We monitored the enzymatic hydrolysis on thin films of cellulose, in situ and real time by using a piezoelectric sensing device (Quartz Crystal Microbalance, QCM) and Surface Plasmon Resonance (SPR). Cellulose thin films were deposited on piezoelectric resonators using spin coating technique. Films of different crystallinity were also prepared by using self assembly of cellulose-thiol derivativ...

The FTIR spectra, SEM-EDXA and copper adsorption capacities of the raw plant materials, alkali-treated straws and cellulose xanthogenate derivatives of Eichhornia crassipes shoot, rape straw and corn stalk were investigated. FTIR spectra indicated that of the three plant materials, the aquatic biomass of E. crassipes shoot contained more OH and CO groups which accounted for the higher Cu(2+) ad...

1. The extracellular enzymes present in the culture filtrates of Coniophora cerebella grown on various carbohydrate carbon sources were investigated. Enzymes that degraded cellulose derivatives, hemicellulose fractions, starch, laminarin, pectin and several oligosaccharides were detected. 2. All the polysaccharide-degrading activities were adaptive except for that acting on laminarin. 3. The cu...

Observation of changes in fluidity is presented as a method for following the enzymatic hydrolysis of soluble cellulose derivatives. The activity of different cell-free enzyme preparations may be compared by this method, providing certain precautions are observed. In general, results obtained by use of the fluidity method are similar to those obtained using the reducing sugar technique, indicat...

Cellulose is an attractive candidate as a feedstock for sustainable bioenergy because of its global abundance. Pretreatment of biomass has significant influence on the chemical availability of cellulose locked in recalcitrant microfibrils. Optimizing pretreatment depends on an understanding of its impact on the microscale and nanoscale molecular architecture. X-ray scattering experiments have b...

The interactions between polystyrene latex particles and ethyl cellulose (EC) with different functionalization pattern have been investigated. 3-Mono-O-EC and EC with statistical functionalization pattern in the anhydroglucose units were studied in aqueous solutions and dispersions. EC belongs to a group of polymers that phase separate upon heating. The two types of EC showed large differences ...

The conversion of enzymes into water-insoluble products possessing specific catalytic activity is of interest, since such water-insoluble enzyme derivatives can readily be removed from the reaction mixture and can be used for the preparation of columns with enzymatic activity. When stable, they can be employed repeatedly to induce specific chemical changes in relatively large amounts of substra...

In this study, two kinds of cellulose derivatives (polyanionic cellulose (PAC) and hydroxypropylmethyl cellulose (HPMC)) were selected as stabilizers of Pd/Fe nanoparticles (NPs) to investigate their influences on the debromination performances of 2,2',4,4'-tretrabromodiphenyl ether (BDE47). Field emission scanning electron microscope (FE-SEM) images revealed that the cellulose-stabilized Pd/Fe...

The spectral absorption of th in fi lms of cellulose acetate, regenerated cellulose, t he a ce tate and regenerated cellulose after oxid ation with nitrogen d ioxide gas, a nd t he regenerated cell ulose after oxida tion with periodic acid followed by chlorous aci d, a re recorded fo r the infra red from 2 to 15 mi Cl'Ons and the ultraviolet from 215 to 400 mill imicrons. T he regenerated cellu...

Cellulose-based materials have been advanced technologies that used in water remediation. They exhibit several advantages being the most abundant biopolymer nature, high biocompatibility, and contain functional groups. Cellulose can be prepared derivatives including nanomaterials such as cellulose nanocrystals (CNCs), nanofibrils (CNFs), TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-medi...