ความคิดเห็นที่ 17
เจ้าตัวนี้มันเข้า Hibernate mode ได้ครับ Metabolism = 0 ... ตามนี้ครับ (ปล. เอามาจากลิ้งค์คห.5 ครับ)
Tardigrades are survivors par excellence, the best in the animal kingdom. They can survive many environmental extremes by converting themselves into a 'tun'. This involves them pulling in their legs to give their body a cylindrical shape and then shutting down all their metabolism. any other animal that is exhibiting zero metabolism is considered to be dead. Only tardigrades regularly return to life again from this state. They perform this miracle by replacing the water in their membrane lipids with a sugar called trehalose. Different species have different survival characteristics and not all species form a tun, deep sea species, which can survive pressures as great as 6000 atmospheres for instance do not.
Other species have been known to survive temperatures as low as -272 for a few minutes which is a close to absolute zero as you ever want to get, colder than outer space. They have also survived temperatures as low as -200 for more than 20 days. Other species can go to the other extreme and survive temperatures as high as 125C well above the boiling point of water. still others survive doses of X-rays 250 times greater than that which would kill a mammal. Tardigrades are the only animals that can survive having their photo taken in an Scanning Electron Microscope which involves placing them in a vacuum and then bombarding them with electrons. Species which survive periods of drought i.e. extreme dehydration have been revived after lying dormant for 120 years amongst the dried mosses in a botanical museum. There is no doubt that tardigrades could travel to the stars amongst the dust on a piece of rock were the earth ever to be destroyed. Scientists don't really know what their limits are but we do know they are the toughest animals alive for sure.
จากคุณ :
pzifrius 
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19 พ.ย. 49 13:17:14
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