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Brain stimulation in rats exposed to hyperbaric environments
hyperbaric environments Brain pressures
2009/7/20
Six rats were trained to make an operant response to receive brief trains of electrical current to the lateral hypothalamus (self-stimulation). All animals were then randomly exposed to pressures of 4...
Voice fundamental frequency levels of divers in helium-oxygen speaking environments
human heliox speaking Voice speech intelligibility
2009/7/20
Divers under hyperbaric conditions experience a marked deterioration in speech intelligibility. Included among the possible features that contribute to speech degradation is change/distrotion of speak...
Thermal measurements on divers in hyperbaric helium-oxygen environments
cold human Thermal measurement heliox
2009/7/17
During a series of three saturation dives to simulated depths of 1000, 1200, and 1400 fsw at the Ocean Simulation Facility, measurements were made to establish the rate of heat loss of unclad divers i...
Correspondence of brain and rectal temperatures of guinea pigs in helium environments
helium-oxygen environment thermal animal guinea pig
2009/7/16
Brain and rectal temperatures were measured in guinea pigs exposed to helium-oxygen environments at pressures as high as 50 bars. Very high correlations (r = .856, P less than 0.001) between the two v...
Mechanical and physical factors in lung function during work in dense environments
hypoventilation pulmonary human
2009/7/15
The major effects of breathing dense gas during physical exercise in hyperbaric environments can be traced to high airway resistance during inspiration and expiration and especially to an increased te...
Energy expenditure and fluid production in hyperbaric He-O2 environments using doubly labeled water
saturation CO2 carbon dioxide helium heliox hyperbaric thermal stress
2009/6/12
Energy expenditure (EE), carbon dioxide production (rCO2), water turnover (rH2O), and urine production (UP) were measured to determine nutrient requirements of U.S. Navy divers during saturation dives...
Immune function in hyperbaric environments, diving, and decompression
decompression hyperbaric CD4-CD8 Ratio Complement Immunity Lymphocyte
2009/6/8
The purpose of this review is to examine the influence of exposure to hyperbaric oxygen (HBO2) deep diving, and decompression on various facets of the immune response. Potential changes during exposur...
AAUS Standards for Scientific Diving Operations in Cave and Cavern Environments: A Proposal
Standards Diving Cave Karst
2009/5/6
In 1996, the AAUS Standards for Scientific Diving Certification and Operation of Scientific Diving Programs was published in its third edition. That edition called for the development of supplementary...
A Fisheries Habitat Survey Method for Nearshore Environments Utilizing Scuba.
Energy expenditure and fluid production in hyperbaric He-O2 environments using doubly labeled water
saturation CO2 carbon dioxide helium heliox hyperbaric thermal stress
2009/3/30
Energy expenditure (EE), carbon dioxide production (rCO2), water turnover (rH2O), and urine production (UP) were measured to determine nutrient requirements of U.S. Navy divers during saturation dives...