5 research outputs found
Curriculum and Teaching Styles: Evolution of Pedagogical Patterns
published or submitted for publicatio
Women's work : vision and change in librarianship : papers in honor of the centennial of the University of Illinois Graduate School of Library and Information Science
Includes bibliographical references
Our Community, Our Library: Women, Schools, and Popular Culture in the Public Library Movement
Isotope ratios of H, C, and O in CO2 and H2O of the Martian atmosphere
Stable isotope ratios of H, C, and O are powerful indicators of a wide variety of planetary geophysical processes, and for Mars they reveal the record of loss of its atmosphere and subsequent interactions with its surface such as carbonate formation. We report in situ measurements of the isotopic ratios of D/H and O-18/O-16 in water and C-13/C-12, O-18/O-16, O-17/O-16, and (CO)-C-13-O-18/(CO)-C-12-O-16 in carbon dioxide, made in the martian atmosphere at Gale Crater from the Curiosity rover using the Sample Analysis at Mars (SAM)'s tunable laser spectrometer (TLS). Comparison between our measurements in the modern atmosphere and those of martian meteorites such as ALH 84001 implies that the martian reservoirs of CO2 and H2O were largely established similar to 4 billion years ago, but that atmospheric loss or surface interaction may be still ongoing