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Small shards and long distances — three cryptotephra layers from the Nahe palaeolake including the first discovery of Laacher See Tephra in Schleswig‐Holstein (Germany)
(
- Journal of Quaternary Science
, 2020-12-13)
Investigations of Lateglacial to Early Holocene lake sediments from the Nahe palaeolake (northern Germany) provided a high‐resolution palynological record. To increase the temporal resolution of the record a targeted search ...
Facilitated crystal handling using a simple device for evaporation reduction in microtiter plates
(
- Journal of Applied Crystallography
, 2021-01-29)
In the past two decades, most of the steps in a macromolecular crystallography experiment have undergone tremendous development with respect to speed, feasibility and increase of throughput. The part of the experimental ...
Hidden in plain sight: A microanalytical study of a Middle Stone Age ochre piece trapped inside a micromorphological block sample
(
- Geoarchaeology
, 2020-12-15)
A complete Middle Stone Age ochre piece was unintentionally collected and fully preserved within a micromorphological block sample intended to characterise a 74 ± 3 ka occupation horizon at Blombos Cave, South Africa. ...
Crystal structure of a calcium(II)–pyrroloquinoline quinone (PQQ) complex outside a protein environment
(
- Acta Crystallographica Section C
, 2020-11-05)
Pyrroloquinoline quinone (PQQ) is an important cofactor of calcium‐ and lanthanide‐dependent alcohol dehydrogenases, and has been known for over 30 years. Crystal structures of Ca–MDH enzymes (MDH is methanol dehydrogenase) ...
Oxygen Vacancy Substitution Linked to Ferric Iron in Bridgmanite at 27 GPa
(
- Geophysical Research Letters
, 2020)
Ferric iron can be incorporated into the crystal structure of bridgmanite by either oxygen vacancy substitution (MgFeO2.5 component) or charge-coupled substitution (FeFeO3 component) mechanisms. We investigated the ...
X-ray diffraction from strongly bent crystals and spectroscopy of X-ray free-electron laser pulses
(
- Acta Crystallographica Section A
, 2019)
The use of strongly bent crystals in spectrometers for pulses of a hard X-ray free-electron laser is explored theoretically. Diffraction is calculated in both dynamical and kinematical theories. It is shown that diffraction ...
Compound-Specific Radiocarbon Analysis of (Sub-)Antarctic Coastal Marine Sediments—Potential and Challenges for Chronologies
(
- Paleoceanography and Paleoclimatology
, 2020)
In Antarctic and Subantarctic environments, 14C-based age determination is often challenging due to unknown reservoir effects, low organic carbon contents of sediments, and high contributions of petrogenic (14C-free) carbon ...
Iterative thermodynamic modelling—Part 1: A theoretical scoring technique and a computer program (bingo-antidote)
(
- Journal of Metamorphic Geology
, 2020)
This paper introduces the software solution bingo-antidote for thermodynamic calculations at equilibrium based on iterative thermodynamic models. It describes a hybrid strategy combining the strength of Gibbs energy ...
Influence of soil structure on the spread of Pseudomonas fluorescens in soil at microscale
(
- European Journal of Soil Science
, 2020)
For over a half a century, researchers have been aware of the fact that the physical and chemical characteristics of microenvironments in soils strongly influence the activity, growth and metabolism of microorganisms. ...
EXEQ and InEXEQ: software tools for experiment planning at the Extreme Environment Diffractometer
(
- Journal of Applied Crystallography
, 2020)
The Extreme Environment Diffractometer was a neutron time-of-flight instrument equipped with a constant-field hybrid magnet providing magnetic fields up to 26 T. The magnet infrastructure and sample environment imposed ...