Results 41 to 50 of about 531,231 (335)

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

Can Protostellar Outflows Set Stellar Masses?

The Astrophysical Journal, 2023
The opening angles of some protostellar outflows appear too narrow to match the expected core–star mass efficiency (SFE) = 0.3–0.5, if the outflow cavity volume traces outflow mass, with a conical shape and a maximum opening angle near 90°.
Philip C. Myers, Michael M. Dunham, Ian W. Stephens   +2 more
doaj   +1 more source

Rotating molecular outflows: the young T Tauri star in CB26

, 2008
The disk-outflow connection is thought to play a key role in extracting excess angular momentum from a forming proto-star. Though jet rotation has been observed in a few objects, no rotation of molecular outflows has been unambiguously reported so far ...
A. Dutrey, Anderson, Anglada, Artymowicz, Bacciotti, Bacciotti, Bisschop, Chen, Chrysostomou, Cieza, Codella, Coffey, Coffey, D. Semenov, Downes, Dutrey, F. Gueth, Gueth, Guilloteau, Guilloteau, Gullbring, Haisch, Hartigan, Henning, K. Schreyer, Lada, Launhardt, Launhardt, Lee, Lee, Lenzen, Masciadri, Ossenkopf, Pavlyuchenkov, Pety, R. Launhardt, Richer, Rodríguez, S. Guilloteau, Shu, Siess, Simon, Stecklum, Terquem, Th. Henning, V. Piétu, Woitas, Wolf, X. Chen, Ya. Pavlyuchenkov   +49 more
core   +3 more sources

Tracing the Bipolar Outflow from Orion Source I [PDF]

, 2009
Using CARMA, we imaged the 87 GHz SiO v=0 J=2-1 line toward Orion-KL with 0.45 arcsec angular resolution. The maps indicate that radio source I drives a bipolar outflow into the surrounding molecular cloud along a NE--SW axis, in agreement with the model
A. D. Bolatto, Chandler, Cunningham, D. N. Friedel, D. P. Woody, Doeleman, Doi, Gezari, Greenhill, Gómez, J. W. Lamb, M. C. H. Wright, M. W. Pound, R. L. Plambeck, Rodríguez, S. L. Scott, S. L. Widicus Weaver, Sandstrom, Terquem, Wright, Zapata   +20 more
core   +2 more sources

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

FEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

Hourglass Magnetic Field of a Protostellar System

Universe
An hourglass-shaped magnetic field pattern arises naturally from the gravitational collapse of a star-forming gas cloud. Most studies have focused on the prestellar collapse phase, when the structure has a smooth and monotonic radial profile.
Shantanu Basu, Xiyuan Li, Gianfranco Bino   +2 more
doaj   +1 more source

Cardiac Effects of a Single Dose of Pimobendan in Cats With Hypertrophic Cardiomyopathy; A Randomized, Placebo-Controlled, Crossover Study

Frontiers in Veterinary Science, 2019
Background: Pimobendan has been shown to impart a significant survival benefit in cardiomyopathic cats who receive it as part of heart failure therapy. However, use of pimobendan remains controversial in cats with hypertrophic cardiomyopathy (HCM) due to
Maureen S. Oldach, Yu Ueda, Eric S. Ontiveros, Samantha L. Fousse, Samantha P. Harris, Joshua A. Stern   +5 more
doaj   +1 more source

Three-Dimensional Simulations of Dynamics of Accretion Flows Irradiated by a Quasar

, 2008
We study the axisymmetric and non-axisymmetric, time-dependent hydrodynamics of gas that is under the influence of the gravity of a super massive black hole (SMBH) and the radiation force produced by a radiatively efficient flow accreting onto the SMBH ...
Awaki, Bisnovatyi-Kogan, Blanco, Blandford, Bondi, Bottorff, Brighenti, Cecil, Ciotti, Ciotti, Ciotti, Ciotti, Crenshaw, Crenshaw, Crenshaw, Daniel Proga, Das, Das, Dorodnitsyn, Dorodnitsyn, Everett, Hawley, Hayes, Hopkins, Hutchings, Janiuk, Kato, King, Komossa, Komossa, Kraemer, Kraemer, Krolik, Krolik, Kurosawa, Königl, Li, Lynden Bell, Marconi, Murray, Nakamura, Nelson, Ohsuga, Onken, Papaloizou, Park, Park, Peterson, Phinney, Proga, Proga, Proga, Proga, Proga, Proga, Proga, Ruiz, Ruiz, Ryuichi Kurosawa, Shakura, Springel, Tremonti, Vernaleo, Vestergaard, Walsh, Wang   +65 more
core   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source

Jets, Disks and Spectral States of Black Holes

, 2000
We show that outflow rates in jets directly depend on the spectral states of black holes. In particular, in soft states, when the Comptonized electrons are cold, outflow rate is close to zero.
Chakrabarti, Sandip K.
core   +2 more sources