Results 11 to 20 of about 441 (171)

The UCLA Cosmochemistry Database [PDF]

Scientific Data, 2023
The UCLA Cosmochemistry Database was initiated as part of a data-rescue and -storage project aimed at archiving a variety of cosmochemical data acquired at University of California, Los Angeles (UCLA).
Bidong Zhang, Kerstin A. Lehnert, Alan E. Rubin, Kevin D. McKeegan, Paul H. Warren, Jennifer L. Mays, Lucia R. Profeta, Annika K. Johansson, Peng Ni, Edward D. Young, Frank T. Kyte, Ming-Chang Liu, Emilie T. Dunham, Haolan Tang, Peng Ji, Juan D. Figueroa-Salazar   +15 more
doaj   +4 more sources

An investigation of the internal morphology of asbestos ferruginous bodies: constraining their role in the onset of malignant mesothelioma [PDF]

Particle and Fibre Toxicology, 2023
Background Asbestos is a fibrous mineral that was widely used in the past. However, asbestos inhalation is associated with an aggressive type of cancer known as malignant mesothelioma (MM).
Maya-Liliana Avramescu, Christian Potiszil, Tak Kunihiro, Kazunori Okabe, Eizo Nakamura   +4 more
doaj   +2 more sources

Magnetic Domain Texture in Fe₃O₄ Thin Films on SiO₂ Nanospheres. [PDF]

Adv Mater
Fe3O4 thin films grown on ordered SiO2 nanospheres form curved nanocaps with 3D geometry, inducing magnetic domain texture. X‐ray spectromicroscopy (XMCD‐PEEM), cross‐sectional electron microscopy (STEM), and polarized grazing‐incidence small‐angle neutron scattering (GISANS) reveal how topography modulates magnetization.
Hamed MH, Xu Y, Elnaggar H, Zaghloul M, Mio AM, Backs A, Stellhorn A, Lima VO, Yin C, Bednarski-Meinke C, Steinke NJ, Petracic O, Brückel T, Saerbeck T, Qdemat A.   +14 more
europepmc   +2 more sources

Chemical Geodynamics of Granitoid Magmatism During a Pacific‐Philippine Sea Plate Transition in Southwest Japan

Geochemistry, Geophysics, Geosystems
Granitoid magmatism along the western Pacific margin records interactions between subduction dynamics and crust–mantle processes; however, the links between plate reorganization and magma‐source evolution remain debated.
Nghiem V. Dao, Tsegereda A. Yemer, Tulibako T. Mwaisuba, Chie Sakaguchi, Hiroshi Kitagawa, Katsura Kobayashi, Teruyoshi Imaoka, Eizo Nakamura   +7 more
doaj   +2 more sources

Evaluation of Matrix Effects in SIMS Using Gaussian Process Regression: The Case of Olivine Mg Isotope Microanalysis. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Matrix effects by secondary ion mass spectrometry (SIMS) are empirically corrected by calibration using matrix‐matched reference materials. However, conventional parametric regression cannot estimate the prediction uncertainty to account for the difference in compositions of new data and reference materials. Applying Gaussian process
Itano K, Fukuda K, Kita NT, Ueki K, Kuwatani T, Akaho S.   +5 more
europepmc   +2 more sources

Constraining Earth’s core composition from inner core nucleation [PDF]

Nature Communications
The composition of Earth’s core is a fundamental property of the Earth’s deep interior, defining its present structure and long term thermal and magnetic evolution. However, the composition of the core is not well understood, with several combinations of
Alfred J. Wilson, Christopher J. Davies, Andrew M. Walker, Dario Alfè   +3 more
doaj   +2 more sources

Alternative Pathways in Astrobiology: Reviewing and Synthesizing Contingency and Non-Biomolecular Origins of Terrestrial and Extraterrestrial Life [PDF]

Life
The pursuit of understanding the origins of life (OoL) on and off Earth and the search for extraterrestrial life (ET) are central aspects of astrobiology.
Kuhan Chandru, Christian Potiszil, Tony Z. Jia   +2 more
doaj   +2 more sources

The kerogen vanadyl porphyrins: Incorporation during catagenesis [PDF]

Journal of the Serbian Chemical Society, 1999
Natural vanadyl (VO 2+)-deoxophylloerythroetioporphyrins (DPEP) have been shown to be capable of reacting and quantitatively incorporating into immature kerogen model materials (torbanite, lignites, subbituminous coal and immature lacustrine ...
Premović Pavle I., Tonsa Ivana R., Đorđević Dragan M., Premović Miroslav P.   +3 more
doaj   +1 more source

Geochemistry of the cretaceous-tertiary transition boundary at Blake Nose (N. W. Atlantic): Cosmogenic Ni [PDF]

Journal of the Serbian Chemical Society, 2004
The Cretaceous-Tertiary (KT) boundary transition at the Blake Nose Plateau recovered by ODP Leg 171B (site 1049, hole A, core 17X, section 2) contains an ejecta bed (thickness ca. 17 cm) marking a late Cretaceous asteroid impact.
Premović Pavle I., Nikolić Nikola D., Pavlović Mirjana S., Panov Katja I.   +3 more
doaj   +1 more source

Fourier transform infrared and electron spin resonance examinations of kerogen from the gunflint stromatolitic cherts (Middle Precambrian, Ontario, Canada) and related materials [PDF]

Journal of the Serbian Chemical Society, 2000
Kerogen occurrences in stromatolitic cherts from the Middle Precambrian Gunflint Formation and related rocks have been investigated by the use of elemental analysis, Fourier transform infrared and electron spin resonance spectroscopies ...
Premović Pavle I., Nikolić Goran S., Premović Miroslav P., Tonsa Ivana R.   +3 more
doaj   +1 more source