1. The optimal temperatures for the action of amylase obtained from the middle intestine of silkworm have been determined. 2. The optimal hydrogen ion concentration for the amylase action has been determined to be PH=9.4–11.3 at 30–40°C. 3. The amylase charges positively in alkaline reaction, and negatively in acid reaction, the isoelectric point being at about PH=5.7.
1. A new method was devised to apply extremely strong electric force to gases and dielectric liquids, and accelerate their reactions. 2. Using this method, many reactions between gases and liquids under the action of strong electric force were studied. Thereby the effect of temperature elevation and presence of metallic powders (catalyser) were also studied. 3. In connecting with the electric discharge some interesting phenomena were observed.
1. The sorption velocity of ammonia by sugar charcoal has been measured, extending over six months. 2. It was known that the charcoal absorbs ammonia for a very long time, taking more than several months to arrive at the equilibrium condition. 3. The sorption velocity from one hour forward can be expressed by an equation. x=Klogt+k. where x is the sorption amount, t the time, and K and k are the constants. 4. The mechanisms of sorption have been discussed. 5. The sorption velocity depends upon the dissolution velocity of ammonia molecules into the narrow molecular cavities of charcoal.