The hydroxymethylation of alkali lignin with formaldehyde in alkaline solution was studied. The influence of reaction conditions of the hydroxymethylation of alkali lignin was followed by modifying the temperature, time, and the ratios of NaOH to lignin and CH2O to…

Maritime pine (Pinus pinaster) wood has low dimensional stability and durability. Heat treatment was made in an oven using hot air during 2 to 24 h and at 170-200 ºC. A comparison was made against steam heat treatment. The equilibrium…

Novel uses of the organic fraction of municipal solid wastes for diversified technological applications are reported. A humic acid-like substance (cHAL2) isolated from green urban wastes was tested as a chemical auxiliary for fabric cleaning and dyeing, and as a…

This work presents a state estimator for a continuous bioprocess. To this aim, the Non Linear Filtering theory based on the recursive application of Bayes rule and Monte Carlo techniques is used. Recursive Bayesian Filters Sampling Importance Resampling (SIR) is…

This paper evaluates and discusses multifactor non-linear, statistical dependencies of drill side-edges recession VBK and drill diameter recession DW on the cutting path length LC, the content of hard mineral contaminants CMC, the size of contaminant particles SMC, and the…

The use of ionic liquids (ILs) in the field of cellulose chemistry opens up a broad variety of new opportunities. Besides the regeneration of the biopolymer to fibers, films, and beads, this new class of cellulose solvents is particularly useful…

Traditional chemical industry depends on non-renewable fossil resources and is now facing great challenges. Lignocellulosic materials are the most abundant renewable resources in the world, and their efficient utilization provides a practical route to maintain sustainable development of chemical industry.…

In this paper the dependencies of the degree of surface burning and intensity during disc sanding perpendicular to the wood grains of Fagus silvatica L. were examined for several machining parameters. Significant impacts of sanding load, thickness, and width of…

Mechanical compression and electrolyte infusion of wood, pyrolysis and chemical activation of charcoals have resulted in enhanced abilities absorb lead ion and benzene from model polluted water solutions. Iodine number and methylene blue indeces also reveal enhancement of surface activity.…

In this paper a dependence of the main cutting force upon several machining parameters by wood of black locust (Robinia pseudoaccacia L.) during straight turning was graphically illustrated and analyzed. Evidence for several interactions was found based on multi-factor nonlinear…