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DRYING CHARACTERISTICS AND PRODUCT QUALITY OF OKRA

 

作者: U.S. Shivhare,   A. Gupta,   A.S. Bawa,   P. Gupta,  

 

期刊: Drying Technology  (Taylor Available online 2000)
卷期: Volume 18, issue 1-2  

页码: 409-419

 

ISSN:0737-3937

 

年代: 2000

 

DOI:10.1080/07373930008917712

 

出版商: Taylor & Francis Group

 

关键词: blanching;diffusion. Page's model

 

数据来源: Taylor

 

摘要:

Effects of size (whole and sliced), pre-treatment (blanching in water and 0.5% NaCl solution at 95° C) and temperature of drying air (40, 55 and 70° C) on the drying characteristics and quality of okra were studied. Estimation of the drying rate established that the drying of okra takes place under the falling rate period. Page's model was found to adequately describe the drying behavior of okra over a wide range of drying conditions used in the study. The coefficients of Page's model were correlated with air temperature and it was found that the dependence of the rate constant on the drying air temperature can be described using the Arrhenius law. The quality of the dried product was found to be best when okra was sliced and blanched at 95° C in 0.5% NaCl solution for 5 min and then dried at 55° C.

 

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