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Related Concept Videos

The Thermodynamics of Mixing01:28

The Thermodynamics of Mixing

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Mixing is a fascinating phenomenon in thermodynamics, particularly when considering the Gibbs energy of a mixture at constant temperature and pressure. This energy, denoted as G, tends to decrease during spontaneous mixing processes, offering insights into the composition changes that occur.Imagine two ideal gases, initially separated in different containers, with amounts nA and nB, respectively, both at a temperature T and pressure p. The chemical potentials of these gases have their 'pure'...
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Mixing Concrete01:30

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Concrete mixing ensures a homogenous blend where aggregates are well-coated with cement paste. Concrete mixing is typically done using two main types of mixers: batch and continuous. Batch mixers handle one batch at a time, thoroughly combining materials before discharging and receiving the next batch. In contrast, continuous mixers receive a steady flow of ingredients, mixing them consistently and discharging without interruption. Within batch mixers, tilting drum mixers mix with internal...
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Carrier-Mediated Transport01:06

Carrier-Mediated Transport

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Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
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Active Transport01:14

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Active transport is a critical biological process that allows cells to move solutes against an electrochemical gradient. This process requires direct energy input and is characterized by its selectivity, saturability, and susceptibility to competitive inhibition.
Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...
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Mixing Time01:19

Mixing Time

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The concept of mixing time is significant in producing a uniform concrete mix with the required strength. The mixing period starts once all components are in the mixer. Initially, the mixer is charged with 10% of the water, followed by the consistent addition of solids and then 80% of the water. The remaining water is added later, within the first quarter of the mixing period. The minimum mixing time varies according to the mixer's capacity; for example, mixers with up to 1 cubic yard...
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Pore Transport and Ion-Pair Transport01:17

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Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited  but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
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Quantifying Mixing using Magnetic Resonance Imaging
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Published on: January 25, 2012

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Mixing and Transport.

Chein-Chi Chang1, Tom Chapman, Zhanfeng Dong

  • 1College of Environmental Science and Engineering. Guilin University of Technology, Guilin 541004, China.

Water Environment Research : a Research Publication of the Water Environment Federation
|October 1, 2015
PubMed
Summary
This summary is machine-generated.

This review summarizes 2014 research on mixing and transport processes, including anaerobic digester mixing, heat transfer mixing, and environmental fate and transport.

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Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Fluid Dynamics

Background:

  • Mixing and transport processes are crucial in various environmental and engineering applications.
  • Understanding these processes is key to optimizing system performance and predicting environmental impacts.

Purpose of the Study:

  • To review and synthesize research published in 2014 concerning mixing and transport phenomena.
  • To cover key areas including anaerobic digestion, heat transfer, and environmental fate and transport.

Main Methods:

  • Literature review of scientific publications from the calendar year 2014.
  • Categorization of research based on specific applications: anaerobic digester mixing, heat transfer mixing, and environmental fate and transport.

Main Results:

  • Compilation of studies focusing on the dynamics of mixing in anaerobic digesters.
  • Summary of research advancements in heat transfer mixing mechanisms.
  • Overview of findings related to environmental fate and transport processes.

Conclusions:

  • The 2014 literature highlights significant advancements in understanding mixing and transport.
  • Further research is needed to fully elucidate complex interactions in these domains.