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Related Concept Videos

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

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Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
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Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich...
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Membrane Fluidity

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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
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The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
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Numerical Modeling in Membrane Processes.

Sébastien Déon1, Patrick Dutournié2

  • 1Institut UTINAM (UMR CNRS 6213), Université de Bourgogne Franche-Comté, 16 Route de Gray, CEDEX, 25030 Besançon, France.

Membranes
|November 11, 2022
PubMed
Summary
This summary is machine-generated.

Membrane processes offer powerful solutions for water treatment, effectively removing contaminants and concentrating valuable compounds. These advanced techniques are crucial for sustainable water management and resource recovery.

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Area of Science:

  • Environmental Science
  • Chemical Engineering

Background:

  • Membrane processes are vital for water treatment, addressing both contaminant removal and resource concentration.
  • Applications include purifying water streams and recovering high-value compounds from industrial effluents.

Discussion:

  • The efficiency of membrane processes in separating diverse contaminants is highlighted.
  • Potential for concentrating valuable compounds in retentate streams is a key economic driver.

Key Insights:

  • Membrane technology offers a versatile approach to water purification and resource recovery.
  • Effective removal of organic and mineral contaminants is demonstrated.

Outlook:

  • Further research can optimize membrane performance for enhanced water treatment and resource valorization.
  • Expanding applications of membrane processes in circular economy initiatives are anticipated.