Results 101 to 110 of about 14,840 (242)

Multi‐isotope (N, O, Ti, and Cr) study of C1 and CM‐like clasts—Probing unsampled C1 material

Meteoritics &Planetary Science, EarlyView.
Abstract A multi‐element isotope (N, O, Ti, and Cr) study was conducted on C1 and CM‐like clasts hosted in achondrites and chondrite breccias to understand the genesis of these chondritic clasts. The mineralogy, O, and N isotopes confirm that CM‐like clasts in howardites and polymict eucrites closely resemble CM chondrite‐like material.
Markus Patzek, Yogita Kadlag, Miriam Rüfenacht, Evelyn Füri, Andreas Pack, Addi Bischoff, Harry Becker, Robbin Visser, Timm John, Maria Schönbächler   +9 more
wiley   +1 more source

The radiative association of PO/PH+ and the photodissociation of PH+

Frontiers in Astronomy and Space Sciences
The potential energy curves (PECs) and transition dipole moments (TDMs) of PH+ and PO are computed with the multireference configuration interaction method, and the cross-sections for the radiative association (RA) of PH+ and PO, which is the most ...
Yang Chen, Xiaohe Lin, Lidan Xiao, Zijian Li, Songbin Zhang, Yongjun Cheng, Yong Wu, Bing Yan   +7 more
doaj   +1 more source

Rate Coefficient Measurements for the CH3SCH2OO Radical + NO Reaction Between 313 and 413 K

International Journal of Chemical Kinetics, Volume 57, Issue 6, Page 391-399, June 2025.
ABSTRACT The CH3SCH2OO radical is a key intermediate formed in the gas‐phase oxidation of dimethyl sulfide (CH3SCH3, DMS). In this study, the rate coefficient, k1(T), for the gas‐phase CH3SCH2OO + NO reaction was measured using a pulsed laser photolysis–iodide chemical ionization mass spectrometry (CIMS) detection competitive reaction method over the ...
Zachary Finewax, Emmanuel Assaf, Andrew W. Rollins, James B. Burkholder   +3 more
wiley   +1 more source

Sigma*-mediated electronic relaxation in 200nm photoexcited ammonia and heteroaromatics

EPJ Web of Conferences, 2013
Time–resolved photoelectron spectra of ammonia display combination bands of the umbrella and stretching modes associated with the N–H coordinate of σ* relaxation. Time–resolved photodissociation studies determine timescales
Evans N. L., Yu H., Ullrich S.
doaj   +1 more source

Analysis of carbohydrates and glycoconjugates by matrix‐assisted laser desorption/ionization mass spectrometry: An update for 2021–2022

Mass Spectrometry Reviews, Volume 44, Issue 3, Page 213-453, May/June 2025.
Abstract The use of matrix‐assisted laser desorption/ionization (MALDI) mass spectrometry for the analysis of carbohydrates and glycoconjugates is a well‐established technique and this review is the 12th update of the original article published in 1999 and brings coverage of the literature to the end of 2022.
David J. Harvey
wiley   +1 more source

Comparison of Interannual Oscillations in the F, E, and D‐Region Ionosphere Using Longterm Ground‐Based Measurements

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract This comprehensive study focuses on interannual oscillations from 1 to 25 years in the F, E, and D region ionosphere. By leveraging longterm (1960–2018) continuous ground‐based ionosonde and phase height measurements in northern Germany, we have identified the peak periods and temporal variations of these oscillations using advanced analysis ...
Mani Sivakandan, Dieter H. W. Peters, Jens Mielich, Toralf Renkwitz, Ralph Latteck, Jorge L. Chau   +5 more
wiley   +1 more source

Grain Dynamics in Photodissociation Regions [PDF]

arXiv, 1998
We discuss the forces on grains exposed to anisotropic radiation fields, including the usual ``radiation pressure'' force and also recoil forces due to photoemitted electrons, photodesorbed hydrogen atoms, and hydrogen molecules which form on the grain surface.
arxiv  

Advances in ozone technology for preservation of grains and end products: Application techniques, control of microbial contaminants, mitigation of mycotoxins, impact on quality, and regulatory approvals

Comprehensive Reviews in Food Science and Food Safety, Volume 24, Issue 3, May 2025.
Abstract Ozone has emerged as a promising technology for preserving stored grains and end products. Its efficiency as a biocide and the absence of residues make it an attractive alternative to traditional chemical methods of food preservation. This study reviews recent advancements in ozone application techniques, including continuous flow treatments ...
Eugénio da Piedade Edmundo Sitoe, Flaviana Coelho Pacheco, Florentina Domingos Chilala   +2 more
wiley   +1 more source

Theoretical Models of Photodissociation Fronts [PDF]

arXiv, 2000
Observations of H2 line emission have revealed higher-than-expected gas temperatures in a number of photodissociation fronts. We discuss the heating and cooling processes in photodissociation regions. Observations of NGC 2023 are compared to a theoretical model in which there is substantial gas at temperatures T = 500-1000K heated by photoelectric ...
arxiv  

Calculations on the rate of photodissociation of hexafluoroacetone [PDF]

, 1968
Peter G. Bowers
openalex   +1 more source