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Organosolv Ethanol Lignin from Hybrid Poplar as a Radical Scavenger: Relationship between Lignin Structure, Extraction Conditions, and Antioxidant Activity
Abstract
Twenty-one organosolv ethanol lignin samples were prepared from hybrid poplar (Populus nigra xP. maximowiczii) under varied conditions with an experimental matrix designed using response surface methodology (RSM). The lignin preparations were evaluated as potential antioxidants. Results indicated that the lignins with more phenolic hydroxyl groups, less aliphatic hydroxyl groups, low molecular weight, and narrow polydispersity showed high antioxidant activity. Processing conditions affected the functional groups and molecular weight of the extracted organosolv ethanol lignins, and consequently influenced the antioxidant activity of the lignins. In general, the lignins prepared at elevated temperature, longer reaction time, increased catalyst, and diluted ethanol showed high antioxidant activity. Regression models were developed to enable the quantitative prediction of lignin characteristics and antioxidant activity based on the processing conditions.
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Metadata
- Authors
- Pan, X., Kadla, J. F., Ehara, K., Gilkes, N., & Saddler, J. N.
- Venue
- Journal of Agricultural and Food Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-07-07
- Volume
- 54
- Issue
- 16
- Pages
- 5806-5813
- ISSN
- 0021-8561 (ISSN-L)
- 1520-5118
- OpenAlex
- W2068880713
- Cited by
- 680
- References
- 0
- FWCI
- 5.85
- Type
- journal article
- Language
- en
- Open access
- closed
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