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Focusing Effects on Laser-Induced Plasma Parameters: Applications to a Graphite Target Under Martian Atmospheric Conditions.
Appl Spectrosc
January 2025
Department of Physics & Applied Physics, Kennedy College of Sciences, University of Massachusetts Lowell, Lowell, Massachusetts, USA.
Under various atmospheric conditions, laser-induced breakdown spectroscopy (LIBS) is a powerful technique for elemental analysis, including in Earth- and Mars-like environments. However, understanding the plasma behavior and its dependence on ambient pressure and laser parameters remains a challenge. In this study, a numerical model based on a three-temperature Eulerian radiation framework under non-local thermodynamic equilibrium conditions is employed to investigate the interaction of a nanosecond laser pulse with a graphite target under helium (He) and carbon dioxide (CO atmospheres.
View Article and Find Full Text PDFPhylogenomics yields new systematic and taxonomical insights for Lissotriton newts, a genus with a strong legacy of introgressive hybridization.
Mol Phylogenet Evol
December 2024
Institute of Biology Leiden, Leiden University, P.O. Box 9505, 2300 RA Leiden, The Netherlands; Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands. Electronic address:
The ease with which genome-wide data can nowadays be collected allows complicated phylogenetic questions to be re-evaluated. Phylogenetic relationships among newts have often proven difficult to resolve due to the prevalence of incomplete lineage sorting and introgressive hybridization. For the newt genus Lissotriton, phylogenetic relationships are not settled and there is controversy surrounding the species status of several taxa.
View Article and Find Full Text PDFFrequency of Bovine Respiratory Disease Complex Bacterial and Viral Agents Using Multiplex Real-Time qPCR in Quebec, Canada, from 2019 to 2023.
Vet Sci
December 2024
Biovet Inc., Division of Antech Diagnostics and Mars Petcare Science & Diagnostics Company, Saint-Hyacinthe, QC J2S 8W2, Canada.
The bovine respiratory disease complex (BRD) is a multifactorial disease caused by various bacterial and viral pathogens. Using rapid pathogen detection techniques is helpful for tailoring therapeutic and preventive strategies in affected animals and herds. The objective of this study was to report the frequency of 10 pathogens by multiplex RT-qPCR on samples submitted for BRD diagnosis to a diagnostic laboratory (Biovet Inc.
View Article and Find Full Text PDFExtensive Secondary Cratering From the InSight Sol 1034a Impact Event.
J Geophys Res Planets
December 2024
Institut für Geophysik, ETH Zurich Zurich Switzerland.
Impact cratering is one of the fundamental processes throughout the history of the Solar System. The formation of new impact craters on planetary bodies has been observed with repeat images from orbiting satellites. However, the time gap between images is often large enough to preclude detailed analysis of smaller-scale features such as secondary impact craters, which are often removed or buried over a short time period.
View Article and Find Full Text PDFThe elusive nature of Martian liquid brines.
Proc Natl Acad Sci U S A
December 2024
The Lunar and Planetary Institute/Universities Space Research Association, Houston, TX 77058.
The possible presence of brines on Mars adds an intriguing dimension to the exploration of Martian environments. Their potential involvement in the formation of recurring slope lineae has sparked debates on the existence of liquid water versus alternative dry processes. In situ instrumentation on rovers and landers has been instrumental in providing valuable data for comprehending the dynamics of brines.
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