Analysis of the functional group composition of the spruce and birch phloem lignin

Faleva, Anna V.; Belesov, A. V.; Kozhevnikov, A. Yu.; Falev, Danil I.; Чухчин, Д. Г.; Новожилов, Е. В.

doi:10.1016/j.ijbiomac.2020.10.248

Cited by 29 publications

(20 citation statements)

References 40 publications

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“…An alternative to such hindrance is to perform a quantitative analysis of lignin functional groups by 31 P‐NMR spectroscopy after their derivatization with a phosphorus‐containing reagent, such as 2‐chloro‐4,4,5,5‐tetramethyl‐1,3,2‐dioxaphospholane. This derivative agent, by reacting only with free OH units, enables their quantitative evaluation, as well as the discrimination of the different phenolic moieties in the sample 39 . The usefulness of such a technique was recently highlighted by Savy et al ., 31 who employed it to delineate a structure–activity relationship for various water‐soluble lignins towards maize ( Zea mays L.) early growth.…”

Section: Resultsmentioning

confidence: 99%

“…This derivative agent, by reacting only with free OH units, enables their quantitative evaluation, as well as the discrimination of the different phenolic moieties in the sample. 39 The usefulness of such a technique was recently highlighted by Savy et al, 31 who employed it to delineate a structure-activity relationship for various water-soluble lignins towards maize (Zea mays L.) early growth. The authors showed that both guaiacyl and p-hydroxyl units positively affected root development, whereas negative relationships were noted for carboxyl moieties.…”

Section: (C))mentioning

confidence: 99%

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Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

et al. 2021

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BACKGROUND Developing eco‐friendly antioxidant and antimicrobial substances originating from biomass residues has recently attracted considerable interest. In this study, two lignosulfonates and various oxidized water‐soluble lignins were investigated for their antioxidant properties, as assessed by ABTS, DPPH and Folin–Ciocalteu methods, and their antimicrobial activity against some bacterial strains responsible for human pathologies. RESULTS The lignosulfonates showed the largest antiradical/antimicrobial capacity, whereas the other substrates were less effective. The observed antioxidant/antibacterial properties were positively correlated with lignin aromatic/phenolic content. The positive correlation between antiradical and antimicrobial activities suggests that lignin scavenging capacity was also involved in its antibacterial activity. A greater antimicrobial performance was generally observed against Gram‐positive bacterial strains, and it was attributed to the intrinsic larger susceptibility of Gram‐positive bacteria to lignin phenols. A significant though lesser inhibitory activity was also found against Escherichia coli. CONCLUSION Our results confirmed the dependence of lignin antioxidant/antibacterial power on its extraction method and chemical structure, as well as on the type of bacterial strains. Identifying the relationship between lignin molecular composition and its antioxidant/antibacterial features represents an advance on the potential future use of renewable and eco‐compatible lignin materials in nutraceutical, pharmaceutical and cosmetic sectors. © 2021 Society of Chemical Industry.

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Section: Resultsmentioning

confidence: 99%

Section: (C))mentioning

confidence: 99%

Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

et al. 2021

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“…There are two phenomena to take into account, the first is the intensity of the peaks at the regions mentioned above, and the second is the difference in the absorption wavelengths, as absorption at a longer wavelength (bathochromic shift) may be due to the effect of an increased degree of conjugation (Faleva et al, 2021). In kraft lignin, the higher intensities are those of K1, both in non-conjugated peaks (λ1 and λ2) and in the conjugated peak (λ 5 ).…”

Section: Conjugated and Non-conjugated Oh Groupsmentioning

confidence: 99%

Fine-tune of lignin properties by its fractionation with a sequential organic solvent extraction

Izaguirre

Robles

Llano‐Ponte

et al. 2022

Industrial Crops and Products

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In this work, different lignins were obtained from two different extraction methods (kraft and organosolv) but from the same raw material (Eucalyptus globulus sp.). They were subsequently fractionated to determine the differences of each extraction method and their corresponding physicochemical properties found in fractionation sequence and obtained fractions. The goal of the fractionation was to obtain lignin fractions with narrower molecular weight distribution and lower polydispersity index (PI). The solvent sequence was designed based on the environmental friendly properties, health and safety assessments of the selected organic solvents: (methanol (MeOH), ethanol (EtOH), propan-2-one (DMK), ethyl acetate (EtOAc), propan-1-ol (nPrOH), propan-2-ol (iPrOH), butan-2-one (MEK), and butan-1-ol (tBuOH)). The different fractions obtained were characterised to determine their chemical structure by several analytical techniques, such as Fourier Transformed Infrared Spectroscopy (FTIR), Ultraviolet (UV), Phosphorus-31 Nuclear Magnetic Resonance ( 31 P NMR), Pyrolysis-Gas Chromatography/Mass Spectrometry (Py-GC/MS), Thermogravimetric analysis (TGA), and Differential scanning calorimetry (DSC). In addition, Gel Permeation Chromatography (GPC) was used to obtain the molecular weight distribution. This study showed an effective method for obtaining homogeneous lignins with specific structures and properties depending on the solvent and molecular weight attained. Moreover, the method designed was found to be effective regardless of the lignin extraction process employed; besides, various lignin fractions were obtained which were different from each other, having specific target applications depending on their structure and chemical properties, ranging from small molecules with abundant reactive sites to act as active materials or copolymer reagents for many applications, to larger and more inactive molecules with higher thermal resistivity.

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“…Moreover, due to the diffuse-porous structure of birch wood the quality of wood products is not affected by the ring width, and its processing and finishing is easy [14]. At the same time, silver birch has higher share of lignin in wood than Norway spruce [56]. Silver birch produces good quality hardwood pulp and veneer, and for these purposes it is used in Northern Europe and North America [19,57].…”

Section: Wood Production Aspectsmentioning

confidence: 99%

Young Silver Birch Grows Faster and Allocates Higher Portion of Biomass into Stem Than Norway Spruce, a Case Study from a Post-Disturbance Forest

Konôpka

Pajtík

Šebeň

et al. 2021

Forests

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The aim of the paper was to compare young silver birch (Betula pendula Roth.) and Norway spruce (Picea abies L. Karst) growing at the identical site, from the point of contribution of tree components to their aboveground biomass stock, their wood density, radial increment and aboveground biomass production. Our research activities were performed in the High Tatra Mts., which belong to the Tatra National Park (TANAP), Northern Slovakia. Currently, the substantial part of the TANAP territory is covered by post-disturbance young forests which have been growing there since the large-scale windstorm episode in November 2004. Our study combined non-destructive repeated tree measurements performed at two transects in 2016–2020, with destructive tree sampling of twenty 14-year-old individuals for each species. From the gathered data, we derived models estimating standing stock and annual production of aboveground biomass in individual tree components (foliage, branches, stem bark and stem wood), using diameter at breast height (DBH) as a predictor. The results showed contrasting contributions of tree compartments to aboveground biomass stock between birch and spruce. While spruce trees had four times higher contribution of foliage than birches, the reverse situation (1.5-fold difference) was observed for stem over bark biomass. At the same time, birch trees had a 40% greater diameter increment and a 30% denser stem wood than spruce. As for aboveground biomass production, the contribution of the stem as an economically important component was greater in birch than spruce. The results suggest that, in the young growth stage, birch may be advantageous over spruce in both ecological and production properties. Therefore, we believe that strengthening research activities focused on birch ecology and production issues would bring practical recommendations for better utilization of this tree species in forestry and wood-processing industry sectors

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Analysis of the functional group composition of the spruce and birch phloem lignin

Cited by 29 publications

References 40 publications

Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

Valorization of lignins from energy crops and agro‐industrial byproducts as antioxidant and antibacterial materials

Fine-tune of lignin properties by its fractionation with a sequential organic solvent extraction

Young Silver Birch Grows Faster and Allocates Higher Portion of Biomass into Stem Than Norway Spruce, a Case Study from a Post-Disturbance Forest

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