Lycopene Z-isomerization and degradation in a series of hydrophobic natural deep eutectic solvents (HNDES) was firstly studied. The highest lycopene retention (about 84.6%) was found in HNDES composed of thymol and menthol (TM), and fatty acid-based HNDES promoted lycopene Z-isomerization (about 70% for total Z-isomers) and degradation. The addition of allyl isothiocyanate (AITC), diallyl disulfide (DADS) and capric acid into TM promoted Z-isomerization of lycopene (80% for total Z-isomers), especially 5Z-isomer (>30%), while lycopene remaining rate in TM/-capric acid was below 20%. During lycopene extraction from tomato power and watermelon juice by TM, the ratios of Z-isomer significantly (p < 0.05) increased especially with AITC and DADS (up to about 80%), and extraction yields increased even > 100% with capric acid. Lycopene in TM/-capric acid extracts showed low degradation with Z-isomers increasing during storage. TM with capric acid could simultaneously promote lycopene Z-isomerization and extraction.
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Lycopene in hydrophobic deep eutectic solvent with natural catalysts: A promising strategy to simultaneously promote lycopene Z-isomerization and extraction.
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November 2023
School of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, China. Electronic address:
Lycopene Z-isomerization and degradation in a series of hydrophobic natural deep eutectic solvents (HNDES) was firstly studied. The highest lycopene retention (about 84.6%) was found in HNDES composed of thymol and menthol (TM), and fatty acid-based HNDES promoted lycopene Z-isomerization (about 70% for total Z-isomers) and degradation.
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Department of Materials Process Engineering, Nagoya University, Furo-cho, Nagoya, Aichi 464-8603, Japan; Super Critical Technology Centre Co. Ltd., Hanowari, Ooaza Izumi, Kuwana-shi, Mie 511-0838, Japan.
Daily consumption of carotenoids is associated with multiple health benefits, but their bioavailability is generally extremely low. In this context, the Z-isomerization is receiving attention as a method for increasing carotenoid bioavailability because this approach is superior to conventional physical approaches. Here we investigated the feasibility of using isothiocyanate-functionalized silica (Si-NCS) as a heterogeneous catalyst for carotenoid isomerization.
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Faculty of Science & Technology, Meijo University.
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Department of Materials Process Engineering, Nagoya University.
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Department of Materials Process Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
Since lycopene -isomers exhibit greater bioavailability and biological activity than the naturally occurring all--isomer, efficient manufacturing methods for ()-lycopene-rich materials are urgently needed. Herein, a method was developed for -isomerization of (all-)-lycopene in tomato oleoresin using heat treatment and a natural catalyst, viz. allyl isothiocyanate (AITC).
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