Journal of Food, Agriculture and Environment

Drying kinetics, milling quality and quantity of 2-acetyl-1-pyrroline of Thai Hom Mali rice dried by heat pump dryer under different drying conditions

Author(s):

Siri Doungporn ^*, Nattapol Poomsa-ad, Lamul Wiset

Recieved Date: 2009-09-02, Accepted Date: 2010-04-02

Abstract:

The effects of drying media and drying temperatures on drying kinetics, concentration of 2-acetyl-1-pyrroline (2AP), milling quality and whiteness of Thai Hom Mali rice cv. Khao Dawk Mali 105 were investigated. Samples were dried in a heat pump dryer and were subjected to different drying media (hot air, carbon dioxide and nitrogen gas) and drying temperatures (40, 50, 60 and 70°C). Paddy samples dried at 40 and 70°C in all media were selected to be analyzed with regard to 2AP concentrations. The results showed that the moisture ratio of paddy dried under carbon dioxide or nitrogen gas at 40°C decreased faster than that of hot air. The effective diffusion coefficient was enhanced by drying temperature. The 2AP content had significantly decreased at 70°C. There was no interaction between drying media and drying temperature on head rice yield. The highest percentage of head rice yield was obtained in samples subjected to carbon dioxide gas and dried at 40°C. In addition, the whiteness of rice obtained from paddy dried at 40°C in all media had significantly the highest values.

Keywords:

Drying behavior, fragrant rice, inert gas, heat pump dryer, diffusion

---

Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 2
Category: Food and Health
Pages: 86-90

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :