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Crystallisation and moisture sorption properties of selected Australian unifloral honeys
Author(s) -
Yao Lihu,
Bhandari Bhesh R,
Datta Nivedita,
Singanusong Riantong,
D'Arcy Bruce R
Publication year - 2003
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.1421
Subject(s) - sorption , crystallization , relative humidity , moisture , chemistry , absorbance , eucalyptus , humidity , materials science , botany , horticulture , chromatography , biology , adsorption , organic chemistry , physics , thermodynamics
The sorption properties of yapunyah ( Eucalyptus ochropholia ) and yellow box ( Eucalyptus melliodora ) honeys (Australian unifloral honeys) were investigated in a controlled relative humidity (RH) environment at 30 °C for 71 days. The original water activity of the honeys affected the sorption properties. These two honeys absorbed moisture at and above 67.9% RH and desorbed moisture at and below 51.4% RH. The crystallisation behaviour of tea tree ( Melaleuca quinquenervia ) and yapunyah honeys was studied during storage at 13 and 23 °C. The degree of crystallisation was monitored by measuring the absorbance at 660 and 665 nm using a spectrophotometer. The heat‐treated honeys did not show any sign of crystallisation after 5 months, whereas a seeding with precrystallised honey induced crystallisation of the same honeys. This crystallisation was more rapid at 13 than at 23 °C. Copyright © 2003 Society of Chemical Industry