✍ Scribed by Leo J. Fritschen; James Simpson
No coin nor oath required. For personal study only.
The construction and recording of pressure transducers for measuring atmospheric pressure and total pressure, i.e. a hydraulic weighing lysimeter, is described. The principle of operation consists of a variable concentric capacitor to control the frequency of oscillation of a free-running multivibrator. The sensitivity of the transducers was 84 Pa Hz -1 and 8 mm H20 Hz -l . Techniques which would increase the resolution of atmospheric pressure to 0.7 Pa and of a standpipe to 0.06 mm H20 are discussed. The temperature coefficient of the transducers is about 0.5 Hz°C -1 .
📜 SIMILAR VOLUMES
A simple apparatus is described for the generation of isotopic hydrogen gas by acid-catalysed hydrolysis of sodium borotritide or borodeuteride. The apparatus may be conveniently utilised for isotopic hydrogen reductions of from 20 urn01 to 1 mmol scale.
## Abstract A fast quantitative high‐performance liquid chromatographic separation method with atmospheric pressure chemical ionization mass spectrometric detection (HPLC‐APCI‐MS) was developed for the determination of low‐molecular‐mass aliphatic mono‐ and dicarboxylic acids typically present in d
## Abstract The relative rate technique has been used to determine the rate constants for the reactions Cl + CH~3~OCHCl~2~ → products and Cl + CH~3~OCH~2~CH~2~Cl → products. Experiments were carried out at 298 ± 2 K and atmospheric pressure using nitrogen as the bath gas. The decay rates of the org
## Abstract Prostaglandins (PGA~2~, PGE~1~, PGE~2~, PGF~2α~) and their methyl esters served as standards to show the possibility of application of mass spectrometry with extraction of dissolved ions at atmospheric pressure (EDIAP) for prostaglandin identification. Applying EDIAP mass spectrometry t
Rate constants for three dimethylbenzaldehydes and two trimethylphenols have been determined for the OH reactions at and atmospheric pressure using a relative rate method. The OH reaction rate constants were placed on an absolute basis using the literature rate constant for 1,2,4-trimethylbenzene of