連續的振動ガ生理的現象ニ及ボス影響ニ就テノ實驗的研究 : 第1報動物ノ體重及ビ生存期間ニ及ボス影響

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A train in motion produces two typen of vibration: vertical or, up-and-down, and a side-to-side lurching movement. To test the effects of these motions upon the body-weight and the life period of animals the following experiments were performed: (1) One group of rabbits was placed in a box constructed so as to shake vertically with a vibrating amplitude of 2cm. and at a vibrating Speed of 140 times per minute. A second group of rabbits was placed in a box prepared to reproduce the lurching vibrations of trains, i.e., the box moved from side to side with an angle of inclination 7°34'4", and at a vibrating speed of 140 times per minute. These two boxen were shaken continuously by eleetric power, and the effeets upon the animals noted. It was found that the vertical vibration caused but relatively slight injuries. The body-weight deereases rather slowly at first, but after a certain period the decreasing Stops despite the continuance of the vibrations. The body-weight thus lost was not recovered however even after a long rest. Some of the animals lived for a long period under these conditions although some of them died of diseases which developed while they were being shaken. Those animals subjected to the lurching (the side-to-side motions), died after 9 to 21 days (mean 16.5), The rate at which the body-weight declined was much higher than in the case of the animals shaken vertically. Just prior to death, the weight of the animals suffered an additional sudden decrease. From these results, and from my former conclusions concerning the life-period of spermatozoa subjected to vibrations, we may conelude that the vertical motion of trains has but relatively little harmful effect upon passengers, while the lurching motion has a much more serious effect. (2) Two groups of white rats under an absolute fast were subjected to continuous horizontal vibrations. The vibrating amplitude of the first group was 2cm., and of the second, 4cm. The first group died in 2.5 days, and the second in 2.0 days, while those rate which while an an absolute fast, were not being subjected to vibrations (the contrast) lived for about 6 days. These results demonstrate the injurious effects of vibration upon the life period of animals. The longer the period of vibration is continued, the greater the rate at which the body weight diminishes.
京都府立医科大学の論文
1937-00-00

連續的振動ガ生理的現象ニ及ボス影響ニ就テノ實驗的研究 : 第1報動物ノ體重及ビ生存期間ニ及ボス影響

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連續的振動ガ生理的現象ニ及ボス影響ニ就テノ實驗的研究 : 第1報 動物ノ體重及ビ生存期間ニ及ボス影響

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連續的振動ガ生理的現象ニ及ボス影響ニ就テノ實驗的研究 : 第1報動物ノ體重及ビ生存期間ニ及ボス影響