Comparative antioxidant and cytotoxic effects of lignins from different sources

Ugartondo, Vanessa; Mitjans, Montserrat; Vinardell, M. Pilar

doi:10.1016/j.biortech.2007.11.038

Cited by 296 publications

(181 citation statements)

References 19 publications

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“…Due to their aromatic structure and the occurrence of phenol residues, lignins have multiple functionalities, being able to act as compatibilizers [5], plasticizers [6], hydrophobizing agents [7,8], flame retardants [9] or optical modifiers [10] or stabilizers [11]. Furthermore, properties potentially interesting in high value applications, such as antimicrobial activity [12] or cytotoxic effects [13] have been shown. The antioxidant properties of lignins stem from their radical scavenging capacity [13][14][15][16][17], following the general mechanism of monomeric phenols.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, properties potentially interesting in high value applications, such as antimicrobial activity [12] or cytotoxic effects [13] have been shown. The antioxidant properties of lignins stem from their radical scavenging capacity [13][14][15][16][17], following the general mechanism of monomeric phenols. The hindered phenolic hydroxyl groups being part of the lignin structure act as proton donors and are able to stabilize the radical in the quinone resonance structure [16].…”

Section: Introductionmentioning

confidence: 99%

“…Radical scavenging activity is described for a large number of lignin sources, ranging form black liquors [18] to the description of different botanic sources such as miscanthus [19], oak chips [20], bamboo [21] and many others. In general, radical scavenging activity of lignin is negatively influenced by increasing heterogeneity, dispersity, molecular weight average and carbohydrate admixtures [13,15,16]. Lignins extracted in sodium hydroxide aqueous medium (alkali lignins) have been shown to have higher activity than other types of lignins, such as lignosulfonates, Kraft, or steam explosion lignin, with a radical scavenging activity similar to that of epicatechin, used as a reference antioxidant [14,17].…”

Section: Introductionmentioning

confidence: 99%

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Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

et al. 2013

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract Due to their polyphenolic structure lignins bear a number of interesting functional properties, such as antioxidant activity. Natural antioxidants are very much looked for in the aim of protection of light or oxygen sensitive goods and are being used in active packaging. Poly(lactide) (PLA)-lignin films were prepared by twin screw extrusion followed by thermo-compression using two different commercial sources of alkali lignins obtained from gramineous plants. A good dispersion of lignin in the matrix was observed. Mechanical properties of the compounded material were merely diminished and oxygen barrier properties slightly enhanced. The chromatographic study of the lignins revealed that the low molecular weight fraction of both lignins increased during the polymer processing. The migration of low molecular weight compounds in an ethanol/water solution simulating fatty foodstuff was performed and the antioxidant activity of the extract was analysed. It was found that the activity increases with increasing severity of the heat treatment because of the generation of free phenolic monomers during processing. These results open an interesting way for application of lignins as an active compound in packaging materials. Lignins do not impair the mechanical and barrier performance of the polymer and the plastics processing even allows for the generation of active substances.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

et al. 2013

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“…Waste wood biomass in form of saw dust can serve as the source of greenhouse free ethanol fuel as a good alternative to petroleum products whose cost of production is higher and also pollutes the air as it burns with smoky flames as well as a good alternative to ethanol produced from starchy Agricultural food stuffs which has been competing with man's food availability [61][62][63][64][65].…”

Section: Resultsmentioning

confidence: 99%

Significance of Ethanol Product of Gmelina arborea

Afe¹

2017

Forest Res

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This work covers the process of making Ethanol from wood dust instead of starchy biomass which could be meant for food or instead of overdependence on hydrocarbon source. The saw dust of Gmelina arborea was collected in a saw mill in Ore, Ondo State, Nigeria and it was used to produce ethanol by hydrolysis and fermentation processes. The density of the wood species was 570 kg/m 3 . The ionic constituents of the ethanol from the wood biomass were analyzed using Fourier Transform Infrared Spectrometric Analyzer (FTIR) and Atomic Absorption Spectrometric Analyzer (AAS). The AAS result shows that the ethanol obtained from the wood species contains transition metals like Copper (Cu), Zinc (Zn), Cadmium (Cd) and Chromium (Cr) while the FTIR results show the presence of ethanol functional groups such as OH, Carbon to carbon single covalent bond which and these are normal components of ethanol in the conventional ethanol.

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“…It has been reported that the DPPH• scavenging activity of lignin could be due to the phenolic hydroxyl groups and molecular weight (Aadil et al 2014). Furthermore, the antioxidant activity and phenolic hydroxyl groups have a positive correlation, and high molecular weight enhances the heterogeneity of lignin, which leads to a decreased free radical scavenging activity (Dizhbite et al 2004;Ugartondo et al 2008). In the experiment, the high DPPH• scavenging activity and low IC50 value of Catalyzed-OL may be ascribed to the high phenolic hydroxyl groups and low molecular weight.…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

Antioxidant Activity of Organosolv Lignin Degraded Using SO42-/ZrO2 as Catalyst

Zhang¹,

Yan²,

Liu³

et al. 2015

BioResources

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Organosolv lignin degradation was carried out through hydrogenolysis routes with SO4 2-/ZrO2 as the catalyst. Structural characterization and antioxidant activity of organosolv lignin samples were investigated; the antioxidant activity of the organosolv lignin was compared with that of soda lignin. Results showed that the active functional groups contents of organosolv lignin were increased, and the antioxidant activity of organosolv lignin was improved. The total hydroxyl and phenolic hydroxyl group contents of organosolv lignin were increased by 15.81% and 26.55%, respectively, and the Mw was decreased from 5739 g/mol to 4499 g/mol. The IC50 of organosolv lignin on DPPH radicals scavenging rate, ABTS + radicals scavenging rate, and reducing power were decreased by 18.91%, 18.08%, and 8.48%, respectively. The catalyzed organosolv lignin can be used as a natural antioxidant for functional food or in cosmetic and polymeric materials.

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Comparative antioxidant and cytotoxic effects of lignins from different sources

Cited by 296 publications

References 19 publications

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

Significance of Ethanol Product of Gmelina arborea

Antioxidant Activity of Organosolv Lignin Degraded Using SO42-/ZrO2 as Catalyst

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