Yoshihiro Sakakibara

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1. Chronically normoxic, hypoxic ( $$PI_{O_2 }$$ =60 Torr) or hyperoxic ( $$PI_{O_2 }$$ ≃600 Torr) crayfish (Astacus leptodactylus,n=51) were exposed to one-hour hypercapnic periods (inspired $$P_{CO_2 }$$ , $$PI_{CO_2 }$$ =2, 4 or 6 Torr; inspired pH, pHi=8.00, 7.70 or 7.52; reference $$PI_{CO_2 }$$ =0.8 Torr and pHi=8.40) either in the morning or the(More)
The extracellular pH regulation was studied in the crayfish Astacus leptodactylus (a night animal) as a function of circadian rhythm. The venous acid-base balance (ABB) was determined in the morning (10 a.m.-12 a.m.) and in the evening (10 p.m.-12 p.m.) at PO2 ranging from 29 to 6 kPa and constant ABB in the water at 13 degrees C. In the morning the venous(More)
This paper deals with the design of the foot trajectory for a quadruped walking machine. Such walking machines should be capable of both uneven terrain walking and high-speed flat surface walking. The static walking method was used for uneven terrain walking and the dynamic walking method was used for plane walking. In the case of dynamic walking, the(More)
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