Results 31 to 40 of about 3,267 (117)

Quantitative FT-IR Analysis for Chondritic Meteorites: Search for C_60 in Meteorites [PDF]

Journal of Astronomy and Space Sciences, 1998
Infrared absorption spectra of 9 bulk samples and 3 acid residues of meteorites were obtained in the mid-infrared region (4000 ~ 400 cm^(-1)). From the known composition of meteorites studied, the possible absorption modes were investigated.
Chunglee Kim, Jongmann Yang
doaj  

A Portable Magnetometer for Magnetic Measurements of Meter‐Sized Meteorites

Geochemistry, Geophysics, Geosystems, 2020
Meteorites contain records of past magnetic fields in the form of natural remanent magnetization (NRM). A key property of meteorite magnetization that provides information about its origin is its dependence on spatial scale.
Elise Clavé, Clara Maurel, Eduardo A. Lima, Jay Shah, Elias N. Mansbach, Minoru Uehara, Benjamin P. Weiss   +6 more
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The stellar origins of 96Zr excesses in presolar graphites from the Murchison meteorite

Astronomy & Astrophysics
Context. Zirconium-96 is a stable isotope that can be synthesized under different neutron-rich nucleosynthetic conditions. Astrophysical models predict its production to occur in various stellar environments: from low-to-intermediate-mass asymptotic ...
Pal I., Jadhav M., Shulaker D. Z., Raiwa M., Savina M. R., Bouillion H., Pignatari M., Roberti L., Lugaro M., Szányi B., Karakas A., Denissenkov P., Herwig F., Dory C. J., Gyngard F., Kita N., Amari S.   +16 more
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Shock-transformation of whitlockite to merrillite and the implications for meteoritic phosphate

Nature Communications, 2017
Quantifying the amount of water in meteorites remains challenging, with minerals the key to understanding water contents. Here, Adcocket al. perform shock experiments on H+-bearing whitlockite demonstrating that it may transform into anhydrous merrillite,
C. T. Adcock, O. Tschauner, E. M. Hausrath, A. Udry, S. N. Luo, Y. Cai, M. Ren, A. Lanzirotti, M. Newville, M. Kunz, C. Lin   +10 more
doaj   +1 more source

Laser Induced Breakdown Spectroscopy for Elemental Analysis in Environmental, Cultural Heritage and Space Applications: A Review of Methods and Results

Sensors, 2010
Analytical applications of Laser Induced Breakdown Spectroscopy (LIBS), namely optical emission spectroscopy of laser-induced plasmas, have been constantly growing thanks to its intrinsic conceptual simplicity and versatility.
Alessandro De Giacomo, Giorgio S. Senesi, Olga De Pascale, Rosalba Gaudiuso, Marcella Dell’Aglio   +4 more
doaj   +1 more source

Classification of stony meteorites and chondrules – the case of meteorite Jesenice

Geologija, 2012
In the first part of the paper there is a description about genesis of meteorites, in particularly about stony meteorites– chondrites, since meteorite Jesenice is an ordinary L chondrite. Chondrules represent main part of the mass ofchondritic meteorites.
Bojan Ambrožič, Sašo Šturm, Miha Jeršek, Breda Mirtič   +3 more
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Study of the Extraterrestrial Materials at Antarctica, IV. : On the Yamato Meteorites

Antarctic Record, 1974
Additional mineralogical and chemical studies of the Yamato meteorites are under way. The mode analysis and the optical properties in thin sections are examined under a microscope.
Makoto SHIMA, Akihiko OKADA, Masako SHIMA   +2 more
doaj   +1 more source

Viroids-First—A Model for Life on Earth, Mars and Exoplanets

Geosciences, 2019
The search for extraterrestrial life, recently fueled by the discovery of exoplanets, requires defined biosignatures. Current biomarkers include those of extremophilic organisms, typically archaea.
Karin Moelling, Felix Broecker
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Comprehensive report of the BELARE 2022-2023 meteorite reconnaissance expedition in the Sør Rondane area, East Antarctica

Antarctic Record, 2023
We provide a comprehensive overview of a reconnaissance expedition aimed at identifying new possible meteorite stranding zones in the surrounding of the Belgian Princess Elisabeth Antarctica (PEA) station in the Sør Rondane Mountains during the BELARE ...
Vinciane Debaille, Maria Schönbächler, Maria Valdes, Ryoga Maeda, Manu Poudelet, Steven Goderis, Philipp R. Heck, Veronica Tollenaar, Harry Zekollari, Philippe Claeys   +9 more
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A Model Study on the Dynamics of the Amino Acid Content in Micrometeoroids during Atmospheric Entry

Chemistry, 2020
A model for the survival of the amino acid content in micrometeorites and its possible transformations upon atmospheric entry is described. Since any organic species released in the atmosphere at high altitudes would exhibit a limited lifetime with ...
Carlo Canepa
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