Ready chemical conversion of acid hydrolysis lignin into water-soluble lignosulfonate III: Successive treatment of acid hydrolysis lignin and a lignin model compound by phenolation and arylsulfonation*

Yasuda, Seiichi; Hamaguchi, E.; Asano, Kyoko

doi:10.1007/bf01177733

Cited by 35 publications

(26 citation statements)

References 2 publications

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“…The S/G ratio of the ReLignin gently increased (Table 4) because the acid pretreatment might led to degradation of the β-O-4 linkages and released more syringyl units than guaiacyl units. Yasuda et al [34] reported that the acid treatment induced a shift toward higher molecular weight distribution of the Kraft lignin because carbon-carbon linkages formed during the acid treatment were favorably substituted by hydroxyl groups.…”

Section: Phenolic Aromatic Compounds From Pyrolysis Of Different Lignmentioning

confidence: 98%

Pyrolytic production of phenolic compounds from the lignin residues of bioethanol processes

Jung

Woo

Lim

et al. 2015

Chemical Engineering Journal

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Section: Phenolic Aromatic Compounds From Pyrolysis Of Different Lignmentioning

confidence: 98%

Pyrolytic production of phenolic compounds from the lignin residues of bioethanol processes

Jung

Woo

Lim

et al. 2015

Chemical Engineering Journal

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“…The signals peaking at 56 and 71 ppm suggest that aromatic moieties have a high content of N-alkyl and O-alkyl carbons (Adani et al 2006). The main contributions giving rise to 1 H resonance signals at 3.75-3.92 ppm are likely to arise from CHOH and CH 2 OH functional groups which may indicate the presence of methoxyphenylpropyl repeating unit which typically occur in lignin and ligninlike matter (Yasuda et al 1999) and/or the presence of polysaccharides moieties (Adani et al 2006).…”

Section: Thermal Analysismentioning

confidence: 99%

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

et al. 2010

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Digestion of cattle manure collected from a livestock farm together with bedding material (straw) has been studied under mesophilic and thermophilic conditions in batch reactors. The digestion was carried out for a prolonged period with the aim of evaluating the changes undergone by the organic matter. The mesophilic digestion carried out revealed a greater capacity to produce gas and transform organic matter, while a higher conversion rate, but a lower gas yield, was obtained under thermophilic conditions. Degradation of the organic matter was evaluated by means of thermal analysis and (1)H NMR. Stabilisation through anaerobic digestion (either mesophilic or thermophilic) resulted in an increase in the quality of the organic matter, as characterised by an enrichment in thermostable compounds, and an accumulation of long chain aliphatic materials. The experiments performed demonstrated the transformation of organic matter into complex materials under anaerobic conditions with an accumulation of aliphatic components under both types of conditions tested. Degradation through mesophilic digestion, in comparison to the thermophilic process, resulted in a greater destruction of straw particles.

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“…They indicate the presence of repeating units of metylopropyl groups, which are structural units of lignin, and appropriate humic compounds [24]. This signal was not seen in any of the analyzed spectrum, confirming their aliphatic character.…”

Section: Electric Methodsmentioning

confidence: 74%

The Influence of Natural and Model Forms of Humic Acids on the Dynamic Parameters of Model Membranes

Pisarek

Pytel

Filipiak³

et al. 2016

Ecological Chemistry and Engineering S

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Abstract:In this paper the influence of humic acid concentrations extracted from Histosols (HA-A) and their model forms (HA-B) separated from humic substances commercially produced by Carl Roth GmbH + Co.KG on the dynamic properties of liposome membranes was determined. Differences in the quality of the humic acids (HA-A and HA-B) were determined by the 1 HNMR and FTIR methods. Liposomes from the sonication of egg yolk lecithin (EYL) in an aqueous solution and synthetic Dipalmitoylphosphatidylcholine (DPPC) were used. Fluidity of liposome membranes was determined by the EPR technique with spin probes (TEMPO, 16DOIXYL). The electrical parameters of membranes were found using a Keithley 6517 electrometer. Our study showed significant differences in the influence of HA-A and HA-B on the membranes. In the bilayer membranes of the liposomes of HA-A admixture there was slightly more stiffening of the interior of the membrane in comparison to HA-B. A similar effect was observed in the surface layer of the liposome membranes. This difference is particularly evident for DPPC liposomes, however, the EYL liposomes admixture with HA-B slightly increased the fluidity of the surface layer. Electrical study confirmed this effect. The study shows that natural and model forms of humic acids differ in their effects on the activity of tested membrane models. The strong differences in the interaction of HA-A and HA-B on parameter F in DPPC liposomes can be result from the transport of humic acids connected to the metal ions inside the membranes (xenobiotics present in the environment).

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Ready chemical conversion of acid hydrolysis lignin into water-soluble lignosulfonate III: Successive treatment of acid hydrolysis lignin and a lignin model compound by phenolation and arylsulfonation*

Cited by 35 publications

References 2 publications

Pyrolytic production of phenolic compounds from the lignin residues of bioethanol processes

Pyrolytic production of phenolic compounds from the lignin residues of bioethanol processes

Digestion of cattle manure under mesophilic and thermophilic conditions: characterization of organic matter applying thermal analysis and 1H NMR

The Influence of Natural and Model Forms of Humic Acids on the Dynamic Parameters of Model Membranes

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