A5003391767- Advanced Polymer Synthesis and Characterization
- Surfactants and Colloidal Systems
- Rheology and Fluid Dynamics Studies
- Polymer Nanocomposites and Properties
- Analytical Chemistry and Chromatography
- Drug Solubulity and Delivery Systems
- Analytical Chemistry and Sensors
- Mass Spectrometry Techniques and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Polymer crystallization and properties
- Hydrogels: synthesis, properties, applications
- Conducting polymers and applications
- Material Dynamics and Properties
- Polymer Surface Interaction Studies
- Dendrimers and Hyperbranched Polymers
- Adsorption, diffusion, and thermodynamic properties of materials
- Fuel Cells and Related Materials
- Phase Equilibria and Thermodynamics
- Polysaccharides Composition and Applications
- Advanced Combustion Engine Technologies
- Material Properties and Processing
- Electron Spin Resonance Studies
- Protein purification and stability
- Electrostatics and Colloid Interactions
- Synthetic Organic Chemistry Methods
University of Chemistry and Technology, Prague
2023
Czech Academy of Sciences, Institute of Macromolecular Chemistry
2009-2021
Czech Academy of Sciences
1986-2009
Czech Academy of Sciences, Institute of Chemical Process Fundamentals
2007
Indian Institute of Technology Madras
1998
National Institute on Aging
1998
National Institutes of Health
1998
Alginate gels are an outstanding biomaterial widely applicable in tissue engineering, medicine, and pharmacy for cell transplantation, wound healing efficient bioactive agent delivery, respectively. This contribution provides new comprehensive insight into the atomic-resolution structure dynamics of polyvalent ion-cross-linked alginate microbead formulations. By applying various advanced solid-state NMR (ssNMR) spectroscopy techniques, we verified homogeneous distribution cross-linking ions...
With regard to speed, comfort, and a dense network of destinations, the popularity air transport is on rise. For this reason, jet fuel commodity with rapidly growing consumption interesting refinery margins. At same time, however, it becoming focus attention in terms reducing negative environmental impacts. As response these trends, will be necessary coprocess alternative petroleum fractions sustainable aviation components oil refineries. Six samples different origin were used investigate...
The role of the β-93 cysteine residue in hemoglobin autoxidation process has been delineated by electron paramagnetic resonance. At low temperatures (8 K) after incubation at 235 K, free radical signals were detected. An analysis spectrum produced implies that, besides superoxide expected to be formed during autoxidation, an isotropic is with a giso 2.0133. This g value consistent that for sulfur radical. Blocking sulfhydryl group N-ethylmaleimide was found eliminate formation radical, but...
Plausible calf-thymus DNA molecular weight distribution can be obtained by size-exclusion chromatography with dual low-angle light scattering/refractometric detection at sufficiently low flow rate. The extends over three decades of and is characterized average Mw = 8418000 polydispersity index Mw/Mn 5.2. After strongly scattering impurities had been removed from the sample using adsorption properties 3 μm mixed-cellulose-ester filter membranes, static light-scattering measurement in...
We report on the tailor-made polymer conjugates, which are highly compelling for biomedical applications due to their antioxidant activity and adjustable thermosensitive properties.
A series of polyallylcarbosilane dendrimers and carbosilane-based dendritic polyols up to third generation was analyzed by means matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry multinuclear NMR spectroscopy determine the character, origin, number structural defects. Besides occasionally reported α-hydrosilylation, several side reactions accompanying hydrosilylation, such as isomerization terminal double bonds, were detected during synthesis...
A general relationship is derived for the abundance of an imperfect dendrimer with a given number missing constitutional repeating units in two outmost layers. The used interpretation MALDI TOF mass spectrum second-generation carbosilane prepared by iterative divergent method. model quantitatively describes and correctly predicts its first-generation precursor. Thus, use well-resolved spectra assessing purity low-generation dendrimers uniform end groups substantiated to lesser extent general.
Carbosilane metallodendrimers containing substituted titanocene dichloride end groups were prepared using hydrosilylation as the capping reaction. Two complementary pathways followed: of ω-alkenyl-substituted complexes with Si–H bond terminated dendrimers and vinyl dendritic materials 3-(dimethylsilyl)propyl-substituted dichloride. The former procedure provided first generation four units second eight units. latter method gave dendrititic wedges up to 16 peripheral molecular weight 7070 Da....
Summary Due to the limited resolution of matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry, assignment binary‐copolymer composition peak molecular weight observed in spectrum is not unique. Consequently, several clusters, called fingerprints, appear on calculated 2‐D distribution, but usually only one them corresponds sample composition. The ambiguity peaks spectra binary copolymers was explained framework number theory and criteria for identification correct...
Abstract Doubly labeled poly(methacrylic acid) (PMA) samples with two different concentrations of carbazole and anthracene labels were prepared, one sample was divided into fractions molecular weight. Emission spectra recorded in solutions without added salt, at ionic strengths 0,05 0,40 a 2 : 1 water‐methanol mixture, as function pH. The nonradiative energy transfer (NET) from donor to acceptor decayed the PMA coils expanded. On mixing buffer varying strength water or aqueous methanol...
A low-molecular-weight organic semiconducting material was prepared by the redox interaction between pyrrole and <italic>p</italic>-benzoquinone.
Abstract This article describes the synthesis and characterization of new amphiphilic polymer conetworks containing hydrophilic poly(methacrylic acid) (PMAA) or poly(acrylic (PAA) hydrophobic polyisobutylene (PIB) chains. These were prepared by a two‐step synthesis. In first step, cationic copolymer isobutylene (IB) 3‐isopropenyl‐α,α‐dimethylbenzyl isocyanate (IDI) was prepared. The groups IB–IDI random subsequently transformed in situ to methacrylate (MA) reaction with 2‐hydroxyethyl...