A5032883433- Analytical chemistry methods development
- Iron oxide chemistry and applications
- Analytical Chemistry and Sensors
- Heavy metals in environment
- Mine drainage and remediation techniques
- Mercury impact and mitigation studies
- Electrochemical Analysis and Applications
- Radioactive element chemistry and processing
- German Social Sciences and History
- Allergic Rhinitis and Sensitization
- Plant Micronutrient Interactions and Effects
- Clay minerals and soil interactions
- Sociology and Education Studies
- Trace Elements in Health
- Extraction and Separation Processes
- Ionic liquids properties and applications
- Phytase and its Applications
- Banana Cultivation and Research
- Forest Management and Policy
- Phosphorus and nutrient management
- Asthma and respiratory diseases
- Pesticide Residue Analysis and Safety
- Agriculture and Biological Studies
- Immune Response and Inflammation
- Geochemistry and Elemental Analysis
BOKU University
2010-2021
University of Göttingen
2014
University of Bonn
1996-2013
We report on the long-term effects of degrading magnesium implants bone tissue in a growing rat skeleton using continuous vivo micro-Computed Tomography, histological staining and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). Two different alloys—one rapidly (ZX50) one slowly (WZ21)—were used to evaluate response distribution released Mg Y ions femur male Sprague-Dawley rats. Regardless whether alloy degrades or slowly, we found that recovers restitutio ad integrum...
Several hydrophobic long-chain quaternary ammonium and phosphonium ionic liquids (ILs) with functionalized aromatic anions were prepared following a metathesis route using tricaprylmethylammonium chloride (Aliquat 336) trihexyl(tetradecyl)phosphonium (Cyphos IL101) as precursors. The incorporation of bearing hydroxy-, methoxy-, thiol-, thioether functionalities well tetraphenylborate resulted in an increased chemical stability the ILs alteration their physico-chemical properties....
Summary A sample of goethite was mixed for periods which ranged from 2 hours to 8 weeks with solutions dilute nitrate salts Pb, Hg, Cd, Zn, Cu, Ni, Co, Mn, Cr and Al. The amount sorption after each period measured an appropriate pH range metal. behaviour characterized both by using characteristics the curves such as at half added metal sorbed (pH 50 ) fitting a model in mainly affinity constant diffusion constant. Initial sorption, whether or constant, closely correlated dissociation...
Precise and accurate quantification of Ag platinum group elements in marine, estuarine riverine waters is challenging due to the complex matrices ultra-low concentrations pmol kg− 1 fmol range. A methodological approach has been developed for analysis Pt seawater based on extraction their anionic chloro-complexes utilizing strong anion exchange resin Dowex™ 1-× 8 an off-line matrix separation pre-concentration prior determination by ICP-SFMS. The method allows simultaneous processing four...
Summary A multidomain goethite was analysed with atomic force microscopy (AFM) to obtain information about the size and shape of pores on surface, which are important for sorption processes cations anions. Wedge‐shaped > 100 nm long at surface occurred domain boundaries. They were 20‐30 wide, becoming narrower towards interior crystals 2 less. The AFM showed these be least 4–6 deep. suggests that smaller continue much further into crystals. Besides irregularities between domains, randomly...
Regenerative repair is a promising new approach in treating damaged intervertebral discs. An experimental scheme was established for autologous and/or allogenic after massive disc injury.Disc healing promoted 11 animals by injecting vitro expanded autologous/homologous cells 2 weeks stab injury of lumbar discs L1-2. The following control were used our sheep model: L2-3, vehicle only; L3-4, L4-5, undamaged; and from four non-experimental animals. Disc suspended biologically supportive...
We compared rates of desorption heavy metals from goethite, an important soil constituent, in order to understand the mechanisms sorption and better. Samples goethite were reacted with salt solutions for 2 hours or 8 weeks. The Cr, Mn, Co, Ni, Cu, Zn, Cd Pb. Desorption was then induced by successive treatments 0.7 m HNO 3 up 360 followed complete dissolution particles. After brief (2 hours), a large proportion sorbed desorbed treatment (15 minutes) . This suggests that mainly on, close to,...
Phytosiderophores (PS) form stable complexes with various transition metals. These ligands are exuded by the roots of graminacous plants as a mechanism for mobilizing and acquiring soil iron. To investigate iron mobilization transport, novel LC method in combination ESI-MS/MS determination three Fe(III)-complexes mugineic acid (MA), 2'-epi-MA 2'-deoxymugineic (DMA) has been developed. Liquid chromatographic separation was realized using silica-based mixed-mode reversed phase/weak-anion...
A novel method based on high-performance ion chromatography inductively coupled plasma mass spectrometry employing strong anion exchange with HNO3 gradient elution for simultaneous analysis of orthophosphate and myo-inositol hexakisphosphate (IP6 ) in soil solution plant extracts is presented. As phosphorus at m/z 31 hampered by N-based interferences, (31)P was measured as (31)P(16)O(+) 47 dynamic reaction cell technique O2 gas. Orthophosphate IP6 were separated within a total...
This review discusses the application of on-line strategies for sample treatment prior to atomic spectrometric detection.
Summary Seven different samples of goethite with differing crystallinity were prepared and the rate reaction six metal ions was measured for up to 4 weeks. The used were: Cu 2+ , Pb Cd Mn Ni Cr 3+ . For decreasing crystallinity, therefore increasing porosity, increased reaction. In contrast, there no effect. Hydrothermal treatment, which induce ‘healing’ in one goethites, did not prevent continuing It decreased but had effect on This suggests that main route is via pores, by lattice...
Precise and accurate determination of Hg in surface water is challenging due to volatilization adsorption effects low ng L−1 concentrations. The aim our study was examine the parameters, which affect uncertainty concentrations determined by CV-ICP-MS, employing isotope dilution analysis for quantification. We used two different types mass spectrometers (MC-ICP-SFMS ICP-QMS) further evaluated widely approaches achieve data with uncertainties ultra trace level water. Obtained LODs were...
In this work, we introduce a high-throughput quantitative multi-element method for biological fluids enabled by omitting sample preparation and an analysis time of few seconds per sample. For the first time, flow injection undiluted cerebrospinal fluid (CSF) was combined to state-of-the-art ICP-TOFMS detection analysis. Owing low volume trace element concentrations CSF, methods with only 5 μL intake were used in combination icpTOF 2R TOF-based ICP-MS instrument. Due lack certified reference...
Though not regulated in directives such as the Water Framework Directive of European Union, investigation geogenic background concentrations certain elements precious metals is increasing interest, particular for early detection a potential environmental pollution due to increased use various industrial and technological applications medicine. However, precise accurate quantification natural waters challenging complex matrices ultra-low (sub-) ng L
Abstract 389Humans are responsible for nearly seventy thousand wildfires in the US each year, and human-caused fires have burned more than 2 million acres five of past ten years. Wildfires a major contributor to greenhouse gas emissions, adding 126.4 metric tons carbon dioxide into atmosphere year. These emissions can be significantly reduced with improved wildfire management strategies. This research examines connection between fire proximity physical characteristics, criminal activities,...