title: Study of sorption behavior, shelf life and colour kinetics of vacuum puffed honey powder at accelerated storage conditions.
abstract: In the study, the storage life of vacuum puffed honey powder at accelerated storage environment (90 % relative humidity and 36 °C) was computed by determining the sticky-point moisture content as the critical parameter of the honey powder. The value of monolayer moisture content in the GAB model was calculated to be 0.081 kg water/kg dry solids by fitting water activity and moisture sorption data. Shelf life of the honey powder was predicted to be 222 days when the powder was packaged in aluminum foil-laminated polyethylene pouches with permeability value of 5.427X10(-8) kg/m(2)//day/Pa. Actual shelf life of honey powder was experimentally determined as 189 days and analysis of mean relative percent derivation modulus (Rd) and root mean square (RMS) established the accuracy and acceptability of the technique for the prediction of shelf life of honey powder. Overall colour deviation pattern followed first order reaction kinetics with rate constant (k1) as 0.037 day(-1). This study revealed overall colour difference of 18.1 till the end of shelf life with drastic change during initial storage period.
authors.affiliation: Department of Agricultural Engineering, Assam University, Silchar, Assam 788 011 India.
authors.forename: K Deepika
authors.initials: KD
authors.lastname: Devi
authors.affiliation: Department of Agricultural Engineering, Assam University, Silchar, Assam 788 011 India.
authors.forename: Sanjib Kr
authors.initials: SK
authors.lastname: Paul
authors.affiliation: Centre for Rural Development Technolgy, Indian Institute of Technology, Delhi, New Delhi, 110 016 India.
authors.forename: Jatindra K
authors.initials: JK
authors.lastname: Sahu
keywords: Accelerated storage life; Colour kinetics; Hygroscopicity; Shelf life; Sticky point temperature; Vacuum puffing