Pretreated coconut fibers can be applied as renewable damping components in fiber-reinforced cement mortars to reduce the adverse effects of vibration and promote recycling waste fibers. In this study, FT-IR, TG, XRD, SEM measurements were performed analyze morphologies physicochemical properties before after pretreatment. The compressive strength, porosity, tested study fiber pre-treatment on ...

BACKGROUND There is still considerable debate regarding the actual mechanism by which a "cellulase mixture" deconstructs cellulosic materials, with accessibility to the substrate at the microscopic level being one of the major restrictions that limits fast, complete cellulose hydrolysis. In the work reported here we tried to determine the predominant mode of action, at the fiber level, of how a...

A facile method is reported to prepare nanocellulose fibers from oil palm trunk fibers. The fibers were pretreated 2 hours with NaOH/urea solution, and the fully swelled fibers were mechanically treated through highpressure homogenization to obtain nanocellulose. The nanocellulose fibers were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), ther...

High-resolution atomic force microscopy (AFM) was used to image the real-time in situ degradation of crystalline by three types of T. reesei cellulolytic enzymes-TrCel6A, TrCel7A, and TrCel7B-and their mixtures. TrCel6A and TrCel7A are exo-acting cellobiohydrolases processing cellulose fibers from the nonreducing and reducing ends, respectively. TrCel7B is an endoglucanase that hydrolyzes amorp...

BACKGROUND Saccharification and fermentation of pretreated lignocellulosic materials, such as spruce, should be performed at high solids contents in order to reduce the cost of the produced bioethanol. However, this has been shown to result in reduced ethanol yields or a complete lack of ethanol production. Previous studies have shown inconsistent results when prehydrolysis is performed at a hi...

The focus of this work was to investigate the cellulose acetate (CA)–viscose (CV) interface in an all-cellulosic compound and evaluate feasibility hydrophobic CA-coatings on viscose fibers. Mechanical strengths foil-CA compounds were investigated by recoding stress-to-strain curves. For equivalent strain, composites generate higher stress than pure CA samples. coating CV fibers, fibers pretreat...

A novel expansin protein (ScExlx1) was found, cloned and expressed from the Basidiomycete fungus Schizophylum commune. This protein showed the canonical features of plant expansins. ScExlx1 showed the ability to form "bubbles" in cotton fibers, reduce the size of avicel particles and enhance reducing sugar liberation from cotton fibers pretreated with the protein and then treated with cellulase...

This study aimed to assess the effect of mechanical pretreatment on bleached eucalyptus kraft pulp fibers and investigate influence reaction time temperature properties yield nanocrystalline cellulose (NCC) microcrystalline (MCC). Two types pulps were hydrolyzed, 1 (control, whole fibers) 2 (mechanically pretreated, disintegrated fibers). NCC MCC particles obtained by sulfuric acid hydrolysis (...

We studied the role of the anticholinergic properties of disopyramide and quinidine in mediating the electrophysiological effects of these agents on isolated cardiac tissue. In right atria, disopyramide, quinidine, and procainamide administered alone elicited negative chronotropic responses. However, after cholinergic stimulation with physostigmine (1 X 10" M), disopyramide and quinidine produc...