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The magnetic diver differential micro gasometer

, : The magnetic diver differential micro gasometer. Analytical Biochemistry 70(2): 526-536

The magnetic differential microgasometer described is basically an equalarm torsion balance for measuring the reduced weight of submerged objects. The buoyancy changes are compensated for by the magnetic force acting on the same arm where the change has occurred (substitution method of weighing). Two ampullae, 1 with the sample and the other with the blank, are placed into the loops mounted at the ends of the arms. The gas volume and the geometry of the ampullae are practically equal. The instrument is stable and fairly insensitive to changes of barometric pressure and temperature, and it can be used for gasometric measurements in an open flotation vessel. The applicability of the method for experiments where high blanks cannot be avoided was demonstrated by respiration measurements of multiplying cells and by measurements of cholinesterase activity of muscle end-plate samples.

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Accession: 006712852

PMID: 1267145

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Related references

Hellerström, C., 1966: Oxygen consumption of isolated pancreatic islets of mice studied with the cartesian-diver micro-gasometer. Biochemical Journal 98(1): 7c-9c

Hammar, H.; Hellerström, C., 1968: Oxygen consumption of the germinal epithelium in psoriatic human skin as measured by the Cartesian diver micro-gasometer. Acta Dermato-Venereologica 48(6): 563-566

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Oman, S.; Grubic, Z.; Brzin, M., 1977: Automation of a magnetic diver balance for reduced weight and micro gasometric measurements. A device for automation of both the simple and the differential magnetic diver balance is described. By using a mechanically chopped laser beam and double-beam system, a large proportional sensitivity of the controller and considerable stability o...

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Siest G., 1969: Determination of the blood oxygen with the aid of the micro gasometer of natelson. Pharmacien Biologiste(61): No

Siest G., 1969: Measurement of blood carbon mon oxide with the micro gasometer of natelson. Pharmacien Biologiste(61): No

Tennyson, V.M.; Brzin, M., 1970: The appearance of acetyl cholin esterase in the dorsal root neuro blast of the rabbit embryo a study of electron microscope cytochemistry and micro gasometric analysis with the magnetic diver. Journal of Cell Biology 46(1): 64-80

Klekowski, R.Z., 1971: Cartesian diver micro-respirometry. Unknown

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