A5087686832- Enzyme-mediated dye degradation
- Lignin and Wood Chemistry
- Epoxy Resin Curing Processes
- Dyeing and Modifying Textile Fibers
- Polymer composites and self-healing
- biodegradable polymer synthesis and properties
- Thermal and Kinetic Analysis
- Silicone and Siloxane Chemistry
- Microbial Metabolism and Applications
- Natural Fiber Reinforced Composites
- Material Properties and Processing
- Advanced Polymer Synthesis and Characterization
- Spectroscopy and Chemometric Analyses
- Polymer Nanocomposites and Properties
- Cultural Heritage Materials Analysis
- Analytical Chemistry and Chromatography
- Polymer crystallization and properties
- Synthesis and properties of polymers
- Biochemical and biochemical processes
- Photopolymerization techniques and applications
- Melamine detection and toxicity
- Microplastics and Plastic Pollution
- Mesoporous Materials and Catalysis
- Advanced Cellulose Research Studies
- Electrochemical sensors and biosensors
Reutlingen University
2015-2024
BOKU University
2008-2024
Johannes Kepler University of Linz
2019
Kompetenzzentrum Holz
2006-2014
Graz University of Technology
2001-2007
FunderMax (Austria)
2006-2007
University of Graz
2000
ABSTRACT A screening for dye-decolorizing alkali-thermophilic microorganisms resulted in a Bacillus sp. strain isolated out of the wastewater drain textile finishing company. An NADH-dependent azoreductase this strain, SF, was found to be responsible decolorization azo dyes. This enzyme purified by combination ammonium sulfate precipitation and anion-exchange affinity chromatography had molecular mass 61.6 kDa an isoelectric point at pH 5.3. The optimum depended on substrate within range pHs...
Abstract Decolorization of textile dyes by a laccase from Trametes modesta immobilized on γ‐aluminum oxide pellets was studied. An enzyme reactor equipped with various UV/Vis spectroscopic sensors allowing the continuous online monitoring decolorization reactions. dye solutions followed via an immersion transmission probe. Adsorption processes were observed using diffuse reflectance measurements solid carrier material. Generally, immobilization does not seem to sterically affect...
ABSTRACT Melamine–formaldehyde (MF) resins are widely used as adhesives and finishing materials in the wood industry. During resin cure, either methylene ether or bridges formed, leading to formation of a three‐dimensional network. Not only curing degree, but also chemical species present cured determine quality final product. Analytical methods allowing detailed investigation network great benefit manufacturers. In work, cure an MF precondensate is studied at different temperatures (100–200...
Abstract The preparation of an industrially used sequential formulation a melamine–urea–formaldehyde resin was followed with Fourier transform infrared (FTIR). analysis allowed us to identify the increases and decreases main groups in compare this system results previously obtained by 13 C‐NMR analysis. FTIR analysis, although considerably more limited than nonetheless follow appearance, increase, decrease, disappearance several chemical during initial urea–formaldehyde (UF) phase reaction...
A new laccase was purified from Trametes hirsuta IMA2002. The had a molecular mass of 62 kDa and an isoelectric point pH 7. It optimum 3.0 temperature 55°C. quite stable at 30°C 4.0 with half-life more than 100 hours. On ABTS, syringaldazide, DMP the showed KM Kcat values 75, 12 37 μM 64, 83 54 s−1, respectively. structurally diverse commercial dyes Indigo Carmine, Lanaset Blue 2R, Diamond Black PV 200 Fast Brown were oxidized by laccase. While rate extent decolorization latter dye...
Neutrophilic polymorphonuclear leukocytes play a crucial role in the host defence against bacterial and fungal infections. They participate inflammatory response through liberation of peptides enzymes like myeloperoxidase (MPO). Therefore, MPO has potential as marker enzyme for diagnosis wound infection.Substrate specificities reaction pathways were investigated new substrates: crystal violet, leuco fast blue RR (4-benzoylamino-2,5-dimethoxybenzenediazonium chloride hemi(zinc chloride) salt)...
Comparative analysis of the chemical and rheological curing kinetics formaldehyde-based wood adhesives is crucial for assessing their respective performance. Differential scanning calorimetry (DSC) rheometry are conventional techniques used monitoring processes leading to crosslinking polymerization adhesives. However, direct comparison these inappropriate due intrinsic differences in underlying procedures. To address this challenge, two adhesive samples were sequentially cured, firstly with...
Monitoring of molding processes is one the most challenging future tasks in polymer processing. In this work, situ monitoring curing behavior highly filled EMCs (silica filler content ranging from 73 to 83 wt%) and effect load on kinetics are investigated. Kinetic modelling using Friedman approach was applied real-time process data obtained DEA measurements, these online kinetic models were compared with analysis offline DSC measurements. For an autocatalytic fast-reacting material be...
An epoxy compound’s polymer structure can be characterized by the glass transition temperature (Tg) which is often seen as primary morphological characteristic. Determining Tg after manufacturing thermoset-molded parts an important objective in material characterization. To characterize quantitatively dependence of on degree cure, DiBenedetto equation usually used. Monitoring network formation during molding processes therefore one most challenging tasks processing and achieved using...
Abstract Laccase‐catalyzed grafting of functional molecules on wood surface presents an eco‐friendly opportunity to improve properties. In a novel stepwise approach, were bound enzymatically modified containing anchor groups. As groups, phenolic amines coupled lignin moieties using the 62 kDa Trametes hirsuta laccase. The coupling reaction was mimicked model compounds 4‐ O ‐methyl guaiacylglycerol β‐guaiacyl ether A , E dehydrodivanillyl alcohol type dibenzodioxocin D and syringylglycerol...