Results 61 to 70 of about 45,338 (207)

Impact of Multiple S‐Palmitoylation on Peptide Ionization and Fragmentation in Mass Spectrometry

Chemistry–Methods, EarlyView.
S‐palmitoylation is selectively introduced at potential modification sites of a model peptide. Modified peptides are then characterized by mass spectrometry, and the sites of modification are unambiguously identified. Lipidation, such as S‐palmitoylation, is an important, reversible post‐translational modification of proteins determining not only their
Elisa Badin, Carla Schmidt
wiley   +1 more source

The Photodissociation and Ionization Fronts in M17-SW Localized with FIFI-LS on Board SOFIA

The Astrophysical Journal, 2023
To understand star formation rates, studying feedback mechanisms that regulate star formation is necessary. The radiation emitted by nascent massive stars play a significant role in feedback by photodissociating and ionizing their parental molecular ...
Randolf Klein, Alexander Reedy, Christian Fischer, Leslie W. Looney, Sebastian Colditz, Dario Fadda, Alexander G. G. M. Tielens, Willam D. Vacca   +7 more
doaj   +1 more source

Coupled Chemistry-Emission Model for Atomic Oxygen Green and Red-doublet Emissions in Comet C/1996 B2 Hyakutake

, 2012
The green (5577 \AA) and red-doublet (6300, 6364 \AA) lines are prompt emissions of metastable oxygen atoms in the $^1$S and $^1$D states, respectively, that have been observed in several comets.
Anil Bhardwaj, Biver, Combi, Combi, Demore, Feldman, Festou, Festou, Glinski, Huebner, Huestis, Kedzierski, LeClair, Link, Morgenthaler, Morgenthaler, Raghuram, Seng, Susarla Raghuram, Wiese   +19 more
core   +1 more source

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

Proton‐Coupled Electron Transfer in Cytochrome c Oxidase: Heme a Controls the Protonation Dynamics of E286

ChemPhysChem, EarlyView.
Deprotonation of the glutamic acid 286 in cytochrome c oxidase from Cereibacter sphaeroides occurs 13 μs after photolysis of the CO ligand. The reaction is triggered by subsequent backward electron transfer from the heme a3 to heme a, which immediately precedes the deprotonation event.
Federico Baserga, Pit Langner, Luiz Schubert, Julian P. Storm, Ramona Schlesinger, Joachim Heberle   +5 more
wiley   +1 more source

Mid‐infrared Spectroscopy of Protonated Benzonitrile, 2‐Cyanonaphthalene, and 9‐Cyanoanthracene for Astrochemical Consideration

ChemPhysChem, EarlyView.
Experimental infrared absorption spectra of three protonated cyano‐substituted PAHs measured by infrared multiple photon dissociation using the free‐electron laser Free‐Electron Laser for Infrared eXperiments are studied. These spectra are compared to an emission spectrum measured by JWST, and the largest measured protonated cyano‐PAH, cyanoanthracene,
Anne P. Rasmussen, Corentin Rossi, Bérenger Gans, Laura Finazzi, Jos Oomens, Giel Berden, Ugo Jacovella   +6 more
wiley   +1 more source

X-ray induced Coulomb explosion imaging of transient excited-state structural rearrangements in CS2

Communications Physics, 2023
Structural imaging of transient excited-state species is a key goal of molecular physics, promising to unveil rich information about the dynamics underpinning photochemical transformations.
James Unwin, Felix Allum, Mathew Britton, Ian Gabalski, Hubertus Bromberger, Mark Brouard, Philip H. Bucksbaum, Taran Driver, Nagitha Ekanayake, Diksha Garg, Eva Gougoula, David Heathcote, Andrew J. Howard, Paul Hockett, David M. P. Holland, Sonu Kumar, Chow-shing Lam, Jason W. L. Lee, Joseph McManus, Jochen Mikosch, Dennis Milesevic, Russell S. Minns, Christina C. Papadopoulou, Christopher Passow, Weronika O. Razmus, Anja Röder, Arnaud Rouzée, Michael Schuurman, Alcides Simao, Albert Stolow, Atia Tul-Noor, Claire Vallance, Tiffany Walmsley, Daniel Rolles, Benjamin Erk, Michael Burt, Ruaridh Forbes   +36 more
doaj   +1 more source

Indistinguishability and Interference in the Coherent Control of Atomic and Molecular Processes

, 2010
The subtle and fundamental issue of indistinguishability and interference between independent pathways to the same target state is examined in the context of coherent control of atomic and molecular processes, with emphasis placed on possible "which-way"
Feynman R. P., Greenstein G., Jiangbin Gong, Loudon R., Nielsen M. A., Paul Brumer, Rice S. A., Schlosshauer M., Tannor D.   +8 more
core   +1 more source

Recent Advancements in the Characterization of D‐Amino Acid and Isoaspartate Post‐Translational Modifications

Mass Spectrometry Reviews, EarlyView.
ABSTRACT One of the great triumphs of mass spectrometry‐based peptide and protein characterization is the characterization of their modifications as most modifications have a characteristic mass shift. What happens when the modification does not change the mass of the peptide?
Samuel Okyem, Jonathan V. Sweedler
wiley   +1 more source

Advancements in Mass Spectrometry‐Based Glycomics in Food and Nutritional Science

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review highlights advancements in mass spectrometry (MS)‐based glycomics in food and nutritional science. Carbohydrates, which are vital for human health, exhibit complex structures, making their analysis challenging. MS has become an indispensable tool for elucidating the structures of carbohydrates, including glycans, through soft ...
JaeHui Song, HyunJi Lee, Youngshik Choe, Hyeyoung Lee   +3 more
wiley   +1 more source