Automatically Recording Respirometer

Automatically Recording Respirometer.

Recently, several different types of devices have been developed which automatically record oxygen consumption of biological cultures. This article describes one of these devices and discusses its application.

A new micro-respirometer with automatic setting and recording apparatus.

The instrument was designed to measure the O2 uptake of living material which consumes between o-oi and 5-0 yl. O2/ hr. Its accuracy is +o-ooi /u.1., and it has the following advantages over other micro-respirometers of similar sensitivity. (a) It is robust, easy to handle and is suitable for routine use. (b) The respirometer constant is independent of the gas volume of the reaction vessel. (c)...

Evaluation of the total carbonaceous biochemical oxygen demand method, using a compensated recording respirometer.

The total carbonaceous biochemical oxygen demand test is described, and experimental data demonstrating its stoichiometry, precision, and accuracy are presented. The test is more reproducible and faster than the current 5-day biochemical oxygen demand test procedure, and if a respirometer is used, the effects of toxic chemicals, pH changes, and nutrient imbalances can be routinely monitored. Th...

A simple electrolytic respirometer for the continuous recording of oxygen consumption under constant and natural conditions.

A Manometric Respirometer for Snails

IN the course of an investigation into the physiology of the edible snail {Helix pomatia L.), it became necessary to measure the respiration individually of large numbers of animals. A system in which CO,-free air was passed over the animals and then through baryta was tried but rejected because the snails apparently dislike currents of air, tending to withdraw into their shells. Analysis of ga...