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Related Concept Videos

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Fibrous Proteins

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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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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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Skeletal muscles comprise various fibers, each with distinct characteristics and roles in movement and stability. They are mainly categorized into three types — fast-twitch, slow-twitch, and intermediate.
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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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Fibril-associated Collagen01:11

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Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
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Related Experiment Video

Updated: Aug 19, 2025

Author Spotlight: Deciphering the Mysteries of Skeletal Muscle Fiber Types Using the MyDoBID Technique
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All Fiber is Not Fiber.

Shahrose Rahman1, Kristin Trone2, Caleb Kelly3

  • 1Department of Surgery, Oregon Health & Science University, Portland, OR, USA. rahmasha@ohsu.edu.

Current Gastroenterology Reports
|December 3, 2022
PubMed
Summary

Dietary fiber offers health benefits through its physiochemical properties and the production of short-chain fatty acids (SCFAs). These SCFAs demonstrate anti-obesity and anti-inflammatory effects, with potential for disease prevention and improved health outcomes.

Keywords:
AcetateButyrateConstipationDietary fiberPropionateShort chain fatty acids

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Area of Science:

  • Nutrition Science
  • Gastroenterology
  • Microbiology

Background:

  • Dietary fiber provides health benefits via physiochemical properties and colonic microbial fermentation.
  • Microbial fermentation produces short-chain fatty acids (SCFAs), which are key mediators of fiber's effects.

Purpose of the Study:

  • To review the physiochemical properties of dietary fiber and their physiological effects.
  • To summarize the health benefits of SCFAs, specifically acetate, propionate, and butyrate.

Main Methods:

  • Literature review focusing on studies of dietary fiber and SCFA health effects.
  • Emphasis on fermentability and SCFA production from dietary fiber.

Main Results:

  • SCFAs exhibit anti-obesity, anti-inflammatory, and potential anti-neoplastic roles at the mucosal level.
  • Evidence from animal and human studies supports the beneficial effects of SCFAs.

Conclusions:

  • Dietary fiber and its metabolite SCFAs hold significant potential for disease prevention and health improvement.
  • Further research is needed to optimize fiber's use in clinical practice for managing symptoms and preventing disease.