Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1237215 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2010 | 4 Pages |
Abstract
The reaction between p-benzoquinone (PBQ) and casein (protein) in the solid state was studied. After reaction with protein, the FT-IR spectra showed a new band at 1215 cm−1, with an intense sign attributed for casein/PBQ product. An optimum amount of PBQ for determination of the product when mixed with casein was 100 mg and a reaction time of 30 min. The product was stable for a period of 24 h after the reacting by heating. The interaction of PBQ with casein was investigated by FT-IR, reflectance, Raman and EPR spectroscopies. The reaction between PBQ and casein in the solid state yields a radical species (p-benzosemiquinone) that it is stabilized by the presence of p-biphenolate and p-benzoquinone species in the solid state.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Isadora S. Vieira, Dimas A.M. Zaia, Solange P. Balena, Antonio S. Mangrich, Henrique de Santana,