Results 61 to 70 of about 8,504 (230)

The Stochastic‐Dissipative Störmer Problem‐Trajectories and Radiation Patterns

Annalen der Physik, Volume 537, Issue 12, December 2025.
We consider charged particle motion and radiation in a dipole magnetic field, in the presence of friction and of stochastic forces. The numerical solutions of the Langevin equation reveal how these forces modify the complex dynamics of particles, and they offer some new insights into the nonlinear processes relevant to planetary radiation belts ...
Tiberiu Harko, Gabriela Raluca Mocanu
wiley   +1 more source

Dynamically Driven Evolution of Molecular Gas in the Barred Spiral Galaxy M83 Traced by CO J = 2–1/1–0 Line Ratio Variations

The Astrophysical Journal
We show the variations of the CO J = 2–1/1–0 line ratio ( R _21/10 ) across the barred spiral galaxy M83, using the 46 pc resolution data from the Atacama Large Millimeter/submillimeter Array. The R _21/10 map clearly evidences the systematic large-scale
Jin Koda, Fumi Egusa, Akihiko Hirota, Amanda M Lee, Tsuyoshi Sawada, Fumiya Maeda   +5 more
doaj   +1 more source

Characterization of Pilin A and Thioredoxin A Mutant Strains of Acinetobacter baumannii, From a Transposon Insertion Library, for Pili Production and Virulence‐Associated Properties

MicrobiologyOpen, Volume 14, Issue 6, December 2025.
Acinetobacter baumannii transposon insertion mutant strains ΔpilA and ΔtrxA display marked reductions of surface pili. The PilA (a major pilin protein) and TrxA (thioredoxin A) deficient bacteria also show attenuation in pathogenesis including the reduction of intestinal bacterial attachment, increased phagocytic uptake and decreased mortality from ...
Jadelynn Aki, Sara B. Papp, Bayley Polk, Sean Jeffreys, Megan P. Tompkins, Anwar A. Kalalah, Mark Eppinger, Guoquan Zhang, M. N. Guentzel, James P. Chambers, Bernard P. Arulanandam, Jieh‐Juen Yu   +11 more
wiley   +1 more source

Perturbed precessing ellipses as the building blocks of spiral arms in a barred galaxy with two pattern speeds [PDF]

, 2022
M. Harsoula, C. Efthymiopoulos, G. Contopoulos, A. C. Tzemos   +3 more
openalex   +2 more sources

Diverse Molecular Structures across the Whole Star-forming Disk of M83: High-fidelity Imaging at 40 pc Resolution

The Astrophysical Journal, 2023
We present Atacama Large Millimeter/submillimeter Array (ALMA) imaging of molecular gas across the full star-forming disk of the barred spiral galaxy M83 in CO( J = 1–0).
Jin Koda, Akihiko Hirota, Fumi Egusa, Kazushi Sakamoto, Tsuyoshi Sawada, Mark Heyer, Junichi Baba, Samuel Boissier, Daniela Calzetti, Jennifer Donovan Meyer, Bruce G. Elmegreen, Armando Gil de Paz, Nanase Harada, Luis C. Ho, Masato I. N. Kobayashi, Nario Kuno, Amanda M Lee, Barry F. Madore, Fumiya Maeda, Sergio Martín, Kazuyuki Muraoka, Kouichiro Nakanishi, Sachiko Onodera, Jorge L. Pineda, Nick Scoville, Yoshimasa Watanabe   +25 more
doaj   +1 more source

Invariant manifolds and the response of spiral arms in barred galaxies

, 2008
The unstable invariant manifolds of the short-period family of periodic orbits around the unstable Lagrangian points $L_1$ and $L_2$ of a barred galaxy define loci in the configuration space which take the form of a trailing spiral pattern.
Aguerri, Buta, C. Efthymiopoulos, C. Kalapotharakos, Contopoulos, Contopoulos, Contopoulos, Contopoulos, Efthymiopoulos, Fux, G. Contopoulos, Grobman, Hammed, Hartman, Kaufmann, Kaufmann, Laurikainen, Lindblad, P. Tsoutsis, Patsis, Patsis, Pfenniger, Pfenniger, Pichardo, Romero-Gomez, Romero-Gomez, Schwarzschild, Smith, Sparke, Tsoutsis, Tully, Voglis, Voglis   +32 more
core   +1 more source

Betaine‐Conjugated ß‐Peptide Foldamers: Influence of Quaternary Charge on Self‐Organization and MorphologyFormation

ChemistryOpen, Volume 14, Issue 12, December 2025.
N‐terminal betaine conjugation modifies β‐peptide helices, influencing folding and self‐organization. For [1S, 2S]‐ACPC, folding to an H12 helix was unaffected, while [1R, 2R]‐ACHC formed an H14 helix instead of H10. Alternating heterochiral oligomers made of enantiomeric pairs of trans‐ACPC showed enhanced solubility and E‐strand formation.
Nikolett Varró, Eszter Erdei, Dóra Bogdán, Eszter Kalydi, Ruth Deme, Balázs Balogh, Imola Cs. Szigyártó, Tamás Beke‐Somfai, Zoltán Varga, Pál Szabó, István M. Mándity   +10 more
wiley   +1 more source

Identification and Analysis of Galactic Bars in DESI Legacy Imaging Surveys

The Astrophysical Journal
We present a comprehensive study of bar structures in the local universe using data from the DESI Legacy Imaging Surveys. Through isophotal analysis of 232,142 galaxies, we identify bars and classify them into strong and weak categories based on ...
Wenwen Wang, Zhimin Zhou
doaj   +1 more source

Groundwater Microbial Diversity Associated With Icelandic Basaltic Subsurface Environments

Environmental Microbiology Reports, Volume 17, Issue 6, December 2025.
Overview of microbial diversity and environmental drivers in Icelandic deep basaltic aquifers. Using 16S rRNA gene metabarcoding across 22 geothermal wells spanning broad temperature, pH, and bedrock‐age gradients, the study reveals distinct bacterial and archaeal community structures shaped by temperature, pH, and host‐rock reactivity.
Juliette Bas‐Lorillot, Bénédicte Ménez, Bastien Wild, Guillaume Borrel, Manon Le Bihan, Andri Stefánsson, Jóhann Gunnarsson‐Robin, Anna Bríet Bjarkadóttir, Sigríður María Aðalsteinsdóttir, Delphine Tisserand, Damien Daval, Emmanuelle Gérard   +11 more
wiley   +1 more source

H-alpha kinematics of S4G spiral galaxies-II. Data description and non-circular motions [PDF]

, 2015
We present a kinematical study of 29 spiral galaxies included in the Spitzer Survey of Stellar Structure in Galaxies, using Halpha Fabry-Perot data obtained with the Galaxy Halpha Fabry-Perot System instrument at the William Herschel Telescope in La ...
Athanassoula, E., Beckman, John E., Bosma, Albert, Cisternas, Mauricio, Díaz-García, Simón, Elmegreen, Bruce G., Erroz-Ferrer, Santiago, Font, Joan, Ho, Luis C., Kim, Taehyun, Knapen, Johan H., Laurikainen, Eija, Leaman, Ryan, Martinez-Valpuesta, Inma, Meidt, Sharon E., Muñoz-Mateos, Juan Carlos, Salo, Heikki, Sheth, Kartik   +17 more
core   +4 more sources