Oxygen Electrode
Oxygen Electrode - Related Videos
03:02
Standard Electrode Potentials
0 Views •
2020
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
08:58
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
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Cited by 27 •
2011
We present an experimental procedure for measuring the partial pressure of oxygen (pO2) in cerebral vasculature based on oxygen-dependent quenching of phosphorescence. Animal preparation and imaging procedures were outlined for both large field of view CCD-based imaging of pO2 in rats and 2-photon excitation based imaging of pO2 in mice.
08:31
Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
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Cited by 3 •
2018
Here we present a protocol for anaerobic protein purification, anaerobic protein concentration, and subsequent kinetic characterization using an oxygen electrode system. The method is illustrated using the enzyme DesB, a dioxygenase enzyme which is more stable and active when purified and stored in an anaerobic environment.
08:29
Fabrication of Amperometric Electrodes
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Cited by 8 •
2009
This protocol describes how to generate carbon fiber electrodes. The electrodes are subsequently used to detect catecholamine release from vesicles with carbon fiber amperometry.
09:08
Detecting Reactive Oxygen Species
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2023
Reactive oxygen species are chemically active, oxygen-derived molecules capable of oxidizing other molecules. Because of their reactive nature, there are many deleterious effects associated with unchecked ROS production, including structural damage to DNA and other biological molecules. However, ROS can also be mediators of physiological signaling. There is accumulating evidence that ROS play significant roles in everything from activation of transcription factors to the mediation of...
FAQs
At the polarized cathode, dissolved oxygen undergoes reduction, and the resulting electrical current changes with the oxygen reaching the electrode. The gas-permeable membrane separates the sensing chemistry from the sample while allowing oxygen transfer. This arrangement converts oxygen availability in a liquid into a measurable electrical signal for following metabolic changes over time.
Oxygen must cross the membrane before it can participate in the electrode reaction, while polarization supports its reduction at the cathode. These components connect the sample’s dissolved oxygen to the measured current. Consequently, membrane transfer and cathode conditions influence how faithfully changes in oxygen availability appear in the experimental signal.
Substrates, inhibitors, temperature, and oxygen availability can all change the measured response because they alter the activity of the biological system being examined. Comparing oxygen consumption or production before and after one controlled change helps identify how that condition affects respiration, metabolism, photosynthesis, or an enzyme reaction, rather than treating the signal as a fixed property.
The direction of oxygen change in the liquid indicates whether the biological preparation is removing oxygen or producing it. A decline supports analysis of oxygen consumption, whereas oxygen production can indicate a different metabolic outcome, including photosynthetic activity. Tracking these changes under controlled conditions helps evaluate functional responses to experimental treatments.
For mitochondrial studies, the sensor provides a way to examine oxygen consumption as an indicator of organelle activity. Researchers can test how mitochondria respond to substrates or inhibitors and compare the resulting signals. Similar measurements extend to cellular respiration, tissue and organelle function, and enzyme reactions, allowing investigators to evaluate metabolic performance across biological systems.
These experiments help connect an observed oxygen change with broader biological questions, including pathway characterization and responses to experimental conditions. In biology, the approach supports studies of respiration, photosynthesis, metabolism, and enzyme activity. Its value comes from linking a direct chemical signal to functional changes in cells, organelles, tissues, or biochemical reactions.