Though carbon (C): nitrogen (N) stoichiometry has been widely studied in terrestrial ecosystems, little is known about its variation following afforestation. By synthesizing the results of 53 studies, we examined temporal and spatial variation in C: N ratios and in N-C scaling relationships of both the organic and the mineral soil horizons. Results showed that C: N ratios remained constant in t...

This paper investigates the juvenility limit and structure–property relationship in secondary quality beech ( Fagus sylvatica L.) oak Quercus petraea (Matt.) Liebl.). The juvenile wood occupies a very small area near pith. stabilization of different parameters varies over time. Adding microfibril angle (MFA) grain to MOE prediction model significantly improves model, despite little variation bo...

DLOUhá, J., ALMÉRAS, T., CLAIR, B., GRIL, J., hORáčEK, p.: Biomechani-cal performances of trees in the phase of active reorientation. Acta univ. agric. et silvic. Mendel. Brun., 2008, LVI, No. 5, pp. 00–00 The purpose of the present paper was to investigate the accumulation of growth stresses in a cross section of a tree in active reorientation process and its biomechanical performances i.e. up...

Abstract Wood is a hygroscopic material that can reach an equilibrium moisture content when ambient temperature and relative humidity are constant. Moisture affects all properties of wood, as well its preservative treatment. The behavior wood be attributed to the hydroxyl groups constituents. Since hemicellulose shows greatest water affinity, it considered main responsible for ingress into mass...

Abstract The use of chemical additives (1- and 2-naphthol, formaldehyde) in hydrothermal pre-treatments pine, birch, willow wood was evaluated to minimize lignin condensation reactions consequently improve the saccharification pre-treated materials. residual hydrolysis lignins were then tested preparation polylactic acid (PLA)-based composites. results showed that addition 2-naphthol pre-treatm...

Abstract Wood modification is an excellent way to improve material properties, prolong service life, and pave the for new applications timber in built environment. The aim of this study establish influence wood species process with phenol urea formaldehyde resin. Seven hardwoods four softwoods were compared identical treatment. Since main variable, provides a clear insight as its on modificatio...

Abstract Predictive monitoring of two key properties nanocellulose, aspect ratio and yield nanofibrillation, would help manufacturers control optimize production processes, given the uncertainty that still surrounds their influential factors. For that, 20 different types cellulosic lignocellulosic micro/nanofibers produced from spruce pine softwoods, by pre-treatment fibrillation techniques, we...