A5068919357- Climate change and permafrost
- Cryospheric studies and observations
- Peatlands and Wetlands Ecology
- Health and Medical Studies
- Occupational exposure and asthma
- Contact Dermatitis and Allergies
- Heavy Metal Exposure and Toxicity
- Tree-ring climate responses
- Trace Elements in Health
- Carcinogens and Genotoxicity Assessment
- Indoor Air Quality and Microbial Exposure
- Soil Carbon and Nitrogen Dynamics
- Sarcoidosis and Beryllium Toxicity Research
- Workplace Health and Well-being
- Health and Wellbeing Research
- Viral Infections and Immunology Research
- Methane Hydrates and Related Phenomena
- Social Policies and Healthcare Reform
- Childhood Cancer Survivors' Quality of Life
- Sociology and Education Studies
- Plant Taxonomy and Phylogenetics
- Aluminum toxicity and tolerance in plants and animals
- Biomedical and Chemical Research
- Mercury impact and mitigation studies
- Digital Innovation in Industries
Stockholm University
2022-2023
Universität Hamburg
2012-2022
University Medical Center Hamburg-Eppendorf
2020
Federal Institute for Occupational Safety and Health
2013
Gesundheitsdienst
2005
Gesundheitsamt
2005
Soil organic matter bound to soil minerals contribute long-term carbon and nutrient sequestration by protecting from rapid microbial decomposition. However, the binding between can be weakened plant root exudates enhancing potential for additional CO2 emissions. Root contain low molecular weight acids that might promote release stimulating decomposition of (priming) or directly weathering minerals. The vulnerability mineral-associated is particularly significant at higher latitudes where...
The Arctic is warming rapidly, causing permafrost thaw and vegetation shifts. As a result, shrubs trees from lower latitudes are encroaching into the tundra, altering biomass distribution above below ground. These changes impact greenhouse gas (GHG) emissions by influencing litter input, root distribution, microbial activity. A key mechanism in GHG production soils rhizosphere priming effect, where labile carbon inputs plants soil stimulate microorganisms to produce enzymes that decompose...
Arctic warming is facilitating the encroachment of trees into tundra landscapes. Trees at forest-tundra ecotone are typically small, slow-growing and show high mortality rates. Tree necromass enters soil as root, leaf stem litter. This material can be decomposed or contribute to long-term organic matter stocks, well change decomposition native (priming). We here tested whether processes under dying spruce in soils a controlled laboratory experiment. The opportunity for addressing this...
Rapid expansion of deciduous shrubs and evergreen trees on the Arctic tundra could induce large losses soil carbon stocks through increased rhizosphere priming. Through use isotopic molecular techniques, we investigated whether belowground cycling differed between three plant species that are encroaching Canadian tundra. 13CO2 pulse chase labelling showed dwarf (Betula glandulosa) had faster turnover recent 13C-photosynthates than tall (Alnus viridis) black spruces (Picea Mariana)....
Permafrost-affected tundra soils are large carbon (C) and nitrogen (N) reservoirs. However, N is largely bound in soil organic matter (SOM), ecosystems generally have low availability. Therefore, microbial induced N-cycling processes losses were considered negligible. Recent studies show that processing rates, inorganic availability, lateral from thawing permafrost increase when vegetation cover disturbed, resulting reduced uptake or increased input permafrost. In this review, we describe...
Background: Workers on dredgers and lighters rivers are potentially exposed to a variety of substances. Aims: To determine the internal load heavy metals arsenic as well levels cytogenetic markers in workers river silt aerosols. Methods: One hundred were examined up eight times within three years. Additionally, 100 control studied once. Blood samples analysed for lead, mercury, cadmium. micronuclei frequency sister chromatid exchange (SCE) rates determined. Urinary cadmium, nickel, chromium,...
Ice–rich Pleistocene permafrost deposits (Yedoma) store large amounts of nitrogen (N) and are susceptible to rapid thaw. In this study, we assess whether eroding Yedoma potential sources N gaseous carbon (C) losses. Therefore, determined aerobic net ammonification nitrification, as well anaerobic production nitrous oxide (N2O), dioxide (CO2), methane (CH4) in laboratory incubations. Samples were collected from non-vegetated revegetated slump floor (SF) thaw mound (TM) soils a retrogressive...
<p>Previous research was addressed to carbon emissions after permafrost thaw, but less attention paid changes in nitrogen availability and N<sub>2</sub>O particular data from the Russian Arctic are scarce. Rise water temperature sea-level contribute coastal erosion accelerating thaw rates release of dissolved nitrogen. Already 78% regions Laptev Sea affected by rapid thaw. This study estimates whether eroded coasts hotspots for N further understand...
Currently, 20% of the Northern Hemisphere is affected by thermokarst, with an increase expected in future. In particular, ice-rich Yedoma sediments are susceptible to abrupt thaw, which leads formation retrogressive thaw slumps (RTS). These erosion processes result loss vegetation, expose long-term frozen permafrost at surface, and makes soil organic matter (SOM) available for mineralization. Permafrost-affected soils RTS exhibited higher N availability, as indicated δ15N content...
Poisonings by heavy metals are rare, nowadays. Nevertheless they exist. Some carcinogenic, such as chromium, nickel, and arsenic. Other harmful to blood lead or kidney (cadmium). The central nervous system may be damaged e.g. manganese. These other adverse effects of described well the pathologic origin therapy intoxication. Furthermore environmental influences on metal content in human urine described, uptake cadmium smokers, arsenic mercury due fish consumption.
Nach Operation einer Ösophagusatresie kann es zu Komplikationen durch gestörte Ösophagusfunktion und Trachealinstabilität kommen. Wir berichten über den Langzeitverlauf eines Patienten, bei dem rezidivierende Episoden mit Dysphagie, Stridor, Apnoe, Zyanose Bradykardie in unterschiedlichen klinischen Schweregraden auftraten. Wiederholt durchgeführte diagnostische Abklärungen deckten verschiedene Pathomechanismen auf. Entsprechend wurde das therapeutische Konzept mehrfach geändert....