搜索结果: 16-30 共查到“特种医学 high pressure”相关记录41条 . 查询时间(0.099 秒)
Nerve membrane lipid fluidity:opposing effects of high pressure and ethanol
human ethanol drinking drug crayfish animal alcohol
2009/7/17
Studies on model phospholipid membranes have shown that general anesthetics and pressure exert opposing effects--anesthetics increase and high pressure decreases membrane fluidity. The present study e...
Influence of nitrous oxide, nitrogen, neon, and helium on the beating frequency of the mouse sinus node at high pressure
cardiac animal mice nitrous oxide nitrogen neon helium sinus node
2009/7/17
The beating frequency (BF) reducing effect of 150 atm of hydrostatic pressure on mammalian cardiac pacemaker tissue (hyperbaric bradycardia) was counteracted by dissolved gas only if the gas was added...
Alterations in seizure mechanisms caused by oxygen high pressure,1,1-dimethylhydrazine,and pyridoxine
High pressure oxygen pyridoxine
2009/7/17
High pressure oxygen (HBO) and 1,1-dimethylhydrazine (UDMH) both cause grand mal seizures, brain glycogen degradation, and inhibition of glutamic acid decarboxylase (GAD). Brain glycogen degradation i...
Solubility of oxygen in a seawater medium in equilibrium with a high-pressure oxy-helium atmosphere
Solubility heliox
2009/7/17
The molar oxygen concentration in a seawater medium in equilibrium with a high-pressure oxygen-helium atmosphere was measured directly in pressurized subsamples, using a modified version of the Winkle...
A system for pharmacological studies in small animals at high pressure
pharmacological animal rat
2009/7/16
A four-liter pressure chamber was constructed for pharmacological experiments in rats; it consisted of the following: 1) a system for repeated, accurate injection; 2) an alternative single-dose inject...
Method for separation of cells and suspending medium at high pressure
human high pressure Method erythrocytes
2009/7/16
We describe a pressure chamber designed for measuring fluxes and equilibrium distributions of substances between cells in suspension and the extracellular medium at pressures up to 400 ATA. The pressu...
Effect of high pressure on EEG burst suppression dose of thiopental in rats
drug thiopental animal rat Electroencephalography heliox
2009/7/16
The anesthetic induction dose of thiopental in rats was studied at 1 ATA air, 1 ATA helium-oxygen (He-O2), 4 ATA air, and at 4 ATA air plus 67 ATA helium (71 ATA). The compression rate was 0.3 ATA/min...
Effects of high pressure on the release of excitatory amino acids by brain synaptosomes
decompression neurological
2009/7/14
Excitatory amino acid antagonists have been shown to protect against the hyperexcitability associated with exposure to high pressure. This suggests that these excitatory neurotransmitter substances ma...
An apparatus which enables aggregating agents to be added to a stirred suspension of platelets subjected to a pressure of up to 600 ATA is described. The ensuing aggregation reaction is monitored opti...
Effect of barbituric acid on the high pressure nervous syndrome in the rat
neurological rat animal high pressure nervous syndrome barbituric acid
2009/7/14
Male Sprague-Dawley rats were compressed in helium-oxygen mixture at a rate of 3 bar/min. Compression ended once the first convulsion was seen. Saline or barbituric acid at 1 or 2percent were infused ...
Effect of 2-aminophosphonoheptanoic acid on the EEG of rats exposed to high pressure
neurological rat animal
2009/7/14
Excitatory amino acid neurotransmission may be involved in the tremor component of the high pressure neurological syndrome (HPNS). 2-Amino-7-phosphonoheptanoic acid (2-APH) is a novel antagonist of ex...
Free radical reactions and the inhibitory and lethal actions of high-pressure gases
superoxide dismutase Free radical paraquat methyl viologen Escherichia coli
2009/7/14
This study was designed to test whether free radicals are involved in the deleterious effects of compressed gases on cells. The actions of xenon, nitrous oxide, argon, nitrogen, helium, and oxygen and...
The effect of high pressure on the kinetics of monoamine transmitters in the rat brain
drug hyperbaric serotonin noradrenaline dopamine animal rat monoamine transmitter
2009/7/14
The effects of 71 ATA pressure on the turnover of serotonin (5-HT), noradrenaline (NA), and dopamine (DA) were studied. High pressure increased the concentration of the 5-HT metabolite 5-hydroxyindole...
A versatile chamber for microphysiologic studies with gas mixtures under high pressure
chamber microphysiologic high pressure chamber micromanipulator
2009/7/14
A pressure chamber, designed for microelectrode recordings in isolated tissues or organs an capable of withstanding pressures up to 200 bar, is described. The versatility of the vessel allows a wide v...
Ventilatory failure in cats during prolonged exposure to very high pressure
helium heliox muscle fatigue respiratory Ventilatory failure animal cat high density gas
2009/7/14
Ten adult, awake cats were exposed to high pressure (7.5, 9, or 10 MPa) of a heliox (He-O2) or trimix (He-N2-O2) gas mixture. Total duration of the experiment, i.e., duration of compression plus sojou...