Results 21 to 30 of about 596,259 (322)

Constraints on Early Nucleosynthesis from the Abundance Pattern of a Damped Ly-alpha System at z = 2.626 [PDF]

, 2004
We have investigated chemical evolution in the young universe by analysing the detailed chemical enrichment pattern of a metal-rich galaxy at high redshift.
Brad K. Gibson, Carigi L., Gibson B. K., Jason X. Prochaska, Kroupa P., Le Brun V., Matteucci F., Nissen P. E., Schaller G., Thielemann F.-K., Tinsley B. M., Yeshe Fenner   +11 more
core   +1 more source

Chemical Enrichment of Nickel Sulfide

International Journal of Nonferrous Metallurgy, 2016
The availability of polymetallic ores is getting leaner in grade and is larger but inferior in volumes than in the past, making the extraction of copper, nickel and other non-ferrous metals metallurgically more difficult to produce. The standard technologies, including enrichment and concentration, do not provide methods for obtaining monometallic ...
Vladimir Luganov, Brajendra Mishra, Saule Baimakhanova, Rinat Akpanbayev   +3 more
openaire   +2 more sources

Flaxseed Enriched Pasta—Chemical Composition and Cooking Quality [PDF]

Foods, 2020
Pasta production is a good opportunity for product innovation in different forms. The aim of this work was to assess the use of flaxseed components for pasta production. We examined the chemical composition and cooking quality, at different contents of flaxseed flour (FF) and flaxseed cake (FC), added for pasta processing.
Piotr Zarzycki, Emilia Sykut-Domańska, Aldona Sobota, Dorota Teterycz, Ada Krawęcka, Agata Blicharz-Kania, Dariusz Andrejko, Beata Zdybel   +7 more
openaire   +3 more sources

Uncovering The Chemical Signature Of The First Stars In The Universe [PDF]

, 2008
The chemical abundance patterns observed in metal-poor Galactic halo stars contain the signature of the first supernovae, and thus allow us to probe the first stars that formed in the universe.
Bromm, Volker, Johnson, Jarrett L., Karlsson, Torgny   +2 more
core   +2 more sources

GalCEM. I. An Open-source Detailed Isotopic Chemical Evolution Code

The Astrophysical Journal Supplement Series, 2023
This is the first of a series of papers that will introduce a user-friendly, detailed, and modular Galactic Chemical Evolution Model , GalCEM , that tracks isotope masses as a function of time in a given galaxy. The list of tracked isotopes automatically
Eda Gjergo, Aleksei G. Sorokin, Anthony Ruth, Emanuele Spitoni, Francesca Matteucci, Xilong Fan, Jinning Liang, Marco Limongi, Yuta Yamazaki, Motohiko Kusakabe, Toshitaka Kajino   +10 more
doaj   +1 more source

Processing of Low-Quality Gibbsite-Kaolinite Bauxites

Metals, 2022
The results of studies on the processing of gibbsite-kaolinite bauxite are presented. The developed technology includes preliminary chemical activation and thermal transformation during enrichment to obtain a concentrate suitable for processing by the ...
Symbat Dyussenova, Rinat Abdulvaliyev, Ata Akcil, Sergey Gladyshev, Galiya Ruzakhunova   +4 more
doaj   +1 more source

Core to Cosmic Edge: SIMBA-C’s New Take on Abundance Profiles in the Intragroup Medium at z = 0

Universe
We employ the simba-c cosmological simulation to study the impact of its upgraded chemical enrichment model (Chem5) on the distribution of metals in the intragroup medium (IGrM).
Aviv Padawer-Blatt, Zhiwei Shao, Renier T. Hough, Douglas Rennehan, Ruxin Barré, Vida Saeedzadeh, Arif Babul, Romeel Davé, Chiaki Kobayashi, Weiguang Cui, François Mernier, Ghassem Gozaliasl   +11 more
doaj   +1 more source

Chemical Evolution of the Galactic Bulge as Derived from High-Resolution Infrared Spectroscopy of K and M Red Giants [PDF]

, 2006
We present chemical abundances in K and M red-giant members of the Galactic bulge derived from high-resolution infrared spectra obtained with the Phoenix spectrograph on Gemini-South.
Bessel M. S., Costes M., Edvardsson B., Gratton R. G., Gustafsson B., Katia Cunha, Nissen P. E., Plez B., Udalski A., Udalski A., Verne V. Smith   +10 more
core   +3 more sources

Enrichment of the r-process Element Europium in the Galactic Halo [PDF]

, 1998
We investigate the enrichment of europium, as a representative of r-process elements, in the Galactic halo. In present chemical evolution models, stars are assumed to be formed through shock processes by supernovae (SNe).
Barbuy B., Edvardsson B., Graton R. G., Hillebrandt W., Magain P., Schaller G., Shinya Wanajo, Takahashi K., Yuhri Ishimaru   +8 more
core   +3 more sources

Pre-galactic metal enrichment - The chemical signatures of the first stars [PDF]

, 2012
The emergence of the first sources of light at redshifts of z ~ 10-30 signaled the transition from the simple initial state of the Universe to one of increasing complexity.
Argast, D., Bland-Hawthorn, J., Choudhuri, A. R., Couchman, H. M. P., Ekström, S., Fröhlich, C., Goodwin, M., Gull, S. F., Ibata, R. A., Joss Bland-Hawthorn, Loeb, A., McWilliam, A., Rees, M. J., Searle, L., Sedov, L. I., Stahler, S. W., Takeda, Y., Torgny Karlsson, Volker Bromm, White, S. D. M., Wielen, R., Wisotzki, L., Yoon, S.-C., Zinn, R.   +23 more
core   +2 more sources