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Title: Effect of food ingredient on microwave freeze drying of instant vegetable soup
Authors: Wang, R.
Zhang, M.
Mujumdar, A.S. 
Keywords: Drying time
Food ingredients
Instant vegetable soup
Microwave freeze drying
Sensory quality
Issue Date: Sep-2010
Source: Wang, R., Zhang, M., Mujumdar, A.S. (2010-09). Effect of food ingredient on microwave freeze drying of instant vegetable soup. LWT - Food Science and Technology 43 (7) : 1144-1150. ScholarBank@NUS Repository.
Abstract: The objective of this work was to study the effect of three different food ingredients viz. NaCl content (1e15 g/100 gwater), sucrose content (5e25 g/100 gwater) and sodium glutamate content (0.5e10 g/100 g water) on microwave freeze drying (MFD) of instant vegetable soup. Response surface methodology (RSM) was employed to optimize their addition levels in instant vegetable soup for MFD. Finally, a comparison of MFD for instant vegetable soup with and without added ingredients was carried out. The results showed that NaCl content and sucrose content had significant influence on drying time and sensory quality, hile sodium glutamate content had insignificant effect. The optimum ingredients of the instant vegetable soup for MFD were: NaCl content of 3.2e5.3 g/100 g water, sucrose content of 2e6.8 g/100 g water and sodium glutamate content of below 4.5 g/100 g water. Comparing with MFD vegetable soup without ingredients, condiments addition could increase drying rate and shorten drying time. © 2010 Elsevier Ltd.
Source Title: LWT - Food Science and Technology
ISSN: 00236438
DOI: 10.1016/j.lwt.2010.03.007
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