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Volume 20 (1983)
- Issue 3 Pages 9-
- Issue 2 Pages 47-
- Issue 1 Pages 1-
Volume 20, Issue 2
Displaying 1-5 of 5 articles from this issue
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Goro HORIE, Yoshimasa SAKURAI, Naoki MATSUBARA1983 Volume 20 Issue 2 Pages 47-54
Published: October 15, 1983
Released on J-STAGE: October 13, 2010
JOURNAL FREE ACCESSEffects of moderate room temperature on short time performance of one figure addition and subjective estimation of the environment were studied. The data used were obtained in the synthetic estimation study of combined three environmental stress room temperature, noise and illumination in summer. Subjects were healthy male students who majored in engineering. Environmental conditions were as follows; four categories of room temperatures (22.0, 26.0, 30.0 and 31.0±2.0°C, rh=60±10%, V 0.15m/s) and noise (40, 50, 60 and 70±2 Leq (A) ), three categories of illumination (170 ±50, 700 ±50 and 1500±100 lx) . Their combinations were 48 patterns in all. Methods of analysis were the theory of quan-tification 1 and 2 by Hayashi.
Results showed that the subjective estimation of the environment was higher at 22.0 and 26.0°C and lowest at 34.0°C. On the contrary, performance was lowest at 30.0°C and the curve of performance vs room temperature showed nearly “U” shape in the range of experimental temperatures.View full abstractDownload PDF (713K) -
Tomie OHNO, Akihiro KUROSHIMA1983 Volume 20 Issue 2 Pages 55-60
Published: October 15, 1983
Released on J-STAGE: October 13, 2010
JOURNAL FREE ACCESSMale adult rats were fed standard laboratory chow (C) or 32% sucrose solution plus standard laboratory chow (S) for 4 to 5 weeks. S caused an increase in caloric intake, but the increase in body weight did not differ between C and S. S exhibited an improved cold tolerance and an enhanced nonshivering thermogenesis (NST) . This enhanced NST was associated with increased brown adipose tissue size and increased plasma insulin level.
From these results it is concluded that sucrose overfeeding could provoke a cross-adaptive effect to cold, probably by potentiating NST in brown adipose tissue.View full abstractDownload PDF (756K) -
Koich IWANAGA, Kazuhiko YAMASAKI, Akira YASUKOUCHI, Haruhiko SATO, Mas ...1983 Volume 20 Issue 2 Pages 61-68
Published: October 15, 1983
Released on J-STAGE: October 13, 2010
JOURNAL FREE ACCESSIn order to investigate the seasonal difference in physiological responses to heat, nine young Japanese males were exposed in supine position to the hot environment at 50°C with 50% relative humidity for 61 minutes in July (summer) and December (winter) . Rectal temperature at 28°C prior to heat exposure was significantly higher in summer than in winter. During heat exposure, rectal and mean skin tempeartures were significantly higher in summer than in winter, but their increase rates did not show significant differences between summer and winter. It was considered that seasonal differences of rectal and mean skin temperatures during heat exposure were due to their seasonal differences before exposure. It was concluded that basic physiological state induced by seasonal acclimatization may have important roles in physiological response to heat and heat tolerance of man.View full abstractDownload PDF (925K) -
Takehiro YAHATA, Akihiro KUROSHIMA1983 Volume 20 Issue 2 Pages 69-73
Published: October 15, 1983
Released on J-STAGE: October 13, 2010
JOURNAL FREE ACCESSIn order to know a role of sympathetic function in men, 26 nude male subjects were exposed to 10°C or 5°C for 30 min and the changes in energy metabolism and plasma catecholamine levels were studied.
Energy metabolism was elevated by 9.9±2.05 kcal/m2/h and 23.5±3.24 kcal/m2/h after 10°C and 5°C exposure, respectively. Plasma noradrenaline level was also significantly elevated in both ambient temperatures, but there is no difference between the increments in both temperature conditions: 451±141.1 pg/ml in 10°C and 321±72.4 pg/ml in 5°C. There is a positive correlation between the percent increases in plasma noradrenaline and those in energy metabolism after 10°C exposure but not after 5°C exposure.
These results indicate that noradrenaline may be associated with cold-induced thermo-genesis in men.View full abstractDownload PDF (543K) -
Keizo SHIRAKI, Nobuhide KONDA, Sueko SAGAWA1983 Volume 20 Issue 2 Pages 74-80
Published: October 15, 1983
Released on J-STAGE: October 13, 2010
JOURNAL FREE ACCESSA comparison of temperatures measured in the lower esophagus, tympanic membrane and in the blood of right atrium and aortic arch was made during iatrogenic hyperthermia for the treatment of malignant metastatic cancer in a patient. At a steady state or during a slow change in blood temperature, temperatures of both the esophagus and the tympanic membrane were close to that of the aortic arch. However, we preferred the esophageal temperature as an index of the blood temperature, because measuring esophageal temperature could be performed simply and safely without giving any discomfort to the subject, and moreover the temperature change of the esophagus reflected quantitatively and quickly (lag time; 40-60 sec) the change of the blood temperature. Temperature of the tympanic membrane will be restricted to use as an index of the blood temperature because of the discomfort induced by touching a thermocouple to the membrane and a longer lag time (240 sec) to respond to the change in the blood temperature.View full abstractDownload PDF (776K)
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