منابع مشابه
Oxygen: The Kiss of Life
Recent guidelines emphasize the importance of an active life for COPD patients, including those with chronic respiratory failure.2 Oxygen supplementation increases exercise performances and prevents oxygen desaturation during daily activities in patients with “overt” or “latent” chronic respiratory failure.3 This highlights the importance of correctly titrating home oxygen flow for when these p...
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Oxygen is crucial to maintain and save human life. Other than medical purposes it is widely used for manufacture of mineral water, fabrication works and other industrial activities. If adequate precautionary measures are not adopted while handling, storage or transport of oxygen cylinder or container, accidental blast may claim human life and other damage as well. The case involving three victi...
متن کاملOxygen radicals, oxygen toxicity and the life of microorganisms.
The electronic structure of dioxygen in the ground state dictates that its reduction occur most easily by a univalent pathway which involves the dangerously reactive intermediates 02, H202 and OH. The oxygenation of earth’s biosphere 3.5 x 10~ years ago provided both opportunity and threat. The opportunity to exploit oxygen for energy-yielding and biosynthetically useful oxidations has been sei...
متن کاملLife in a sea of oxygen.
Duringmy third week of high school chemistry, our instructor left in themiddle of class in obvious pain and passed away shortly thereafter. This sad event could have spelled disaster for a budding career in chemistry, except for the fact that it occurred at Brandywine High School near Wilmington, Delaware, where 2,500 Ph.D. chemists lived in the school district. These includedmy father, Robert ...
متن کاملLife at stable low oxygen levels: adaptations of animals to oceanic oxygen minimum layers.
Zones of minimum oxygen level are found at intermediate depths in most of the world's oceans and, although the oxygen partial pressure in some of these 'oxygen minimum layers' is only a fraction of a kilopascal, populations of pelagic metazoans exist there. These oxygen minimum layers are areas of the water column and the associated benthos with stable conditions of continuously low oxygen leve...
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ژورنال
عنوان ژورنال: American Journal of Food and Nutrition
سال: 2018
ISSN: 2374-1155
DOI: 10.12691/ajfn-6-1-3