively, and then stored at 2 deg C and 90% relative humidity. Changes in respiration rate, polyphenol oxidase (PPO) activity, colour, eating quality, weight loss, total soluble solids, titratable acidity and ascorbic acid were measured. The effect of chitosan coating on disease incidence was also evaluated. Respiration rate and PPO activity decreased markedly when longan fruits were stored at low temperature; however, they increased at the later stage of storage. Eating quality in longan fruit decreased as the period of storage increased; colour grade weight loss, and disease development increased. The titratable acidity and contents of total soluble solids and ascorbic acid decreased. It is suggested that the application of chitosan coating could be be

neficial in extending postharvest life and maintaining quality and, to some extent, controlling decay of longan fruit.