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Roles of Electrolytes: Calcium and Phosphate

Roles of Electrolytes: Calcium and Phosphate

Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily...

Water and Mineral Acquisition

Water and Mineral Acquisition

Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.

Phosphate Buffer

Phosphate Buffer

The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
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Minerals

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Minerals are essential nutrients that the human body needs in small amounts to work properly. They play a vital role in many bodily functions, such as building strong bones and transmitting nerve impulses. Some minerals are needed for hormone production or to maintain a normal heartbeat. Major minerals include calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium, while trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.

Major...

Strong Acid and Base Solutions

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A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.

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Wave Parameters

The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...

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Related Experiment Video

Updated: Feb 2, 2026

Thermal Measurement Techniques in Analytical Microfluidic Devices

Thermal Measurement Techniques in Analytical Microfluidic Devices

Published on: June 3, 2015

Solution rheological parameters modulate calcium phosphate mineralization in a microfluidic device.

Aimee A Sanford¹, Geoffrey Conklin¹, Jason A Miech¹

¹Emmanuel College, Department of Chemistry and Physics, 400 The Fenway, Boston, MA 02115, United States of America.

Materials Science & Engineering. C, Materials for Biological Applications

|November 15, 2018

Summary

Flowing conditions significantly impact calcium phosphate mineralization. This study used a microfluidic device to show that solution velocity and flow rate, not just laminar flow, substantially affect mineral growth.

Keywords:

Calcium phosphate Microfluidics Mineralization Rheology

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Area of Science:

Geochemistry
Materials Science
Biomineralization

Background:

Mineralization in natural and biological systems occurs in dynamic, flowing solutions, not static environments.
Understanding the influence of fluid flow on mineralization kinetics and mechanisms is crucial for various scientific fields.

Purpose of the Study:

To design and characterize a microfluidic device for controlled study of solution mixing and laminar flow.
To investigate the effect of varying flow conditions (flow rate and velocity) on calcium phosphate mineralization.

Main Methods:

A multi-stream parallel flow microfluidic device was developed for controlled solution mixing.
Quinine protonation was used to measure solution mixing efficiency.
Calcium phosphate mineralization rates were monitored using optical microscopy and Image J software.
Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) characterized the mineral products.

Main Results:

The microfluidic device allowed for controlled manipulation of flow conditions.
Solution velocity and flow rate were found to have a substantial effect on calcium phosphate mineralization.
Mineral products were amorphous, with varying degrees of mineralization potentially linked to supersaturation gradients.

Conclusions:

Flow conditions, specifically solution velocity and flow rate, are critical factors influencing calcium phosphate mineralization.
The developed microfluidic platform provides a valuable tool for studying mineralization under biologically relevant flow conditions.
This research enhances our understanding of mineralization processes in dynamic environments.