Your search resulted in 36 documents. Displaying 25 entries per page.
Wood Natural durability study source of biomolecules: case of Dicorynia guianensis Amsh. heartwood
2016 - IRG/WP 16-10871
…and were isolated for the first time as natural products ABTS antioxydant activity guided their isolation and showed the potential of these compounds in industrial sectors
J-B Say Anouhe, A A Adima, F B Niamké, D Stien, B Kassi Amian, D Virieux, J-L Pirate,S Kati-Coulibaly, N Amusant
Study of the use of organosolv lignin as bio-preservative of wood
2012 - IRG/WP 12-30603
…techniques such as FTIR, GPC, and TGA. Furthermore, the antioxidant potential of lignin by ABTS method and the fungicide potential by ASTM D 2017 – 81 were analyzed. The analyzed lignin showed neutralization and inhibition activities (antioxidant capacity). These characteristics demonstrated that lignin could be…
P S B dos Santos, A Garcia, P H G de Cademartori, D A Gatto, J Labidi
Vacuum drying of European oakwood: Color, chemistry and anti-oxidant potency of wood. Improving appearance in forest value added products
2008 - IRG/WP 08-40432
…drying conditions. In particular, surface-wood scans, antioxidant capacity of wood, Fourier Transform Infrared Spectra of dust-wood for different vacuum and convective drying conditions. Sample temperatures and pressure in the dryer are logged during drying. The experimental setup (Figure 1) is a vacuum chamber…
S Sandoval, W Jomaa, F Marc, J-R Puiggali
Targeted inhibition of wood decay fungi: degradation of cotton cellulose
1999 - IRG/WP 99-10321
…cotton cellulose was treated with free radical scavengers, antioxidants, dyes and hydroxy-radical detectors 2,2'-Azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) in order to assess their ability to retard cellulose hydrolysis. Weight loss of cotton cellulose is the most reliable and accurate measure…
F Green III, T A Kuster
Multifactorial analysis of the reasons behind wood natural durability
2025 - IRG/WP 25-11065
Physical, chemical and biological properties of several wood species were investigated in order to highlight the main factors involved in wood natural durability and wood characteristic using a principal component analysis. Interaction of wood with water were…
L-F E Nkogo, M S M Mouendou, S Dumarçay, P E Engonga, F Zannini, E Gelhaye, P Gérardin
Enhancing the Effectiveness of Penflufen by using a Plant Booster
2025 - IRG/WP 25-20759
…and derived from grape seeds. This plant booster contains antioxidant bioactive ingredients which act as antioxidants by scavenging/chelating free radicals and pro-oxidant metals and by inhibiting oxygen and oxygenated compounds, promoting relatively greater diffusion and fixation of active substances into wood cell…
D Messaoudi, A Robert, P Meckler, T Jaetsch
Impregnation of wood with antifungal compounds from low-quality tree biomass
2022 - IRG/WP 22-30763
…assay. The extracts were colorimetrically analyzed on antioxidant properties by measuring free radical scavenging activity. The resistance of with extractives impregnated wood was measured with a so-called mini-block test (modified EN 113). Wood of less durable conifers and deciduous tree species was impregnated…
V Vek, I Poljanšek, A Balzano, M Humar, P Oven
Biocomposites based on PVA, cellulose nanofibrils and tannic acid
2022 - IRG/WP 22-40957
Biocomposite films based on a polyvinyl alcohol (PVA) with the addition of cellulose nanofibrils (CNF) as a reinforcing component and with the addition of the biologically active tannic acid (TA) were prepared. The influence of different additions of CNF and T…
U Osolnik, V Vek, I Poljanšek, Poven
Extraction, identification and antifungal activity of polar extractives originated from various wood species
2020 - IRG/WP 20-20673
…of functional groups or molecules with bioactivity or antioxidant properties, that could be used in medicine, cosmetic or wood preservation. The increasing social and economic interest in obtaining chemical compounds from sustainable sources has motivated this research study. It is expected that the…
R Herrera, F Poohphajai, J Labidi, S Willför, A Sandak
Characterization of waste from Pinus radiata generated during industrial thermal-treatment
2016 - IRG/WP 16-20586
…by sugars and lignin derived compounds, with unremarkable antioxidant capacity. In contrast, the liquid sample started to degrade at lower temperatures (around 200 °C) and predominantly was composed by a large amount of phenolic and volatile compounds. Moreover, this liquid fraction exhibited a positive scavenging…
R Herrera, D Thomas da Silva, R Llano-Ponte, J Labidi
Investigations on the durability of several Congo basin wood species
2015 - IRG/WP 15-10840
…chemical functional groups in all extracts studied. Antioxidant activity indicated values comprised between 18 and 175 µmol AAE/µg of extract correlated to total phenolic content which were comprised between 51 and 935 mg eq. of gallic acid/g of extract. The resistance to decay of extracted and unextracted…
S Mounguengui, J-B Tchinda Saha, M Kor Ndikontar, S Dumarçay, C Attéké, D Perrin, E Gelhaye,
Chemical composition of extractives of different wood compartments of Pinus merkusii and their potential implication in wood durability
2015 - IRG/WP 15-10841
…their chemical composition analyzed using GC-MS and LC-MS. Antioxidant and antifungal activities were also evaluated by DPPH method and growth inhibition method, respectively. The results showed that knotwood contains more extractives than heartwood, the latter containing more extractives than sapwood. Knotwood…
A Wijayanto, S Dumarçay, R Kartika Sari, W Syafii, P Gérardin, C Gérardin-Charbonnier
Emerging function for a glutathione transferase in response to wood extractives toxicity
2014 - IRG/WP 14-10824
…signalling and stress responses. Focusing on the induced antioxidant and detoxification systems, a glutathione transferase of the GTT2 class has been selected for functional characterization. This enzyme does not possess any classical glutathione transferase activity but rather a peroxidase activity. The occurrence…
A Thuillier, K Chibani, A Deroy, S Dumarçay, P Gérardin, A Kohler, J-P Jacquot, E Gelhaye, M Morel-Rouhier
Influence of selected additives on organic fungicides for control of bamboo mold fungi
2013 - IRG/WP 13-30626
…in outdoor applications, additives - including the antioxidant butylated hydroxytoluene (BHT) and a UV absorber and free radical scavenger benzotriazole (BTA), were selected to mix with the fungicides propiconazole or tebuconazole. Freshly cut samples from four-year old bamboo stems were treated with…
Sun Fangli, B Goodell, Chen Anliang, Bao Binfu, Zhang Shaoyong
Effect of an antioxidant on the efficacy of organic wood preservatives in an accelerated soil contact decay test
2012 - IRG/WP 12-30583
…In this study the possibility of using the benign antioxidant BHT as a non-biocidal additive to improve the performance of wood treated with isothiazolone and azoles was investigated. The treated wood with and without BHT was exposed to unsterile soil and monitored for decay by dynamic MOE. It was found that…
D D Nicholas, J Shi, T P Schultz, L Sites
New insights from NMR, FTIR, X-ray diffraction and physical chemistry into digestive processes in the wood-boring marine crustacean Limnoria quadripunctata
2010 - IRG/WP 10-10732
…The hindgut lumen was found to be relatively anoxic. The antioxidant BHT significantly reduces feeding rates under laboratory conditions. These findings taken together give a picture of the effects of the activity of the recently described suite of digestive enzymes on their substrate.
G P Malyon, S LaBarre, N Kervarec, P Carey, J McGeehan, X Xie, A Klüppel, S M Cragg
Effects of Cunninghamia Lanceolata Heartwood Extracts on the Growth of Wood Decay Fungi
2010 - IRG/WP 10-30527
…of butylated hydroxytoluene (BHT), which is a commercial antioxidant. In vitro bioactive tests showed that none of the three extracts were strongly inhibitory to cultures of Trametes versicolor, Gloeophyllum trabeum, Aspergillus niger or Paecillomyces variotii. These results suggest that the combination of…
Shujun Li, Jing Wang, Jian Li
Direct estimation of the durability of high-pressure steam modified wood by ESR-spectroscopy
2010 - IRG/WP 10-40508
…steam modified wood. It also provides evidence for an antioxidant mechanism, responsible for the durability enhancement in heat treated wood.
W Willems, A Tausch, H Militz
Impact of an Antioxidant on the Efficacy of Quaternary Ammonium Compounds (Quats) and Triazoles – Seven Year Above-Ground Study
2009 - IRG/WP 09-30504
It has been reported that antioxidants have great potential for use with organic biocides in the area of wood protection. This paper demonstrates the impact of a low level of the antioxidant butylated hydroxytoluene (BHT) on the efficacy of quat-based and triazole-based formulations.…
Xiao Jiang, D Biro, W Holcombe
Effect of extractives on durability of Prosopis juliflora heartwood
2009 - IRG/WP 09-30518
…contain mainly (-)-mesquitol possessing important antioxidant properties, which can be at the origin of durability to fungi. Durability of heartwood was also investigated towards Macrotermes natalensis, a subterranean termite commonly found in Kenya, on extracted or unextracted wood blocks. Weight losses on…
P Sirmah, K Iaych, B Poaty, S Dumarçay, P Gérardin
A hypothesis on a second non-biocidal property of wood extractives, in addition to toxicity, that affects termite behavior and mortality
2008 - IRG/WP 08-10638
…the well known fact that many extractives have excellent antioxidant properties in addition to some termite toxicity, that: 1) the antioxidant properties of wood extractives interfere with the termite and symbiotic microbial digestion of lignocellulose; 2) thus, over time
termites have learned to recognize and…
T P Schultz, K Ragon, D D Nicholas
Oxidative stress and lignin peroxidase production in Phanerochaete chrysosporium
2008 - IRG/WP 08-10655
…that the expression of the mitochondrial thiol-related antioxidant system is not directly coupled to the LiPs expression. When the antioxidant systems are not able to cope with ROS accumulation, a major change in the respiratory pathway leading to a large modification of the oxidative phosphorylation occurs. The…
M Morel, L Diss, C Fourrey, M Chalot, M Droux, J P Jacquot, E Gelhaye
Effect of amphiphilic antioxidant alkyl ammonium ascorbate on inhibition of fungal growth: Application to wood preservatives formulation
2008 - IRG/WP 08-30466
…indicated classical behavior of cationic surfactants. Antioxidant properties, estimated using methyl linoleate oxidation inhibition method, were similar to that of ascorbic acid tested in the same conditions. Growth inhibition assays indicated that amphiphilic dodecylammonium ascorbate is able to inhibit…
C Gérardin , T Koumbi Mounanga, P Gérardin
Effect of wood polymers degradation during heat treatment on extracellular enzymatic activities involved in beech degradation by Trametes versicolor
2008 - IRG/WP 08-40392
…extracellular enzymatic activities investigated. A strong ABTS oxidizing activity has been detected during the first stage of colonization in both cases, while cellulase activities are mainly detected in the case of untreated beech wood. Further investigations carried out on holocellulose, isolated using sodium…
S Lekounougou, G Nguila Inari, M Pétrissans, S Dumarçay, J P Jacquot, E Gelhaye, P Gérardin
Effect of Cinnamomum kanehirae Extractives on the Compositions of the Fermentation Broth of Antrodia cinnamomea
2007 - IRG/WP 07-10632
…with C. kanehirae extractives on the fungal biomass, antioxidant scavenging activity using 1, 1-diphyenyl-2-picrylhydrazyl (DPPH) were examined, and the compositions of the fermentation broth were monitored using high-performance liquid chromatography analysis. The results indicate that C. kanehirae extractives…
Ruo-Yun Yeh, Yuan-Min Shen , Shang-Tzen Chang