Calcium Concentration Measurement
Calcium Concentration Measurement - Related Videos
02:52
Calcification Assay to Measure Calcium Concentration in Aortic Valve Interstitial Cells
0 Views •
2025
This video demonstrates an assay technique for assessing the calcification of the aortic valve interstitial cells in vitro. The assay helps to quantify the calcium concentration using the arsenazo III reagent, a calcium-sensitive dye that reacts with calcium ions to form a purple-colored calcium-arsenazo complex.
01:27
Feedback Regulation of Calcium Concentration
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2023
Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state. Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
09:51
Monitoring Changes in the Intracellular Calcium Concentration and Synaptic Efficacy in the Mollusc Aplysia
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Cited by 4 •
2012
We demonstrate how changes in the intracellular free calcium concentration and synaptic efficacy can be simultaneously monitored in a ganglion preparation of Aplysia. We image intracellular calcium using a fluorescent dye, Calcium Orange, and induce and monitor synaptic transmission with sharp (intracellular) electrodes.
08:51
Understanding Concentration and Measuring Volumes
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2023
Solutions are utilized to some degree in almost all biological research applications. Therefore understanding how to measure and manipulate them is imperative to any experiment. In this video, concepts in preparing solutions are introduced. Solutions consist of a solute dissolved in solvent to yield a homogeneous mixture of molecular substances. Solutions are generally identified by their components and corresponding concentrations. Concentrated solutions are diluted through various...
06:34
Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner
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Cited by 7 •
2017
This manuscript describes a procedure for operating a calcium looping pilot-plant for post-combustion carbon capture with high oxygen concentrations in the calciner in order to reduce or eliminate the flue gas recycle.
FAQs
Fluorescent indicators report calcium by coupling ion binding to a change in fluorescence. The measured signal therefore provides an indirect readout of Ca2+ rather than a concentration value by itself. Calibration with known standards supplies the relationship needed to translate signal intensity into an estimated calcium concentration for cellular analysis.
Calibration is essential because fluorescence intensity alone does not state how much calcium is present. Measurements against known standards establish a conversion between signal and concentration. Applying that conversion allows investigators to compare calcium levels quantitatively, rather than only describing one sample as brighter or dimmer than another.
Both fluorescent indicators and genetically encoded sensors use calcium binding to alter fluorescence, but they represent different measurement approaches. The choice can be matched to the experimental system and the question being asked, while the shared signal principle permits quantitative analysis after calibration. This makes them useful for examining cellular physiology.
Tracking transient calcium changes can connect cellular signals with physiological responses. In biology, these patterns are relevant to muscle contraction, secretion, gene expression, and neuronal communication. Comparing the responses across cells or conditions can show whether those signaling behaviors differ in the tested experimental context.
A basic workflow begins by selecting a fluorescent indicator or genetically encoded sensor, then recording its fluorescence after calcium binding changes the signal. The measured intensity is compared with known standards during calibration, and the resulting conversion is used to estimate calcium concentration. This sequence links cellular observations to quantitative results.
It is useful when researchers need to quantify calcium-related signaling rather than simply observe that a response occurred. Applications include examining calcium changes associated with muscle contraction, secretion, gene expression, or neuronal communication. The approach also supports comparisons among cells or experimental conditions, helping relate measured concentrations to differences in cellular physiology.