Electron paramagnetic resonance study of hydrogen peroxide/ascorbic acid ratio as initiator redox pair in the inulin-gallic acid molecular grafting reaction
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- 作者：Daniel Arizmendi-Coteroa ; arcoda21@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Rosa Marí ; a Gó ; mez-Espinosab ; rosamarigo@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Octavio Dublá ; n Garcí ; ac ; octavio_dublan@yahoo.com.mx" class="auth_mail" title="E-mail the corresponding author ; Virginia Gó ; mez-Vidalesd ; gomvidal@unam.mx" class="auth_mail" title="E-mail the corresponding author ; Aurelio Dominguez-Lopeza ; adominguezl@uaemex.mx" class="auth_mail" title="E-mail the corresponding author
- 关键词：Inulin ; Molecular grafting ; Phenolic compounds ; Antioxidants ; Electron paramagnetic resonance ; Prebiotics
- 刊名：Carbohydrate Polymers
- 出版年：2016
- 出版时间：20 January 2016
- 年：2016
- 卷：136
- 期：Complete
- 页码：350-357
- 全文大小：1289 K
文摘
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Gallic acid was grafted onto inulin by the H2O2/ascorbic acid redox pair (H2O2/AA).
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The highest grafting rate (30.4 mg GA eq/g IGA) was obtained at 9 M of H2O2/AA.
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The reaction efficiency is related to both components of the H2O2/AA redox pair.
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The EPR study showed that the radical in the inulin is formed on a carbon atom.
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Covalent bond between gallic acid and inulin occurred at the methyl group.