Results 91 to 100 of about 2,666,833 (318)

Fundamental parameters line profile fitting in laboratory diffractometers

Journal of Research of the National Institute of Standards and Technology, 2004
The fundamental parameters approach to line profile fitting uses physically based models to generate the line profile shapes. Fundamental parameters profile fitting (FPPF) has been used to synthesize and fit data from both parallel beam and divergent beam diffractometers. The refined parameters are determined by the diffractometer configuration.
Cheary, R. W., Coelho, A. A., Cline, J. P.   +2 more
openaire   +2 more sources

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, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

Overlapping Open Clusters NGC 1750 and NGC 1758 behind the Taurus Dark Clouds. II. CCD Photometry in the Vilnius System

Open Astronomy, 2003
Seven-color photometry in the Vilnius system has been obtained for 420 stars down to V = 16 mag in the area containing the overlapping open clusters NGC 1750 and NGC 1758 in Taurus.
Straižys V., Kazlauskas A., Černiauskas A., Boyle R. P., Vrba F. J., Philip A. G. Davis, Laugalys V., Černis K., Smriglio F.   +8 more
doaj   +1 more source

Fundamental parameters and infrared excesses of Hipparcos stars

, 2012
We derive the fundamental parameters (temperature and luminosity) of 107 619 Hipparcos stars and place these stars on a true Hertzsprung-Russell diagram.
A. A. Zijlstra, Aihara, Allard, Beichmann, Bergeat, Bertelli, Boyer, Boyer, Chen, Cho, Dotter, Egan, ESA, Evans, Gezari, Gray, Gray, Groenewegen, Gustafsson, Gustafsson, Höfner, I. McDonald, Ita, Ita, Ita, Kastner, Knapp, Kraemer, Kwan, Kwok, Ladjal, Libert, Luck, Lutz, M. L. Boyer, Marigo, McDonald, McDonald, McDonald, McDonald, McDonald, McDonald, McDonald, Meyer, Miville-Deschênes, Momany, Norris, Oudmaijer, Perryman, Price, Price, Samus, Skrutskie, Sloan, Sloan, Sloan, Sloan, Tatebe, Ueta, Ueta, Valdes, Van Eck, van Leeuwen, Wallace, Wallace, Wareing, Woods, Wright, Wu   +68 more
core   +1 more source

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 first-principles determination of the Standard Model fundamental\n parameters in the quark sector [PDF]

, 2014
B. Blossier
openalex   +2 more sources

Symbiotic Stars: Observations Confront Theory

Open Astronomy, 2012
In this paper, I present and discuss some recent observational results which may have important implications for our understanding of late phases of binary evolution.
Mikołajewska J.
doaj   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Accurate Fundamental Parameters or A, F, and G-type Supergiants in the Solar Neighbourhood

, 2009
The following parameters are determined for 63 Galactic supergiants in the solar neighbourhood: effective temperature Teff, surface gravity log g, iron abundance log e(Fe), microturbulent parameter Vt, mass M/Msun, age t and distance d.
Andrievsky, Arellano Ferro, Blackwell, Boyarchuk, Boyarchuk, Castelli, Castelli, Claret, Daflon, David L. Lambert, Dmitry B. Poklad, Evans, Fuhrmann, Gonzalez, Grevesse, Gustafsson, Hauck, Heiter, Klochkova, Kovtyukh, Kovtyukh, Kupka, Kurucz, Leonid S. Lyubimkov, Luck, Luck, Luck, Lyubimkov, Lyubimkov, Lyubimkov, Lyubimkov, Lyubimkov, Lyubimkov, Lyubimkov, Lyubimkov, Meléndez, Parsons, Ramírez, Schiller, Sergey I. Rostopchin, Spitoni, Tamara M. Rachkovskaya, Thévenin, Tull, van Belle, van Leeuwen, Venn, Venn, Önehag   +48 more
core   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source