منابع مشابه
Anoxia and Brightness Discrimination
1. Brightness discrimination has been studied with individuals breathing oxygen concentrations corresponding to 7 altitudes between sea level and 17,000 feet. The brightnesses were 0.1, 0.01, and 0.001 millilambert involving only daylight (cone) vision. 2. At these light intensities, brightness discrimination begins to deteriorate at fairly low altitudes. The deterioration is obvious at 8,000 f...
متن کاملAnoxia tolerant brains.
While medical science has struggled to find ways to counteract anoxic brain damage with limited success, evolution has repeatedly solved this problem. The best-studied examples of anoxia-tolerant vertebrates are the crucian carp and some North American Freshwater turtles. These can survive anoxia for days to months, depending of temperature. Both animals successfully fight any major fall in bra...
متن کاملCerebral anoxia in infantile dehydration.
The severe constitutional symptoms appearing in the course of infantile diarrhoea form a characteristic picture referred to as toxicosis. The most prominent features of this toxic condition are medical shock, acidosis, acidotic breathing, functional failure of the kidneys and characteristic nervous symptoms. Clinically the nervous symptoms are characterized by extreme prostration, sometimes pre...
متن کاملCereal Seed Germination under Anoxia
The great majority of seeds from higher plants fail to germinate under anoxic conditions. While the metabolic pathways operating during the aerobic process of seed germination are well described, there is only limited evidence concerning metabolic pathways operating under conditions of limited oxygen availability. This is despite the importance of carbohydrate availability for plant tolerance t...
متن کاملRevealing how goldfish defy anoxia.
Just a few rare vertebrates – three carp relatives and two species of turtles – show the astonishing capacity to survive without any oxygen for days, while all others die within minutes (Bickler and Buck, 2007; Nilsson, 2010). By the end of the 1970s, the ability of these anaerobic champions had already been known for decades, but the physiological mechanisms underlying their survival were not ...
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ژورنال
عنوان ژورنال: Annals of Surgery
سال: 1939
ISSN: 0003-4932
DOI: 10.1097/00000658-193911000-00004