azomethine-H methods are based on ABSTRACT photometry (1,9,33). AWPA A2-98 (1) This paper describes the development of a microsssay for boron and the application macroassay method has been used in of this microassay for evaluating leachability of boron by post-treatment of southern several studies to measure boron conpine with the calcium precipitating agent NHA (N'N-napthaloylhydroxylamine). T...

Heat treatment may result in variation of wood equilibrium moisture content (EMC). During this study, tauari (Couratari oblongifolia), ash (Fraxinus excelsior), and oak (Quercus rubra) woods were heat-treated at 190, 200, and 210oC for 3 hours and then put into a conditioning chamber with a temperature from 30 to 75oC and a relative humidity from 50 to 90%. The isothermal moisture adsorption cu...

Lignocellulose, composed of cellulose, hemicellulose, and lignin, in the secondary cell wall constitutes wood and is the most abundant form of biomass on Earth. Enhancement of wood accumulation may be an effective strategy to increase biomass as well as wood strength, but currently only limited research has been undertaken. Here, we demonstrated that OsSWN1, the orthologue of the rice NAC Secon...

Cambial activity is influenced by many environmental and physiological factors and among them, carbon acts as a source of energy for the growing meristems. This work has focused on the intra-annual stem growth of poplar compared with the carbon available for xylogenesis processes in cambium and outer wood. The major stages of xylem production and differentiation in two poplar genotypes with dif...

Thermal modification is an attractive alternative to improve the decay durability and dimensional stability of wood. However, thermally modified wood is generally not resistant to termite attacks, limiting the field of application of such materials. One way to overcome this drawback is to combine thermal modification treatment with an additional treatment. One such treatment is the impregnation...

This study aims to improve the value of fast-growing wood and extend heat-treated utilization using inorganic calcium carbonate (CaCO3) crystals via an in-situ synthesis method. CaCl2 Na2CO3 solutions with a concentration ratio 1:1 were successively introduced into thermally modified poplar obtained by steam heat treatment (HT) at 200°C for 1.5 3 h, resulting in CaCO3 inside wood. The filling e...

The cambial K+ content of poplar increases during the growth period in a K+ supply dependent manner. Upon K+ starvation or application of tetraethylammoniumchloride (TEA+), a K+ channel blocker, the average vessel lumen and expansion zone area were significantly reduced. In search for the molecular basis of potassium-dependent xylogenesis in poplar, K+ transporters homologous to those of known ...

influences of temperature as well as holding time on physical and mechanical properties of fir wood were studied in this work during the oleothermal wood modification. wood samples were cut and treated oleothermally in the soybean oil at 200 and 230°c for the holding time of 1, 3 and 5 hours. weights and the dimensions were measured before and after treatment. bending strengths, water absorptio...

10 Liquefaction of ligno-cellulosic biomass is one of the chemical conversion technologies for 11 developing new materials, adhesives and energy systems. The liquefaction process also 12 provides an opportunity to utilize ligno–cellulosic wastes such as saw-dust, woody wastes, 13 branches and twigs, agro-residues, etc. for the development of value added products. This 14 paper presents the liqu...