A5101864603- Analytical chemistry methods development
- Mass Spectrometry Techniques and Applications
- Analytical Chemistry and Chromatography
- X-ray Spectroscopy and Fluorescence Analysis
- Calcium Carbonate Crystallization and Inhibition
- Nuclear Physics and Applications
- Diatoms and Algae Research
- Microfluidic and Capillary Electrophoresis Applications
- Fermentation and Sensory Analysis
- Surfactants and Colloidal Systems
- Hydrogen Storage and Materials
- Catalytic Cross-Coupling Reactions
- Laser-induced spectroscopy and plasma
- Magnesium Alloys: Properties and Applications
- Marine Sponges and Natural Products
- Semiconductor materials and interfaces
- Cultural Heritage Materials Analysis
- Chemical Synthesis and Analysis
- Coal and Its By-products
- Organometallic Complex Synthesis and Catalysis
- Coal and Coke Industries Research
- Lignin and Wood Chemistry
- Algal biology and biofuel production
- Polymer Surface Interaction Studies
- Radioactive element chemistry and processing
TU Bergakademie Freiberg
2019-2025
Leibniz University Hannover
2005-2025
University of Kassel
2024
Bochum University of Applied Sciences
2018
Institute of Inorganic Chemistry of the Slovak Academy of Sciences
2016
Leipzig University
1994-2009
Leibniz Association
2002
Hamburg University of Technology
2000
Leibniz Institute for Solid State and Materials Research
2000
Universität Hamburg
2000
The influence of amount intermetallics on the degradation as-extruded Mg-Nd alloys with different contents Nd was investigated via immersion testing in DMEM+10% FBS under cell culture conditions and subsequent microstructural characterizations. It is found that presence intermetallic particles Mg41Nd5 affects corrosion two conflicting ways. One their negative role existence enhances micro-galvanic corrosion. Another positive role. Their favours formation a continuous compact layer. At early...
Highly rectifying Ag, Au, Pd, and Pt Schottky contacts have been fabricated on heteroepitaxial pulsed-laser deposited ZnO-thin films by reactive sputtering. X-ray photoelectron spectroscopy revealed an oxidation of the contact material; gold are purely metallic. The necessity a conductive capping oxidized is proven photocurrent measurements AgxO contacts. ideality factors effective barrier heights were determined current-voltage measurements. Capacitance-voltage temperature dependent...
The effects of micro-addition (0.2 wt.%) Ca, Sr, Ag, In and Cu on the microstructure corrosion properties as-cast Mg-0.5Zn alloy were systematically studied. It is found that grain refinement efficiency intermetallics forming ability differed greatly among these elements. Si impurity also played a vital role in precipitates formation all systems. generally observed Mg-Zn-Ca possessed highest resistance due to refined size, limited uniform corrosion, whereas Mg-Zn-Cu showed rate coarse...
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Abstract In this study, a new pyridinium‐tagged Ru complex was designed and anchored onto sulfonated silica, thereby forming robust highly active supported olefin‐metathesis pre‐catalyst for applications under batch continuous‐flow conditions. The involvement of an oxazine–benzylidene ligand allowed the reactivity formed to be efficiently controlled through both steric electronic activation. oxazine scaffold facilitated introduction pyridinium tag, affording corresponding cationic in good...
The design of new composite materials using extreme biomimetics is crucial importance for bioinspired science. Further progress in research and application these impossible without understanding the mechanisms formation, as well structural features at molecular nano-level. It presents a challenge to obtain holistic underlying interaction organic inorganic phases under conditions harsh chemical reactions biopolymers. Yet, an can lead development unusual-but functional-hybrid materials. In...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelectivity of negative ion chemical ionization mass spectrometry for benzo[a]pyreneL. R. Hilpert, G. D. Byrd, and C. VogtCite this: Anal. Chem. 1984, 56, 11, 1842–1846Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984https://pubs.acs.org/doi/10.1021/ac00275a019https://doi.org/10.1021/ac00275a019research-articleACS PublicationsRequest reuse permissionsArticle...
Structural bioinspiration in modern material science and biomimetics represents an actual trend that was originally based on the bioarchitectural diversity of invertebrate skeletons, specifically, honeycomb constructs natural origin, which have been humanities focus since ancient times. We conducted a study principles bioarchitecture regarding unique biosilica-based honeycomb-like skeleton deep-sea glass sponge Aphrocallistes beatrix. Experimental data show, with compelling evidence,...
Marine sponges were among the first multicellular organisms on our planet and have survived to this day thanks their unique mechanisms of chemical defense specific design skeletons, which been optimized over millions years evolution effectively inhabit aquatic environment. In work, we carried out studies elucidate nature nanostructural organization three-dimensional skeletal microfibers giant marine demosponge Ianthella basta, body is a micro-reticular, durable structure that determines...
Confocal micro-X-ray fluorescence spectroscopy can be performed with laboratory spectrometers for elemental imaging and quantification 3D resolution.
While X-ray diffraction (XRD) is a commonly used method for quantification analysis using Rietveld refinement and quantitative Mössbauer spectroscopy sporadically primarily iron speciation, laboratory Absorption Fine Structure Spectroscopy (lab-XAFS) rarely applied the determination of sample compositions. With recent developments laboratory-based XAFS spectrometers, this becomes more interesting many applications as well quantification. The goal study to compare lab-XAFS via Linear...
By applying high-voltage pulses, a micro-plasma is generated without carrier gas inside the liquid sample enabling optical emission spectroscopy on-site.
This paper presents the application of laboratory X-ray Absorption Fine Structure Spectroscopy (XAFS) in field iron coordination chemistry, especially for compounds with larger organic ligands and usually low contents metal.
Due to the increasing number of application fields using lithium compounds in microelectronics sector, it is necessary investigate contamination influence and effects on silicon oxide. To be able use a controlled manner complementary metal–oxide–semiconductor clean room environments, various diffusion during an important process semiconductor manufacturing, thermal oxidation form oxide, are investigated herein. This includes within wafer, between wafers, into furnace environment. For this...
Nanocellulose- and alginate-based hydrogels have been suggested as potential wound-healing materials, but their utilization is limited by the Food Drug Administration (FDA) requirements regarding endotoxin levels. Cytotoxicity presence of were assessed after gel sterilization using an autoclave UV treatment. A new fingerprinting method was developed to characterize compounds detected in cellulose nanocrystal (CNC)- cellulose-nanofiber (CNF)-based both positive- negative-ion mode electrospray...
Ribonucleotide reduction, the unique step in pathway to DNA synthesis, is catalyzed by enzymes via radical‐dependent redox chemistry involving an array of diverse metallocofactors. The nucleotide reduction gene ( nrdF ) encoding metallocofactor containing small subunit (R2F) Corynebacterium ammoniagenes ribonucleotide reductase was reintroduced into strain C. ATCC 6872. Efficient homologous expression from plasmid pOCA2 using tac ‐promotor enabled purification R2F homogeneity....
An isotope dilution method for the quantitative analysis of trace elements in biological samples and characterization reference materials by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-ID-MS) has been tested.