The effects of trunk-and extremity-cooling on the regional differences in thermoregulatory responses have been studied by using a separated water-perf used suit. Eight women subjects have been kept in the rest supine posture in a climatic chamber of 30.0±0.5°C in temperature, 50±3% in relative humidity, and 0.2m/sec. in air velocity. Investigations have been made two times under trunk-cooling and extremity-cooling conditions separately. A suit set temperature was initially maintained at 33°C for 30 min. and then lowered to 24°C by every 3°C for every 30min. The skin temperatures in chest, back, finger and toe decreased significantly, but those in upper arm, thigh, and leg increased significantly (p<0.05) during trunk-cooling for ninety minutes. On the other hand, only chest skin temperature rose significantly and other skin temperatures fell significantly (p<0.05) during extremity-cooling. But the chest skin blood flow in both cooling conditions increased beyond those at 0 min and 33°C. In spite of the no cooling region, the finger blood flow and the skin temperature decreased beyond those at 0 min and 33°C in both cooling conditions. The skin temperature and skin blood flow of the finger in extremity-cooling were lower than those of trunk-cooling condition. In addition, the extremity-cooling of thermal and comfort sensations were cooler and more uncomfortable that those of trunk-cooling. These results suggest that the extremity-cooling will greatly affect on thermoregulatory responses than the trunk-cooling.

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Fibrillation of Lyocell fibers was conducted by using a home mixer and the fibrillation index (FI) M was visually classified in accordance with degree of fibrillations in the range of duration of treatment time less than ten minutes. Effects of reactive dyeing and processing on the fibrillation of Lyocell fibers were investigated and discussed on the basis of (FI) M. Lyocell fibers dyed with some poly-functional reactive dyes exhibited excellent resistance to the fibrillation, whereas mono-functional dyes were not effective to depress the fibrillation. Swelling treatments with ferric sodium tartrate complex and 10% NaOH solution were also effective to give the fibrillation resistance for Lyocell fibers. Liquid ammonia treatment and high pressure steaming produced higher fibrillation resistance than the swelling treatment. The mixing method was advantageous to evaluate the degree of fibrillation from the view point of time-saving and easy operation in comparison with other methods. A reasonable correlation was found with Nicolai's deata based on a wet abrasion method.

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