Results 71 to 80 of about 873,650 (292)

Abundances in Magnetic Ap Stars [PDF]

International Astronomical Union Colloquium, 1993
AbstractThe spatial inhomogeneities, Zeeman broadening, and extreme abundance anomalies have thus far prevented definitive analyses of magnetic CP stars. Nevertheless, the abundance anomalies are so large that many of them have been known for decades. Abundance excesses of iron-peak elements of factors of 10 to 100 are common.
openaire   +1 more source

Magnetic fields in A stars besides Ap stars

, 2014
I review ongoing efforts to understand the incidence of magnetism in intermediate-mass stars that are different from the magnetic Ap stars. This includes the search for magnetic fields in chemically peculiar stars of the Am and HgMn types as well as in ...
Kochukhov, Oleg,
core  

An outer membrane vesicle‐associated two‐track model for enterotoxigenic Bacteroides fragilis oncogenesis

Molecular Oncology, EarlyView.
Enterotoxigenic Bacteroides fragilis is a gut bacterium linked to bowel cancer. We propose that its toxin acts along two routes: at the cell surface, cutting the adhesion protein E‐cadherin and triggering inflammation; and inside the cell, delivered by bacterial vesicles, switching on NOD1 and cancer stem cell programs.
Kangchan Choi, Sang‐Hyeon Yoo, Ki‐Jong Rhee   +2 more
wiley   +1 more source

The CAOS survey of chemically peculiar binaries: Orbital solutions and abundance patterns for ten new SB2 systems

Astronomy & Astrophysics
Context. This work is part of a long-term observational campaign conducted at the Catania Astrophysical Observatory to investigate the chemical and dynamical properties of Ap and Am stars.
Catanzaro G., Posiłek N., Giarrusso M.
doaj   +1 more source

Multiplicity of rapidly oscillating Ap stars

, 2012
Context. Rapidly oscillating Ap (roAp) stars have rarely been found in binary or higher order multiple systems. This might have implications for their origin. Aims. We intend to study the multiplicity of this type of chemically peculiar stars,
M. Schöller, S. Correia, S. Hubrig, D. W. Kurtz   +3 more
core   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Magnetic fields of Ap stars from full Stokes spectropolarimetric observations

, 2014
Current knowledge about stellar magnetic fields relies almost entirely on observations of circular polarization. Few objects have been observed in all four Stokes parameters.
Kochukhov, Oleg,, Rusomarov, Naum,, Piskunov, Nikolai,   +2 more
core  

Ionomycin suppresses cancer cell growth by disrupting mitochondrial transcription

FEBS Open Bio, EarlyView.
In this study, we identify a new function for the selective Ca2+ ionophore, ionomycin, as an inhibitor of mitochondrial transcription. Both total and nascent RNA analyses revealed that ionomycin treatment reduces the transcription of mitochondrial genes.
Lishen Wang, Mingqiang Deng, Dongmei He, Diqin Lai, Dongjun Liu, Dengyong Zhu, Zhenhua Zhang, Peng Tang, Chuanman Zhou, Menghui Yin, Xichen Bao   +10 more
wiley   +1 more source

Slowly Rotating Peculiar Star BD00°1659 as a Benchmark for Stratification Studies in Ap/Bp Stars

Galaxies
We present the results of a self-consistent analysis of the magnetic silicon star BD+00°1659, based on its high-resolution spectra taken from the ESPaDOnS archive (R = 68,000).
Anna Romanovskaya, Tatiana Ryabchikova, Yury Pakhomov, Ilya Potravnov, Tatyana Sitnova   +4 more
doaj   +1 more source

Light-Time Effect and Mass Transfer in the Triple Star SW Lyncis [PDF]

Journal of Astronomy and Space Sciences, 1999
In this paper all the photoelectric times of minimum for the triple star SW Lyn have been analyzed in terms of light-time e ect due to the third-body and secular period decreases induced by mass transfer process.
Chun-Hwey Kim
doaj