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Related Concept Videos

Fibrous Proteins00:55

Fibrous Proteins

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...
Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

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...
Globular and Fibrous Proteins02:21

Globular and Fibrous Proteins

Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
Globular and Fibrous Proteins02:21

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Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
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Connective Tissue Fibers and Ground Substance01:17

Connective Tissue Fibers and Ground Substance

One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. It plays a significant role in the functioning of this tissue. The major component of the matrix is a...
The Structure of Intermediate Filaments01:19

The Structure of Intermediate Filaments

The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm).  These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate filaments...

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Updated: May 14, 2026

Procedure for Fabricating Biofunctional Nanofibers
09:39

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Published on: September 10, 2012

Fiber: composition, structures, and functional properties.

Ian M Sims1, John A Monro

  • 1Industrial Research Limited, Lower Hutt, New Zealand.

Advances in Food and Nutrition Research
|February 12, 2013
PubMed
Summary
This summary is machine-generated.

Kiwifruit fiber, composed of pectic polysaccharides, hemicelluloses, and cellulose, maintains its structure and hydration through foregut digestion. Hindgut fermentation occurs, with potential benefits enhanced by consumption alongside other fiber sources.

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Area of Science:

  • Plant Cell Wall Biology
  • Dietary Fiber Research
  • Gastrointestinal Digestion

Background:

  • Kiwifruit dietary fiber comprises pectic polysaccharides, hemicelluloses, and cellulose.
  • These components are typical of dicotyledonous fruit cell walls.
  • Specific structures include homogalacturonans, rhamnogalacturonans, xyloglucan, and xylan.

Purpose of the Study:

  • To investigate the structural and functional stability of kiwifruit fiber during in vitro digestion.
  • To determine the impact of foregut digestion on kiwifruit fiber's hydration properties.
  • To explore the fermentation and potential hindgut effects of kiwifruit fiber, especially in conjunction with other fibers.

Main Methods:

  • In vitro digestion models simulating gastric and small intestinal conditions.
  • Analysis of cell-wall polysaccharide composition.
  • Assessment of hydration properties (swelling and water retention capacity).
  • Evaluation of hindgut fermentation and displacement effects.

Main Results:

  • Kiwifruit fiber composition (pectic polysaccharides, hemicelluloses, cellulose) remained largely unchanged after in vitro foregut digestion.
  • Hydration properties (swelling, water retention) were unaffected by foregut digestion.
  • Kiwifruit fiber undergoes fermentation in the hindgut.
  • Consumption with slowly fermented fiber displaced fermentation distally in the hindgut.

Conclusions:

  • Kiwifruit fiber's functional properties are preserved during foregut digestion.
  • Hindgut fermentation of kiwifruit fiber occurs.
  • Interactions with other dietary fibers may modulate the hindgut benefits of kiwifruit.