Results 41 to 50 of about 1,179,358 (368)

Connections Between Nuclear Physics and the Origin of Life - Examining the Origin of Biomolecular Chirality [PDF]

EPJ Web of Conferences, 2020
The discovery of bio-molecules in meteorites with an excess of one chiral state has created one of the biggest questions in astrobiology today. That is, what is the origin of bio-molecular homochirality?
Famiano Michael, Boyd Richard, Kajino Toshitaka, Chiba Satoshi, Mo Yirong, Onaka Takashi, Suzuki Toshio   +6 more
doaj   +1 more source

Remarkably high abundance of presolar grains in interplanetary dust particles collected from the comet Grigg-Skjellerup dust stream [PDF]

, 2007
Isotopic studies of IDPs collected from the comet Grigg-Skjellerup dust stream reveal extremely high abundances of presolar grains in two of four IDPs. These abundances exceed those of any other extraterrestrial material analyzed and support a cometary ...
Busemann, H., Nguyen, A. N., Nittler, L. R.   +2 more
core  

Influence of Gamma-Ray Emission on the Isotopic Composition of Clouds in the Interstellar Medium [PDF]

, 2011
We investigate one mechanism of the change in the isotopic composition of cosmologically distant clouds of interstellar gas whose matter was subjected only slightly to star formation processes.
A. A. Abdo, A. G. Pavlov, A. M. Ghez, A. N. Gorbunov, A. N. Gorbunov, A. T. Varfolomeev, A. V. Ivanchik, B. J. Carr, B. L. Berman, B. Nilson, B. Nilson, C. J. Akerman, D. A. Varshalovich, D. D. Faul, D. D. Faul, D. M. Skopik, D. M. Skopik, D. Romano, D. S. Balser, F. Balestra, F. D’Ammando, G. Steigman, G. Ticcioni, H. Bethe, J. A. Galey, J. B. Warren, J. D. Irish, J. K. Webb, J. L. Linsky, J. R. Stewart, K. Y. Hara, M. A. Famiano, M. Casse, M. J. Balbes, M. J. Reid, M. Kawasaki, M. Kusakabe, M. Pettini, M. Rugers, N. Prantzos, N. Yu. Gnedin, P. F. Michelson, P. L. Nolan, P. Martini, R. Bosch, R. C. Hartman, R. I. Dzhibuti, R. N. Boyd, S. Burles, S. Naito, T. M. Bania, T. P. Walker, T. Shima, T. Shima, V. N. Fetisov, V. Schonfelder, V. V. Klimenko, Y. Birenbaum, Ya. B. Zel’dovich, Yu. A. Akulov, Yu. M. Arkatov, Yu. M. Arkatov, Yu. M. Arkatov, Yu. M. Arkatov, Yu. M. Arkatov   +64 more
core   +1 more source

Carbonate abundances and isotopic compositions in chondrites

, 2013
We report the bulk C abundances, and C and O isotopic compositions of carbonates in 64 CM chondrites, 14 CR chondrites, 2 CI chondrites, LEW 85332 (C2), Kaba (CV3), and Semarkona (LL3.0).
C. M. Alexander, R. Bowden, M. Fogel, K. Howard   +3 more
semanticscholar   +1 more source

Tonic signaling of the B‐cell antigen‐specific receptor is a common functional hallmark in chronic lymphocytic leukemia cell phosphoproteomes at early disease stages

Molecular Oncology, EarlyView.
B‐cell chronic lymphocytic leukemia (B‐CLL) and monoclonal B‐cell lymphocytosis (MBL) show altered proteomes and phosphoproteomes, analyzed using mass spectrometry, protein microarrays, and western blotting. Identifying 2970 proteins and 316 phosphoproteins, including 55 novel phosphopeptides, we reveal BCR and NF‐kβ/STAT3 signaling in disease ...
Paula Díez, Pablo Juanes‐Velasco, Marina L. García‐Vaquero, Conrad Droste, Alicia Landeira‐Viñuela, Miguel Alcoceba, Helena Fidalgo‐Gómez, Sara Misiego‐Herrero, Almudena Navarro‐Bailón, Mónica Baile, José M. Bastida, Jose Manuel Sanchez‐Santos, Rafael Góngora, Julia Almeida, Marcos Gonzalez‐Diaz, Alberto Orfao, Javier De Las Rivas, Manuel Fuentes   +17 more
wiley   +1 more source

Cr Isotopic Abundances [PDF]

, 1985
We have developed techniques for the chemical separation and isotopic analysis of Cr in silicates and spinels. The purpose is to pursue the evidence for correlated isotopic effects in Ca-AI-rich inclusions (CAl) for elements in the vicinity of the Fe ...
Ngo, H. H., Papanastassiou, D. A., Wasserburg, G. J., Zyskind, J. L.   +3 more
core  

Cno Abundances Of Hydrogen-Deficient Carbon And R Coronae Borealis Stars: A View Of The Nucleosynthesis In A White Dwarf Merger [PDF]

, 2009
We present high-resolution (R similar to 50,000) observations of near-IR transitions of CO and CN of the five known hydrogen-deficient carbon (HdC) stars and four R Coronae Borealis (RCB) stars.
Eriksson, Kiell, Garcia-Hernandez, D. Anibal, Hinkle, Ken. H., Lambert, David L.   +3 more
core   +1 more source

Isotopic Abundances of Dwarf Stars

, 2020
GeoSnap is a new HgCdTe detector currently showing QE ~50% across 3-13?m. The device takes advantage of a ROIC currently operated at 85Hz full-frame readout across a 2048x1024 array, with larger sizes easily possible. This talk presents characterization of the first engineering-grade test device from Teledyne Imaging Systems, over the last year ...
Jessica Valverde, J. Lothringer, Becky Flores, David Coria, Elisabeth A. C. Mills, Ian Crossfield, Richard Freedman   +6 more
openaire   +2 more sources

Diffusion‐based size determination of solute particles: a method adapted for postsynaptic proteins

FEBS Open Bio, EarlyView.
We present a diffusion‐based approach for measuring the size of macromolecules and their complexes, and demonstrate its use on postsynaptic proteins. The method requires fluorescein‐labelled protein samples, a microfluidic device that maintains laminar flow for said samples, a microscope recording the emitted fluorescent signals, and an analytic ...
András László Szabó, Eszter Nagy‐Kanta, Soma Varga, Edit Andrea Jáger, Csaba István Pongor, Mária Laki, András József Laki, Zoltán Gáspári   +7 more
wiley   +1 more source

The First Spatially Resolved Detection of 13CN in a Protoplanetary Disk and Evidence for Complex Carbon Isotope Fractionation

The Astrophysical Journal
Recent measurements of carbon isotope ratios in both protoplanetary disks and exoplanet atmospheres have suggested a possible transfer of significant carbon isotope fractionation from disks to planets.
Tomohiro C. Yoshida, Hideko Nomura, Kenji Furuya, Richard Teague, Charles J. Law, Takashi Tsukagoshi, Seokho Lee, Christian Rab, Karin I. Öberg, Ryan A. Loomis   +9 more
doaj   +1 more source