And mouse classes with often down time will be affected by permanent human health damage

6 United States scientists said that they recently conducted an experiment, and let the mouse long days and nights out, slack, living conditions, disorders of found frequently down time difference causes the mouse easy to death.　　Scientists on this view, often down time difference, for example by international flights do travel across time zones or on the night shift, move to permanent damage to the health of mankind.　　■ Experiment of Virginia in the researchers carried out the experiment, and in the latest issue of the journal of modern biology published the test report. Virginia College Professor Jean · Bullock said, "inspiration" from an accidental discovery.　　In other regarding genetic engineering experiments, he and colleagues have some mouse 6 hours earlier than usual to accept the light, others mouse accept the lighting time delay, accident found in advance to accept all the light of the mouse, a mouse is unharmed. other　　Inspired by this, the researchers put 100 mouse is divided into three groups, each group including 30 only aging mice and 9 only young rats, respectively into a different environment.　　In an initial period of 8 weeks during the experiment, the first group of mice and night cycle 6 hours a week in advance, equivalent to make these mice weekly advance over the previous weeks 6 hours wake up; the second group cycle delay six hours, while the third group to maintain natural circadian unchanged. Experiment found that in a normal day-night cycle, State of the third group of mice, the highest survival rate, 83% of aging mice survive.　　The second group of aging mice survival rate of 68%, while the lowest survival rate in the first group, only 47%.　　The second phase of the experiment, the researchers accelerate to mouse down time difference of speed, change every 4 days once a day and night cycles, and found more rats died.　　■ Analysis of researchers said that this experiment as to let the mouse "on the night shift," or by international flights flying across different time zones, frequent down time leads to them than the normal circumstances of mouse earlier died. Experiment report noted that the number of deaths in the experiment is aging mice, rats and stable performance, "reaction". Report says: "aging animals generally weak physique, which may make them more difficult to adapt to the changes of circadian upside down.　　"Experimental results show that, despite the frequent down time difference, but the mouse did not demonstrate significant stress reaction, their body's adrenal ketone, a cause of tension and stress hormone, also did not increase.　　■ Experiment report harmful? did not state whether the frequent down time can also cause deaths, but it noted that the difference down to permanent damage human health. United Kingdom scientists conducted a study that attempted to prove that often down time can have adverse effects on vision. United Kingdom Bristol University neurologists on some regular across seven time zones or more travelers conducted research. They chose 20 working on different flights over 5 years of age for women, in the 22-year-old to 28 years old, before and after their flight comparison and analysis of language, memory and emotion. Results found that, in the long flight across time zones, their body of cortisol levels higher than normal, which means that frequently down time can affect the Visual nerve, even on some important organization and function.