Results 71 to 80 of about 1,168,780 (297)

A Census of the Stellar Populations in the Sco-Cen Complex

open access: yesThe Astronomical Journal, 2021
I have used high-precision photometry and astrometry from the early installment of the third data release of Gaia (EDR3) to perform a survey for members of the stellar populations within the Sco-Cen complex, which consist of Upper Sco, UCL/LCC, the V1062
K. L. Luhman
doaj   +1 more source

The Origin of the Initial Mass Function

open access: yes, 2006
PPV conference paper, 16 pages, 11 ...
Bonnell, Ian A.   +2 more
openaire   +2 more sources

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

open access: yesFEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil   +4 more
wiley   +1 more source

The stellar initial mass function

open access: yes, 2014
[[abstract]]If magnetic fields are frozen in gravitational collapse, the resulting magnetic tension can prevent the outer part of the subcritical envelope of a molecular cloud from falling in with the supercritical core.
Shu, F.H.;Li, Z.Y.;Allen, A.
core   +1 more source

Self-regulated galaxy evolution within a self-consistently varying galaxy-wide initial mass function

open access: yesAstronomy & Astrophysics
Context. Semi-analytical evolution models of galaxies are a useful and computationally inexpensive tool for a fast assessment of individual properties and their evolution. In this work, specifically the influence of a metallicity- and star-formation-rate-
Hof Lukas   +3 more
doaj   +1 more source

On the function describing the stellar initial mass function [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2012
We propose a functional form for the IMF, the L_3 IMF, which is a natural heavy-tailed approximation to the log-normal distribution. It is composed of a low-mass power law and a high mass power-law which are smoothly joined together. Three parameters are needed to achieve this.
openaire   +2 more sources

The human gut microbiome across the life course

open access: yesFEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero   +4 more
wiley   +1 more source

Comparison of physical characteristics of mass and luminosity function of disk systems in barred and unbarred spiral galaxies

open access: yesمجلة بغداد للعلوم
Among the most important ways to investigate galaxies' distribution over cosmic time is the luminosity function LF in terms of baryonic disc mass ψS(Mb), magnitude  .
Al Najm M.N.   +2 more
doaj   +1 more source

A METHOD FOR MEASURING VARIATIONS IN THE STELLAR INITIAL MASS FUNCTION [PDF]

open access: yesThe Astrophysical Journal, 2010
We present a method for investigating variations in the upper end of the stellar Initial Mass Function (IMF) by probing the production rate of ionizing photons in unresolved, compact star clusters with ...
Calzetti, D.   +5 more
openaire   +3 more sources

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

open access: yesFEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto   +3 more
wiley   +1 more source

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