منابع مشابه
Treatment of Neo-vascularization with Oxygen at High Pressure.
(1) It has long been known that the vessels of the central nervous system, including those of the retina, are sensitive to the ambient oxygen concentration. Cusick, Benson, and Boothby (1940) were able to show that there was a considerable reduction in the calibre of the retinal vessels in the normal subject who breathed pure oxygen for short periods, and Sieker and Hickam (1953) have shown tha...
متن کاملInteractions of Oxygen at High Pressure and Radiation in Drosophila
Oxygen at high pressure (OHP) and X-irradiation can interact in the fruit fly Drosophila melanogaster to potentiate toxic actions characteristic of one agent alone. 1000 kvp X-irradiation in doses of 30, 60, and 75 kr accelerated the acute immobilization of young male Drosophila by oxygen at 7.8 atm, up to rates twice that observed with such oxygen pressure alone. X-irradiation alone in these d...
متن کاملABC of oxygen: oxygen at high altitude.
The number of people travelling to the high altitude regions, especially South America, Nepal, and India, has risen enormously in the past 10 years. Without special climbing ability these trekkers can be exposed to altitudes they will not have encountered in their home countries. For example, the height of Everest base camp is 5500 m whereas the top of Mount Blanc, the highest mountain in the A...
متن کاملAnaesthesia for radiotherapy under high-pressure oxygen.
FOLLOWING experimental work on animals it has been suggested that the effectiveness of X-ray treatment of tumours may be increased by the simultaneous administration of oxygen under high pressure (Gray et al., 1953). To determine if these results were applicable to be made much more radiosensitive by increasing the oxygen tension. Many tumours, however, contain large numbers of cells which, bec...
متن کاملChemistry at high pressure.
Chemistry involves the study of the reactions and properties of the elements and their compounds. After over two centuries of systematic chemical research, combined with the modern use of spectroscopy and diffraction methods to determine structure and valence states and detailed quantum mechanical investigations of interatomic bonding; it is now generally accepted that the fundamentals of chemi...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1877
ISSN: 0036-8733
DOI: 10.1038/scientificamerican08111877-1337asupp