Results 61 to 70 of about 596,259 (322)
Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer
FEBS Letters, EarlyView.Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani +4 more
wiley +1 more source
Metallicity structure in X-ray bright galaxy groups
, 2006 Using Chandra X-ray data of a sample of 15 X-ray bright galaxy groups, we present preliminary results of a coherent study of the radial distribution of metal abundances in the hot gas in groups.
A. Finoguenov +6 more
core +1 more source
Chemical enrichment in the early Galaxy [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractThe chemical enrichment by the first sources of light in the universe ultimately set the stage for the subsequent evolution of the Milky Way system. The oldest and, usually, the most-metal poor stars are our ‘near-field’ link to this ancient epoch as they, apart from tracing the chemical enrichment itself, also indirectly hold information on, e.
openaire +1 more source
The Populations of Carina. II. Chemical Enrichment* [PDF]
The Astrophysical Journal Supplement Series, 2017 Abstract Chemical abundances are presented for 19 elements in a sample of 63 red giants in the Carina dwarf spheroidal galaxy (dSph), based on homogeneous 1D/LTE model atmosphere analyses of our own observations (32 stars) and data available in the literature (a further 31 independent stars).
John E. Norris +5 more
openaire +3 more sources
Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing
FEBS Letters, EarlyView.Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley +1 more source
On the Use of the Multi-Site Langmuir Model for Predicting Methane Adsorption on Shale
EnergiesShale gas, mainly consisting of adsorbed gas and free gas, has served a critical role of supplying the growing global natural gas demand in the past decades. Considering that the adsorbed methane has contributed up to 80% of the total gas in place (GIP),
Zhe Wu +4 more
doaj +1 more source
He huaxue yu fangshe huaxue, 2023 LnPO4·nH2O rhabdophane is considered as one of potential material for precipitation-enrichment actinides in high-level radioactive waste liquid owing to its outstanding properties relating to the high chemical stability and the high selectivity and ...
ZHENG Xia-yu +4 more
doaj +1 more source
Chemical enrichment and accretion of nitrogen-loud quasars [PDF]
Astronomy & Astrophysics, 2017 We present rest-frame optical spectra of 12 “nitrogen-loud” quasars at z ~ 2.2, whose rest-frame ultraviolet (UV) spectra show strong nitrogen broad emission lines. To investigate their narrow-line region (NLR) metallicities, we measure the equivalent width (EW) of the [O iii]λ5007 emission line: if the NLR metallicity is remarkably high, as suggested ...
Matsuoka, K. +5 more
openaire +3 more sources
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 +3 more
wiley +1 more source
Element Nucleosynthetic Origins from Abundance Spatial Distributions beyond the Milky Way
The Astrophysical Journal LettersAn element’s astrophysical origin should be reflected in the spatial distribution of its abundance, yielding measurably different spatial distributions for elements with different nucleosynthetic sites.
Zefeng Li +9 more
doaj +1 more source