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KMID : 0380620200520050516
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Korean Journal of Food Science and Technology
2020 Volume.52 No. 5 p.516 ~ p.523
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Physicochemical properties of supercritical carbon dioxide defatted mealworm (Tenebrio molitor) powder and protein isolate
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Kim Yang-Ji
Kim Seok-Joong
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Abstract
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Supercritical carbon dioxide (SCO2) extraction was applied for the defatting of mealworm to prepare defatted powder (DP) and protein isolate (PI) and compare the process to press and hexane extraction, with respect to DP and PI physicochemical properties. SCO2 DP was obtained by extracting 34.40% oil at 41.37 MPa, 40oC for 180 min, and the product contained 71.66% crude protein, which is similar to that of hexane DP and higher than that of press DP. In using alkali protein extraction to prepare PI from DP, SCO2 was as effective as hexane and better than press. SCO2 produced brighter DP and PI than press, but not as much as hexane. Protein solubility was similar in all DP, with minimum values at pH 5. The highest water adsorption capacity was noticeable for SCO2 PI, and SCO2 DP showed an oil adsorption capacity comparable to that of hexane DP. SCO2 DP and PI had better foaming capacity than press DP and PI and showed superior emulsion activity compared to others.
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KEYWORD
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mealworm, supercritical carbon dioxide, defatted powder, protein isolate, physicochemical properties
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