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Disentangling the Impact of Catchment Heterogeneity on Nitrate Export Dynamics From Event to Long‐Term Time Scales
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- Water Resources Research
, 2021-01-12)
Defining effective measures to reduce nitrate pollution in heterogeneous mesoscale catchments remains challenging when based on concentration measurements at the outlet only. One reason for this is our limited understanding ...
Direct‐Push Color Logging Images Spatial Heterogeneity of Organic Carbon in Floodplain Sediments
(
- Journal of Geophysical Research: Biogeosciences
, 2020-12-10)
In soils and sediments, large amounts of total organic carbon (TOC) mark reducing conditions. As dark sediment colors are good predictors for high‐TOC zones, they indicate hot spots of biogeochemical turnover and microbial ...
Detectability of Artificial Ocean Alkalinization and Stratospheric Aerosol Injection in MPI‐ESM
(
- Earth's Future
, 2020-10-24)
To monitor the success of carbon dioxide removal (CDR) or solar radiation management (SRM) that offset anthropogenic climate change, the forced response to any external forcing is required to be detectable against internal ...
Storm Event–Driven Occurrence and Transport of Dissolved and Sorbed Organic Micropollutants and Associated Effects in the Ammer River, Southwestern Germany
(
- Environmental Toxicology and Chemistry
, 2020-11-30)
Storm events lead to agricultural and urban runoff, to mobilization of contaminated particulate matter, and to input from combined sewer overflows into rivers. We conducted time‐resolved sampling during a storm event at ...
Sampling, separation, and quantification of N‐acyl homoserine lactones from marine intertidal sediments
(
- Limnology and Oceanography: Methods
, 2021-01-20)
N‐acyl homoserine lactones (AHLs) are molecules produced by many Gram‐negative bacteria as mediators of cell‐cell signaling in a mechanism known as quorum sensing (QS). QS is widespread in marine bacteria regulating diverse ...
The copper(II)‐binding tripeptide GHK, a valuable crystallization and phasing tag for macromolecular crystallography
(
- Acta Crystallographica Section D
, 2020-12-02)
The growth of diffraction‐quality crystals and experimental phasing remain two of the main bottlenecks in protein crystallography. Here, the high‐affinity copper(II)‐binding tripeptide GHK was fused to the N‐terminus of a ...
Cation distribution in Cu2ZnSnSe4, Cu2FeSnS4 and Cu2ZnSiSe4 by multiple‐edge anomalous diffraction
(
- Acta Crystallographica Section B
, 2020-12-07)
Multiple‐Edge Anomalous Diffraction (MEAD) has been applied to various quaternary sulfosalts belonging to the adamantine compound family in order to validate the distribution of copper, zinc and iron cations in the structure. ...
Deformation microstructures
(Univ. Bremen, 2007)
Ice, microstructures, subgrain boundaries, recrystallization, flow, deformation. - The primary objective of this thesis is the investigation of microstructures obtained from samples from the EPICA Dronning Maud Land ice ...
The polymict carbonaceous breccia Aguas Zarcas: A potential analog to samples being returned by the OSIRIS‐REx and Hayabusa2 missions
(
- Meteoritics & Planetary Science
, 2021-02-02)
On April 23, 2019, a meteorite fall occurred in Aguas Zarcas, Costa Rica. According to the Meteoritical Bulletin, Aguas Zarcas is a brecciated CM2 chondrite dominated by two lithologies. Our X‐ray computed tomography (XCT) ...
Small‐angle X‐ray scattering from GaN nanowires on Si(111): facet truncation rods, facet roughness and Porod's law
(
- Acta Crystallographica Section A
, 2020-12-24)
Small‐angle X‐ray scattering from GaN nanowires grown on Si(111) is measured in the grazing‐incidence geometry and modelled by means of a Monte Carlo simulation that takes into account the orientational distribution of the ...