title: Stability of all-trans-beta-carotene under ultrasound treatment in a model system: effects of different factors, kinetics and newly formed compounds.
abstract: The effects of factors and kinetics of all-trans-beta-carotene degradation under ultrasound treatment in a model system were investigated. The compounds of degradation were also tentatively identified by HPLC-DAD, Raman and FT-IR spectroscopy. The type of solvents and temperature were important factors in determining the degradation reaction. Liquid height, ultrasonic intensity and duty cycle of ultrasound exposure only affected the rate of degradation but did not change the nature of degradation. Degradation rate of beta-carotene in dichloromethane was the highest. Degradation rate of beta-carotene decreased with increasing of temperature. Degradation kinetics of all-trans-beta-carotene under ultrasound fitted first-order reaction at -5 to 15 degrees C, and fitted second-order reaction at 25 degrees C. Degradation products included isomers: 15-cis-beta-carotene, di-cis-beta-carotene and other compounds with function group of C-O.
authors.affiliation: Department of Food Science and Nutrition, School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, PR China.
authors.forename: Yujing
authors.initials: Y
authors.lastname: Sun
authors.forename: Guangpeng
authors.initials: G
authors.lastname: Ma
authors.forename: Xingqian
authors.initials: X
authors.lastname: Ye
authors.forename: Yukio
authors.initials: Y
authors.lastname: Kakuda
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Meng
mesh_terms: D007536:Isomerism; D007700:Kinetics; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014465:Ultrasonics; D019207:beta Carotene / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D012997:Solvents; D019207:beta Carotene