Investigation on the structural characteristics of the residues from extraction and oxidation of a sawdust

Wang, Sheng-Kang; Wei, Xian‐Yong; Xu, Dan; Li, Sheng; Zong, Zhi‐Min

doi:10.1016/j.fuel.2020.117091

Cited by 7 publications

(2 citation statements)

References 32 publications

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“…The absorption peaks at 3286 correspond to the –O–H stretching in alcohol and phenolic groups ( Lu et al ., 2019 ; Zhou et al ., 2019 ). The absorption peak in the region of 1630 cm −1 is attributed to the –C = O of ketones, quinone and amide groups (amide I band) ( Zhou et al ., 2019 ; Wang et al ., 2020 ). The weaker absorption peak at 1381 cm −1 indicates –OH deformation, –C–O stretching of phenolic –OH group, –COO asymmetric stretching and –C–H deformation of –CH 2 and –CH 3 groups ( Zhou et al ., 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Humic acid improves wheat growth by modulating auxin and cytokinin biosynthesis pathways

Rathor,

Upadhyay,

Ullah

et al. 2024

AoB PLANTS

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Humic acids have been widely used for centuries to enhance plant growth and productivity. The beneficial effects of humic acids have been attributed to different functional groups and phytohormone-like compounds enclosed in macrostructure. However, the mechanisms underlying the plant growth-promoting effects of humic acids are only partially understood. We hypothesize that the bio-stimulatory effect of humic acids is mainly due to the modulation of innate pathways of auxin and cytokinin biosynthesis in treated plants. A physiological investigation along with molecular characterization was carried out to understand the mechanism of bio-stimulatory effects of humic acid. A gene expression analysis was performed for the genes involved in auxin and cytokinin biosynthesis pathways in wheat seedlings. Furthermore, Arabidopsis thaliana transgenic lines generated by fusing the auxin-responsive DR5 and cytokinin-responsive ARR5 promoter to ß-glucuronidase (GUS) reporter were used to study the GUS expression analysis in humic acid treated seedlings. This study demonstrates that humic acid treatment improved the shoot and root growth of wheat seedlings. The expression of several genes involved in auxin (Tryptophan Aminotransferase of Arabidopsis and Gretchen Hagen 3.2) and cytokinin (Lonely Guy3) biosynthesis pathways was up-regulated in humic acid treated seedlings compared to the control. Furthermore, GUS expression analysis showed that bioactive compounds of humic acid stimulate endogenous auxin and cytokinin-like activities. This study is the first report in which using ARR5 :GUS lines we demonstrate the biostimulants activity of humic acid.

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Section: Resultsmentioning

confidence: 99%

Humic acid improves wheat growth by modulating auxin and cytokinin biosynthesis pathways

Rathor,

Upadhyay,

Ullah

et al. 2024

AoB PLANTS

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“…Coal is an important fossil fuel with a complex structure consisting of a macromolecular phase connected by cross-links, forming a three-dimensional network and a small molecular phase . The two phases are mainly connected by noncovalent bonding forces such as van der Waals forces, hydrogen bonds, π–π interactions, and charge-transfer interactions. − The solvent extraction of coal is an important process to investigate the molecular structure of coal, extraction and refining of organic matter in coal, − and pretreatment of coal. − …”

Section: Introductionmentioning

confidence: 99%

Interactions between Coal and Solvent during the Solvent Extraction of Coal in View of Free Radicals

Liu

et al. 2021

ACS Omega

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In this study, variations in the free radical concentration, degree of swelling (Q), and extraction yield of Buertai coal (C%, 80.4%) in 11 solvents with different characteristics were determined to investigate the interaction between the coal and solvent, as well as the bond cleavage during solvent extraction. Derivative thermogravimetry (DTG) results for the residues and raw coal were compared to confirm whether the covalent bond breaks during solvent extraction. The free radical concentration decreases in certain solvents but increases in a few others. The relative free radical concentration, Q, and extraction yield are positively correlated. The charge-transfer capability of the solvent, and in particular its electron-donating capability, plays an essential role in influencing the interaction between the coal and solvent. The increase in the free radical concentration during solvent extraction can be attributed to (1) the formation or decomposition of charge-transfer complexes, (2) dissociation of charge-transfer complexes into radical ions, and (3) breakage of weak covalent bonds. DTG results show the occurrence of weak covalent bonds breakage at temperatures of 133.9−320.1 °C during solvent extraction due to the reduction of the bond energy caused by the formation of radical ions.

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The biostimulatory effect of humic‐based soil amendment on plant growth, root nodulation, symbiotic nitrogen fixation and yield of field pea (Pisum sativum L.)

Rathor,

Upadhyay,

Ullah

et al. 2024

J of Sust Agri & Env

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IntroductionPea is one of the most important pulse legumes globally due to its high protein, which is due to its ability to fix atmospheric nitrogen through a symbiotic relationship with nitrogen‐fixing rhizobia. Symbiotic nitrogen fixation (SNF) should be optimized to maximize nitrogen fixation and achieve higher yields with more grain protein. The use of humic‐based soil amendments in crop production has garnered considerable attention in recent years due to their biostimulatory effect in improving plant growth, yield, nutritional quality and soil health. This study examines the impact of a humic‐based soil amendment (Humalite) on root nodulation, SNF, plant growth, yield and grain protein of pea.Materials and MethodsChemical characterization was performed using Fourier transform infrared spectroscopy (FTIR). Pea plants inoculated with Rhizobia were grown in pots under greenhouse conditions with five different Humalite rates (0, 200, 400, 800 and 1600 kg ha−1). SNF capacity was assessed using the 15N‐isotope dilution method.ResultsFTIR analysis revealed the abundant presence of hydroxyl (‐OH) and carboxyl (‐CO) functional groups in Humalite. Plants treated with Humalite displayed augmented root traits [root length (21%–50%), root surface area (24%–51%), volume (26%–53%), average nodule weight (11%–91%)], plant biomass [shoots (13%–29%) and roots (29%–54%)], shoot nitrogen concentration (12%–33%), shoot total nitrogen content (38%–53%), percentage nitrogen derived from the atmosphere (8%–14%) and total shoot nitrogen fixed (48%–80%) compared to the control plants at the flowering stage. Furthermore, at seed maturity stage, plants treated with Humalite at 400 and 1600 kg ha−1 exhibited a significant increase in plant biomass (4%–14%), number of seeds (8%–16%), seed weight (3%–11%), seed nitrogen content (8%–20%) and total seed nitrogen fixed (7%–22%) compared to the control plants.ConclusionsThese findings demonstrate that humic‐based soil amendment can effectively enhance plant growth, root nodulation, SNF and seed yield, thereby supporting sustainable agricultural practices.

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Investigation on the structural characteristics of the residues from extraction and oxidation of a sawdust

Cited by 7 publications

References 32 publications

Humic acid improves wheat growth by modulating auxin and cytokinin biosynthesis pathways

Humic acid improves wheat growth by modulating auxin and cytokinin biosynthesis pathways

Interactions between Coal and Solvent during the Solvent Extraction of Coal in View of Free Radicals

The biostimulatory effect of humic‐based soil amendment on plant growth, root nodulation, symbiotic nitrogen fixation and yield of field pea (Pisum sativum L.)

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