Oil in Water Nanoemulsions Loaded with Tebuconazole for Populus Wood Protection against White- and Brown-Rot Fungi

Eugenol in water nanoemulsions loaded with tebuconazole appear as a very promising alternative formulations for wood protection against xylophagous fungi that are the main species responsible for different rots in wood structures. The dispersions as prepared and upon dilution (impregnation mixtures) were characterized by the apparent hydrodynamic diameter distribution of the oil droplets loaded with tebuconazole and their long-term stability. The impregnation mixtures were applied on wood of Populus canadensis I-214 clone by using a pressure-vacuum system, and the effectiveness against fungal degradation by Gloeophyllum sepiarium and Pycnoporus sanguineus fungi was determined. The retention of tebuconazole in wood was about 40% of the amount contained in the impregnation mixtures. The results showed that the impregnation process leads to a long-term antifungal protection to the wood, with the mass loss after 16 weeks being reduced more than 10 times in relation to the control (untreated poplar wood) and the reference wood (untreated beech wood).

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Efficacy of Caffeine Treatment for Wood Protection—Influence of Wood and Fungi Species

Polymers ◽

10.3390/polym13213758 ◽

2021 ◽

Vol 13 (21) ◽

pp. 3758

Author(s):

Miloš Pánek ◽

Vlastimil Borůvka ◽

Jana Nábělková ◽

Kristýna Šimůnková ◽

Aleš Zeidler ◽

...

Keyword(s):

Mechanical Properties ◽

Beech Wood ◽

Ecological Integrity ◽

Treated Wood ◽

Physical And Mechanical Properties ◽

Brown Rot ◽

European Beech ◽

Brown Rot Fungi ◽

Wood Protection ◽

Caffeine Treatment

In the future, we can expect increased requirements to the health and ecological integrity of biocides used for the protection of wood against bio-attacks, and it is therefore necessary to search for and thoroughly test new active substances. Caffeine has been shown to have biocidal efficacy against wood-destroying fungi, moulds and insects. The aim of the research was to determine whether the effectiveness of caffeine, as a fungicide of natural origin, is affected by a different type of treated wood. Norway spruce mature wood (Picea abies), Scots pine sapwood (Pinus sylvestris), and European beech wood (Fagus sylvatica) were tested in this work. The samples were treated using long-term dipping technology or coating (according to EN 152:2012) and then tested against selected wood-destroying brown rot fungi according to the standard EN 839:2015, wood-staining fungi according to EN 152:2012, and against mould growth according to EN 15457:2015. The penetration of caffeine solution into wood depth was also evaluated using liquid extraction chromatography, as well as the effect of the treatment used on selected physical and mechanical properties of wood. The test results showed that the type of wood used and the specific type of wood-degrading agent had a significant effect on the effectiveness of caffeine protection. The most resistant wood was the treated spruce, whereas the most susceptible to deterioration was the treated white pine and beech wood. The results of the work showed that caffeine treatment is effective against wood-destroying fungi at a concentration of 2%, and at 1% in some of the tested cases. It can be used as an ecologically acceptable short-term protection alternative against wood-staining fungi in lumber warehouses and is also partially effective against moulds. It also does not have negative effects on changes in the physical and mechanical properties of the tested wood species.

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The Resistance of Wood Chemically Modified with Isocyanates. Part 1. Brown Rot, White Rot and Acid Chlorite Delignification

Holzforschung ◽

10.1515/hf.1999.039 ◽

1999 ◽

Vol 53 (3) ◽

pp. 230-236 ◽

Cited By ~ 9

Author(s):

F. Cardias Williams ◽

M.D. Hale

Keyword(s):

Chemical Modification ◽

Weight Percent Gain ◽

Brown Rot ◽

Weight Percent ◽

Pinus Nigra ◽

Fungal Species ◽

White Rot ◽

Sodium Chlorite ◽

Pycnoporus Sanguineus ◽

Wood Protection

Summary This study was to assess the bioprotectant performance of chemical modification with three different isocyanates (n-butyl, hexyl and 1,6-diisocyanatohexane, BuNCO, HeNCO and HDI respectively) in Corsican pine (Pinus nigra Schneid) sapwood. Wood-isocyanate bond formation was verified by the increase in sample weight, volume and by infra-red spectroscopy. Basidiomycete (Coniophora puteana, Gloeophyllum trabeum, Coriolus versicolor, Pycnoporus sanguineus) decay tests demonstrated protection by chemical modification. The relationships of fungal species, weight percent gain (WPG), and decay induced weight loss were examined. One of the brown rot fungi, C. puteana, showed higher threshold protection values than the other fungi tested and the diisocyanate showed better performance. Chemical characteristics of the sound and brown rotted wood (C. puteana) have been examined using sulphuric acid and sodium chlorite procedures to clarify the principles which govern isocyanate modifications and restrict fungal decay. These demonstrated that appreciable wood protection against C. puteana only occurred when the holocellulose fraction showed substantial changes due to chemical modification.

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Resistance of Scots pine wood to Brown-rot fungi after long-term forest fertilization

Trees ◽

10.1007/s00468-005-0002-x ◽

2005 ◽

Vol 19 (6) ◽

pp. 729-735 ◽

Cited By ~ 8

Author(s):

Juha Heijari ◽

Anne-Marja Nerg ◽

Seija Kaakinen ◽

Elina Vapaavuori ◽

Hannu Raitio ◽

...

Keyword(s):

Scots Pine ◽

Brown Rot ◽

Forest Fertilization ◽

Pine Wood ◽

Brown Rot Fungi

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In situ molecular detection of some white-rot and brown-rot basidiomycetes infecting temperate and tropical woods

Canadian Journal of Forest Research ◽

10.1139/x05-056 ◽

2005 ◽

Vol 35 (5) ◽

pp. 1256-1260

Author(s):

Alba Zaremski ◽

Marc Ducousso ◽

Odile Domergue ◽

Joel Fardoux ◽

Cécile Rangin ◽

...

Keyword(s):

Dna Sequences ◽

Wood Decay ◽

Brown Rot ◽

White Rot ◽

Pycnoporus Sanguineus ◽

Average Mass ◽

Brown Rot Fungi ◽

Pcr Products ◽

Tropical Woods

Wood-decay white-rot and brown-rot fungi have a major economic impact on commercial and manufactured tropical and temperate woods. The aim of this study was to design a molecular method, coupled with polymerase chain reaction (PCR) and DNA sequencing, to enable early identification of various forms of fungal decay in various types of wood. The resulting tool could be used to certify the healthiness of commercial woods and also to make more efficient use of chemicals and thus reduce their negative environmental impact. Sapwood plates of Distemonanthus benthamianus,Fagus sylvatica, Lophira alata, Pinus sylvestris, and Pycnanthus angolensis were incubated in vitro in the presence of Fibroporia vaillantii, Coniophora puteana, Gloeophyllum trabeum, Pycnoporus sanguineus, and Trametes versicolor according to the EN 113 standard method. Average mass losses ranging from 2.6% to 25.0% indicated that all wood samples had been actually infected and enabled us to test the reliability of our method. PCR products were obtained in 24 of 25 combinations, and DNA sequences were obtained in 21 of the 24 fungal PCR products. DNA sequences obtained from infected wood were compared with sequences from pure strains, thus confirming the identity of the infecting strains with 100% similarity for an average of 412 bp.

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Changes in chemical composition of decayed Scots pine and beech wood

Science and Engineering of Composite Materials ◽

10.1515/secm-2013-0180 ◽

2014 ◽

Vol 21 (4) ◽

pp. 589-595 ◽

Cited By ~ 6

Author(s):

Eylem Dizman Tomak

Keyword(s):

Chemical Composition ◽

Ir Spectra ◽

Scots Pine ◽

Degradation Mechanism ◽

Beech Wood ◽

Accelerated Aging ◽

Brown Rot ◽

Brown Rot Fungi ◽

Decay Test ◽

Ft Ir

AbstractIn this study, changes in chemical composition of aged and unaged Scots pine and beech wood decayed by brown-rot fungi Coniophora puteana and Poria placenta were presented by Fourier transform infrared (FT-IR) spectra. Samples were exposed to six complete cycles of accelerated aging for 12 days and then subjected to brown-rot fungi attack for 8 weeks. Weight loss of samples was found to be 25–46% depending on wood and fungi species and being aged ones. Accelerated aging treatments seemed to have a slight role on chemical composition of Scots pine and beech samples while they increased biodegradation of samples. FT-IR spectra showed degradation of wood carbohydrates revealed by reduction of the peaks responsible for hemicellulose and cellulose at 1730, 1370, 1150, and 897 cm-1 in pine and 1730, 1370, 1027, and 897 cm-1 in beech. Stronger lignin peaks at 1650, 1593, 1506, 1455, 1422, 1261, and 1230 cm-1 in pine and 1650, 1506, 1455, and 1422 cm-1 in beech were obtained after decay test. FT-IR spectra of samples were consistent with the degradation mechanism of brown-rot fungi. In general, changes in the carbohydrate and lignin peaks were greater in samples exposed to accelerated aging treatments for both wood species.

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Decay resistance of wood treated with amino-silicone compounds

Holzforschung ◽

10.1515/hf.2008.016 ◽

2008 ◽

Vol 62 (1) ◽

pp. 112-118 ◽

Cited By ~ 20

Author(s):

Oliver Weigenand ◽

Miha Humar ◽

Geoffrey Daniel ◽

Holger Militz ◽

Carsten Mai

Keyword(s):

Beech Wood ◽

White Rot Fungi ◽

Brown Rot ◽

Decay Resistance ◽

Solute Concentration ◽

White Rot ◽

White Rot Fungus ◽

European Standard ◽

Brown Rot Fungi ◽

Amino Silicone

AbstractAn amino-silicone (AS; amino-polydimethylsiloxane) micro-emulsion was tested for its suitability to preserve wood against basidiomycetes in a mini-block experiment and in a test according to the European standard (1996) EN 113. Decay resistance was assessed against the white rot fungiTrametes versicolor,Ceriporiopsis subvermispora, andHypoxylon fragiforme, as well as the brown rot fungiConiophora puteana,Antrodia vaillantii,Gloeophyllum trabeumandSerpula lacrymans. Pine sapwood and beech wood were treated with AS emulsions at solute concentration levels of 2%, 5% and 15%. The mini-blocks treated with 15% concentrations of AS resisted decay byT. versicolorandC. puteanaover a long time (12 weeks), while samples treated with low and moderate concentrations underwent considerable mass losses. Accordingly, microscopic studies revealed a high degree of colonisation by the white rot fungus and loss of cell wall integrity (brown rot) in samples treated with 2% AS. At high AS content (15%), no or only initial stages of decay could be observed. In the European standard (1996) test EN 113, the mass loss in all fungal cultures except for the white rot ascomyceteH. fragiformewas below 5%, when the samples were treated with 15% AS. The effect of low and moderate AS concentration on the decay resistance was dependent on the fungal strain. The mode of action of AS treatment against basidiomycete decay is discussed.

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Resistance of Scots pine wood to Brown-rot fungi after long-term forest fertilization

Trees ◽

10.1007/s00468-005-0035-1 ◽

2006 ◽

Vol 20 (2) ◽

pp. 263-263 ◽

Cited By ~ 1

Author(s):

Juha Heijari ◽

Anne-Marja Nerg ◽

Seija Kaakinen ◽

Elina Vapaavuori ◽

Hannu Raitio ◽

...

Keyword(s):

Scots Pine ◽

Brown Rot ◽

Forest Fertilization ◽

Pine Wood ◽

Brown Rot Fungi

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Lignocellulosic Waste Pretreatment Solely via Biocatalysis as a Partial Simultaneous Lignino-Holocellulolysis Process

Catalysts ◽

10.3390/catal11060668 ◽

2021 ◽

Vol 11 (6) ◽

pp. 668

Author(s):

Justine Oma Angadam ◽

Seteno Karabo Obed Ntwampe ◽

Boredi Silas Chidi ◽

Jun Wei Lim ◽

Vincent Ifeanyi Okudoh

Keyword(s):

Literature Review ◽

Digestive Enzyme ◽

Interdisciplinary Approach ◽

Brown Rot ◽

Lignocellulosic Waste ◽

Brown Rot Fungi ◽

Hydrolysis Products ◽

Plant Exudates ◽

Rapid Industrialization ◽

Environmentally Friendly Approach

Human endeavors generate a significant quantity of bio-waste, even lignocellulosic waste, due to rapid industrialization and urbanization, and can cause pollution to aquatic ecosystems, and contribute to detrimental animal and human health because of the toxicity of consequent hydrolysis products. This paper contributes to a new understanding of the lignocellulosic waste bio-pretreatment process from a literature review, which can provide better biorefinery operational outcomes. The simultaneous partial biological lignin, cellulose and hemicellulose lysis, i.e., simultaneous semi-lignino-holocellulolysis, is aimed at suggesting that when ligninolysis ensues, holocellulolysis is simultaneously performed for milled lignocellulosic waste instead of having a sequential process of initial ligninolysis and subsequent holocellulolysis as is currently the norm. It is presumed that such a process can be solely performed by digestive enzyme cocktails from the monkey cups of species such as Nepenthes, white and brown rot fungi, and some plant exudates. From the literature review, it was evident that the pretreatment of milled lignocellulosic waste is largely incomplete, and ligninolysis including holocellulolysis ensues simultaneously when the waste is milled. It is further proposed that lignocellulosic waste pretreatment can be facilitated using an environmentally friendly approach solely using biological means. For such a process to be understood and applied on an industrial scale, an interdisciplinary approach using process engineering and microbiology techniques is required.

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Unraveling the natural durability of wood: revealing the impact of decay-influencing characteristics other than fungicidal components

Holzforschung ◽

10.1515/hf-2020-0109 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Liselotte De Ligne ◽

Jan Van den Bulcke ◽

Jan M. Baetens ◽

Bernard De Baets ◽

Gang Wang ◽

...

Keyword(s):

Wood Species ◽

Prunus Avium ◽

Brown Rot ◽

Natural Durability ◽

Anatomical Features ◽

Brown Rot Fungi ◽

Material Characteristics ◽

The One ◽

Block Test ◽

The Impact

AbstractThe effect of fungicidal components in wood has been known for ages, yet there is no method to assess the impact of such components on the durability of a wood species, as compared to other material characteristics that influence decay. In this paper, the importance of fungicidal effects on the natural durability of 10 wood species is assessed in relation to other decay-influencing factors with a new test, the so-called ‘paste test’. By comparing results from this test with the ‘mini-block test’, on both heartwood and leached sapwood, insight is gained into the significance of fungicidal components on the one hand and other material characteristics on the other hand. The durability of species such as Prunus avium was attributed mainly to fungicidal components. For species such as Pterocarpus soyauxii, durability seemed to be an effect of both fungicidal components and moisture-regulating components, while the latter seemed to be of main importance in regulating the decay of Aucoumea klaineana and Entandrophragma cylindricum. Wood-anatomical features, such as the parenchyma content (in case of brown rot fungi) and the vessel-fiber ratio, possibly affect degradation as well. This work shows that fungicidal components are not always of major importance for the durability of a wood species. The authors hereby emphasize the importance of moisture-regulating components and wood anatomy on the durability of wood.

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MICRONUTRIENT CONTENTS IN THE PROFILE OF A RECOVERED SOIL WITH SEWAGE SLUDGE AND NATIVE SPECIES OF ATLANTIC FOREST

FLORESTA ◽

10.5380/rf.v49i3.59351 ◽

2019 ◽

Vol 49 (3) ◽

pp. 485

Author(s):

Lívia Mara Lima Goulart ◽

Marianne Fidalgo de Faria ◽

Grasiela Spada ◽

Thiago Tássio de Souza Silva ◽

Iraê Amaral Guerrini

Keyword(s):

Sewage Sludge ◽

Atlantic Forest ◽

Soil Profile ◽

Native Species ◽

Control Treatment ◽

Mineral Fertilization ◽

Promising Alternative ◽

Final Destination ◽

Potassium Supplementation

The use of sewage sludge in agriculture and recovery of degraded areas has been shown as a promising alternative for its final destination. Studies on micronutrient levels after sludge application are necessary to avoid soil contamination at toxic levels. The objective of this work was to verify the micronutrient contents in the soil profile and pH, up to one-meter-deep, nine years after the application of sewage sludge and planting of native species of the Atlantic Forest. The experiment was implemented in a degraded Quartzeneic Neosol and conducted in randomized blocks with four replicates and eight treatments, consisting of six doses of sewage sludge (0, 2.5, 5, 10, 15 and 20 Mg ha-1, with supplementation of potassium due to low concentration in the residue), besides the control treatment, mineral fertilization and only potassium supplementation. After nine years, the contents of all micronutrients evaluated presented a significant response to the application of the treatments, and the application of sewage sludge provided an increase in their contents. Soil pH remained stable at sites receiving mineral fertilization and potassium supplementation. Only manganese and zinc showed mobility in the soil profile. The application of sewage sludge in degraded soil increases the micronutrient content and decreases its movement in the soil profile, and the application of the maximum dose of the residue does not provide toxic levels of these elements in the soil in the long term.

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