Gamma radiation effects on molecular characteristic of vegetable tannins
| Autor: | Francisco Heriberto Martínez Luzardo, S. Barroso, F. Guzmán, I. Coto Hernandez, Octavio Rodriguez, F. Garcia Velasco, O. Díaz Rizo |
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| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Decarboxylation Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Pollution High-performance liquid chromatography Analytical Chemistry chemistry.chemical_compound Nuclear Energy and Engineering chemistry visual_art Tannic acid visual_art.visual_art_medium Tannin Molecule Organic chemistry Radiology Nuclear Medicine and imaging Bark sense organs Irradiation Fourier transform infrared spectroscopy skin and connective tissue diseases Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 299:1787-1792 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | The influence of gamma radiation on tannins extracted from Pinus caribaea bark and on tannin acid has been investigated in this study with the aim of searching for evidences of structural and/or conformational changes. To fulfill this purpose, the samples of tannins, such as tannic acid and P. caribaea tannin bark, were irradiated at different doses (from 5 to 35 kGy) using a cobalt-60 gamma irradiator. The changes were analyzed by a Fourier transform infrared spectrometry and by high resolution liquid chromatography. The results pointed out some structural and conformational changes under the effects of gamma radiation for doses higher than 5 kGy for P. caribaea tannin bark. However, no changes were detected on the irradiated tannic acid. The observed behavior suggests the loss of carbonyl groups. This could be associated to a decarboxylation process with the corresponding release of CO2 from the molecule. Evidences of some conformational changes were also noted. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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