Results 21 to 30 of about 1,651,932 (286)

Chemical evolution of Seyfert galaxies [PDF]

open access: yes, 2007
We computed the chemical evolution of Seyfert galaxies, residing in spiral bulges, based on an updated model for the Milky Way bulge with updated calculations of the Galactic potential and of the feedback from the central supermassive black hole (BH) in ...
Ballero   +5 more
core   +1 more source

Enzymatic synthesis and nanopore sequencing of 12-letter supernumerary DNA

open access: yesNature Communications, 2023
The 4-letter DNA alphabet (A, T, G, C) as found in Nature is an elegant, yet non-exhaustive solution to the problem of storage, transfer, and evolution of biological information.
Hinako Kawabe   +11 more
doaj   +1 more source

Hypernova Nucleosynthesis and Galactic Chemical Evolution [PDF]

open access: yes, 2001
We study nucleosynthesis in 'hypernovae', i.e., supernovae with very large explosion energies ($ \gsim 10^{52} $ ergs) for both spherical and aspherical explosions.
AI Macfadyen   +32 more
core   +2 more sources

Uncertainties in Galactic Chemical Evolution Models [PDF]

open access: yes, 2016
We use a simple one-zone galactic chemical evolution model to quantify the uncertainties generated by the input parameters in numerical predictions for a galaxy with properties similar to those of the Milky Way.
Côté, Benoit   +6 more
core   +2 more sources

Surface force analysis of glycine adsorption on different crystal surfaces of titanium dioxide (TiO2)

open access: yesNano Convergence, 2017
Surface force analysis with atomic force microscope (AFM) in which a single amino acid residue was mounted on the tip apex of AFM probe was carried out for the first time at the molecular level on titanium dioxide (TiO2) as a representative mineral ...
Narangerel Ganbaatar   +3 more
doaj   +1 more source

Chemical Evolution of the Juvenile Universe [PDF]

open access: yes, 2009
Only massive stars contribute to the chemical evolution of the juvenile universe corresponding to [Fe/H]
Barklem   +9 more
core   +2 more sources

Linked cycles of oxidative decarboxylation of glyoxylate as protometabolic analogs of the citric acid cycle

open access: yesNature Communications, 2018
The citric acid cycle (TCA) is a fundamental metabolic pathway to release stored energy in living organisms. Here, the authors report two linked cycles of reactions that each oxidize glyoxylate into CO2 and generate intermediates shared with the modern ...
Greg Springsteen   +4 more
doaj   +1 more source

The Oleaginous Yeast Metschnikowia pulcherrima Displays Killer Activity against Avian-Derived Pathogenic Bacteria

open access: yesBiology, 2021
Metschnikowia pulcherrima is a non-conventional yeast with potential to be used in biotechnological processes, especially those involving low-cost feedstock exploitation and biocontrol applications.
Robert H. Hicks   +4 more
doaj   +1 more source

Chemical Evolution Tomorrow [PDF]

open access: yes, 2002
The solar system is just one sample, though of course the most thoroughly studied sample, of cosmic chemistry. Some perspective on it can be gained from an overview of the chemical evolution of the Galaxy and Universe, how our knowledge of this evolution has developed, and what problems remain to be solved.
openaire   +2 more sources

A small molecule screen identifies novel inhibitors of mechanosensory nematocyst discharge in Hydra

open access: yesScientific Reports, 2021
Cnidarians are characterized by the possession of stinging organelles, called nematocysts, which they use for prey capture and defense. Nematocyst discharge is controlled by a mechanosensory apparatus with analogies to vertebrate hair cells.
Diana Hofmann   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy