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Related Concept Videos

Bioreactor Design and Operational System01:29

Bioreactor Design and Operational System

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Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...
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Bioreactor Controls-I01:28

Bioreactor Controls-I

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Maintaining optimal conditions within fermenters is essential for maximizing microbial productivity and ensuring process efficiency. This lesson focuses on key parameters—temperature, foam, pH, carbon dioxide, oxygen, and pressure—and their precise measurement and control strategies in fermentation systems.Temperature ControlTemperature regulation is critical due to the exothermic nature of many fermentation processes. In small laboratory fermenters, temperature is commonly...
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Related Experiment Video

Updated: May 3, 2026

Engineering Biological-Based Vascular Grafts Using a Pulsatile Bioreactor
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A Multiaxial Bioreactor Integrated with an Environmental Monitoring System for Tissue-Engineered Skin Grafts.

Seunggyu Jeon1,2, Po-Feng Lee1, Adit Mehta1

  • 1Wake Forest Institute For Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA.

Advanced Healthcare Materials
|January 7, 2026
PubMed
Summary

A novel multiaxial bioreactor system offers uniform skin graft stretching and continuous environmental monitoring, enhancing tissue maturation for chronic wound treatments. This technology advances regenerative medicine applications.

Keywords:
bioreactorenvironmental monitoringregenerative medicineskin grafttissue engineering

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Area of Science:

  • Regenerative Medicine
  • Biomedical Engineering
  • Tissue Engineering

Background:

  • Tissue-engineered skin grafts show promise for chronic wounds.
  • Conventional skin bioreactors have limitations in uniform stretching and maturity monitoring.
  • Uneven tissue maturation is a challenge in current skin graft preconditioning.

Purpose of the Study:

  • To introduce a novel multiaxial bioreactor for uniform skin graft stretching.
  • To incorporate continuous environmental monitoring capabilities into the bioreactor.
  • To demonstrate enhanced skin tissue maturation using multiaxial mechanical stimulation.

Main Methods:

  • Developed a multiaxial bioreactor using a Hoberman ring design for radial force application.
  • Implemented integrated sensors for continuous monitoring of pH, dissolved oxygen, glucose, lactate, and media level.
  • Applied cyclic multiaxial stretching to skin grafts and assessed cellular distribution, orientation, and proliferation.

Main Results:

  • Achieved uniform cellular distribution and orientation in stretched skin grafts.
  • Verified user-controlled strain through surface area expansion measurements.
  • Demonstrated enhanced dermal fibroblast proliferation and improved epidermal keratinocyte integrity.

Conclusions:

  • The novel multiaxial bioreactor provides uniform stretching and environmental monitoring for skin grafts.
  • Cyclic multiaxial stretching effectively induces skin tissue maturation.
  • This bioreactor platform simplifies and strengthens regenerative medicine applications for wound healing.