Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Three D structures of chitosan.

Kozo Ogawa1, Toshifumi Yui, Kenji Okuyama

  • 1Research Institute for Advanced Science and Technology (RIAST), Osaka Prefecture University, Sakai, Osaka 599-8570, Japan. kozo@riast.osakafu-u.ac.jp

International Journal of Biological Macromolecules
|June 5, 2004
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Guest molecule diffusion in the chitosan-ZnCl<sub>2</sub> complex crystal: A molecular dynamics simulation study.

International journal of biological macromolecules·2026
Same author

Free-Energy Changes of a Single Molecular Chain Peeling off from the Surface of the Native Cellulose Crystal Model in Various Solvents.

The journal of physical chemistry. B·2026
Same author

Unbiased picture of the ligand docking process for the hevein protein-oligosaccharide complex.

Scientific reports·2025
Same author

Extended Ensemble Molecular Dynamics Study of Ammonia-Cellulose I Complex Crystal Models: Free-Energy Landscape and Atomistic Pictures of Ammonia Diffusion in the Crystalline Phase.

Journal of chemical information and modeling·2023
Same author

Nanocellulose enriches enantiomers in asymmetric aldol reactions.

RSC advances·2022
Same author

Molecular and Crystal Structure of a Chitosan-Zinc Chloride Complex.

Nanomaterials (Basel, Switzerland)·2021

Chitosan exhibits diverse molecular conformations, including the stable Type I helix found in hydrated and anhydrous forms. Different chitosan-acid salts reveal new helical structures, highlighting chitosan

Area of Science:

  • Biopolymer Science
  • Materials Science
  • Crystallography

Background:

  • Chitosan, a versatile biopolymer, exists in various crystalline forms.
  • Understanding chitosan's molecular conformation is crucial for its applications.
  • Previous studies identified specific helical structures in chitosan crystals.

Purpose of the Study:

  • To elucidate the diverse crystalline conformations of chitosan.
  • To investigate the structural changes of chitosan in different acid salts.
  • To correlate chitosan conformation with its molecular environment and stability.

Main Methods:

  • X-ray crystallography was employed to determine the crystal structures of chitosan polymorphs.
  • Analysis of chitosan-acid salts provided insights into alternative conformations.

Related Experiment Videos

  • Solid-state Nuclear Magnetic Resonance (NMR) was used to suggest conformations in specific salts.

    • Main Results:

    • Two polymorphs (tendon and annealed) exhibit a Type I extended two-fold helix.
    • Chitosan-acid salts reveal three additional conformations: Type II relaxed two-fold helix, a 4/1 helix, and a 5/3 helix.
    • The Type II conformation, lacking strong intramolecular hydrogen bonds, appears less stable and can transform into the annealed polymorph.

    Conclusions:

    • Chitosan displays a range of helical conformations dependent on its crystalline state and interactions with acids.
    • The Type I conformation is a stable, intramolecularly hydrogen-bonded structure.
    • Chitosan's structural versatility is demonstrated through its various helical forms in different salt environments.