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Related Concept Videos

Adhesion01:14

Adhesion

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Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow...
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Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
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Components of Language01:24

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Language, whether spoken, signed, or written, consists of specific components: lexicon and grammar. The lexicon is the vocabulary of a language, comprising its words. Grammar is the set of rules used to convey meaning through the lexicon. For example, English grammar adds “-ed” to most verbs to indicate past tense. Words are formed by combining phonemes, which are the basic sound units of a language. Different languages have different sets of phonemes (e.g., “ah” vs.
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Related Experiment Video

Updated: Jan 19, 2026

Rat Model of Adhesive Capsulitis of the Shoulder
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Identifying adhesive components in a model tunicate.

Fan Zeng1, Julia Wunderer1, Willi Salvenmoser1

  • 1Department of Evolutionary Developmental Biology, Institute of Zoology, University Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|September 10, 2019
PubMed
Summary
This summary is machine-generated.

Tunicate larvae use unique adhesives for marine attachment. Researchers identified novel sugars and catechols in their glue, revealing new insights into bio-adhesion for potential antifouling applications.

Keywords:
DOPAheparinlarval adhesionlectinspapillaetunicate

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Area of Science:

  • Marine Biology
  • Biochemistry
  • Materials Science

Background:

  • Tunicates are marine invertebrates that attach to substrates using larval adhesives.
  • Understanding tunicate adhesion is crucial for marine shipping and aquaculture industries.
  • Previous work detailed the cellular composition of the Ciona intestinalis adhesive organ.

Purpose of the Study:

  • To investigate the chemical components and properties of tunicate adhesive secretions.
  • To identify factors influencing adhesion and cohesion in Ciona glue.
  • To explore substrate preferences and potential applications of tunicate adhesives.

Main Methods:

  • Screening adhesive secretions for carbohydrate moieties and catechols using lectins.
  • Analyzing substrate properties, including hydrophobicity and charge, for attachment.
  • Investigating the effect of hydrophilic heparin on the settlement process.

Main Results:

  • A distinct set of sugar residues, not found in other marine adhesives, was identified.
  • Catechol residues, likely from adjacent test cells, were detected in the adhesive.
  • Hydrophobicity was found to be a more significant factor than charge in substrate attachment.
  • The addition of hydrophilic heparin influenced the settlement process.

Conclusions:

  • Tunicate adhesive secretions possess unique biochemical properties, including specific sugars and catechols.
  • Substrate hydrophobicity plays a key role in tunicate larval settlement.
  • These findings offer valuable knowledge for designing bio-inspired adhesives and antifouling solutions.