Results 31 to 40 of about 461,051 (310)
Journal of High Energy Astrophysics, 2018 We argue that if ultrahigh-energy (E > 10^10 GeV) cosmic rays are heavy nuclei (as indicated by existing data), then the pointing of cosmic rays to their nearest extragalactic sources is expected for 10^10.6 < E/GeV < 10^11. This is because for a nucleus of charge Ze and baryon number A, the bending of the cosmic ray decreases as Z/E with ...
Anchordoqui, Luis A. +2 more
openaire +2 more sources
Quantitative determination of carbonaceous particle mixing state in Paris using single-particle mass spectrometer and aerosol mass spectrometer measurements [PDF]
Atmospheric Chemistry and Physics, 2013 Single-particle mixing state information can be a powerful tool for assessing the relative impact of local and regional sources of ambient particulate matter in urban environments.
R. M. Healy +14 more
doaj +1 more source
Exploring ECD on a benchtop Q Exactive Orbitrap Mass Spectrometer [PDF]
, 2017 As the application of mass spectrometry intensifies in scope and diversity, the need for advanced instrumentation addressing a wide variety of analytical needs also increases.
Lopez, Nathan I +18 more
core +1 more source
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2023 The article considers analytical models of high-frequency electric fields which can be used effectively for fast, high-quality simulation of ion flow focusing and transport processes in the radio-frequency funnels.
Sysoev Alexey +4 more
doaj +1 more source
Algorithms for the analysis of MALDI peptide mass fingerprint spectra for proteomics [PDF]
, 2005 In this study we present a simple algorithm which allows accurate estimates of the similarity between peptide fingerprint mass spectra from matrix assisted laser desorption/ionization (MALDI) spectrometers.
Monigatti, Flavio
core +1 more source
A field-deployable, chemical ionization time-of-flight mass spectrometer [PDF]
Atmospheric Measurement Techniques, 2011 We constructed a new chemical ionization time-of-flight mass spectrometer (CI-TOFMS) that measures atmospheric trace gases in real time with high sensitivity.
T. H. Bertram +8 more
doaj +1 more source
Expanding the structural analysis capabilities on an Orbitrap-based mass spectrometer for large macromolecular complexes [PDF]
, 2018 Native mass spectrometry can provide insight into the structure of macromolecular biological systems. As analytes under investigation get larger and more complex, instrument capabilities need to be advanced.
Heck, Albert J R +12 more
core +1 more source
Studies of Aerosol Composition and Hygroscopicity [PDF]
, 2011 Atmospheric aerosols have significant impacts on human health, regional visibility, and the radiative energy balance of Earth, but there remain many uncertainties about their sources and evolution in the atmosphere, as well as the details and magnitude ...
Hersey, Scott Patrick
core +1 more source
MEMS Membranes with Nanoscale Holes for Analytical Applications
Membranes, 2021 Micro-electro-mechanical membranes having nanoscale holes were developed, to be used as a nanofluidic sample inlet in novel analytical applications.
Alvise Bagolini +4 more
doaj +1 more source
A new Time-Of-Flight Mass Spectrometer (TOF-MS) for noble gas analysis [PDF]
, 2015 Noble gas analysis in early solar system materials, which can provide valuable information about early solar system processes and timescales, are very challenging because of extremely low noble gas concentrations (ppt).
Ramisetty, Ramakrishna
core +1 more source