| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Although light at night-time contribute to make our living environment comfortable and safe, it reduce melatonin secretion and induce health risk such as cancerogenesis. This study investigated light-induced melatonin suppression at night on flickering light and steady light. Decrement of melatonin level after exposure to flickering light of 100Hz was smaller than that of steady light. However, flickering light of 1000Hz suppressed melatonin secretion as well as steady light. These finding suggests that light-induced melatonin suppression at night might be reduced under flickering light, but it depends on frequency of the flickering light.
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