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Surface engineered carboxymethylchitosan/poly(amidoamine) dendrimer nanoparticl...

Novel highly branched biodegradable macromolecular systems have been developed by grafting carboxymethylchitosan (CMCht) onto low generation poly(amidoamine) (PAMAM) dendrimers. Such structures organize into sphere-like nanoparticles that are proposed to be used as carriers to deliver bioactive molecules aimed at controlling the behavior of stem cells, namely their proliferation and differentiation. The nanopar...

Hydrogen peroxide generation with immobilized glucose oxidase for textile bleac...

Glucose oxidase was covalently immobilized on commercially available alumina and glass supports, with a high level of protein recovery. The operational stability of the alumina carrier was an advantage over the glass support, though the rate of generation of hydrogen peroxide in the case of the latter was higher. The immobilization technique provided repeated application of the enzyme even in low concentration,...

Hydrogen peroxide generation with immobilized glucose oxidase for textile bleac...

Recycling of textile bleaching effluents for dyeing using immobilized catalase

Catalase was immobilized on alumina carrier and crosslinked with glutaraldehyde. Storing stability, temperature and pH profiles of enzyme activity were studied in a column reactor with recirculation and in a batch stirred-tank reactor. The immobilized enzyme retained 44% of its activity at pH 11, 30 °C and 90% at 80 °C, pH 7. The half-life time of the immobilized catalase was increased to 2 h at pH 12, and 60 °...

Studies of stabilization of native catalase using additives

Dyeing with enzymatically treated bleaching effluents

Dyeing in catalase-treated bleaching baths

Effect of temperature and bath composition on the dyeing of cotton with catalas...

Thermo-alkali-stable catalases from newly isolated Bacillus sp. for the treatme...

Three thermoalkaliphilic bacteria, which were grown at pH 9.3–10 and 60–65 °C were isolated out of a textile wastewater drain. The unknown micro-organisms were identified as thermoalkaliphilic Bacillus sp. Growth nditions were studied and catalase activities and stabilities compared. Catalases from Bacillus SF showed high stabilities at 60 °C and pH 9 (t1/2=38 h) and thus this strain was chosen for further inv...

Immobilization of catalases from Bacillus SF on alumina for the treatment of te...

A catalase preparation from a newly isolated Bacillus sp. was covalently immobilized on silanized alumina using glutaraldehyde as crosslinking agent. The effect of the coupling time of the enzyme-support reaction was determined in terms of protein recovery and immobilization yield and a certain balance point was found after which the activity recovery decreased. The activity profile of the immobilized catalase ...