Oxidative Capacity
Oxidative Capacity - Related Videos
01:47
Lung Capacity
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2019
The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures. There are four defined lung volume measures: tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume. Tidal volume is the amount of air inhaled and exhaled in a normal breath. Inspiratory...
03:14
Oxidation Numbers
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2020
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules. Oxidation Number (Oxidation State) In the case of an ionic compound, oxidation numbers are assigned based on the number of electrons transferred between reacting species. For example, in the formation of calcium...
09:04
Skeletal Muscle Neurovascular Coupling, Oxidative Capacity, and Microvascular Function with 'One Stop Shop' Near-infrared Spectroscopy
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Cited by 5 •
2018
Here, we describe a simple, non-invasive approach using near-infrared spectroscopy to assess reactive hyperemia, neurovascular coupling and skeletal muscle oxidative capacity in a single clinic or laboratory visit.
01:24
Respiratory Capacities
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2024
Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases. One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters. The Functional Residual Capacity (FRC) represents the air in the...
01:15
Pyruvate Oxidation
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2019
After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells. First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
FAQs
Oxidative capacity can fall when oxygen delivery, substrate availability, mitochondrial abundance, or respiratory-chain function cannot meet cellular demand. These factors are interdependent: adequate oxygen is not sufficient if cells lack usable substrates or functional mitochondria. Examining them together helps bioengineers distinguish whether limited energy production reflects transport constraints, cellular condition, or impaired aerobic metabolism.
Mitochondria support oxidative capacity by housing electron transport through the respiratory chain. This process establishes a proton gradient, and that gradient drives ATP synthesis. Consequently, mitochondrial abundance and function affect how effectively cells convert available oxygen and substrates into usable energy. This relationship makes mitochondrial performance relevant when evaluating the energetic condition of engineered tissues and cultured cells.
Oxygen delivery limits oxidative capacity when cells cannot receive enough oxygen to sustain respiratory-chain activity, whereas insufficient substrate can restrict energy production even when oxygen is available. Considering both variables prevents an incomplete interpretation of metabolic performance. In bioengineering, separating these potential constraints can guide changes to culture conditions or designs intended to improve tissue support.
Measurements of oxygen consumption provide a direct indication of how actively a system uses oxygen for aerobic metabolism, while related metabolic-activity measurements add information about cellular energy use. Comparing these measurements across cultured cells, engineered tissues, biomaterials, or bioreactor conditions can reveal whether a design supports cellular demands and can help identify changes in cell health.
Researchers can use oxidative capacity to characterize engineered tissues, cultured cells, biomaterials, and bioreactor systems. The resulting metabolic information helps assess whether a construct supports the energy requirements of its cells rather than merely demonstrating structural features. It can also guide tissue design and culture optimization by showing how well the system sustains aerobic cellular activity.
In regenerative medicine, oxidative capacity measurements help evaluate whether engineered environments provide adequate support for cellular energy demands. If metabolic performance indicates inadequate oxygen transport, researchers can assess strategies intended to improve oxygen availability within the system. This connects measurements of cellular oxygen use with practical decisions about tissue design, culture conditions, and bioreactor configuration.