Suche
Anzeige der Dokumente 171-180 von 567
XGANDALF – extended gradient descent algorithm for lattice finding
(
- Acta Crystallographica Section A
, 2019-08-30)
Serial crystallography records still diffraction patterns from single, randomly oriented crystals, then merges data from hundreds or thousands of them to form a complete data set. To process the data, the diffraction ...
Sources of Uncertainty in Regional and Global Terrestrial CO2 Exchange Estimates
(
- Global Biogeochemical Cycles
, 2020)
The Global Carbon Budget 2018 (GCB2018) estimated by the atmospheric CO
2 growth rate, fossil fuel emissions, and modeled (bottom-up) land and ocean fluxes cannot be fully closed, leading to a “budget imbalance,” highlighting ...
Does Export Production Measure Transient Changes of the Biological Carbon Pump's Feedback to the Atmosphere Under Global Warming?
(
- Geophysical Research Letters
, 2020-11-20)
In a widely‐held conception, the biological carbon pump (BCP) is equal to the export of organic matter out of the euphotic zone. Using global ocean‐atmosphere model experiments we show that the change in export production ...
One‐Pot Synthesis of Xanthate‐Functionalized Cellulose for the Detection of Micromolar Copper(II) and Nickel(II) Ions
(
- CLEAN – Soil, Air, Water
, 2019-09-23)
A one‐pot synthesis and application of cellulose‐based sensors to efficiently detect various toxic metal ions in aqueous solutions in micromolar quantities is reported. Cellulose microfibers have been functionalized with ...
Dating Deep-Sea Sediments With 230Th Excess Using a Constant Rate of Supply Model
(
- Paleoceanography and Paleoclimatology
, 2019)
We present a dating method for deep-sea sediments that uses the natural radionuclide 230Th (half-life 75,380 years) in analogy to 210Pb with the constant rate of supply (CRS) model. Using an example from the western Indian ...
Influence of Ocean Circulation and Benthic Exchange on Deep Northwest Atlantic Nd Isotope Records During the Past 30,000 Years
(
- Geochemistry, Geophysics, Geosystems
, 2019)
Neodymium (Nd) isotopes extracted from authigenic sediment phases are increasingly used as a proxy for past variations in water mass provenance. To better constrain the controls of water mass provenance and nonconservative ...
Classification of CM chondrite breccias—Implications for the evaluation of samples from the OSIRIS-REx and Hayabusa 2 missions
(
- Meteoritics & Planetary Science
, 2020)
CM chondrites are complex impact (mostly regolith) breccias, in which lithic clasts show various degrees of aqueous alteration. Here, we investigated the degree of alteration of individual clasts within 19 different CM ...
Dynamic Compressive Strength and Fragmentation in Felsic Crystalline Rocks
(
- Journal of Geophysical Research: Planets
, 2020)
Brittle deformation in rocks depends upon loading rate; with increasing rates, typically greater than ~102 s−1, rocks become significantly stronger and undergo increasingly severe fragmentation. Dynamic conditions required ...
Comparative Evaluation of Different MOF and Non‐MOF Porous Materials for SO2 Adsorption and Separation Showing the Importance of Small Pore Diameters for Low‐Pressure Uptake
(
- Advanced Sustainable Systems
, 2021-02-11)
The search for adsorbents for flue gas desulfurization processes is a current interest. For the first time, a comparative experimental study of SO2 adsorption by porous materials including the prototypical metal–organic ...
10Be/9Be Ratios Reveal Marine Authigenic Clay Formation
(
- Geophysical Research Letters
, 2020-02-10)
As reverse weathering has been shown to impact long‐term changes in atmospheric CO2 levels, it is crucial to develop quantitative tools to reconstruct marine authigenic clay formation. We explored the potential of the ...