Manometric determination

Methods utilizing the determination of enzymically released methanol, either after distillation,59,64 or directly in the reaction mixture,109 just like the method of manometric determination of the carbon dioxide released from hydrogen carbonate buffer,55 have not found... 

A2.1 Factors to Consider When Estimating Water Vapor Pressure A2.2 Dew-Point Method for the Determination of Water Activity A2.3 Measurement of Water Activity Using Isopiestic Method A2.4 Direct Manometric Determination of Vapor Pressure A2.5 Measurement of Water Activity by Electronic Sensors... 

Mason, M, F. The Manometric Determination of Amino Acids. Biochem. J. 

After World Wat II, analytical methods for amino acids were improved and new methods were introduced. The first was microbial assay using lactic acid bacteria which requite aU of the tegular amino acids for growth. Manometric determination (by use of a Warburg manometer) of CO2 Hberated by the... 

The hydrostatic pressure results from the weights of the continuous and dispersed phase and can, thus, serve as a measure for the particle mass or volume concentration. In the context of analytical sedimentation, it was already utilised by Ostwald and Hahn (1922), who quantified the rate of sedimentation of flocculated suspensions by means of a hydrostatic pressure gauge. More recent papers report on the manometric determination of the hydrostatic pressure in analytical cuvettes centrifuges with electronic pressure transmitters (Bickert 1997 Beiser 2005). In contrast to the detection systems portrayed above, these manometer centrifuges do not measure a local particle concentration, but the total mass of all particles that are suspended above the point of measurement. The cumulative function of the volume weighted size distribution (gsfxstokes)) can be, thus, computed liom the time derivative of the hydrostatic pressure. In that regard, the manometric detection shows similarity to the sedimentation balance. 

Obviously a number of assay methods could be used to measure disappearance of amino acid, appearance of keto acid, appearance of ammonia, or appearance of H2O2. The traditional method, manometric determination of oxygen consumption, is most frequently employed. This reaction is useful for the determination of D-amino acids, although the determination is not very sensitive as the Km is over 10. The reaction has a pH optimum near 9. 

Hanstveit R (2003a) Trichloromethylstannane (CAS 993-16-8) Determination of the ready biodegradability in a manometric respiration test Delft, TNO, September (Repert Ne. V2492/01). 

Hanstveit R (2003f) Determination of the ready biodegradability of dichlorodioctylstannane in a manometric respiration test. 

A range of different methods measures the solubility of hydrogen in metals and alloys. Manometric methods [98] and gas volumetric methods [99] have been used to determine pressure-composition isotherms at selected temperatures for a range of alloys [100-103],... 

ISO 2556, Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method, 1974. 

By the late 1920s quantitative micro-determination of oxygen uptake had been developed in Warburg s laboratory in Berlin based on a manometric technique introduced by Barcroft and Haldane (1902). With this equipment evolution of carbon dioxide or uptake of oxygen could be monitored Carbon dioxide produced in respiration was absorbed by potassium hydroxide. If bicarbonate buffer was used, acid production caused carbon dioxide to be released. Krebs and others from... 

ISO 1663 1999 Rigid cellular plastics - Determination of water vapour transmission properties ISO 2556 1974 Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method ISO 6179 1998 Rubber, vulcanized or thermoplastic - Rubber sheets and rubber-coated fabrics - Determination of transmission rate of volatile liquids (gravimetric technique)... 

The first two determinations by radiation absorption require accurate measurements of the extinction coefficients of ozone (a measurement of the absorption efficiency of the incoming radiation at a maximal absorption wavelength) in the ultraviolet and the infrared. Three different principles have been used over the last 20 years to measure the extinction coefficient of ozone in the ultraviolet at 254 nm manometric, decomposition stoichiometry, and gas-phase titration. The manometric method, which is based on pressure measurements of gaseous ozone, requires (in at least one case ) a substantial and somewhat uncertain correction for decomposition and the method of decomposition stoichiometry depends on the pressure change that accompanies the decomposition of ozone to oxygen, 20, 30,. Clyne and Coxon determined ozone... 

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