Journal
FOOD HYDROCOLLOIDS
Volume 113, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2020.106497
Keywords
High internal phase pickering emulsions; Pea protein; High methoxyl pectin; beta-Carotene; Chemical stability; Bioaccessibility
Categories
Funding
- National Natural Science Foundation of China [31601512]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515010747, 2019A1515011690, 2017A030313046]
- Science and Technology Innovation Commission of Shenzhen [JCYJ20180305125358023, JCYJ20170818143102818, JCYJ20170818093429961, KQJSCX20180328095421750]
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Novel protein-polysaccharide colloidal particles have been successfully developed for stabilizing and delivering beta-carotene-loaded HIPPEs, showing improved pH and storage stability as well as enhanced retention of beta-carotene at pH 6.0. Additionally, these colloidal particles contributed to increased lipolysis and bioaccessibility of beta-carotene within HIPPEs, demonstrating potential for controlled release and improved chemical stability.
The demand for novel-delivery systems with natural biopolymers to stabilize and deliver biologically active and functional beta-carotene (BC) is increasing. Protein-polysaccharide colloidal particles exhibited great potential for the stabilization and delivery of BC-loaded high internal phase Pickering emulsions (HIPPEs). In this study, pea protein isolate (PPI) and high methoxyl pectin (HMP) colloidal particles were fabricated and used for stabilizing and delivering BC-loaded HIPPEs. PPI-HMP complexes exhibited spherical shapes with Z-average diameters of 379 nm at pH 4.0. Turbidity, zeta-potential, and fluorescence spectroscopy results evidenced that the formations of PPI-HMP colloidal particles were primarily driven by electrostatic attraction. pH, and storage stability of HIPPEs was profoundly enhanced with PPI-HMP colloidal particles. HIPPEs with PPI-HMP colloidal particles exhibited the highest BC retention and the chemical stability of BC at pH 6.0 (68.3%) was pronouncedly higher than that at pH 3.0 (49.5%). Confocal laser scanning microscope (CLSM) graphs demonstrated HIPPEs were stabilized by a dense network surrounding the oil droplets. Compared to corn oil (control), both PPI and PPIHMP complex-stabilized HIPPEs exhibited a higher extent of lipolysis and BC bioaccessibility. Both lipolysis extent and BC bioaccessibility of HIPPEs with PPI-HMP colloidal particles (36.5%, and 25.8%) were lower than those with PPI (42.7%, and 31.4%). This research evidenced that PPI-HMP complex colloidal particles can be synthesized for fabricating stable BC-loaded HIPPEs with enhanced chemical stability and controlled release property.
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