Results 61 to 70 of about 17,937 (217)

Skeletochronology and isotopic analysis of a captive individual of Alligator mississippiensis Daudin, 1802 [PDF]

Fossil Record, 2009
In the present study, bone histology and isotope composition (C, N, O) of a femur and three postcranial osteoderms from an approximately 23–25 year-old captive female Alligator mississippiensis Daudin, 1802 were analyzed to infer the recorded life ...
N. Klein, T. Scheyer, T. Tütken
doaj   +3 more sources

Preliminary site report for the 2005 ICDP-USGS deep corehole in the Chesapeake Bay impact crater [PDF]

, 2006
First report for the ICDP-USGS 1.7-km-deep corehole drilled into the central part of the Chesapeake Bay impact crater during ...
Browning, J. V., Cockell, C. S., Dypvik, H., Edwards, L. E., Gohn, G. S., Horton Jr., J. W., Koeberl, C., McLaughlin, P. P., Miller, K. G., Ormö, J., Plescia, J. B., Powars, D. S., Reimold, W. U., Sanford, W. E., Self-Trail, J. M., Voytek, M. A.   +15 more
core  

Reply to Comment on "Cosmic rays, carbon dioxide, and climate" [PDF]

, 2004
In our analysis [Rahmstorf et al., 2004], we arrived at two main conclusions: the data of Shaviv and Veizer [2003] do not show a significant correlation of cosmic ray flux (CRF) and climate, and the authors' estimate of climate sensitivity to CO2 based ...
Archer, D., Ebel, D. S., Eugster, O., Jouzel, J., Maraun, Douglas, Neu, U., Rahmstorf, Stefan, Schmidt, G. A., Severinghaus, J., Weaver, A. J., Zachos, J.   +10 more
core   +1 more source

Ferromagnesian Clay Diversity Across Mars' Crustal Dichotomy: A Window Into Early Aqueous Environments

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Extensive research over the past two decades has shown that early Mars likely had a warmer, wetter climate with widespread water activity. Ferromagnesian (Fe,Mg‐rich) clay deposits are compelling markers of these ancient environments, helping reconstruct Mars' hydrologic evolution, assess past habitability, and guide future exploration.
Jeremy Brossier, Francesca Altieri, Maria Cristina De Sanctis, Alessandro Frigeri, Marco Ferrari, Simone De Angelis, Enrico Bruschini, Monica Rasmussen, Janko Trisic Ponce   +8 more
wiley   +1 more source

Synthesis of novel derivatives of 5-hydroxymethylcytosine and 5-formylcytosine as tools for epigenetics

Beilstein Journal of Organic Chemistry, 2014
In this work we present for the first time the synthesis of novel 5-hydroxymethylcytosine (5hmC) and 5-formylcytosine (5fC) derivatives that can be used as tools in the emerging field of epigenetics for deciphering chemical biology of TET-mediated ...
Anna Chentsova, Era Kapourani, Athanassios Giannis   +2 more
doaj   +1 more source

Een Germaanse gemeenschap op het spoor : een petrografische studie van Germaans aardewerk uit Bachte-Maria-Leerne (prov. Oost-Vlaanderen) [PDF]

, 2020
A
De Clercq, Wim, De Logi, Adelheid, Van Nuffel, Jana, Van Thienen, Vince   +3 more
core   +1 more source

A vibrational spectroscopic study of plancheite Cu 8Si 8O 22(OH) 4-H2O [PDF]

, 2012
Planchéite Cu8Si8O22(OH)4•H2O is a hydrated copper hydroxy silicate. The objective of this work is to use Raman and infrared spectroscopy to determine the molecular structure of planchéite.
Frost, Ray, Xi, Yunfei
core   +2 more sources

A Fluvio‐Lacustrine Environment Preserved in the Jezero Crater Inlet Channel, Neretva Vallis, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Martian fluvial valleys provide evidence for the surface flow of liquid water, making them a key target for rover‐based investigations of ancient habitability. The Mars 2020 Perseverance rover spent ∼85 sols exploring the Bright Angel formation, exposed across the floor of Neretva Vallis: the western inlet channel of Jezero crater.
Alexander J. Jones, Robert Barnes, Sanjeev Gupta, Gerhard Paar, Joel Hurowitz, Brittan V. Wogsland, Adrian Broz, Hemani Kalucha, Athanasios Klidaras, Kathryn M. Stack, Patrick Russell, Briony Horgan, Bradley Garczynski, Melissa Rice, James F. Bell III, Jusin N. Maki, Svein‐Erik Hamran, Alicia Vaughan, Justin I. Simon, Oak Kanine, Stephanie A. Connell, Henry Manelski, Ashley Murphy, Olivier Beyssac, Nicolas Mangold, Olivier Gasnault, Christoph Traxler, Adrian Brown, David Flannery, Nicolas Randazzo, Jesús Martínez‐Frías, Kenneth A. Farley   +31 more
wiley   +1 more source

Effect of grain shape on the agglomeration of polycrystalline thin films

, 2006
Grain-boundary grooving is a general phenomenon occurring in all polycrystalline materials at the intersection between the grain-boundary and the interface or free surface. It has been studied theoretically for some time.
Mathieu Bouville, Wulff G.
core   +1 more source

Electronic friction and liquid-flow-induced voltage in nanotubes [PDF]

, 2004
A recent exciting experiment by Ghosh et al. reported that the flow of an ion-containing liquid such as water through bundles of single-walled carbon nanotubes induces a voltage in the nanotubes that grows logarithmically with the flow velocity v0.
Persson, B. N. J., Tartaglino, U., Tosatti, E., Ueba, H.   +3 more
core   +3 more sources