搜索结果: 1-14 共查到“军事医学与特种医学 pressures”相关记录14条 . 查询时间(0.109 秒)
Analysis of frog neuromuscular function at hyperbaric pressures
animal frog neuromuscular function hyperbaric
2009/7/20
Nerve and muscle compound action potentials were measured in the frog sciatic nerve-gastrocnemius muscle preparation in a hyperbaric helium-air environment. Helium pressure to 69 ATA induced a reversi...
Speech intelligibility at high helium-oxygen pressures
human Speech intelligibility heliox
2009/7/16
Word-list intelligibility scores of unprocessed speech (mean of 4 subjects) were recorded in helium-oxygen atmospheres at stable pressures equivalent to 1600, 1400, 1200, 1000, 860, 690, 560, 392, and...
Vascular pressures and passage of gas emboli through the pulmonary circulation
pulmonary air animal dog
2009/7/10
Anesthetized dogs received venous air infusions at 0.35 ml.kg-1.min-1. In 60% of a group of 15 dogs, venous bubbles spilled over into the arterial circulation and were detected with the ultrasound Dop...
Involvement of serotonin in the enhancement of the rat spinal excitability by high pressures
2009/7/10
Using an electrical stimulation of the reticulospinal tract at the level of the medial longitudinal fasciculus, the effects, and the neurochemical mechanisms of these effects, of a progressive increas...
Bronchomotor response to cold air or helium-oxygen at normal and high ambient pressures
cold helium heliox hyperbaric human air lung animal rabbit
2009/7/10
Effects of inhalation of cold air or helium-oxygen mixture on lung resistance (RL) were studied in anesthetized and tracheotomized rabbits under normal ambient pressure and in human volunteers under n...
Effects of CO2 and N2 partial pressures on cognitive and psychomotor performance
CO2 carbon dioxide nitrogen narcosis cognitive psychomotor performance
2009/7/8
This study examined N2 and CO2 components of narcosis by comparing the effects of three levels of PETCO2 [low = 29 mmHg (SD = 4 mmHg), medium = 47 mmHg (SD = 1 mmHg), high = 57 mmHg (SD = 2 mmHg)] at ...
Human brainstem auditory-evoked potentials in deep experimental diving to pressures up to 62.5 bar
chamber auditory evoked potentials high pressure nervous syndrome
2009/7/8
The neural mechanisms underlying the high pressure neurologic syndrome (HPNS), which limit man's safe advance to extreme diving depths, are still unclear. This work was aimed at a better understanding...
Urinary ANP,ADH,and electrolyte excretion during saturation-excursion diving to pressures equivalent to 250 and 300 m
hyperbaric Urine saturation
2009/7/8
Four male divers were exposed to an environment of 26 and 31 atm abs He-O2 for 2 days. Urine was collected during the day (0700-1900 h) and at night (1900-0700 h) before (predive 1 atm abs air), durin...
Effects of high hydrostatic pressures on secondary structure of acetylcholinesterase with and without carbachol
hydrogen carbachol acetylcholinesterase
2009/6/12
Ultra-high hydrostatic pressures (to 13 kbar) were applied to acetylcholinesterase (AChE) in the presence and absence of 1 mM carbachol (a muscarinic agonist) by means of a piston-and-cylinder system ...
Evaluation of Subcutaneous Oxygen Tensions at Varied Ambient Oxygen Pressures in Mice
Subcutaneous Oxygen Tension PRESSURE animal
2009/5/8
Criswell DW, Mehm WJ. Evaluation of Subcutaneous Oxygen Tensions at Varied Ambient Oxygen Pressures in Mice. J. Hyperbaric Med 1992; 7(2):81-87.
Effects of CO2 and N2 partial pressures on cognitive and psychomotor performance
CO2 carbon dioxide nitrogen narcosis cognitive psychomotor performance
2009/3/30
This study examined N2 and CO2 components of narcosis by comparing the effects of three levels of PETCO2 [low = 29 mmHg (SD = 4 mmHg), medium = 47 mmHg (SD = 1 mmHg), high = 57 mmHg (SD = 2 mmHg)] at ...
Effects of high hydrostatic pressures on secondary structure of acetylcholinesterase with and without carbachol
hydrogen carbachol acetylcholinesterase
2009/3/30
Ultra-high hydrostatic pressures (to 13 kbar) were applied to acetylcholinesterase (AChE) in the presence and absence of 1 mM carbachol (a muscarinic agonist) by means of a piston-and-cylinder system ...
Nitrogen partial pressures in man after decompression from simulated scuba dives at rest and during exercise
decompression nitrogen air chamber
2009/3/26
In 5 subjects arterial and central venous nitrogen partial pressures (PN2) were measured after decompression from a chamber dive following a decompression schedule for scuba diving. The simulated dive...
O2 pressures between 0.12 and 2.5 atm abs, circulatory function, and N2 elimination
rebreather decompression nitrogen elimination hypoxiaoxygen
2009/3/25
To study the effects of inhaled oxygen pressures on N2 elimination, 72, 2-h washouts were performed in 6 subjects at oxygen pressures of 0.12, 0.2, 1.0, 2.0, and 2.5 atm abs using a closed circuit sys...