| Popis: |
1. Raising and lowering the temperature produced an increase and decrease in sugar utilization by the plant Spirogyra, and by a cold blooded animal, the ordinary gold fish, just as it does in pure chemical reactions. 2. Lowering the temperature produced a greater decrease in sugar utilization by Spirogyra than by the gold fish. 3. The effect of temperature on the rate of sugar utilization by Spirogyra and the gold fish followed very closely van't Hoff's law for pure chemical reactions, except at very low temperatures. The explanation that suggests itself for this deviation from the law is that the normal physiological mechanism for sugar utilization in the living cells of the plant and animal is impaired by very low temperatures. |
