title: A new colored beverage disinfection system using UV-A light-emitting diodes.
abstract: In this study we evaluated the ability of the UV-A-LED to eliminate bacteria in a colored beverage. Ten edible pigments were used to make a colored solution at concentrations of 1.0%, 0.1%, 0.01% and 0.001%. We used a colony-forming assay to monitor the bactericidal action against the bacteria. The bactericidal effect of UV-A-LED against Escherichia coli DH5 a decreased with the increasing concentration of almost all of the edible pigments. Although less effective in colored solutions and commercially available orange juice than in the positive control PBS, it holds potential for further development and use to ensure food and water safety.
authors.affiliation: Japan Science and Technology Agency Innovation Satellite Tokushima 2-1 Minami Jyosanjima-cho, Tokushima City, Tokushima 770-8506, Japan.
authors.forename: Xin
authors.initials: X
authors.lastname: Lian
authors.forename: Kayo
authors.initials: K
authors.lastname: Tetsutani
authors.forename: Mai
authors.initials: M
authors.lastname: Katayama
authors.forename: Masayuki
authors.initials: M
authors.lastname: Nakano
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Mawatari
authors.forename: Nagakatsu
authors.initials: N
authors.lastname: Harada
authors.forename: Akiko
authors.initials: A
authors.lastname: Hamamoto
authors.forename: Masayuki
authors.initials: M
authors.lastname: Yamato
authors.forename: Masatake
authors.initials: M
authors.lastname: Akutagawa
authors.forename: Yohsuke
authors.initials: Y
authors.lastname: Kinouchi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Nakaya
authors.forename: Akira
authors.initials: A
authors.lastname: Takahashi
mesh_terms: D001628:Beverages / Q000382:microbiology*; D015169:Colony Count, Microbial; D004926:Escherichia coli / Q000254:growth & development / Q000528:radiation effects*; D005514:Food Irradiation / Q000379:methods*; D014466:Ultraviolet Rays