Results 91 to 100 of about 410,793 (220)

OBSERVATIONAL EVIDENCE AGAINST LONG-LIVED SPIRAL ARMS IN GALAXIES [PDF]

, 2011
We test whether the spiral patterns apparent in many large disk galaxies should be thought of as dynamical features that are stationary in a corotating frame for ≳ tdyn, as implied by the density wave approach for explaining spiral arms.
K. Foyle, H. Rix, C. Dobbs, A. Leroy, F. Walter   +4 more
semanticscholar   +1 more source

A Role for the Plastidial GPT2 Translocator in the Modulation of Lignin Biosynthesis

Plant, Cell &Environment, EarlyView.
ABSTRACT Engineering plants with reduced lignin content can result in pleiotropic growth defects. In stems of Arabidopsis plants with reduced expression of hydroxycinnamoyl CoA: shikimate hydroxycinnamoyl transferase (HCT), the plastidial glucose 6‐phosphate: phosphate co‐transporter GPT2 is highly overexpressed, and this coincides with reduced lignin ...
Aditi Subramani Raju, Abira Sahu, Chunliu Zhuo, Wayne K. Versaw, Richard A. Dixon   +4 more
wiley   +1 more source

Stellar diffusion in barred spiral galaxies [PDF]

, 2011
We characterize empirically the radial diffusion of stars in the plane of a typical barred disk galaxy by calculating the local spatial diffusion coefficient and diffusion time-scale for bulge-disk-halo N-body self-consistent systems which initially ...
M. Brunetti, C. Chiappini, D. Pfenniger
semanticscholar   +1 more source

Plasticity of the heart in response to changes in physical activity

The Journal of Physiology, EarlyView.
Abstract figure legend The heart adapts to changes in physical activity, with inactivity (e.g. bed rest or spaceflight) causing cardiac atrophy and ventricular stiffening, and endurance exercise training leading to eccentric hypertrophy and improved ventricular compliance.
Eric T. Hedge, Tiffany L. Brazile, Richard L. Hughson, Benjamin D. Levine   +3 more
wiley   +1 more source

In Vitro Validation of Pulsed Electromagnetic Field (PEMF) as an Effective Countermeasure Against Inflammatory‐Mediated Intervertebral Disc Degeneration

JOR SPINE, Volume 8, Issue 2, June 2025.
ABSTRACT Background Intervertebral disc (IVD) degeneration (IDD) is the main contributor to chronic low back pain (LBP), the leading cause of disability worldwide, with a significant impact on the quality of life and health of common people. The etiology of IDD is still unclear, but it has been largely demonstrated the crucial role of inflammation and ...
Laura Guarnaccia, Laura Begani, Silvana Pileggi, Mauro Pluderi, Stefano Borsa, Claudia Fanizzi, Massimiliano Domenico Rizzaro, Giorgio Fiore, Laura Fontana, Rolando Campanella, Chiara Cordiglieri, Chiara Gaudino, Giovanni A. Alotta, Monica Miozzo, Emanuele Garzia, Emanuela Barilla, Lorenzo Fassina, Laura Riboni, Marco Locatelli, Giovanni Marfia, Stefania E. Navone   +20 more
wiley   +1 more source

STELLAR TIDAL STREAMS IN SPIRAL GALAXIES OF THE LOCAL VOLUME: A PILOT SURVEY WITH MODEST APERTURE TELESCOPES [PDF]

, 2010
Within the hierarchical framework for galaxy formation, minor merging and tidal interactions are expected to shape all large galaxies to the present day.
D. Martínez-Delgado, D. Martínez-Delgado, R. J. Gabany, Ken Crawford, S. Zibetti, S. Majewski, H. Rix, J. Fliri, J. Carballo-Bello, Daniella C. Bardalez-Gagliuffi, J. Peñarrubia, T. Chonis, B. Madore, I. Trujillo, M. Schirmer, D. McDavid   +15 more
semanticscholar   +1 more source

Why Schonland Failed in His Search for Runaway Electrons From Thunderstorms

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 10, 28 May 2025.
Abstract B.F.J. Schonland, advised and encouraged by C.T.R. Wilson, made two unsuccessful searches for runaway electrons from thunderstorms in the 1930s. These findings stand in marked contrast with research results over the last decade and ironically set this field of research back many decades.
A. Chilingarian, E. Williams, G. Hovsepyan, H. Mkrtchyan   +3 more
wiley   +1 more source

Photometric scaling relations of lenticular and spiral galaxies [PDF]

, 2010
Photometric scaling relations are studied for S0 galaxies and compared with those obtained for spirals. New two-dimensional multi-component decompositions are presented for 122 early-type disc galaxies, using deep K s -band images.
E. Laurikainen, H. Salo, R. Buta, J. Knapen, S. Comer'on   +4 more
semanticscholar   +1 more source

THE OPACITY OF SPIRAL GALAXY DISKS [PDF]

, 2007
The opacity of foreground spiral disks can be probed from the number of distant galaxies seen through them. To calibrate this number for effects other than the dust extinction, Gonzalez et al. (1998) developed the "Synthetic Field Method". A synthetic field is an extincted Hubble Deep Field added to the science field.
Holwerda, Benne W., González, R. A., Allen, Ronald J., Van Der Kruit, P. C.   +3 more
openaire   +2 more sources

Solar Cycle Detected in Natural Tritium of Ice Layers Before the Nuclear Era

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 9, 16 May 2025.
Abstract The 11‐year cycle of the solar activity affects the production rate of cosmogenic isotopes. For tritium in precipitation, it has been just recently proven that this link exists. Here we show, for the first time, a tritium ice core time series which extends back to 1923, covering a time period that avoids the presence of artificial tritium from
L. Palcsu, E. László, G. Surányi, M. Túri, D. Vargas, M. Veres, A. Cauquoin, L. Zákány, R. Janovics, I. Csige, M. Temovski   +10 more
wiley   +1 more source