energy dispersive X-ray spectroscopy Archives

a) Large area EDS map of Nantan meteorite sample showing the distribution of detected elements. b) XPS SnapMaps of Nantan fragment showing the distribution of Fe and Ni. c) XRF maps of individual elements detected, with a focus on Fe and Ni. -- astro-ph.EP

Astrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Meteorites & Asteroids, Sample Return, Status Report

Correlative Microstructural Analysis of a Weathered Nantan Meteorite Fragment

by Keith CowingApril 19, 2026April 19, 2026

The weathering of iron-rich phases within meteorites is a multi-stage process that significantly alters the microstructure and chemical composition based both on the environmental condition at the location of landing […]

Whole-cell cryo-electron tomogram of Nitrosopumilus maritimus SCM1. (A–C) Cryo-EM images of SCM1 at − 60°, 0°, and + 60° angles. (D) Tomographic slice (13.6 Å in thickness) showed the cellular structure of SCM1. (E) 3D segmentation of SCM1 cell. MDR, medium-density region; HDR, high-density region; CM, cytoplasmic membrane; SL, surface layer; Nuc, nucleoid; Rib, ribosome; PS, pseudoperiplasmic space; and Cyt, cytoplasm, are displayed. -- Frontiers in Microbiology

Biochemistry & Organic Chemistry, Biophysics, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Status Report

Ultrastructural Insights Into Cellular Organization, Energy Storage And Ribosomal Dynamics Of An Ammonia-oxidizing Archaeon From Oligotrophic Oceans

by Keith CowingApril 27, 2024April 27, 2024

Introduction: Nitrososphaeria, formerly known as Thaumarchaeota, constitute a diverse and widespread group of ammonia-oxidizing archaea (AOA) inhabiting ubiquitously in marine and terrestrial environments, playing a pivotal role in global nitrogen […]