Results 101 to 110 of about 4,382,200 (272)

CHAOS I. DIRECT CHEMICAL ABUNDANCES FOR H II ?> REGIONS IN NGC 628 [PDF]

, 2015
The CHemical Abundances of Spirals (CHAOS) project leverages the combined power of the Large Binocular Telescope (LBT) with the broad spectral range and sensitivity of the Multi Object Double Spectrograph (MODS) to measure “direct” abundances (based on ...
D. Berg, E. Skillman, K. Croxall, R. Pogge, J. Moustakas, Mara Johnson-Groh   +5 more
semanticscholar   +1 more source

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

FEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

Nucleosynthesis of Cobalt and Copper

Galaxies
Chemical abundances of cobalt (Co; Z = 27) and copper (Cu; Z = 29) in bulge and halo stars are presented and compared with chemical evolution models.
Beatriz Barbuy, Amâncio C. S. Friaça, Heitor Ernandes   +2 more
doaj   +1 more source

Excitation and abundance study of CO+ in the interstellar medium

, 2009
Observations of CO+ suggest column densities on the order 10^12 cm^-2 that can not be reproduced by many chemical models. CO+ is more likely to be destroyed than excited in collisions with hydrogen.
Andersson, Black, Cheng, Dickinson, Dubernet, Faure, Ferland, Flower, Fuente, Fuente, Fuente, Fuente, Hogerheijde, Jansen, Latter, Meixner, P. Stäuber, Park, Pellegrini, Pickett, Rizzo, Röllig, S. Bruderer, Savage, Schöier, Spaans, Sternberg, Stoerzer, Stäuber, Stäuber, Stäuber, Stäuber, Troe, van der Tak, Woodall   +34 more
core   +2 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

About the chemical composition of delta Scuti - the prototype of the class of pulsating variables

, 2004
We present chemical abundances in the photosphere of $\delta$ Scuti -- the prototype of the class of pulsating variables -- determined from the analysis of a spectrum obtained at Terskol observatory 2 meter telescope with resolution $R=52,000$, signal to
Gopka, V., Kang, F., Kim, C., Musaev, F., Yushchenko, A.   +4 more
core   +1 more source

The challenge of simultaneously matching the observed diversity of chemical abundance patterns in cosmological hydrodynamical simulations [PDF]

, 2021
Tobias Buck, J. Rybizki, Sven Buder, Aura Obreja, Andrea V. Macciò, Christoph Pfrommer, Matthias Steinmetz, Melissa Ness   +7 more
openalex   +1 more source

CHEMICAL ABUNDANCES AND PROPERTIES OF THE IONIZED GAS IN NGC 1705 [PDF]

, 2015
We obtained [O iii] narrow-band imaging and multi-slit MXU spectroscopy of the blue compact dwarf (BCD) galaxy NGC 1705 with FORS2@VLT to derive chemical abundances of planetary nebulae and H ii regions and, more in general, to characterize the ...
F. Annibali, M. Tosi, A. Pasquali, A. Aloisi, M. Mignoli, D. Romano   +5 more
semanticscholar   +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

Origin of cosmic chemical abundances [PDF]

, 2015
Cosmological N-body hydrodynamic computations following atomic and molecular chemistry (e$^-$, H, H$^+$, H$^-$, He, He$^+$, He$^{++}$, D, D$^+$, H$_2$, H$_2^+$, HD, HeH$^+$), gas cooling, star formation and production of heavy elements (C, N, O, Ne, Mg ...
U. Maio, E. Tescari
semanticscholar   +1 more source