Abstract
The effects of trimethylamine oxide and urea contained in fish flesh on the buffering capacity were examined. The results obtained were as follows:
1) Addition of trimethylamine oxide to muslce extractives increased the buffering capactiy on acid side below pH 6.25. The increase was in proportion to the amount of trimethylamine oxide.
2) Urea increased the capacity of muscle extracitves on acid side slightly below pH 4.0, whereas decreased on alkali side.
3) The buffering capacity of the muscle of elasmobranch was discussed being based on a large amount of trimethylamine oxide and urea in them.
