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Institution

University of New Mexico

EducationAlbuquerque, New Mexico, United States
About: University of New Mexico is a education organization based out in Albuquerque, New Mexico, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 28870 authors who have published 64767 publications receiving 2578371 citations. The organization is also known as: UNM & Universitatis Novus Mexico.


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Journal ArticleDOI
TL;DR: It is shown that isolated palladium atoms can be catalytically active on industrially relevant γ-alumina supports, and the addition of lanthanum oxide to the alumina, long known for its ability to improve alumina stability, is found to also help in the stabilization of isolated Palladium atoms.
Abstract: Catalysis by single isolated atoms of precious metals has attracted much recent interest, as it promises the ultimate in atom efficiency. Most previous reports are on reducible oxide supports. Here we show that isolated palladium atoms can be catalytically active on industrially relevant γ-alumina supports. The addition of lanthanum oxide to the alumina, long known for its ability to improve alumina stability, is found to also help in the stabilization of isolated palladium atoms. Aberration-corrected scanning transmission electron microscopy and operando X-ray absorption spectroscopy confirm the presence of intermingled palladium and lanthanum on the γ-alumina surface. Carbon monoxide oxidation reactivity measurements show onset of catalytic activity at 40 °C. The catalyst activity can be regenerated by oxidation at 700 °C in air. The high-temperature stability and regenerability of these ionic palladium species make this catalyst system of potential interest for low-temperature exhaust treatment catalysts.

487 citations

Journal ArticleDOI
TL;DR: This work examines several well-known ecogeographical rules, especially those pertaining to body size in contemporary, historical and fossil taxa, and reviews the evidence showing that rules of geographical variation in response to variation in the local environment can also apply to morphological changes through time in Response to climate change.
Abstract: Patterns of ecotypic variation constitute some of the few ‘rules’ known to modern biology. Here, we examine several well-known ecogeographical rules, especially those pertaining to body size in contemporary, historical and fossil taxa. We review the evidence showing that rules of geographical variation in response to variation in the local environment can also apply to morphological changes through time in response to climate change. These rules hold at various time scales, ranging from contemporary to geological time scales. Patterns of body size variation in response to climate change at the individual species level may also be detected at the community level. The patterns underlying ecotypic variation are complex and highly context-dependent, reducing the ‘predictive-power’ of ecogeographical rules. This is especially true when considering the increasing impact of human activities on the environment. Nonetheless, ecogeographical rules may help interpret the likely influences of anthropogenic climate change on ecosystems. Global climate change has already influenced the body size of several contemporary species, and will likely have an even greater impact on animal communities in the future. For this reason, we highlight and emphasise the importance of museum specimens and the continued need for documenting the earth's biological diversity.

486 citations

Journal ArticleDOI
S. S. Adler1, S. Afanasiev2, Christine Angela Aidala1, N. N. Ajitanand3  +337 moreInstitutions (40)
TL;DR: In this paper, the authors measured the transverse momentum spectra of neutral pions in the range 1 < p_T < 10 GeV/c and showed that the pi^0 multiplicity in central reactions is significantly below the yields measured at the same squarert(s_NN) in peripheral Au+Au and p+p reactions scaled by the number of nucleon-nucleon collisions.
Abstract: Transverse momentum spectra of neutral pions in the range 1 < p_T < 10 GeV/c have been measured at mid-rapidity by the PHENIX experiment at RHIC in Au+Au collisions at sqrt(s_NN) = 200 GeV. The pi^0 multiplicity in central reactions is significantly below the yields measured at the same sqrt(s_NN) in peripheral Au+Au and p+p reactions scaled by the number of nucleon-nucleon collisions. For the most central bin, the suppression factor is ~2.5 at p_T = 2 GeV/c and increases to ~4-5 at p_T ~= 4 GeV/c. At larger p_T, the suppression remains constant within errors. The deficit is already apparent in semi-peripheral reactions and increases smoothly with centrality.

485 citations

Journal ArticleDOI
TL;DR: The data indicate that grades 1 and 2 CVH do not increase an infant's risk for major handicaps, and there is a direct relationship of grades 3 and 4 CVH and major handicap.

483 citations

Journal ArticleDOI
Roger C. Wiens1, Sylvestre Maurice2, Sylvestre Maurice3, B. L. Barraclough1, B. L. Barraclough4, Muriel Saccoccio5, Walter Barkley1, James F. Bell6, S. Bender4, S. Bender1, John D. Bernardin1, Diana L. Blaney7, Jennifer G. Blank8, Marc Bouyé3, Marc Bouyé2, Nathan T. Bridges9, Nathan K. Bultman1, Phillippe Caïs10, Robert C. Clanton1, Benton C. Clark11, Samuel M. Clegg1, Agnès Cousin3, Agnès Cousin2, David A. Cremers, Alain Cros2, Alain Cros3, Lauren DeFlores7, Dorothea Delapp1, Robert Dingler1, Claude d’Uston2, Claude d’Uston3, M. Darby Dyar12, Tom Elliott7, Don Enemark1, Cécile Fabre, Mike Flores1, Olivier Forni3, Olivier Forni2, Olivier Gasnault3, Olivier Gasnault2, Thomas Chatters Hale1, Charles C. Hays6, K. E. Herkenhoff13, Ed Kan7, L. E. Kirkland14, Driss Kouach2, Driss Kouach3, David Landis15, Yves Langevin16, Nina Lanza1, Nina Lanza17, Frank LaRocca18, Jérémie Lasue1, Jérémie Lasue3, Jérémie Lasue2, Joseph Latino1, Daniel Limonadi7, Chris Lindensmith7, Cynthia K. Little1, Nicolas Mangold19, Gérard Manhès20, Patrick Mauchien21, Christopher P. McKay8, Edward A. Miller7, Joe Mooney, Richard V. Morris, Leland Jean Morrison1, T. Nelson1, Horton E. Newsom17, Ann Ollila17, Melanie N. Ott18, L. Parès2, L. Parès3, R. Perez5, Franck Poitrasson3, Franck Poitrasson2, Cheryl Provost, Joseph W. Reiter7, Tom Roberts7, Frank Patrick Romero1, V. Sautter, Steven Salazar1, John J. Simmonds7, Ralph Stiglich1, S. A. Storms1, Nicolas Striebig2, Nicolas Striebig3, Jean Jacques Thocaven2, Jean Jacques Thocaven3, Tanner Trujillo1, Mike Ulibarri1, David T. Vaniman4, David T. Vaniman1, Noah Warner7, Rob Waterbury, Robert Whitaker1, James Witt1, Belinda Wong-Swanson 
TL;DR: The first laser-induced breakdown spectrometer (LIBS) was used on the Mars Science Laboratory (MSL) rover Curiosity for remote compositional information using the first LIBS on a planetary mission, and provided sample texture and morphology data using a remote micro-imager.
Abstract: The ChemCam instrument suite on the Mars Science Laboratory (MSL) rover Curiosity provides remote compositional information using the first laser-induced breakdown spectrometer (LIBS) on a planetary mission, and provides sample texture and morphology data using a remote micro-imager (RMI). Overall, ChemCam supports MSL with five capabilities: remote classification of rock and soil characteristics; quantitative elemental compositions including light elements like hydrogen and some elements to which LIBS is uniquely sensitive (e.g., Li, Be, Rb, Sr, Ba); remote removal of surface dust and depth profiling through surface coatings; context imaging; and passive spectroscopy over the 240–905 nm range. ChemCam is built in two sections: The mast unit, consisting of a laser, telescope, RMI, and associated electronics, resides on the rover’s mast, and is described in a companion paper. ChemCam’s body unit, which is mounted in the body of the rover, comprises an optical demultiplexer, three spectrometers, detectors, their coolers, and associated electronics and data handling logic. Additional instrument components include a 6 m optical fiber which transfers the LIBS light from the telescope to the body unit, and a set of onboard calibration targets. ChemCam was integrated and tested at Los Alamos National Laboratory where it also underwent LIBS calibration with 69 geological standards prior to integration with the rover. Post-integration testing used coordinated mast and instrument commands, including LIBS line scans on rock targets during system-level thermal-vacuum tests. In this paper we describe the body unit, optical fiber, and calibration targets, and the assembly, testing, and verification of the instrument prior to launch.

482 citations


Authors

Showing all 29120 results

NameH-indexPapersCitations
Bruce S. McEwen2151163200638
David Miller2032573204840
Jing Wang1844046202769
Paul M. Thompson1832271146736
David A. Weitz1781038114182
David R. Williams1782034138789
John A. Rogers1771341127390
George F. Koob171935112521
John D. Minna169951106363
Carlos Bustamante161770106053
Lewis L. Lanier15955486677
Joseph Wang158128298799
John E. Morley154137797021
Fabian Walter14699983016
Michael F. Holick145767107937
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202390
2022595
20213,060
20203,048
20192,779
20182,729