昼夜循环 diurnal cycle
- 首先,你的卧室必须安静、黑且暗,因为黑暗的环境会促进松果体产生褪黑激素,这种激素正是控制昼夜循环的(就是你那个24小时制的生物钟)。
Your room should be quiet and sufficiently dark, because darkness prompts the pineal gland to produce melatonin, the hormone that regulates circadian rhythms (your 24-hour body clock). - 商品化鼠粮喂养,自来水龙头供水,维持12:12小时昼夜循环,温度维持在22℃左右,相对湿度40%-60%。
They were fed commercial rat food and tap water and were housed under controlled temperature (around 22 C) and relative humidity (40%-60%) conditions with a 12-12 hour light-dark cycle. - 这些脑细胞就像是人体内部的生物钟,有的具有大约24.5[font=宋体]个小时的自然节律(因此一个人处于黑暗之中,渐渐地,他与白天的同步性会降低);其他的脑细胞则可以根据眼睛感应的昼夜循环来维持这一生物钟。
These brain cells actas the body's internal clock. Some maintain a natural rhythm of roughly 24.5hours (thus a human kept in the dark will gradually fall out of synchronisationwith the day).
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