Oxygen Water Control
Oxygen Water Control - Related Videos
09:38
Dissolved Oxygen in Surface Water
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Dissolved oxygen (DO) measurements calculate the amount of gaseous oxygen dissolved in surface water, which is important to all oxygen-breathing life in river ecosystems, including fish species preferred for human consumption (e.g. bluegill and bass), as well as decomposer species critical to the recycling of biogeochemical materials in the system. The oxygen dissolved in lakes, rivers, and oceans is crucial for the...
11:49
Quantitative and Temporal Control of Oxygen Microenvironment at the Single Islet Level
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Cited by 10 •
2013
Microfluidic oxygen control confers more than just convenience and speed over hypoxic chambers for biological experiments. Especially when implemented via diffusion through a membrane, microfluidic oxygen can provide simultaneous liquid and gas phase modulations at the microscale-level. This technique enables dynamic multi-parametric experiments critical for studying islet pathophysiology.
16:24
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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Cited by 13 •
2012
The goal of this experiment is to determine and control the size, shape and stability of self-assembled discotic amphiphiles in water. For aqueous based supramolecular polymers such level of control is very difficult. We apply a strategy using both repulsive and attractive interactions. The experimental techniques applied to characterize this system are broadly applicable.
06:44
Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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Cited by 1 •
2023
Oxide materials show many exotic properties that can be controlled by tuning the oxygen content. Here, we demonstrate the tuning of oxygen content in oxides by varying the pulsed laser deposition parameters and by performing postannealing. As an example, electronic properties of SrTiO3-based heterostructures are tuned by growth modifications and annealing.
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.
FAQs
A stable target is necessary because dissolved oxygen changes as biological and chemical oxygen demand change. Monitoring reveals whether concentration is drifting, while regulation restores the chosen condition through aeration, mixing, gas exchange, or oxygen removal. This process helps distinguish biological responses caused by oxygen availability from responses caused by uncontrolled environmental variation, improving experimental interpretation.
These processes adjust oxygen concentration through different control routes. Aeration and gas exchange can increase oxygen availability, mixing helps distribute oxygen through the water, and oxygen removal can lower concentration when levels exceed the target. Choosing among them depends on whether the system requires oxygen addition, redistribution, or reduction as biological and chemical demand changes.
Low oxygen conditions can alter aerobic metabolism and affect the survival, growth, metabolism, and behavior of aquatic organisms. They may also change microbial activity and ecological interactions. Measuring and regulating oxygen allows researchers to examine tolerance to low-oxygen conditions under controlled circumstances rather than treating oxygen availability as an unmeasured source of variation.
A practical workflow begins by measuring dissolved oxygen, selecting a target level, and determining whether the concentration is changing as biological or chemical oxygen demand shifts. Researchers then adjust aeration, mixing, gas exchange, or oxygen removal as needed and continue monitoring. Repeated measurement and adjustment help maintain consistent conditions throughout the experiment.
It is useful whenever researchers need to relate oxygen availability to respiration or microbial activity. Controlled oxygen conditions can support comparisons among samples, organisms, or treatments while reducing variation caused by changing oxygen concentration. The resulting observations help clarify how aerobic metabolism and microbial processes respond as oxygen availability is maintained or altered.
In aquatic ecosystem research, controlled oxygen conditions help investigators examine how oxygen availability influences organismal survival, growth, metabolism, behavior, and ecological interactions. The method also supports studies of tolerance to low-oxygen conditions by providing a defined environmental variable. Consistent regulation makes it easier to connect observed biological outcomes with oxygen-related conditions.