Results 111 to 120 of about 216,058 (291)

Discovery of magnetic fields in the very young, massive stars W601 (NGC 6611) and OI 201 (NGC 2244)

, 2008
Context: Recent spectropolarimetric observations of Herbig Ae/Be stars have yielded new arguments in favour of a fossil origin for the magnetic fields of intermediate mass stars.
Balog, Belikov, Bohlender, Brown, C. Catala, C. P. Folsom, Catala, Chen, D. Bohlender, de Winter, Donati, Ducati, Dufton, E. Alecian, G. A. Wade, Guarcello, Hensberge, Hubeny, Hubeny, Høg, J. D. Landstreet, J. Grunhut, J.-C. Bouret, J.-F. Donati, Kumar, Landstreet, Morel, Palla, Park, Pérez, S. Bagnulo, T. Boehm, Vrancken, Wade, Wade   +34 more
core   +3 more sources

Multi‐omics and low‐input proteomics profiling reveals dynamic regulation driving pluripotency initiation in early mouse embryos

FEBS Open Bio, EarlyView.
Mouse pre‐implantation development involves a transition from totipotency to pluripotency. Integrating transcriptomics, epigenetic profiling, low‐input proteomics and functional assays, we show that eight‐cell embryos retain residual totipotency features, whereas cytoskeletal remodeling regulated by the ubiquitin‐proteasome system drives progression ...
Wanqiong Li, Xi Xiao, Lingbin Qi, Chanyi Li, Sirui Song, Jiaying Qin, Zhigang Xue, Jinfeng Xue, Huaifang Li   +8 more
wiley   +1 more source

Lithium and chromospherically active single giants [PDF]

Nine chromospherically active single K giants were identified from surveys of chromospherically active stars. The stars have v sin i's ranging from 6 to 46 km/sec.
Fekel, Francis C.
core   +1 more source

Lynds 1622: a nearby star forming cloud projected on Orion B?

, 2008
We present results of optical spectroscopic and photometric observation of the pre-main sequence stars associated with the cometary shaped dark cloud Lynds 1622, and 12CO and 13CO observations of the cloud.
A. Gáspár, A. Kawamura, Adams, Bally, Barrado, Blaauw, Brown, Casassus, Cieza, Cohen, Cohen, Comerón, Correia, de Geus, Elmegreen, Elmegreen, Engelbracht, Fabricant, Furlan, Gaustad, Glass, Gordon, Gutermuth, Hartigan, Herbig, Herbig, Jaschek, Jayawardhana, Kenyon, Kirkpatrick, Knude, Kun, Kutner, Lada, Landolt, Le Borgne, Lee, Lee, Luhman, M. Kun, Maddalena, Martín, Mekkaden, Meyer, Mizuno, Mizuno, N. Mizuno, Nielbock, Ogawa, Ogura, Palla, Preibisch, Racine, Reach, Reipurth, Reipurth, Reipurth, Robitaille, Rodríguez, S. J. Kenyon, Wainscoat, Weaver, White, Wilson, Y. Fukui, Z. Balog   +65 more
core   +1 more source

Magnetic activity in pre-main-sequence stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1987
Certaines etoiles de la pre-sequence principale pourraient contenir des champs magnetiques fossiles dans leurs couches externes, plus forts que tout champ dynamo. Si l'activite de surface est relative au champ magnetique, les etoiles exhiberaient une activite superieure a celle sans champs fossiles significatifs.
openaire   +1 more source

The cooperative regulation of miR‐221 by APE1 and AUF1 impacts p27Kip1 defining a miR signature relevant for cervical cancer

FEBS Open Bio, EarlyView.
A regulatory axis involving APE1, AUF1, and miR‐221 is proposed. Pri‐miR‐221 is processed by DROSHA and DICER to generate mature miR‐221, which targets p27Kip1 mRNA. APE1 and AUF1 compete for pre‐miR‐221 binding. Reduced APE1/AUF1 levels impair miR‐221 biogenesis, decrease p27Kip1 mRNA degradation, and promote cell cycle progression, chemoresistance ...
Matilde Clarissa Malfatti, Nicolò Gualandi, Gianluca Tell, Giulia Antoniali   +3 more
wiley   +1 more source

Age spreads and the temperature dependence of age estimates in Upper Sco

, 2017
Past estimates for the age of the Upper Sco Association are typically 11-13 Myr for intermediate-mass stars and 4-5 Myr for low-mass stars. In this study, we simulate populations of young stars to investigate whether this apparent dependence of estimated
Fang, Qiliang, Herczeg, Gregory J., Rizzuto, Aaron   +2 more
core   +2 more sources

Dihydroorotate dehydrogenase (DHODH) regulates trophoblast syncytialization through organelle stress–induced cellular senescence

FEBS Open Bio, EarlyView.
The inhibition of mitochondrial dihydroorotate dehydrogenase (DHODH) impairs syncytialization and induces cellular senescence via mitochondrial and endoplasmic reticulum stress in human trophoblast stem cells, elevating sFlt1/PlGF levels, a hallmark of placental dysfunction in hypertensive disorders of pregnancy.
Kanoko Yoshida, Kazuya Kusama, Ayaka Horiuchi, Yu Kawaguchi, Atsuya Tsuru, Mikihiro Yoshie, Kazuhiro Tamura   +6 more
wiley   +1 more source

Disk-locking Regulates Stellar Rotation in Young Clusters: Insights from NGC 2264

The Astrophysical Journal
Many young clusters possess extended main sequences, a phenomenon commonly ascribed to stellar rotation. However, the mechanism behind their very wide stellar rotation distributions remains unclear.
Yutian Bu, Chenyu He, Min Fang, Chengyuan Li   +3 more
doaj   +1 more source

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