منابع مشابه
Cartesian diver technique.
Micro respirometry studies, with the aid of the Cartesian diver (1, ,2), have presented several problems in manipulation. One of these has been the problem of mixing two or more solutions quantitatively in the diver, after the start of an experiment. Methods have been described accomplishing this (3,4). These methods could be mastered only by special training, patience, and skill. A much less d...
متن کاملAn extension of the Cartesian diver micro respirometer technique.
A frequent criticism of the various microtechniques available for the measurement of small changes in gas volumes has been that mixing of two or more solutions at any desired time during the experiment is inconvenient or impossible. This criticism does not apply to the instrument designed by Heatley et al. (1) in which 2 drops, 1 containing a paraffin-coated steel sphere, may be mixed by magnet...
متن کاملTwo-liquid Cartesian diver
It is quite easy to make a version of the well known Cartesian diver experiment that uses two immiscible liquids. This allows students to test their knowledge of density and pressure in explaining the diver’s behaviour. Construction details are presented here together with a mathematical model to explain the observations. M This article features online multimedia enhancements The Cartesian dive...
متن کاملCartesian Diver as a Density Comparator
A hydrostat ic weighing system is described t hat provicies inciepenci (' nt valu ('s of apparent mass with a standard deviat ion of a bou t 0.2 microgra m. The ciefi ni t ion of " inciep(, IHI<'n t" used here includes the requirement t hat t he sample under observat ion be removed from Lhe water, dried, and recleaned between measurements. This precis ion is between one a nd two orders better t...
متن کاملClaes Hellerström and Cartesian diver microrespirometry
Cartesian diver microrespirometry was introduced by Claes Hellerström at the Department of Histology/Medical Cell Biology at Uppsala University, Sweden, to determine rates of oxygen consumption in islets of Langerhans. The theory behind this method is touched upon and the main findings described. Glucose-stimulated beta cell respiration significantly contributes to increased ATP generation, whi...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1949
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)51253-4