title: Stability and bioaccessibility of β-carotene in nanoemulsions stabilized by modified starches.
abstract: Oil-in-water nanoemulsions stabilized by food-grade biopolymer emulsifiers (modified starches) were fabricated using high-pressure homogenization in an effort to improve the stability and bioaccessibility of β-carotene. Physicochemical and biological properties of β-carotene nanoemulsions were investigated considering the particle size, β-carotene retention, and in vitro digestion. During 30 days of storage at different conditions, the mean diameters of the emulsion systems were increased by 30-85%. The retention of β-carotene in nanoemulsions was significantly higher compared to that of the β-carotene dispersed in bulk oil. After in vitro digestion, the bioaccessibility of β-carotene was increased from 3.1% to 35.6% through nanoencapsulation. The results also indicated that modified starch with high dispersed molecular density led to a higher retention but lower bioaccessibility of β-carotene in nanoemulsions. This could be due to the thick and dense interfacial layer around the oil droplets. This result provides useful information for developing protection and delivery systems for carotenoids.
authors: State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China.
authors: Rong
authors: R
authors: Liang
authors: Charles F
authors: CF
authors: Shoemaker
authors: Xiaoqing
authors: X
authors: Yang
authors: Fang
authors: F
authors: Zhong
authors: Qingrong
authors: Q
authors: Huang
mesh_terms: D001682:Biological Availability; D004063:Digestion; D004655:Emulsions / Q000737:chemistry; D006801:Humans; D008954:Models, Biological; D013213:Starch / Q000737:chemistry*; D019207:beta Carotene / Q000737:chemistry*
chemical_list: D004655:Emulsions; D019207:beta Carotene; D013213:Starch