Study on the structure and properties of wool keratin regenerated from formic acid

Study on the structure and properties of wool keratin regenerated from formic acid Structural characteristics of keratin regenerated from water (KW) and from formic (KF) acid solutions were compared. Amino acid composition and molecular weight distribution of KW and KF samples were studied by high performance liquid chromatography (HPLC) and SDS-PAGE electrophoresis. Turbidity measurement showed that keratin dissolved in formic acid forms transparent and stable solutions and no flocculation occurs. In addition, because of its good solvation properties, studied by viscosity measurements, formic acid can be used as a co-solvent to prepare keratin-based blend solutions. Structural studies carried out by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and near infrared (NIR) suggest that formic acid stabilizes the β-sheet structure. Thermogravimetric analysis (TGA) reveals a higher thermal stability of keratin regenerated from formic acid with respect to keratin regenerated from water. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Biological Macromolecules Elsevier

Study on the structure and properties of wool keratin regenerated from formic acid

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Publisher
Elsevier
Copyright
Copyright © 2007 Elsevier B.V.
ISSN
0141-8130
D.O.I.
10.1016/j.ijbiomac.2007.03.002
Publisher site
See Article on Publisher Site

Abstract

Structural characteristics of keratin regenerated from water (KW) and from formic (KF) acid solutions were compared. Amino acid composition and molecular weight distribution of KW and KF samples were studied by high performance liquid chromatography (HPLC) and SDS-PAGE electrophoresis. Turbidity measurement showed that keratin dissolved in formic acid forms transparent and stable solutions and no flocculation occurs. In addition, because of its good solvation properties, studied by viscosity measurements, formic acid can be used as a co-solvent to prepare keratin-based blend solutions. Structural studies carried out by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and near infrared (NIR) suggest that formic acid stabilizes the β-sheet structure. Thermogravimetric analysis (TGA) reveals a higher thermal stability of keratin regenerated from formic acid with respect to keratin regenerated from water.

Journal

International Journal of Biological MacromoleculesElsevier

Published: Aug 1, 2007

References

  • Biomaterials
    Katoh, K.; Shibayama, M.; Tanabe, T.; Yamauchi, K.

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