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Molecules 2007, 12(4), 917-931; doi:10.3390/12040917

Effects of Different Carriers on the Production of Isoflavone Powder from Soybean Cake

 and *
Department of Nutrition and Food Sciences, Fu Jen University, Taipei 242, Taiwan
* Author to whom correspondence should be addressed.
Received: 2 April 2007 / Revised: 24 April 2007 / Accepted: 25 April 2007 / Published: 30 April 2007
(This article belongs to the Special Issue Phenolics and Polyphenolics)
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The objectives of this study were to use soybean cake as the raw material for the production of isoflavone powder and compare the effects of different carriers as well as drying methods on the powder quality. Results showed that with spray drying, a level of 40 % maltodextrin as carrier produced the highest yield (mass) of isoflavone powder, followed by 10 % gelatin and 1 % sodium alginate. However, a reversed trend was observed for the isoflavone content. With 1 % sodium alginate, freeze drying generated the greatest yield of isoflavone powder, followed by vacuum drying and spray drying. The isoflavone content also exhibited the same tendency. With poly-g-glutamicacid (g-PGA) as carrier, all six levels studied (0.57, 0.28, 0.14, 0.028, 0.014 and 0.003 %) were capable of forming powder containing high amounts of total isoflavone, which was comparable to that using 1% sodiumalginate by freeze drying. Both high- and low-molecular-weight g-PGA showed similar effects in terms of powder yield and isoflavone content.
Keywords: Isoflavone powder; soybean cake; g-PGA; sodium alginate; maltodextrin Isoflavone powder; soybean cake; g-PGA; sodium alginate; maltodextrin
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kao, T.-H.; Chen, B.-H. Effects of Different Carriers on the Production of Isoflavone Powder from Soybean Cake. Molecules 2007, 12, 917-931.

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