title: Physical and antimicrobial properties of thyme oil emulsions stabilized by ovalbumin and gum arabic.
abstract: Natural biopolymer stabilized oil-in-water emulsions were formulated using ovalbumin (OVA), gum arabic (GA) solutions and their complexes. The influence of interfacial structure of emulsion (OVA-GA bilayer and OVA/GA complexes emulsions) on the physical properties and antimicrobial activity of thyme oil (TO) emulsion against Escherichia coli (E. coli) was evaluated. The results revealed that the two types of emulsions with different oil phase compositions remained stable during a long storage period. The oil phase composition had an appreciable influence on the mean particle diameter and retention of the TO emulsions. The stable emulsion showed a higher minimum inhibitory concentration (MIC), and the TO emulsions showed an improved long-term antimicrobial activity compared to the pure thyme oil, especially complexes emulsion at pH 4.0. These results provided useful information for developing protection and delivery systems for essential oil using biopolymer.
authors.affiliation: Food Safety Key Lab of Zhejiang Province, The School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China. Electronic address: niufg123@hotmail.com.
authors.forename: Fuge
authors.initials: F
authors.lastname: Niu
authors.affiliation: Food Safety Key Lab of Zhejiang Province, The School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
authors.forename: Weichun
authors.initials: W
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Su
authors.affiliation: State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China. Electronic address: yangyj@jiangnan.edu.cn.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000045:Acacia; D000890:Anti-Infective Agents / Q000494:pharmacology*; D004655:Emulsions / Q000737:chemistry; D004926:Escherichia coli / Q000187:drug effects*; D006170:Gum Arabic; D009822:Oils, Volatile; D010047:Ovalbumin; D010936:Plant Extracts / Q000494:pharmacology*; D046930:Thymus Plant
chemical_list: D000890:Anti-Infective Agents; D004655:Emulsions; D009822:Oils, Volatile; D010936:Plant Extracts; D006170:Gum Arabic; D010047:Ovalbumin
keywords: Antimicrobial activity; Biopolymer; Emulsion; Gum arabic; Ovalbumin