Abstract In this work, we produced composites of mesoporous silica synthesized in-situ on never-dried bleached eucalyptus kraft pulp fibers with the aim providing cost-effective depth filters, having high flux, and adsorptivity. The loading for samples was in range 12–35 wt%. performance double-layer membranes studied adsorption charged molecules. best nanofibrillated cellulose-pulp-mesoporous ...

Abstract In this work, the efficiency of a polyelectrolyte complex (PEC) to retain different cellulose micro/nanofibers (CMNFs) during paper formation and improve physical properties recycled unbleached fiber was analyzed. CMNFs were obtained from commercial bleached eucalyptus pulp (BEP) using PFI refiner followed by chemical treatment with oxalic acid at two concentrations. Finally, fibrillat...

In the present study, reported the generation and analysis of ESTs of cDNA libraries from cambium tissue of secondary xylem obtained of two genotypes of Eucalyptus globulus contrasting in wood density and pulp yield. The sequences were blasted and annotated to compare with genome and ESTs database of other plant species. The goal of study was to determinate wich genes was differentially express...

Autohydrolysis of Eucalyptus globulus was conducted at three different intensity levels typical for prehydrolysis kraft pulping as utilized for manufacturing dissolving pulp grades. The objective was to establish for the autohydrolysis process a detailed mass balance comprising the chemical composition of all three phases: the autohydrolysate, the released gas, and the solid residue. Carbohydra...

The worldwide expansion of hybrid breeding and clonal forestry is to meet the demands of paper pulp and bioenergy. Although India was one of the pioneers in hybrid production of eucalypts only recently the hybrid clonal forestry is gaining momentum. Inter-specific hybrids are being produced to exploit the hybrid vigor of F1 individuals. Quality control genotyping for hybrid purity and parentage...

The antioxidant activity of the phenolic compounds present in industrial black liquors obtained from the two cooking processes (kraft and sulphite) used in Portugal to produce Eucalyptus globulus pulp was evaluated. The black liquors treated at several pH values were extracted with ethyl acetate. Phenolic fractions were further separated by liquid chromatography of the crude extracts of kraft l...

Background Cellulose is an important biopolymer produced by all plants and is used in a number of different industries, including for pulp and paper production. Cellulose is deposited into the plant cell wall by a large membranebound protein complex, which is composed of different cellulose synthase (CESA) proteins. The cellulose content and pattern of deposition in plant cell walls is highly v...

A new laccase (EC 1.10.3.2) produced by Streptomyces cyaneus CECT 3335 in liquid media containing soya flour (20 g per liter) was purified to homogeneity. The physicochemical, catalytic, and spectral characteristics of this enzyme, as well as its suitability for biobleaching of eucalyptus kraft pulps, were assessed. The purified laccase had a molecular mass of 75 kDa and an isoelectric point of...

Cigarette paper is the wrapping material surrounding the tobacco to form a cigarette rod. Cigarettes can be made from tobacco, filter cigarette paper and filter papers. Filter papers contain plug wrap papers and tipping papers. The permeability range of the highly porous plug wrap papers is one of their most important properties. In addition, other properties, such as mass (g/m), breaking lengt...