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. 2019 Mar 16;24(6):1042. doi: 10.3390/molecules24061042

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Model for oxidative reactions in dry tomato powder at a_w below the monolayer moisture (Mo) (left side) and at a_w well above Mo (right side). = oxygen, = water; Lyc = lycopene, Ax = hydrophilic antioxidant, LH = unsaturated fatty acid, L° and LOO° = radicals, LOOH = peroxide. At a_w below Mo, MD could enhance oxygen binding due to decreased hydrophilicity of the matrix and larger pore sizes, thus increasing lycopene degradation rate. At a_w well above Mo, MD could encapsulate the hydrophilic antioxidants thus hampering lycopene regeneration.

Inline graphic — Model for oxidative reactions in dry tomato powder at a_w below the monolayer moisture (Mo) (left side) and at a_w well above Mo (right side). = oxygen, = water; Lyc = lycopene, Ax = hydrophilic antioxidant, LH = unsaturated fatty acid, L° and LOO° = radicals, LOOH = peroxide. At a_w below Mo, MD could enhance oxygen binding due to decreased hydrophilicity of the matrix and larger pore sizes, thus increasing lycopene degradation rate. At a_w well above Mo, MD could encapsulate the hydrophilic antioxidants thus hampering lycopene regeneration.