Results 81 to 90 of about 491,052 (394)

Novae and accretion disc evolution [PDF]

International Astronomical Union Colloquium, 1986
AbstractAt outburst the classical nova generates an extended optically-thick wind driven by radiation pressure in the continuum. At maximum light the optical luminosity is close to the Eddington-limit. The subsequent decline illustrates the interaction between radiation and matter in a wind which gradually thins as the mass loss rate falls at an ...
openaire   +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

Episodic accretion, protostellar radiative feedback, and their role in low-mass star formation

, 2012
Protostars grow in mass by accreting material through their discs, and this accretion is initially their main source of luminosity. The resulting radiative feedback heats the environments of young protostars, and may thereby suppress further ...
Hubber, David A., Stamatellos, Dimitris, Whitworth, Anthony P.   +2 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

THREE-DIMENSIONAL HYDRODYNAMICAL MODELING OF MASS TRANSFER IN THE CLOSE BINARY SYSTEM LYR WITH AN ACCRETOR WIND.III

Odessa Astronomical Publications, 2007
The present paper continues our work on numerical modelling of formation of the accretion disc in CBS β Lyrae taking into account the stellar wind of the accretor.
V. V. Nazarenko, L. V. Glazunova
doaj   +1 more source

Dead Zones around Young Stellar Objects: FU Orionis Outbursts and Transition Discs

, 2012
We perform global time-dependent simulations of an accretion disc around a young stellar object with a dead zone (a region where the magneto-rotational instability cannot drive turbulence because the material is not sufficiently ionised).
Livio, Mario, Lubow, Stephen H., Martin, Rebecca G., Pringle, J. E.   +3 more
core   +1 more source

Accretion disc dynamo activity in local simulations spanning weak-to-strong net vertical magnetic flux regimes [PDF]

, 2015
Strongly magnetized accretion discs around black holes have attractive features that may explain enigmatic aspects of X-ray binary behaviour. The structure and evolution of these discs are governed by a dynamo-like mechanism, which channels part of the ...
G. Salvesen, J. Simon, P. Armitage, M. Begelman   +3 more
semanticscholar   +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

Broken discs: warp propagation in accretion discs [PDF]

Monthly Notices of the Royal Astronomical Society, 2012
8 pages, 9 figures.
Christopher J. Nixon, Andrew R. King
openaire   +3 more sources

Inferring the physics of protoplanetary disc evolution from the irradiated Cygnus OB2 region

Astronomy & Astrophysics
Context. Determining the physical processes driving protoplanetary disc evolution is of paramount importance for understanding planet formation. Our current understanding has crystallised around two possible evolution scenarios: turbulent viscosity and ...
Weder Jesse, Winter Andrew J., Mordasini Christoph   +2 more
doaj   +1 more source