Results 131 to 140 of about 8,690 (179)

Ammonium ion binding to DNA G-quadruplexes: do electrospray mass spectra faithfully reflect the solution-phase species? [PDF]

J Am Soc Mass Spectrom, 2013
Balthasart F, Plavec J, Gabelica V.
europepmc   +1 more source

SUPERNOVAE IN FLOCCULENT AND GRAND DESIGN GALAXIES

, 2015
M. McCall, F. H. Schmidt, David Dunlap
semanticscholar   +1 more source

Observational Manifestation of Chaos in the Gaseous Disk of the Grand Design Spiral Galaxy NGC 3631

Space Science Reviews, 2002
The main goal of the paper is to demonstrate the presence of chaotic trajectories in the gaseous disk of a real spiral galaxy. As an example we have chosen NGC 3631. First, we show the stationarity of the 3-D velocity field restored from the observed line-of-sight velocity field of the gaseous disk.
A. M. Fridman, O. V. Khoruzhii, E. V. Polyachenko   +2 more
semanticscholar   +3 more sources

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Observational Manifestation of Chaos in Grand Design Spiral Galaxies

, 2003
To study dynamic properties of the gaseous disk of the grand design spiral galaxy NGC 3631 we calculate the Lyapunov characteristic numbers (LCN) for different families of streamlines in the disk. For the trajectories near separatrices of the giant vortices and near saddle points presenting in the velocity field, the LCN turned out to be positive.
A. Fridman, R. Sagdeev, Oleg V. Khoruzii, E. Polyachenko   +3 more
semanticscholar   +2 more sources

Star formation in grand design and flocculent spiral galaxies

The Astrophysical Journal, 1985
An examination is conducted of the colors and neutral hydrogen contents of spiral galaxies which have been classified in the Elmegreen and Elmegreen arm morphology system. Using these data, possible differences between the star formation activity in spiral galaxies with and without classic spiral arms are delineated.
W. Romanishin
openalex   +2 more sources