Oxygen Pressure Modulation
Oxygen Pressure Modulation - Related Videos
08:58
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
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Cited by 28 •
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.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
06:01
Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure
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Cited by 5 •
2021
Polymersomes are self-assembled polymeric vesicles that are formed in spherical shapes to minimize Gibb's Free Energy. In the case of drug delivery, more elongated structures are beneficial. This protocol establishes methods to create more rod-like polymersomes, with elongated aspect ratios, using salt to induce osmotic pressure and reduce internal vesicle volumes.
09:00
Real-Time Monitoring and Modulation of Blood Pressure in a Rabbit Model of Ischemic Stroke
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Cited by 1 •
2023
Continuous arterial blood pressure recording allows the investigation of impacts of various hemodynamic parameters. This report demonstrates the application of continuous arterial blood pressure monitoring in a large animal model of ischemic stroke for determination of stroke pathophysiology, impact of different hemodynamic factors, and the assessment of novel treatment approaches.
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
The key mechanistic effect is a change in the oxygen partial pressure gradient. When pressure rises, the driving force for oxygen diffusion can increase; when it falls, oxygen availability can decrease. This makes pressure modulation useful for linking an imposed environmental change with altered oxygen-dependent activity in the system under study.
In water, the response depends not only on the pressure setting but also on how much oxygen can dissolve. Thus, changing oxygen partial pressure changes the amount available in the liquid phase and can alter oxygen supply to local biological or chemical processes. This distinction matters when interpreting results from aquatic environments.
Pressure changes can also shift local redox conditions, meaning the chemical environment changes with oxygen availability. Because oxygen-dependent reactions respond to that availability, the same organism, microbial community, sediment, or treatment system may behave differently under different pressure regimes. Researchers can therefore connect reaction or activity changes to oxygen control rather than treating them as unexplained variation.
A practical study design can establish one or more oxygen partial pressure conditions, expose the selected environmental system to those conditions, and compare responses. The adjustment may be made in a gas, liquid, or enclosed system, depending on the research question. Comparing conditions helps isolate how oxygen supply relates to respiration, nutrient cycling, pollutant transformation, or system resilience.
This approach can be applied across several environmental targets: organisms, microbial communities, sediments, and treatment systems. The target determines which response is most informative, such as respiration for biological oxygen use, nutrient cycling for environmental processing, or pollutant transformation for treatment relevance. This breadth makes it a cross-system experimental tool.
Oxygen Pressure Modulation is particularly relevant when environments fluctuate rather than remain constant. Researchers can use controlled changes to examine whether organisms, microbial communities, sediments, or treatment systems maintain function as oxygen supply shifts. Such comparisons provide context for evaluating responses to changing conditions and resilience within environmental research.