Results 111 to 120 of about 69,893 (289)

Evolutionary sequences of stellar models of intermediate and high mass including convective core overshooting

The Astrophysical Journal Supplement Series, 1991
Stellar evolution with parameterized overshooting from the convective core has been studied for the stellar mass range M/M(solar) = 3-30 and for the initial chemical composition range Xe = 0.650-0.739 (hydrogen) and Ze = 0.021-0.044 (metals). Evolutionary sequences run from the zero-age main sequence to the end of core helium burning, but emphasis is ...
Chao-Wen Chin, Richard B. Stothers
openaire   +1 more source

Checkpoint blockade and the stem‐like T cell trade‐off

Molecular Oncology, EarlyView.
Stem‐like T cells are key to the success of programmed cell death protein 1 (PD1) blockade, as they sustain long‐term anti‐tumor response by continuously generating effector CD8+ T cells. However, how these cells are maintained in cancer is not fully understood. Hor et al.
Julie M. Mazet, Johanna A. Joyce
wiley   +1 more source

Beyond MESA Defaults: The Impact of Structural Resolution Uncertainty in p-mode Asteroseismology

The Astrophysical Journal
Observations of pressure modes ( p -modes) in stars have enabled profound insights into stellar properties, and theoretical stellar evolution and oscillation models are integral to these inferences.
Yaguang Li, Meridith Joyce
doaj   +1 more source

Molecular cancer prevention: Intercepting disease

Molecular Oncology, EarlyView.
Oncological practice must evolve, from treating established tumours to proactive cancer interception before clinical manifestation. This will require mechanistic insight into tumour initiation, validated biomarkers of early disease development and redesigned clinical trials, enabling cancer interception to become a core pillar of oncology with the ...
Charlotte Grieco, Tej Pandya, Charles Swanton   +2 more
wiley   +1 more source

Chemically Self-consistent Modeling of the Globular Cluster NGC 2808 and its Effects on the Inferred Helium Abundance of Multiple Stellar Populations

The Astrophysical Journal
The helium abundances in the multiple populations that are now known to comprise all closely studied Milky Way globular clusters (GCs) are often inferred by fitting isochrones generated from stellar evolutionary models to GC photometry.
Emily M. Boudreaux, Brian C. Chaboyer, Amanda Ash, Renata Edaes Hoh, Gregory Feiden   +4 more
doaj   +1 more source

Atomic Diffusion and Mixing in Old Stars I. VLT/FLAMES-UVES Observations of Stars in NGC 6397

, 2007
We present a homogeneous photometric and spectroscopic analysis of 18 stars along the evolutionary sequence of the metal-poor globular cluster NGC 6397 ([Fe/H] = -2), from the main-sequence turnoff point to red giants below the bump.
A. J. Korn, Alonso A., Asplund M., Asplund M., B. Gustafsson, Barklem P. S., Charbonnel C., F. Grundahl, Fuhrmann K., Gonzalez J.-F., Gratton R. G., Gustafsson B., Kjaergaard P., L. Mashonkina, Mashonkina L., N. Piskunov, O. Richard, P. S. Barklem, Pasquini L., Pasquini L., R. Collet, Steenbock W.   +21 more
core   +3 more sources

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

The Effects of Stellar Wind, Rotation Velocity, and Overshoot Parameters on The Evolution of Massive Stars using MESA: Case Study of MPG 324, MPG 355, MPG 682

Spektra: Jurnal Fisika dan Aplikasinya
Massive stars (over 8 solar masses) undergo intricate cosmic journeys. Their evolution, shaped by parameters like stellar wind, rotation velocity, and overshoot, generally includes the pre-main sequence, main sequence, and post-main sequence phases.
Alin Hafizhah Adira, Aprilia
doaj   +1 more source

Thermohaline instability and rotation-induced mixing. I - Low- and intermediate-mass solar metallicity stars up to the end of the AGB

, 2010
(abridged) Numerous spectroscopic observations provide compelling evidence for non-canonical processes that modify the surface abundances of low- and intermediate-mass stars beyond the predictions of standard stellar theory.
Anders, Angulo, Balser, Balser, Balser, Bania, Bania, Boothroyd, Brown, Brun, C. Charbonnel, Cantiello, Caughlan, Chanamé, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Chiappini, Cunha, Dearborn, Dearborn, Decressin, Denissenkov, Eggenberger, Eggleton, Eggleton, Ferguson, Fusi Pecci, Gaigé, Geisler, Gilroy, Gilroy, Gratton, Grevesse, Hale, Hamdani, Harris, Harris, Herwig, Herwig, Hogan, Iben, Iglesias, Iliadis, Jacobson, Jacobson, Jacobson, Karakas, Kawaler, Kippenhahn, Koehler, Krishnamurti, Luck, Maeder, Meynet, Meynet, Michaud, Mikolaitis, Mowlavi, Mukhamedzhanov, N. Lagarde, Palacios, Palacios, Palla, Pasquini, Pilachowski, Recio-Blanco, Romano, Rood, Sackmann, Schaller, Sestito, Shetrone, Siess, Siess, Smiljanic, Smiljanic, Smith, Spite, Stancliffe, Stancliffe, Stern, Stothers, Sweigart, Talon, Talon, Tautvaišienė, Tautvaišienė, Thomas, Thomas, Théado, Tosi, Ulrich, Ulrich, Uttenthaler, Vassiliadis, Wasserburg, Weiss, Wiescher, Wolff, Yong, Zahn   +107 more
core   +2 more sources

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source