Results 31 to 40 of about 60,044 (291)

natural isotopic abundance [PDF]

, 2014
Citation: 'natural isotopic abundance' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.N04089 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Isotopic Compositions and Elemental Abundances of Chromium in Presolar Silicon Carbide Grains from Asymptotic Giant Branch Stars

The Astrophysical Journal
Isotopes of chromium (Cr) and other iron-group elements are predominantly made in the inner shells of supernovae and are later reprocessed via the slow neutron capture process ( s -process) in asymptotic giant branch (AGB) stars.
Kuljeet K. Marhas, Manish N. Sanghani, Scott R. Messenger, Antariksha Mitra, Ritesh K. Mishra   +4 more
doaj   +1 more source

Estimates of woody biomass and mixed effects improve isoscape predictions across a northern mixed forest

Frontiers in Ecology and Evolution, 2023
Contemporary methods used to predict isotopic variation at regional scales have yet to include underlying distributions of the abundance of isotopic substrates.
John L. Berini, John L. Berini, Bryan Runck, Jody Vogeler, David L. Fox, James D. Forester, James D. Forester   +6 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

The Coronal Isotopic Composition as Determined Using Solar Energetic Particles [PDF]

, 2003
Solar energetic particles (SEPs), like the solar wind, provide a direct sample of the Sun. Although SEP abundances show a variable amount of mass fractionation, it is possible to develop methods of correcting for it in order to deduce the composition of ...
Christian, E. R., Cohen, C. M. S., Cummings, A. C., Leske, R. A., Mewaldt, R. A., Slocum, P. L., Stone, E. C., von Rosenvinge, T. T., Wiedenbeck, M. E.   +8 more
core  

Constraints on cosmic-ray acceleration and transport from isotope observations [PDF]

, 2000
Observations from the Cosmic Ray Isotope Spectrometer (CRIS) on ACE have been used to derive constraints on the locations, physical conditions, and time scales for cosmic-ray acceleration and transport.
Binns, W. R., Christian, E. R., Cummings, A. C., George, J. S., Hink, P. L., Klarmann, J., Leske, R. A., Lijowski, M., Mewaldt, R. A., Stone, E. C., von Rosenvinge, T. T., Wiedenbeck, M. E., Yanasak, N. E.   +12 more
core   +1 more source

Cell‐cycle‐specific lesion evolution rather than inhibition of double‐strand‐break repair underpins cisplatin radiosensitization

Molecular Oncology, EarlyView.
We analyze cisplatin–DNA adducts (CDAs) and double‐strand breaks (DSBs) in a cell‐cycle‐dependent manner. We find that CDAs form similarly across all cell cycle phases. DSBs arise only in S‐phase. CDAs might not directly impair DSB repair, but S‐phase DSB lesions evolve in the presence of CDAs and disrupt repair in G2, also causing radiosensitization ...
Ye Qiu, Xixi Lin, Emil Mladenov, Veronika Mladenova, Jürgen Thomale, Ali Sak, Yao Wang, Yunxuan Deng, Eleni Gkika, Martin Stuschke, George Iliakis   +10 more
wiley   +1 more source

The Isotopic Abundances of Galactic Cosmic Rays with Atomic Number 29 ≤ Z ≤ 38

The Astrophysical Journal, 2022
The Cosmic Ray Isotope Spectrometer (CRIS) on the Advanced Composition Explorer spacecraft has been operating successfully in a halo orbit about the L1 Lagrange point since late 1997.
W. R. Binns, M. E. Wiedenbeck, T. T. von Rosenvinge, M. H. Israel, E. R. Christian, A. C. Cummings, G. A. de Nolfo, R. A. Leske, R. A. Mewaldt, E. C. Stone   +9 more
doaj   +1 more source

Meta‐analysis fails to show any correlation between protein abundance and ubiquitination changes

FEBS Open Bio, EarlyView.
We analyzed over 50 published proteomics datasets to explore the relationship between protein levels and ubiquitination changes across multiple experimental conditions and biological systems. Although ubiquitination is often associated with protein degradation, our analysis shows that changes in ubiquitination do not globally correlate with changes in ...
Nerea Osinalde, Unai Alduntzin, Gorka Prieto, Ugo Mayor   +3 more
wiley   +1 more source

A standardized quantitative analysis strategy for stable isotope probing metagenomics

mSystems, 2023
Stable isotope probing (SIP) facilitates culture-independent identification of active microbial populations within complex ecosystems through isotopic enrichment of nucleic acids.
Dariia Vyshenska, Pranav Sampara, Kanwar Singh, Andy Tomatsu, W. Berkeley Kauffman, Erin E. Nuccio, Steven J. Blazewicz, Jennifer Pett-Ridge, Katherine B. Louie, Neha Varghese, Matthew Kellom, Alicia Clum, Robert Riley, Simon Roux, Emiley A. Eloe-Fadrosh, Ryan M. Ziels, Rex R. Malmstrom   +16 more
doaj   +1 more source