Study of keratin hair of domestic cat under methionine and cystine experimental diet using FT-Raman spectroscopy
| Autor: | Camilla Yara Langer Ogawa, Francielle Sato, M. Sandrini, A.N. Medina, Ricardo Souza Vasconcellos, Joyce Sato |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Methionine integumentary system 010401 analytical chemistry Cystine Context (language use) macromolecular substances 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences symbols.namesake chemistry.chemical_compound medicine.anatomical_structure chemistry Biochemistry Keratin symbols Nail (anatomy) medicine 0210 nano-technology Raman spectroscopy Spectroscopy Cysteine |
| Zdroj: | Vibrational Spectroscopy. 100:1-5 |
| ISSN: | 0924-2031 |
| Popis: | FT-Raman spectroscopy has been extensively used to study human keratotic biopolymers, such as skin, nail and hair, since the disulfide bonds of keratin protein is Raman-active vibrational mode. In this context, animal hair can also be evaluated by Raman spectroscopy, for the main protein is keratin. In this study, domestic cats were submitted to an experimental diet with different levels of methionine and cysteine; then their hair was evaluated by using FT-Raman spectroscopy on the first and on the last day of the diets. The results were compared with tensile rupture measurements. They showed that FT-Raman spectroscopy was able to monitor disulfide bonds (510 cm−1) and keratin protein conformation (amide I) in different sulfur amino acids levels, indicating that the levels above the minimum recommended were not efficient to improve the hair quality. |
| Databáze: | OpenAIRE |
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