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Lycopene: Heterogeneous Catalytic E / Z Isomerization and In Vitro Bioaccessibility Assessment Using a Diffusion Model
Author(s) -
Sun Qingrui,
Yang Cheng,
Li Jing,
Raza Husnain,
Zhang Lianfu
Publication year - 2016
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.13419
Subject(s) - lycopene , chemistry , catalysis , isomerization , diffusion , titanium dioxide , nuclear chemistry , melting point , carotenoid , organic chemistry , materials science , biochemistry , thermodynamics , physics , metallurgy
Highly efficient heterogeneous catalytic E / Z isomerization of lycopene was achieved using an iodine‐doped titanium dioxide (I‐TiO 2 ) catalyst prepared by sol‐gel method. The effects of reaction temperature and reaction time were investigated in detail. The maximum total Z ‐ratio of lycopene exceeded 78% after 2 h of refluxing at 75 °C in ethyl acetate. Moreover, lycopene samples with a series of total Z ‐ratios were prepared and the bioaccessibility of these samples was estimated using a diffusion model, the results showed that the bioaccessibility of lycopene markedly increased conforming to a linear regression model with increasing of the total Z ‐ratio of lycopene from 3.6% to 78.5%. Furthermore, the specific role of the microstructure and melting point of 3.6% and 78.5% total Z ‐ratio of lycopene was also investigated to understand the probable mechanism for the enhanced bioaccessbility of ( Z )‐lycopenes.