Results 11 to 20 of about 23,537 (218)

New records of arthropods from the priority Natura 2000 habitats in Estonian coastal areas [PDF]

open access: yesCheck List, 2023
The ground-dwelling arthropod fauna of Estonia has been unevenly studied, and there are significant gaps of knowledge regarding microarthropods. Our study focused on alvars and both coastal and wooded grasslands within the Natura 2000 network in Estonia.
Kaarel Sammet   +3 more
doaj   +3 more sources

Effect of gases on crystallization of heat-resistant chromium steels

open access: yesЛитьë и металлургия, 2023
It has been shown that the main influence on the crystallization of heat‑resistant chromium steels is hydrogen. It is a demodifying element of the casting structure.
E. I. Marukovich   +2 more
doaj   +1 more source

Structure – dynamic effects in metal melts, glasses and nanocrystals in dependence of temperature [PDF]

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2018
The researchers have conducted a comprehensive analysis of both the original material characteristics and the available information on phase-structural transformations during cooling, glass transition and crystallization of melts, with detailed tracking ...
E.D. Kurbanova, V.A. Polukhin
doaj   +1 more source

Effect of gases released during solidification of castings on microstructure of alloys

open access: yesЛитьë и металлургия, 2020
Thermodynamic calculation of formation of spherical gas bubbles different in water – wetting on flat surfaces by metal melt is made. This process consists of two stages.
E. I. Marukovich, V. Yu. Stetsenko
doaj   +1 more source

Heat Capacity and Thermodynamic Functions of Titanium-Manganites of Lanthanum, Lithium and Sodium of LaLi2TiMnO6 and LaNa2TiMnO6

open access: yesMolecules, 2023
Titanium-manganites of LaLi2TiMnO6 and LaNa2TiMnO6 were synthesized by the methods of ceramic technology from the oxides of lanthanum, titanium (IV), manganese (III), and the carbonates of lithium and sodium. The types of their syngony and the parameters
Bulat Kunurovich Kasenov   +6 more
doaj   +1 more source

Medicinal Plants in Semi-Natural Grasslands: Impact of Management

open access: yesPlants, 2022
Semi-natural grasslands (SNG) are valuable for their high biodiversity, cultural and landscape values. Quantitative information about medicinal plants (MP) in SNG facilitates the evaluation of ecosystem services of these habitats.
Marika Kose   +2 more
doaj   +1 more source

Karl Ristikivi Vahemere-ruum / Karl Ristikivi’s Mediterranean space

open access: yesMethis: Studia Humaniora Estonica, 2014
Karl Ristikivi (1912–1977) was a well-travelled Estonian writer whose imaginative spatial images are based equally on landscapes he actually experienced and on journeys he perhaps traced on a map with his finger and followed in his imagination.
Brita Melts
doaj   +1 more source

Configurons: Thermodynamic Parameters and Symmetry Changes at Glass Transition

open access: yesEntropy, 2008
Thermodynamic parameters of configurons – elementary excitations resulting from broken bonds in amorphous materials – are found from viscosity-temperature relationships.
Michael I. Ojovan
doaj   +1 more source

Electrochemical reduction mechanism of several oxides of refractory metals in FClNaKmelts

open access: yesHigh Temperature Materials and Processes, 2020
The dissolution characteristics and electrochemical reduction mechanism of oxides of refractory metals ZrO2, HfO2 and MoO3 in NaCl-KCl-NaF melts are studied.
Li Hui   +6 more
doaj   +1 more source

Electrochemistry of silicon in chloro-fluoride and carbonate melts [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2003
The electrochemical behavior of K2SiF6 in chloro-fluoride melts and that of SiO2 in carbonate melts has been studied. Silicon, titanium silicides, boron silicide and ternary compounds Ti-Si-B have been deposited from chloro-fluoride melts.
Devyatkin S.V.
doaj   +1 more source

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