Lignin bioconversion into valuable products: fractionation, depolymerization, aromatic compound conversion, and bioproduct formation

Li, Mengxing; Wilkins, Mark R.

doi:10.1007/s43393-020-00016-6

Cited by 16 publications

(5 citation statements)

References 227 publications

(303 reference statements)

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“…This peak was slightly reduced to 1577.8 cm -1 after undergoing chemical activation with KOH. The degradation of lignin, which involves aryl ether bonding, would initiate the formation of phenolic components, particularly ferulic acid and p-coumaric acid (Janusz et al 2017;Li and Wilkins 2020). The decrease of lignin provides a good structural effect to the AC as it can increase the structure porosity of the sample (Darmawan et al 2016;Poursorkhabi et al 2020).…”

Section: Bioresourcescommentioning

confidence: 99%

Synthesis and characterization of novel nano-carbon mixture from Dabai (Canarium odontophyllum) nutshell

James

Rahman

Huda

et al. 2022

BioRes

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The nanocarbon-based mixture was shown to be an effective adsorbent for removing dyes and heavy metals from wastewater via adsorption. The goal of this research was to prepare and investigate the properties of a bio-carbon mixture made from Dabai (Canarium odontophyllum) nutshell with the addition of titanium dioxide (TiO2) and montmorillonite (MMT) clay. Fourier transform infrared (FTIR) spectroscopy was used to determine the functional groups of raw carbon and potassium hydroxide (KOH)-activated carbon (AC). The FTIR analysis of the active carbon revealed that the active carbon had more surface chemistry than the non-AC. Scanning electron microscopy (SEM) analysis was used to compare the raw and AC morphologies and the developed nanocarbon. The results were confirmed using energy dispersive X-ray (EDX) analysis to verify the elements in the studied sample. The SEM analysis revealed that the structure of both the carbon samples was irregular, granular, and porous. BET analysis showed that nano-activated carbon had higher surface area compared to activated carbon itself. Response surface methodology (RSM) was used in Design-Expert 13.0 software for the sample composition development to achieve the best performance of the developed nanocarbon as an adsorbent.

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Section: Bioresourcescommentioning

confidence: 99%

Synthesis and characterization of novel nano-carbon mixture from Dabai (Canarium odontophyllum) nutshell

James

Rahman

Huda

et al. 2022

BioRes

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“…Ferulic acid can be extracted from various natural sources such as orange pulp, sugarcane bagasse, or corn and wheat bran [21]. This compound is present in hemicellulose as a crosslinker of the polysaccharide chains [22] and can also be produced from lignin [23]. Ferulic acid has been considered for potential uses as an additive in food and cosmetic products due to its interesting antioxidant and potential drug-like properties [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Ferulic Acid as Building Block for the Lipase-Catalyzed Synthesis of Biobased Aromatic Polyesters

2021

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Enzymatic synthesis of aromatic biobased polyesters is a recent and rapidly expanding research field. However, the direct lipase-catalyzed synthesis of polyesters from ferulic acid has not yet been reported. In this work, various ferulic-based monomers were considered for their capability to undergo CALB-catalyzed polymerization. After conversion into diesters of different lengths, the CALB-catalyzed polymerization of these monomers with 1,4-butanediol resulted in short oligomers with a DPn up to 5. Hydrogenation of the double bond resulted in monomers allowing obtaining polyesters of higher molar masses with DPn up to 58 and Mw up to 33,100 g·mol−1. These polyesters presented good thermal resistance up to 350 °C and Tg up to 7 °C. Reduction of the ferulic-based diesters into diols allowed preserving the double bond and synthesizing polyesters with a DPn up to 19 and Mw up to 15,500 g·mol−1 and higher Tg (up to 21 °C). Thus, this study has shown that the monomer hydrogenation strategy proved to be the most promising route to achieve ferulic-based polyester chains of high DPn. This study also demonstrates for the first time that ferulic-based diols allow the synthesis of high Tg polyesters. Therefore, this is an important first step toward the synthesis of competitive biobased aromatic polyesters by enzymatic catalysis.

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“…Individual free amino acid values were expressed as g/100 g of the freeze-fried sample weight (Li & Wilkins, 2021a). The 11 essential amino acids were studied based on the FAO/WHO requirements (Zhang et al, 2019).…”

Section: Insect Species and Amino Acid Analysismentioning

confidence: 99%

Fourier-transform infrared spectroscopy and machine learning to predict amino acid content of nine commercial insects

et al. 2022

Self Cite

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The nutritional profile, especially amino acid profile, determines the quality and commercial value of insect protein products. Multiple previous studies have used spectroscopy technologies and machine learning algorithms to predict essential amino acid content in various foods and feeds. However, these approaches were not applied for predicting essential amino acid content in insects before. In this study, 200 insect samples containing 9 commercial insect species were collected. Machine learning methods were applied to build the prediction models to predict amino acid content using Fourier-transform infrared spectroscopy (FTIR) raw spectra and first derivative. For all amino acids, partial least square regression, decision tree and radial basis artificial neural network exhibited high performances to predict essential amino acids. Model performances were improved for some amino acids using first derivative than using raw spectra. The highest performance (coefficient of determination: 0.97, root mean square error of prediction: 0.05 g/100 g and ratio of performance: 4.07) was achieved for phenylalanine prediction using radial basis artificial neural network modeling. The high model performance indicates the potential of applying FTIR and subsequent machine learning modeling for fast and non-destructive prediction of amino acid of insect products.

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Lignin bioconversion into valuable products: fractionation, depolymerization, aromatic compound conversion, and bioproduct formation

Cited by 16 publications

References 227 publications

Synthesis and characterization of novel nano-carbon mixture from Dabai (Canarium odontophyllum) nutshell

Synthesis and characterization of novel nano-carbon mixture from Dabai (Canarium odontophyllum) nutshell

Ferulic Acid as Building Block for the Lipase-Catalyzed Synthesis of Biobased Aromatic Polyesters

Fourier-transform infrared spectroscopy and machine learning to predict amino acid content of nine commercial insects

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