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Type: Artigo de periódico
Title: Using The Ft-ir Linear Dichroism Method For Molecular Order Determination Of Tendon Collagen Bundles And Nylon 6.
Author: Vidal, Benedicto de Campos
Abstract: Polarized Fourier transform-infrared (FT-IR) was used to compare the orientation of vibrational chemical groups of bovine tendon collagen bundles (CBs) to that of nylon 6, a simpler polyamide model, in terms of linear dichroism (LD). Subtraction of spectral profiles identified the most significant differences regarding the amide regions. At 1630cm(-1), the CBs displayed higher peak areas and absorbance when positioned perpendicularly (A⊥) to the plane of polarized light, in comparison with nylon 6. In contrast, at the 1526cm(-1) amide II spectral region the inverse occurred. In the amide III region (1232cm(-1)), the LD was positive and higher for CBs. Dichroic ratios (DR=A||/A⊥) calculated from the average of ten measured spectra for CBs and nylon 6 revealed that the values for CBs were <1.0 in the 3298-1655cm(-1) wavenumber range and >1.0 in the 1536-1234cm(-1) wavenumber range. From 1535 to 1120cm(-1), nylon 6 displayed DR values higher than those of CBs. The LD band integrated areas were higher in CBs than in nylon 6. The LD differences between CBs and nylon 6 are probably due to a more complex chemical composition and supramolecular oriented architecture in CBs in comparison to nylon 6.
Subject: Animals
Biomimetic Materials
Molecular Conformation
Spectroscopy, Fourier Transform Infrared
Collagen Bundles
Linear Dichroism
Nylon 6
Citation: Acta Histochemica. v. 115, n. 7, p. 686-91, 2013-Sep.
Rights: fechado
Identifier DOI: 10.1016/j.acthis.2013.02.002
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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