Optical cell for the study of biological systems under high gas pressures
نویسنده
چکیده
A high-pressure system incorporating an optical cell and suitable for the study of aqueous biological systems is described. The high-pressure system can be assembled from commercially available components. Using the system gas pressures up to 70 MPa of various gases can be generated from pressures available in the laboratory and maintained over samples for extended periods of time. Preliminary optical measurements on aqueous solutions incubated with nitrogen or methane gas pressures have indicated that there is a gas-specific interaction between the solution and the gas. Biological membranes and their components are modified by the aqueous solutions incubated against high-pressure methane whereas nitrogen incubated solutions do not show comparable effects. Some of the observed modifications are irreversible whereas others are reversible when pressure is reduced. Q 1995 American Institute’of Physics.
منابع مشابه
CARBON DIOXIDE MINIMUM MISCIBILITY PRESSURE ESTIMATION (CASE STUDY)
Carbon dioxide flooding is considered to be one of the most effective enhanced oil recovery methods for the light oil reservoirs. Depending on the operating pressure, the process might be miscible or immiscible. Minimum miscibility pressure (MMP) is the most important parameter for assessing the applicability of any miscible gas flood for an oil reservoir. The miscibility condition is determine...
متن کاملFabrication, characterization and investigation of gas sensing properties of MoO3 thin films
In this research, molybdenum oxide (α-MoO3) thin films were coated on glass substrates using spray pyrolysis technique. 0.05 M ammonium heptamolybdate tetrahydrate was used as precursor and deionized water as solvent. The effects of carrier gas pressure, during the spraying of the solution, on the structural, optical, morphological and gas sensing properties of thin films were studied. X-ray di...
متن کاملImpacts of coal shrinkage, permeability and petrography on gas regime in mines Case study: Tahmoor coal mine, NSW, Australia
The volumetric changes in the coal matrix (Coal Shrinkage), permeability under various gas environment conditions as well as perographical properties were studied in the laboratory. The shrinkage and permeability of coal were examined with respect to changing gas type and confining pressures. The shrinkage tests were carried out in high-pressure bombs while the permeability study was conducted ...
متن کاملDesigning and Constructing Blood Flow Monitoring System to Predict Pressure Ulcers on Heel
Background: A pressure ulcer is a complication related to the need for the care and treatment of primarily disabled and elderly people. With the decrease of the blood flow caused by the pressure loaded, ulcers are formed and the tissue will be wasted with the passage of time.Objective the aim of this study was to construct blood flow monitoring system on the heel tissue which was under external...
متن کاملImaging and Analysis of Auto-Ignition and Heavy Knock in a Full Bore Optical SI Engine
The work involved a fundamental study of auto-ignition under unusually high knock intensities for an optical spark ignition engine. The single-cylinder research engine adopted included full bore overhead optical access capable of withstanding continuous peak in-cylinder pressures of up to 150bar. A heavy knock was deliberately induced under relatively low loads using inlet air heating and a pri...
متن کامل