Results 91 to 100 of about 1,091,879 (286)

Quartz isolatings in the shales and amphibolites of the East-Ufalei zone as a source for the production of high-purity quartz raw materials (Southern Urals)

Литосфера, 2019
Research subject. In this research, we studied lenses, nodules and interlayers of granulated quartz, which are located in amphibolites and shales in the eastern part of the Ufalei gneso-amphibolite complex.Materials and methods.
M. A. Igumentseva, L. Y. Kabanova, V. N. Anfilogov, M. V. Shtenberg, I. A. Blinov, V. M. Ryzhkov   +5 more
doaj   +1 more source

A particular case of the Jacobian conjecture [PDF]

arXiv, 2012
A particular case of the Jacobian conjecture is considered and for small dimensional cases a computational approach is ...
arxiv  

Röentgenite-(CE) and other ree fluorcarbonates from vein no. 35, Vishnevye mountains, Southern Urals

МИНЕРАЛОГИЯ (MINERALOGY), 2019
A mineral assemblage including REE fuorcarbonates (röntgenite-(Ce) Ca2Ce3(CO3)5F3, parisite-(Ce) CaCe2(CO3)3F2, synchisite-(Ce) CaCe(CO3)2F and bastnäsite-(Ce) Ce(CO3)F) was discovered at the dumps of the Vein № 35 open pit, Mt.
A. Kasatkin, R. Škoda, F. Nestola, A. Kuznetsov, E. Belogub, A. Agakhanov   +5 more
semanticscholar   +1 more source

Effect of Pest Control Strategies on Arthropod Pests of Apple in Europe: A Meta‐Analysis

Journal of Applied Entomology, EarlyView.
ABSTRACT Apple (Malus domestica Borkh.) is a major fruit crop in Europe. More than 200 phytophagous arthropod species thrive in European apple orchards, several of which are economically important pests. Due to the pest pressure on apple production, consumer demand for residue‐free products and current policies to make food production in the European ...
Ingrid Aline Bapfubusa Niyibizi, Pia Addison, Klaus Birkhofer   +2 more
wiley   +1 more source

Pele's hairs and exotic multiply twinned graphite closed-shell microcrystals in meteoritic dust of Chelyabinsk superbolide [PDF]

arXiv, 2019
When a space body enters Earth's atmosphere, its surface is exposed to high pressure and temperatures. The airflow tears off small droplets from the meteoroid forming a cloud of meteorite dust. Can new materials be synthesized in these unique conditions (high temperature, pressure, gaseous atmosphere, catalysts)?
arxiv  

Asha Series of Vendian: an orogenic complex of Timanides in the Southern Urals

Geologicheskii vestnik, 2019
The оrogenic complex of Timanides is represented in the Southern Urals by deposits of Basu, Kukkarauk and Zigan Formations of the Vendian Asha Series, which belong to molasse.
N. Sergeeva, I. Ras, V. Puchkov, A. A. Krasnobaev, O. Kozlova, A. A. Ratov, Igg UrB Ras   +6 more
semanticscholar   +1 more source

Revalidation of Enteromius karkensis (Gilchrist and Thompson 1913) (Cypriniformes: Smiliogastrinae) from the southern temperate freshwater ecoregion, South Africa

Journal of Fish Biology, Volume 106, Issue 3, Page 741-759, March 2025.
Abstract The chubbyhead barbs, a distinct group of fishes endemic to southern Africa, currently include eight valid species. Historically, Enteromius anoplus was the most widespread freshwater fish in South Africa due to synonymizations in the 1960s.
Melissa B. Martin, Albert Chakona, Wilbert T. Kadye, Martinus Scheepers   +3 more
wiley   +1 more source

Some Features of the Biology and Ecology of the Invasive Species Hordeum jubatum L. (Poaceae, Liliopsida) in the Southern Urals

Biology Bulletin, 2019
The results of our study of the invasive species Hordeum jubatum L. in various ecological–geographical conditions of the Southern Urals are presented. The 32 coenopopulations (CPs) of the species in the Bashkir Cis-Ural and Trans-Ural regions in Orenburg
L. Abramova, A. Mustafina, Y. Golovanov, Z. M. Baymurzina, A. Kryukova   +4 more
semanticscholar   +1 more source

An upgraded key for identifying all native species, subspecies and varieties of the genus Carex (Cyperaceae) in Europe and the Caucasus

Nordic Journal of Botany, EarlyView.
The last pan‐European key to Carex taxa was published in 1980 by Chater. Since that time several new species have been described, and numerous nomenclatural changes, including the recognition that the former genus Kobresia should be incorporated into Carex as C. subg. Euthyceras, have been made. This article provides a comprehensive key to identify all
Jacob Koopman, Helena Więcław, Nigel Blackstock   +2 more
wiley   +1 more source

A radius of absolute convergence for power series in many variables [PDF]

arXiv, 2010
In this paper for power series in many (real or complex)variables a radius of (absolute) convergence is offered. This radius can be evaluated by a formula similar to Cauchy-Hadamard formula and in one variable case they are same.
arxiv