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Molecules 2018, 23(2), 495; https://doi.org/10.3390/molecules23020495

Physicochemical Properties and Chemical Stability of β-Carotene Bilayer Emulsion Coated with Bovine Serum Albumin and Arabic Gum Compared to Monolayer Emulsions

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College of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China
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Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, 381 Wushan Road, Guangzhou 510640, China
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School of Chemical Engineering and Energy Technology, Dongguan University of Technology, College Road 1, Dongguan 523808, China
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Guangzhou Entry-Exit Inspection & Quarantine Bureau of China, Guangzhou 510623, China
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Authors to whom correspondence should be addressed.
Received: 17 January 2018 / Revised: 20 February 2018 / Accepted: 20 February 2018 / Published: 23 February 2018
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Abstract

β-carotene is a lipophilic micronutrient that is considered beneficial to human health. However, there are some limitations in utilizing β-carotene in functional foods or dietary supplements currently because of its poor water dispersibility and chemical stability. A new type of β-carotene bilayer emulsion delivery system was prepared by a layer-by-layer electrostatic deposition technique, for which were chosen bovine serum albumin (BSA) as the inner emulsifier and Arabic gum (GA) as the outer emulsifier. The physicochemical properties of bilayer emulsions were mainly characterized by droplet size distribution, zeta potential, rheological behavior, Creaming Index (CI), and encapsulation ratio of β-carotene. Besides this, the effects of processing conditions (pH, thermal treatment, UV radiation, strong oxidant) and storage time on the chemical stability of bilayer emulsions were also evaluated. The bilayer emulsion had a small droplet size (221.27 ± 5.17 nm) and distribution (PDI = 0.23 ± 0.02), strong zeta potential (−30.37 ± 0.71 mV), good rheological behavior (with the highest viscosity that could reduce the possibility of flocculation) and physical stability (CI = 0), high β-carotene encapsulation ratio (94.35 ± 0.71%), and low interfacial tension (40.81 ± 0.86 mN/m). It also obtained better chemical stability under different environmental stresses when compared with monolayer emulsions studied, because it had a dense and thick bilayer structure. View Full-Text
Keywords: β-carotene; bilayer emulsion; bovine serum albumin (BSA); Arabic gum (GA); physicochemical property; chemical stability β-carotene; bilayer emulsion; bovine serum albumin (BSA); Arabic gum (GA); physicochemical property; chemical stability
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Sheng, B.; Li, L.; Zhang, X.; Jiao, W.; Zhao, D.; Wang, X.; Wan, L.; Li, B.; Rong, H. Physicochemical Properties and Chemical Stability of β-Carotene Bilayer Emulsion Coated with Bovine Serum Albumin and Arabic Gum Compared to Monolayer Emulsions. Molecules 2018, 23, 495.

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