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Related Concept Videos

Classification of Skeletal Muscle Fibers01:48

Classification of Skeletal Muscle Fibers

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Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
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Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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Isomerism in Complexes
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Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
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Microfluidics in structured multimaterial fibers.

Rodger Yuan1, Jaemyon Lee2,3,4, Hao-Wei Su2,3,4

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.

Proceedings of the National Academy of Sciences of the United States of America
|October 31, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces fiber microfluidics, a novel fabrication method for creating microfluidic channels with complex cross-sections. This technique enables advanced control over fluid dynamics and material integration for new microfluidic applications.

Keywords:
dielectrophoresisfabricationfibersinterial focusingmicrofluidics

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Area of Science:

  • Microfluidics
  • Materials Science
  • Biotechnology

Background:

  • Traditional microfluidic devices use planar chip formats, limiting control over microchannel geometry and material placement.
  • This limitation restricts the design of flow fields and the application of external forces (e.g., electric, magnetic) in microfluidic systems.

Purpose of the Study:

  • To develop a novel method for fabricating microfluidic channels with complex, non-rectangular cross-sections.
  • To enable greater design freedom in microfluidic devices beyond traditional planar techniques.

Main Methods:

  • A thermal drawing process is used to dimensionally reduce scaled-up microchannel designs.
  • Compatible materials are co-drawn to integrate conductive domains along channel walls.
  • Fabrication of meter-long microfluidic fibers with various cross-sectional shapes (crosses, stars, crescents).

Main Results:

  • Successfully fabricated microfluidic fibers with complex cross-sections and integrated conductive domains.
  • Demonstrated unexplored regimes in hydrodynamic flow using the new fiber microfluidic technology.
  • Designed and validated a high-throughput cell separation device based on this method.

Conclusions:

  • Fiber microfluidics offers unprecedented control over microchannel design and material integration.
  • This technology opens new possibilities for microfluidic applications inaccessible with planar fabrication.
  • Enables the creation of novel microfluidic devices for advanced research and applications.