Evaluation of the antifungal effects of bio-oil prepared with lignocellulosic biomass using fast pyrolysis technology

Kim, Kwang Ho; Jeong, Han Seob; Kim, Jae‐Young; Han, Gyu Seong; Choi, Joon Weon

doi:10.1016/j.chemosphere.2012.06.010

Cited by 26 publications

(9 citation statements)

References 15 publications

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“…All of the above results strongly confirm the suggestions given in the literature (Ilnicka et al, 2014;Mohan et al, 2008) that the phenolic compounds extracted from pyrolysis oils possess significant antioxidant capability that occurs via a free radical scavenging mechanism. lignin degradation showed a strong protective effect against fungal attack (Kim et al, 2012;Mourant et al, 2005;Suzuki et al, 1997). Other phenolic compounds such as phenol, 3-methylphenol, 2,3-dimethylphenols, 3-ethylphenol and eugenol also have strong effect on the antioxidant activity of raw bio-oils and their distilled fractions.…”

Section: Teac Assay and Concentration Of Phenolic Compounds In The Ramentioning

confidence: 99%

Evaluation of the antioxidant activities of different bio-oils and their phenolic distilled fractions for wood preservation

Hassan

El-Giar

Steele

2016

International Biodeterioration & Biodegradation

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This research investigated the antioxidant activities of raw bio-oils produced from pine and oak wood species. The study also included the effect of the pyrolysis parameters on the properties of the bio-oils produced. In addition to raw bio-oils, phenolic fractions were further isolated from the bio-oils at two different temperature ranges (180-220C and 220-270C) by using spinning band distillation columns. The antioxidant activities of raw bio-oils and phenolic fractions were evaluated using the Trolox equivalent antioxidant capacity (TEAC) assay. The concentrations of phenolic compounds were determined by gas chromatography/mass spectrometry (GC/MS). The results of the assay showed that the antioxidant activities of the phenolic fractions are much higher than those of the parent bio-oils. GC/MS analysis results showed that oguaiacol and its derivatives (4-methylguaiacol, 4-ethylguaiacol, and 4-propylguiacol), phenol, 3-methylphenol, 2,3-dimethylphenols, 3-ethylphenol and eugenol are the most

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Section: Teac Assay and Concentration Of Phenolic Compounds In The Ramentioning

confidence: 99%

Evaluation of the antioxidant activities of different bio-oils and their phenolic distilled fractions for wood preservation

Hassan

El-Giar

Steele

2016

International Biodeterioration & Biodegradation

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“…The largest component in the five wood vinegars that exhibited high fungicidal activities, especially in those made from rubberwood and bamboo, was total phenol. A previous study suggested that phenolic compounds derived from lignocellulosic biomass might be primarily responsible for the antifungal performance of wood vinegars [11]. Tar oil from macadamia nut shells was employed in vitro to protect wood against various wood-decaying fungi and wood-attacking termites [12].…”

Section: Introductionmentioning

confidence: 99%

Antifungal and antitermitic activities of wood vinegar from oil palm trunk

et al. 2018

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We evaluated the antifungal and antitermite activities of wood vinegars produced from oil palm trunk. The wood vinegars were produced at three different pyrolysis temperatures, 350, 400, and 450 °C. Antifungal activities of vinegars were evaluated using a Petri dish bioassay with 0.5, 1.0, and 1.5% (v/v) against a white-rot fungus, Trametes versicolor, and a brownrot fungus, Fomitopsis palustris. Antitermite activities were tested using a no-choice bioassay method for Coptotermes formosanus with 2.5, 5.0, 7.5, and 10.0% (v/v). All the wood vinegars exhibited antifungal activities against T. versicolor. In particular, the wood vinegar produced at 350 °C resulted in complete inhibition of T. versicolor growth at 1.0 and 1.5%. However, higher concentrations were required to obtain growth inhibition of F. palustris. All the wood vinegars exhibited antitermite activity to C. formosanus workers in the no-choice experiment at relatively high concentrations. For instance, 10% concentration was required to achieve 100% mortality against C. formosanus at all production temperatures. The lowest mass loss of the treated filter paper of 11.75% was obtained with a 350 °C-10.0% combination.

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“…Suggested mechanisms for negative priming effects have included the physical protection of soluble NSC on PyOM surfaces or within its pores (Smernik and Skjemstad, 2008;Kosozi et al, 2010), binding and blocking of extracellular microbial enzyme active sites (Lammirato et al, 2011), or the suppressive activity of antimicrobial compounds leached from the PyOM (Lehmann et al, 2011;Kim et al, 2012). As the proposed controls on priming should be significantly influenced by PyOM surface chemistry, environmental oxidation of PyOM could be an important factor for determining the response of NSC to PyOM addition.…”

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confidence: 99%

Photooxidation of pyrogenic organic matter reduces its reactive, labile C pool and the apparent soil oxidative microbial enzyme response

et al. 2017

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The surface chemistry of pyrogenic organic matter (PyOM) is altered by a variety of abiotic and biotic oxidative and sorption/desorption processes in the environment. Exposure of PyOM to high energy light prior to addition to soil or sediment, or while entrained in the atmosphere, may induce significant surface photooxidation, i.e., photochemical weathering, altering its environmental reactivity. We report on a 30-day soil incubation experiment testing the effects of the photochemical weathering of a 13 C-enriched ponderosa pine PyOM, produced by pyrolysis at 450°C, on PyOM and soil organic carbon (SOC) mineralization. PyOM C mineralization was measured for both the photochemically weathered (i.e. UV treated PyOM or PyOMUV) and PyOM not exposed to high-energy light (i.e. PyOMW serving as a dark control). PyOMW exhibited a 3.7 times faster C mineralization rate across the 30-d study, which was driven by a large early mineralization of accessible/labile C during the first 6 days. In contrast, PyOMUV had faster C mineralization rates in the later part of the experiment (days 11-30). Overall, PyOMUV had a 13% lower net C mineralization than the untreated PyOMW where the MRT of accessible PyOMUV-C and PyOMW-C was calculated at 25.7 ± 6.8 d and 1.7 ± 0.2 days, respectively. Both forms of PyOM promoted a similar net reduction in native SOC mineralization (i.e., negative priming) of approximately 50% relative to the unamended, control soil. Addition of either PyOM form resulted in an equivalent minor decrease in the concentration of extractable soil lignin phenols and substituted fatty acids chemistry with respect to the unamended soil. At 30 d, soil phenol oxidase and peroxidase enzyme activities were higher with additions of either form of PyOM compared with the unamended control soils with PyOMUV exhibiting lower activities than PyOMW. Our results indicate that PyOM photochemical weathering can impart important changes to short-term PyOM reactivity and soil microbial 3 activity, which could have important implications for soil systems by ultimately lowering turnover rates for both NSC and PyOM-C.

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Evaluation of the antifungal effects of bio-oil prepared with lignocellulosic biomass using fast pyrolysis technology

Cited by 26 publications

References 15 publications

Evaluation of the antioxidant activities of different bio-oils and their phenolic distilled fractions for wood preservation

Evaluation of the antioxidant activities of different bio-oils and their phenolic distilled fractions for wood preservation

Antifungal and antitermitic activities of wood vinegar from oil palm trunk

Photooxidation of pyrogenic organic matter reduces its reactive, labile C pool and the apparent soil oxidative microbial enzyme response

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