A5029056552- Atmospheric chemistry and aerosols
- Indoor Air Quality and Microbial Exposure
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Advanced biosensing and bioanalysis techniques
- Atmospheric and Environmental Gas Dynamics
- Allergic Rhinitis and Sensitization
- Pharmaceutical and Antibiotic Environmental Impacts
- Pesticide and Herbicide Environmental Studies
- Biosensors and Analytical Detection
- Atmospheric Ozone and Climate
- Microbial Community Ecology and Physiology
- Electrochemical Analysis and Applications
- Odor and Emission Control Technologies
- Air Quality Monitoring and Forecasting
- Arctic and Antarctic ice dynamics
- Microbial bioremediation and biosurfactants
- Methane Hydrates and Related Phenomena
- Zoonotic diseases and public health
- Mycotoxins in Agriculture and Food
- Agriculture Sustainability and Environmental Impact
- Clay minerals and soil interactions
- Nanoparticles: synthesis and applications
- Plant and fungal interactions
- Oil Spill Detection and Mitigation
Aarhus University
2016-2025
California Institute for Biomedical Research
2022
Danmarks Nationalbank
2010
University of California, Davis
1984-1986
Antibacterial formulations based on zinc oxide nanoparticles (ZnO NPs) are widely used for antibiotic replacement in veterinary medicine and animal nutrition. However, the undesired environmental impact of ZnO NPs triggers a search alternative, environmentally safer solutions. Here, we show that Zn2+ its ionic form is more eco-friendly antibacterial, biocidal action rivals (<100 nm size), with minimal concentration being 41(82) μg mL–1 vs 5 NPs, as determined 103(106) CFU E. coli. We...
Recently, concerns have been raised that residues of glyphosate-based herbicides may interfere with the homeostasis intestinal bacterial community and thereby affect health humans or animals. The biochemical pathway for aromatic amino acid synthesis (Shikimate pathway), which is specifically inhibited by glyphosate, shared plants numerous species. Several in vitro studies shown various groups bacteria be differently affected glyphosate. Here, we present results from an animal exposure trial...
The Arctic is undergoing dramatic climatic changes that cause profound transformations in its terrestrial ecosystems and consequently the microbial communities inhabit them. assembly of these affected by aeolian deposition. However, abundance, diversity, sources activity airborne microorganisms are poorly understood. We studied bacteria atmosphere over southwest Greenland found diversity bacterial correlated positively with air temperature negatively relative humidity. consisted 1.3×103 ±...
The study of airborne bacteria relies on a sampling strategy that preserves their integrity and in situ physiological state, e.g. viability, cultivability, metabolic activity, ice-nucleation activity. Because ambient air harbors low concentrations bacteria, an effective bioaerosol sampler should have high efficiency airflow. We characterize high-flow-rate impinger with respect to particle collection retention efficiencies the range 0.5–3.0 μm, we investigated its ability preserve state...
An ultralight aircraft was equipped with atmospheric monitoring instruments and flown above Copenhagen on the 17 June 2022 to measure a range of aerosol parameters meteorology. Three flights were carried out from sunrise early afternoon aim capture boundary layer structure evolution due surface warming, emissions city, mixing. The data show clear evidence which expanded 400–600 m in height at around 07:30 1200–1400 by 14:30. Additionally, residual observed morning, an entrainment pollution...
Low-cost sensors (LCS) have emerged as versatile tools for air quality monitoring across diverse applications. This presentation synthesizes some of our work and findings from multiple projects, demonstrating the adaptability effectiveness LCS in various scenarios.We investigated usefulness low-cost continuous particle exposure a tool workplace interventions. Through systematic study four companies, we benchmarked performance against reference-grade equipment realistic environment settings....
Pathogen-associated infections represent one of the major threats to human health and require reliable methods for immediate robust identification pathogenic microorganisms. Here, an inexpensive cellulase-linked immunomagnetic methodology was developed specific ultrasensitive analysis bacteria at their single-cell levels within a 3 h procedure. Detection model bacterium, Escherichia coli, performed in sandwich reaction with E. coli-specific either aptamer or antibody (Ab)-modified magnetic...
Abstract. Aerosol hygroscopic growth and cloud droplet formation influence the radiation transfer budget of atmosphere thereby climate. In Arctic, these aerosol properties may have a more pronounced effect on climate compared to midlatitudes. Hygroscopic condensation nuclei (CCN) concentrations high Arctic aerosols were measured during two field studies in spring summer 2016. The study site was Villum Research Station (Villum) at Nord northeastern region Greenland. with tandem differential...
Prevention of food spoilage, environmental bio-contamination, and pathogenic infections requires rapid sensitive bacterial detection systems. Among microbial communities, the strain Escherichia coli is most widespread, with non-pathogenic strains being biomarkers contamination. Here, we have developed a fM-sensitive, simple, robust electrocatalytically-amplified assay facilitating specific E.coli 23S ribosomal rRNA, in total RNA sample, after its site-specific cleavage by RNase H enzyme....
Acoustic Harassment Devices (AHD) are widely used to deter marine mammals from aquaculture depredation, and pile driving operations that may otherwise cause hearing damage. However, little is known about the behavioural physiological effects of these devices. Here, we investigate responses harbour porpoises (Phocoena phocoena) a commercial AHD in Danish waters. Six were tagged with suction-cup-attached DTAGs recording sound, 3D-movement, GPS (n = 3) or electrocardiogram 2). They then exposed...
Abstract A fast and sensitive method to determine urease activity in soils is described. It involves extraction of NH4‐N with 1 N. KC1 : 0.01 N HC1 measurement NH4 concentration by electroconductivity using a steady state flow system across membrane. Sampling was done directly from the extracts an automatic sampler at 40 samples per hour. The detection limit for below 0.05 ppm extract. Extracts could be stored room temperature 17 hours before measuring NH4. No post‐treatment hydrolysis urea occured.
Pathogen-triggered infections are the most severe global threat to human health, and provide their timely treatment prevention, robust methods for rapid reliable identification of pathogenic microorganisms required. Here, we have developed a fast inexpensive electrocatalytic aptamer assay enabling specific ultrasensitive detection E. coli. coli, biomarker environmental contamination infections, was captured on mixed aptamer/thiolated PEG self-assembled monolayers formed electrochemically...
A substance with phosphatase activity was isolated from a field soil. The isolation procedure involves two steps. First ammonium humates are formed by intermittent shaking of soil in 1.0 N acetate (pH 7.0) for 20 h. They extracted repeated rinsing distilled water, after the has been removed filtration. filtrate is dialyzed and freeze-dried. Then active part humic substances decomplexation 17.0 mM tetramethyl-p-phenylenediamine (TMePDA). accounted 3.2% soil's activity. During freeze-drying...