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EnglishIn the present work, the antioxidant activity of lignin obtained from apple tree pruning was studied. Different procedures were used in order to fractionate the raw material and extract the lignin (autohydrolysis, organosolv and soda processes) and several operation conditions, techniques and methodologies were applied (ultrafiltration and differential precipitation). The obtained lignin samples were characterized by ATR-IR spectroscopy and TGA techniques. Further analyses were done in order to determinate main components and total phenolic contents (Folin-Ciocalteau method). The antioxidant activity results (evaluated by ABTS assay) showed that: (1) the lignin obtaining process highly affects this property and (2) that the antiradical behaviour of lignin could reach similar efficiency than two powerful natural antioxidants, gallic acid and catechin, and a commercial one, Trolox®.
| Autori: | |
| Titolo: | Lignin as natural radical scavenger. Study of the antioxidant capacity apple tree pruning lignin obtained by different methods |
| Data di pubblicazione: | 2011 |
| Abstract: | In the present work, the antioxidant activity of lignin obtained from apple tree pruning was studied. Different procedures were used in order to fractionate the raw material and extract the lignin (autohydrolysis, organosolv and soda processes) and several operation conditions, techniques and methodologies were applied (ultrafiltration and differential precipitation). The obtained lignin samples were characterized by ATR-IR spectroscopy and TGA techniques. Further analyses were done in order to determinate main components and total phenolic contents (Folin-Ciocalteau method). The antioxidant activity results (evaluated by ABTS assay) showed that: (1) the lignin obtaining process highly affects this property and (2) that the antiradical behaviour of lignin could reach similar efficiency than two powerful natural antioxidants, gallic acid and catechin, and a commercial one, Trolox®. |
| Lingua: | Inglese |
| Titolo del libro: | Chemical Engineering Transactions 24 |
| Editore: | AIDIC Servizi S.r.l. |
| Nome del convegno: | ICheaP-10 _ 10th International conference on chemical and process engineering |
| Luogo del convegno: | Firenze |
| Data inizio evento: | 2011-05-08 |
| Data fine evento: | 2011-05-10 |
| Tipo di contributo: | Paper |
| Citazione: | Araceli, G., Amendola, D., Gonzalez, M., Spigno, G., Labidi, J., Lignin as natural radical scavenger. Study of the antioxidant capacity apple tree pruning lignin obtained by different methods, Paper, in Chemical Engineering Transactions 24, (Firenze, 08-10 May 2011), AIDIC Servizi S.r.l., Milano 2011: 925-930 [http://hdl.handle.net/10807/5670] |
| Appare nelle tipologie: | Paper, Selected paper, Contributed paper, Working paper, Poster, Poster paper, Comunicazione, Relazione (in volume) |
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