Results 81 to 90 of about 52,678 (266)

The Extremely Low Mechanical Force Generated by Nano‐Pulling Induces Global Changes in the Microtubule Network, Nuclear Morphology, and Chromatin Transcription in Neurons

Small, EarlyView.
Nano‐pulling induces stabilization, reorganization, and reorientation of the microtubule network. The nucleus of stretched cells experiences increased lateral tension, becomes more spherical, and develops surface grooves. At the level of gene expression regulation, changes in nuclear morphology induce global chromatin remodeling, leading to reduced ...
Alessandro Falconieri, Lorenzo Da Palmata, Valentina Cappello, Tiziana Julia Nadjeschda Schmidt, Pietro Folino, Barbara Storti, Ranieri Bizzarri, Vittoria Raffa   +7 more
wiley   +1 more source

The V_c-sigma_c relation in high and low surface brightness galaxies

, 2004
We investigate the relation between the asymptotic circular velocity, V_c, and the central stellar velocity dispersion, sigma_c, in galaxies. We consider a new sample of high surface brightness spiral galaxies (HSB), low surface brightness spiral ...
Bertola, F., Bonta`, E. Dalla, Coccato, L., Corsini, E. M., Pizzella, A., Sarzi, M.   +5 more
core   +1 more source

Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK

Journal of Research in Science Teaching, EarlyView.
ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson, Anne‐Marie Cederqvist   +1 more
wiley   +1 more source

Giant Halos in Dwarf Irregular Galaxies vs. Dwarf Elliptical Galaxies

, 2005
We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the ...
Hwang, Narae, Lee, Myung Gyoon
core   +1 more source

From cells to pixels: A decision tree for designing bioimage analysis pipelines

Journal of Microscopy, EarlyView.
Abstract Bioimaging has transformed our understanding of biological processes, yet extracting meaningful information from complex datasets remains a challenge, particularly for biologists without computational expertise. This paper proposes a simple general approach, to help identify which image analysis methods could be relevant for a given image ...
Elnaz Fazeli, Robert Haase, Michael Doube, Kota Miura, David Legland   +4 more
wiley   +1 more source

Advanced Life Peaked Billions of Years Ago According to Black Holes

Galaxies, 2023
The link between black holes and star formation allows for us to draw a connection between black holes and the places and times when extraterrestrial intelligences (ETIs) had a greater chance of emerging.
David Garofalo
doaj   +1 more source

The luminosity function of field galaxies

, 2011
Schmidt's method for construction of luminosity function of galaxies is generalized by taking into account the dependence of density of galaxies from the distance in the near Universe.
A Dressler, A Dressler, A Jr, A Sandage, A Sandage, A. P. Mahtessian, AI Zabludoff, ALB Ribeiro, AP Mahtessian, AP Mahtessian, B Binggeli, B Garilli, B Garilli, BC Bromley, BM Garilli, C Marinoni, CA Valotto, CNA Willmer, D Lynden-Bell, DH Gudehus, E Gaidos, G Efstathiou, H Jerjen, H Lin, H Muriel, HC Ferguson, J Choloniewski, J Huchra, J Loveday, JE Felten, JF Nicol, LF Barrientos, M Paolillo, M Ramella, M Schmidt, MA Arakelyan, MJ Cuesta-Bolao, MM Colless, N Trentham, N Trentham, O Lopez-Cruz, O Lopez-Cruz, P Schechter, PM Lugger, RO Marzke, S Andreon, S Andreon, S Rayzy, SE Zepf, SL Lumsden, SP Driver, T Goto, VYu Terebizh, WR Oegerle, WR Oegerle   +54 more
core   +1 more source

The Hierarchical Origins of Observed Galaxy Morphology [PDF]

, 2013
Galaxies grow primarily via accretion-driven star formation in discs and merger-driven growth of bulges. These processes are implicit in semi-analytical models of galaxy formation, with bulge growth in particular relating directly to the hierarchical ...
De Lucia, Gabriella, Erwin, Peter, Fontanot, Fabio, Monaco, Pierluigi, Wilman, David J.   +4 more
core   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Investigating the Impact of Supernova Feedback on Satellites in Elliptical Galaxies

The Astrophysical Journal
We investigate the influence of supernova (SN) feedback on the satellites of elliptical host galaxies using hydrodynamic simulations. Utilizing a modified version of the GADGET-3 code, we perform cosmological zoom-in simulations of 11 elliptical galaxies
Sumi Kim, Ena Choi, Amanda C. N. Quirk, Rachel S. Somerville, Thorsten Naab, Jeremiah P. Ostriker, Michaela Hirschmann   +6 more
doaj   +1 more source