Abstract
Viscous behavior of sugar cane juice was measured and the effect of machine harvesting with chopping method on the viscosity was discussed.
1. Mixed juice showed non-newtonian flow shown by the following equation.
τ=(9.0-0.1t)D0.79×10-2[dyne/cm2]
(τ: shearing strength, D: shear rate, t: temperature)
2. Clear juice obtained by lime treatment showed almost the same newtonian flow as the sucrose solution which has the same concentration with the mixed juice. This result suggested that the behavior of the non-newtonian flow of the mixed juice was developed by polysaccharides and proeins removed by the lime treatment.
3. Viscosity of the mixed juice produced from mechanically harvested sugar cane was 2.6-2.0 times of that produced from manually harvested one. This fact suggested that the physiological activity of the sugar cane was changed by a vigorous mechanical stimulus.
