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Related Concept Videos

Excess Pressure Inside a Drop and a Bubble01:13

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The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
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ATP Driven Pumps III: V-type Pumps01:30

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V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
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ATP Driven Pumps II: P-type Pumps01:34

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The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
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Pumped Concrete01:13

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Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
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Refrigerators and Heat Pumps01:07

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Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
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ATP Driven Pumps I: An Overview01:27

ATP Driven Pumps I: An Overview

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ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
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Related Experiment Video

Updated: Feb 1, 2026

Development of a Benchtop Model for Evaluating the Compatibility of Wound Dressing Materials with Negative Pressure Wound Therapy Systems
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Development of a Benchtop Model for Evaluating the Compatibility of Wound Dressing Materials with Negative Pressure Wound Therapy Systems

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A Self-Pumping Dressing for Draining Excessive Biofluid around Wounds.

Lianxin Shi1,2, Xi Liu1,2, Wenshuo Wang1,2

  • 1CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing, 100190, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|December 12, 2018
PubMed
Summary

A novel self-pumping wound dressing effectively drains excess biofluid, preventing infection and accelerating healing. This innovative dressing technology shows promise for advanced clinical wound care.

Keywords:
electrospinninghydrophilic-hydrophobic Janus materialsself-pumpingunidirectional drainingwound dressings

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Wound Healing Technologies

Background:

  • Excessive wound biofluid accumulation impedes healing and increases infection risk.
  • Conventional dressings often retain fluid, exacerbating the problem.
  • There is a need for advanced wound dressings that actively manage exudate.

Purpose of the Study:

  • To develop and evaluate a novel self-pumping wound dressing capable of unidirectional fluid drainage.
  • To investigate the efficacy of the self-pumping dressing in accelerating wound healing compared to conventional methods.

Main Methods:

  • Fabrication of a composite dressing via electrospinning a hydrophobic nanofiber array onto a hydrophilic microfiber network.
  • Demonstration of unidirectional biofluid drainage mechanism.
  • In vivo testing on murine dorsum wound models to assess healing rates.

Main Results:

  • The self-pumping dressing successfully achieved unidirectional drainage of excessive biofluid from wounds.
  • Wounds treated with the self-pumping dressing exhibited accelerated healing compared to controls.
  • The dressing prevented rewetting of the wound by the drained biofluid.

Conclusions:

  • The developed self-pumping dressing offers a unique solution for managing wound exudate.
  • This technology has significant potential as a next-generation wound dressing for clinical applications.
  • Active fluid management by dressings can substantially improve wound healing outcomes.