Results 71 to 80 of about 110,450 (295)

Toarcian oceanic anoxic event: An assessment of global causes using belemnite C isotope records [PDF]

, 2005
Two hypotheses have been proposed to explain simultaneous large negative excursions (up to 7% PeeDee belemnite) in bulk carbonate (delta(13)C(carb)) and organic carbon isotope records (delta(13)C(org)) from black shales marking the Toarcian oceanic ...
Bailey, TR, McArthur, JM, Miller, KG, Rosenthal, Y, van de Schootbrugge, B, Wright, JD   +5 more
core   +1 more source

Topology‐Aware Machine Learning for High‐Throughput Screening of MOFs in C8 Aromatic Separation

Advanced Intelligent Discovery, EarlyView.
We screened 15,335 Computation‐Ready, Experimental Metal–Organic Frameworks (CoRE‐MOFs) using a topology‐aware machine learning (ML) model that integrates structural, chemical, pore‐size, and topological descriptors. Top‐performing MOFs exhibit aromatic‐enriched cavities and open metal sites that enable π–π and C–H···π interactions, serving as ...
Yu Li, Honglin Li, Jialu Li, Wan‐Lu Li
wiley   +1 more source

In situ Sr isotope measurement of small glass samples using multiple-Faraday collector inductively coupled plasma mass spectrometry with 10^12Ω resistor high gain Faraday amplifiers [PDF]

, 2014
An analytical protocol was developed for correcting Kr baseline-induced bias and Rb isobaric overlap factors to analyse Sr isotope ratios for small glass samples using excimer laser ablation (LA) with an Aridus II desolvating nebuliser dual-intake system
CHANG, Qing, KIMURA, Junichi, VAGLAROV, Bogdan, VAGLAROV, Bogdan, 常, 青, 木村, 純一   +5 more
core   +1 more source

Boron and Molybdenum Isotope Evidence for Source‐Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya

Geochemistry, Geophysics, Geosystems, 2023
The origins of Cenozoic granites in the Himalaya are key to understanding the evolution of the Himalayan orogen. However, it is unclear whether these granites represent primary melts, and the nature of their magma source is controversial.
Jing‐Jing Fan, Qiang Wang, Gang‐Jian Wei, Jie Li, Lin Ma, Xiu‐Zheng Zhang, Zi‐Qi Jiang, Jin‐Long Ma, Jin‐Sheng Zhou, Qi‐Wei Li, Zi‐Long Wang, Xiao Liu, Tong‐Yu Huang, Miao‐Yan Zhang   +13 more
doaj   +1 more source

Northwestern Central American Volcanic Arc: Increased contribution of enriched lithosphere to lavas along the volcanic front from Nicaragua to Guatemala and behind the volcanic front [PDF]

, 2010
The Central American Volcanic Arc (CAVA) has been subject of intensive research over the past decades, leading to a large variety of different models for the origin of CAVA lavas with various source components.
Hauff, Folkmar, Heydolph, Ken, Hoernle, Kaj, van den Bogaard, Paul   +3 more
core  

Sr ISOTOPES AND ROMAGNA WINES: AN OPPORTUNITY FOR BETTER TRADING?

EQA, 2011
La composition isotopique du Sr a été mesurée dans 11 vins de Romagne, parce que la détermination de ce paramètre peut être utile à tracer l’origine des produits pour une meilleure commercialisation. Les 87Sr mesurés se sont avérés homogènes au sein d'une faible amplitude de valeurs (-0.07 et +0.33 o/oo), en accord avec la provenance des raisins d’une ...
CASTORINA, Francesca, Umberto Masi
openaire   +3 more sources

Radium Speciation in Simulated Digestive Biofluids: Insights from Electrospray Ionization Mass Spectrometry and Thermodynamic Modeling

Analysis &Sensing, EarlyView.
Electrospray ionization mass spectrometry (ESI‐MS) combined with thermodynamic modeling provides the first direct characterization of radium speciation in synthetic gastrointestinal biofluids. Free Ra2+ ions predominate with minimal protein binding and negligible EDTA complexation. Crown ethers enable effective Ra complexation.
Linus Holtmann, Tim Schmalz, Tobias Weissenborn, Felix Stäger, Beate Riebe, Clemens Walther   +5 more
wiley   +1 more source

Snapshots of an Evolving Solar Nebula Recorded in Nucleosynthetic Sr and Ba Signatures of Early Condensates

The Astrophysical Journal Letters
The discovery of extreme strontium isotope anomalies ( μ ^84 Sr) in refractory leachates from Allende fine-grained calcium-aluminum-rich inclusions (CAIs) is at odds with long-standing predictions regarding the homogenization of presolar components in ...
R. T. C. Marquez, B. L. A. Charlier, F. L. H. Tissot   +2 more
doaj   +1 more source

Isotope Effect in the Superfluid Density of HTS Cuprates: Stripes, Pseudogap and Impurities

, 2005
Underdoped cuprates exhibit a normal-state pseudogap, and their spins and doped carriers tend to spatially separate into 1- or 2-D stripes. Some view these as central to superconductivity, others as peripheral and merely competing.
G. V. M. Williams, J. L. Tallon, J. R. Cooper, J. Storey, J. P. Franck, R. S. Islam, W. D. Allen   +6 more
core   +1 more source

Innovative Approach to Hydrogen Purification: A Review on the Role of Metal Hydrides

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Metal hydrides, renowned for their unique hydrogen bonding capabilities, have emerged as pivotal materials in the energy sector, particularly for hydrogen storage and purification applications. Their ability to store hydrogen reversibly under moderate conditions has positioned them at the forefront in hydrogen‐based energy systems. This review
T. Mohammed Faheem, Vinod Kumar Sharma, A. Shaija, Bhaskar Das, Ranjith Krishna Pai   +4 more
wiley   +1 more source