Results 101 to 110 of about 440,001 (300)

Kepler main-sequence solar-like stars: surface rotation and magnetic-activity evolution

Frontiers in Astronomy and Space Sciences
While the mission’s primary goal was focused on exoplanet detection and characterization, Kepler made and continues to make extraordinary advances in stellar physics. Stellar rotation and magnetic activity are no exceptions.
Ângela R. G. Santos, Diego Godoy-Rivera, Diego Godoy-Rivera, Adam J. Finley, Savita Mathur, Savita Mathur, Rafael A. García, Sylvain N. Breton, Anne-Marie Broomhall   +8 more
doaj   +1 more source

Testing the companion hypothesis for the origin of the X-ray emission from intermediate-mass main-sequence stars

, 2006
There is no straightforward explanation for intrinsic X-ray emission from intermediate-mass main-sequence stars. Therefore the observed emission is often interpreted in terms of (hypothesized) late-type magnetically active companion stars. We use Chandra
Abt, Andersen, B. Stelzer, Babel, Babel, Baraffe, Berghöfer, Berghöfer, Bychkov, Caillault, Cash, Catanzaro, Close, Daniel, de Geus, de Zeeuw, Dodd, Duquennoy, Eggen, Feigelson, Freeman, Frost, G. Micela, Gahm, Gehrels, Gerbaldi, Getman, Hogg, Hubrig, Huélamo, Huélamo, Hünsch, Isobe, Kenyon, Kouwenhoven, Kraft, Landstreet, Lindroos, Lindroos, Lindroos, Lucy, N. Huélamo, Owocki, Palla, Pallavicini, Parker, Parker, Patten, Preibisch, Preibisch, Raymond, Renson, Royer, Ryter, Rüdiger, S. Hubrig, Schmitt, Schmitt, Schmitt, Schneider, Shatsky, Smith, Stelzer, Stelzer, Stelzer, Stelzer, Wilms, Wolk, Yushchenko   +68 more
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

3D NLTE spectral line formation of lithium in late-type stars. [PDF]

Mon Not R Astron Soc, 2021
Wang EX, Nordlander T, Asplund M, Amarsi AM, Lind K, Zhou Y.   +5 more
europepmc   +1 more source

Infrared Observations of Late Type Stars [PDF]

International Astronomical Union Colloquium, 1977
AbstractSubstantative mass-loss resulting in appreciable circumstellar dust envelopes is common in late-type stars. The evolutionary history and physical state of a cool star determine the chemistry within the outer stellar atmosphere mirrored by the molecular and particulate material present in the envelope.
openaire   +1 more source

PICALM::MLLT10 translocated leukemia

FEBS Letters, EarlyView.
This comprehensive review of PICALM::MLLT10 translocated acute leukemia provides an in‐depth review of the structure and function of CALM, AF10, and the fusion oncoprotein (1). The multifaceted molecular mechanisms of oncogenesis, including nucleocytoplasmic shuttling (2), epigenetic modifications (3), and disruption of endocytosis (4), are then ...
John M. Cullen, Antonia C. Nakatsugawa, Natalie Barton, Henry Haines, Gary S. Stein, Janet L. Stein, Daniel S. Wechsler, Jessica L. Heath   +7 more
wiley   +1 more source

Additional late-type stars with technetium

The Astronomical Journal, 1987
The results of a survey of 279 late-type giants and supergiants for the spectral lines of the radioactive element technetium (Tc I) at 4297, 4262, and 4238 A are presented. The following conclusions are reached: (1) the presence of Tc correlates very strongly with the existence of light variability; (2) evolutionary MS stars show Tc and spectroscopic ...
Stephen J. Little, Irene R. Little-Marenin, Wendy Hagen Bauer   +2 more
openaire   +1 more source

Inhibiting stearoyl‐CoA desaturase suppresses bone metastatic prostate cancer by modulating cellular stress, mTOR signaling, and DNA damage response

FEBS Letters, EarlyView.
Bone metastasis in prostate cancer (PCa) patients is a clinical hurdle due to the poor understanding of the supportive bone microenvironment. Here, we identify stearoyl‐CoA desaturase (SCD) as a tumor‐promoting enzyme and potential therapeutic target in bone metastatic PCa.
Alexis Wilson, Mackenzie K Herroon, Shane Mecca, Laimar C Garmo, Jacob Lindquist, Shrila Rajendran, Steve M. Patrick, Izabela Podgorski   +7 more
wiley   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Galactic planetary nebulae with Wolf-Rayet nuclei. II. A consistent observational data set

, 2001
We present high resolution spectrophotometric data for 34 galactic planetary nebulae with [WC] nuclei (WRPNe).The sample includes PNe with early and late [WC] stars and some WELS.
Acker, Cai, Chu, Crowther, de Marco, Forestini, Frank, G. Stasińska, Gesicki, Groenewegen, Górny, Hamuy, Henry, Herwig, Herwig, Howard, Hu, Hummer, Iben, Iben, Keenan, Kingsburgh, Koesterke, Leisy, Leuenhagen, Leuenhagen, López, M. Peña, Maciel, Mellema, Paczynski, Parthasarathy, Perinotto, Peña, Peña, Peña, Peña, S. Medina, Schwarz, Seaton, Stasinska, Stasinska, Torres-Peimbert, Tylenda, van den Hoek, van der Hucht, Vassiliadis, Werner, Wood   +48 more
core   +1 more source