Abstract:

Effect of vacuum treatment on sugar permeability of coconut kernel was investigated in this paper. Sugar permeability rate exhibited an increase with the increase of vacuum treatment duration within 15 min. No significant change in sugar permeability was observed at the vacuum treatment time over than 15 min. Increased number of repeated vacuum treatments did not exhibit obvious effect on sugar permeability of coconut kernel. After removing vacuum treatment, sugar permeability rate of coconut kernel could increase by extending gas-filling time within 90 min. During immersing coconut kernel in sugar solution, sugar permeability of coconut kernel was mainly occurred in the first 6 h after vacuum treatment. In addition, it was better for sugar permeability to vacuum-treated coconut kernel with immersion into sugar solution. Higher temperature of sugar solution could promote sugar permeability within 90 ℃.

Key words: coconut point, coconut, vacuum-treated sugar permeability, sugar permeability rate