Three commercial silicone emulsions with different functional groups i.e., quat-silicone micro-emulsion (<40 nm particle size), amino-silicone macro-emulsion (110 nm), and silicone macro-emulsion with alkylmodified side groups (740 nm) were used to protect wood samples against fungal decay. The addition of the emulsions to an agar growth medium revealed that all three silicone formulations inhi...

The aim of this research was to study the physical and chemical performance of poplar wood treated by chemi-thermal modification. A thermal treatment was used to catalyze the effect of the methylolurea impregnated pre-treatment by curing the poplar wood at 160 °C under atmospheric conditions. The results showed that the thermal treatment played an important role in the chemical and mechanical p...

Wood is the most abundant biomass produced by land plants. Dissection of the molecular mechanisms underlying the transcriptional regulation of wood formation is a fundamental issue in plant biology and has important implications in tree biotechnology. Although a number of transcription factors in tree species have been shown to be associated with wood formation and some of them are implicated i...

BACKGROUND Significant variation in the inherent degree of acetylation naturally exists in the xylem cell walls of Populus trichocarpa. During pretreatment, endogenous acetate hydrolyzes to acetic acid that can subsequently catalyze the breakdown of poplar wood, increasing the efficiency of biomass pretreatment. RESULTS Poplar genotypes varying in cell wall composition were pretreated in 0.3%...

Eleven gram-negative aerobic bacteria (Pseudomonadaceae and Neisseriaceae) out of 122 soil isolates were selected for their ability to assimilate poplar dioxane lignin without a cosubstrate. Dioxane lignin and milled wood lignin degradation rates ranged between 20 and 40% of initial content after 7 days in mineral medium, as determined by a loss of absorbance at 280 nm; 10 strains could degrade...

Chemical modification as a non-biocidal treatment is an effective method to improve physical and biological properties of wood. Poplar fast growing species but has poor dimensional stability durability in addition low mechanical properties. Low molecular weight Dimethylol dihydroxyethyleneurea (mDMDHEU) was used the poplar mainly decay resistance. Results indicated high anti-swelling efficiency...

To reduce the risks associated with global transport of wood infested with pinewood nematode Bursaphelenchus xylophilus, microwave irradiation was tested at 14 temperatures in replicated wood samples to determine the temperature that would kill 99.9968% of nematodes in a sample of ≥ 100,000 organisms, meeting a level of efficacy of Probit 9. Treatment of these heavily infested wood samples (mea...

Treatment of wood with various physical and chemical factors can change the number parameters, which also lead to changes in resistance wood-destroying fungi. This study evaluates effects hydrothermal treatments (additives Fe2O3 or FeCl3 without commercial tannins, additives fresh wood) on decay mould fungi modified Scots pine (Pinus sylvestris), Norway spruce (Picea abies), Douglas fir (Pseudo...

Acetylation is a well-established process to improve dimensional properties of wood and resistance fungi attack. This study was carried out due limited studies on the effect acetylation mechanical properties, thermal stability, microstructural aspects wood. Wood blocks, (each 20×20×60 mm) Obeche were acetylated with acetic anhydride at 120 °C for 60, 120, 180, 240 300 minutes. The microstructur...

Background and Purpose: Most projections of the global energy use predict that biomass will be an important component of primary energy sources in the coming decades. Short rotation plantations have the potential to become an important source of renewable energy in Europe because of the high biomass yields, a good combustion quality as solid fuel, ecological advantages and comparatively low bio...