• Applied Biological Chemistry
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• v.19 no.1
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• pp.36-40
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• 1976

The mucilage of the root of Abelmoschus manihot, MEDIC is important for production of Korean traditional hand-made paper. This study was proceeded to detect the variation of the amount of free reducing sugars and of the viscosity in the mucilage. The results as follow. 1. The mucilage of the root of Abelmoschus manihot, MEDIC has contained some of free reducing sugars, 2. The viscosity of the mucilage isolated from the root decreases with time at the constant temperature, but the amount of reducing sugars show a little change. 3. The amount of the reducing sugars is not changed on the agitation. 4. When $1{\sim}2%$ ammonium sulfate solution is added, the viscosity of the mucilage decreases very gradually, and the amount of the free reducing sugars in the mucilage shows a little change.

• Applied Biological Chemistry
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• v.22 no.1
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• pp.42-50
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• 1979

The viscosity coefficient of mucilage of Abelmoschus manihot, MEDIC root decrease under the influence of temperature and the other various physical and chemical factors. The rate of viscosity change of the mucilage have been measured at $5^{\circ}{\sim}50^{\circ}C$ in aqueous state under the various conditions. The results are as follows: 1. Relationship between rate of viscosity change of mucilage and temperature can be represent as Andrade equation. 2. Their activation energies of viscosity change of Abelmaschus maihot, MEDIC root A, B, C, D, E, F and G observed are 11.9, 12.1, 11.4, 12.1, 11.6, 13.8 and 13.2 Kcal/mole, respectively. And other activation parameters arc evaluated. 3. The activation energy of naturally mucilage are smaller than that of sterilized mucilage.