Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Zara Cherkezova-Zheleva"'
Autor:
Ruzha Harizanova, Irena Mihailova, Zara Cherkezova-Zheleva, Daniela Paneva, Milena Georgieva, Dimitar Tzankov, Georgi Avdeev, Christian Rüssel
Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio, Vol 63, Iss 1, Pp 23-32 (2024)
The synthesis of glass–crystalline materials in the system Na2O/CaO/SiO2/Fe2O3 with high concentrations of Fe2O3 (20, 25 and 30 mol%) by applying the melt-quenching technique is reported. The melts spontaneously crystallize during pouring and the f
Externí odkaz:
https://doaj.org/article/c8f0f7c9073d400c8ae60c0a938eaf69
Autor:
Zara Cherkezova-Zheleva, Marian Burada, Anca Elena Sobetkii (Slobozeanu), Daniela Paneva, Sabina Andreea Fironda, Radu-Robert Piticescu
Publikováno v:
Metals, Vol 14, Iss 6, p 658 (2024)
Rare earth elements (REEs) are key materials for the development of renewable energy devices such as high-power magnets for wind turbines, electric vehicles, or fuel cells for hydrogen generation, aiming to fulfill the objectives of the European Gree
Externí odkaz:
https://doaj.org/article/f005f98237da49819fd8a0adb90b2e38
Autor:
Nikolay Petkov, Alia Tadjer, Svetlana Simova, Zara Cherkezova-Zheleva, Daniela Paneva, Radostina Stoyanova, Rositsa Kukeva, Petar Dorkov, Ivayla Pantcheva
Publikováno v:
Inorganics, Vol 12, Iss 4, p 114 (2024)
In the present study, we report the solid-state isolation and structural characterization of novel iron(III) complexes of the veterinary antibiotic monensin. Monensic acid (MonH × H2O) forms a dinuclear complex of composition with FeCl3 [FeCl(Mon)2]
Externí odkaz:
https://doaj.org/article/b6abc4238ec6437e99711d5c153fc585
Experimental and DFT Study of Monensinate and Salinomycinate Complexes Containing {Fe3(µ3–O)}7+ Core
Autor:
Nikolay Petkov, Alia Tadjer, Elzhana Encheva, Zara Cherkezova-Zheleva, Daniela Paneva, Radostina Stoyanova, Rositsa Kukeva, Petar Dorkov, Ivayla Pantcheva
Publikováno v:
Molecules, Vol 29, Iss 2, p 364 (2024)
Two trinuclear oxo-centred iron(III) coordination compounds of monensic and salinomycinic acids (HL) were synthesized and their spectral properties were studied using physicochemical/thermal methods (FT–IR, TG–DTA, TG–MS, EPR, Mössbauer spectr
Externí odkaz:
https://doaj.org/article/3694dccbad9a4714b8a6687340278f16
Autor:
Anna Dikovska, Genoveva Atanasova, Rumen Nikov, Georgi Avdeev, Zara Cherkezova-Zheleva, Daniela Paneva, Nikolay Nedyalkov
Publikováno v:
Materials, Vol 16, Iss 19, p 6446 (2023)
In this study, we present a physical method for the fabrication of oriented nanowires composed of mixed metal oxides. Pulsed laser deposition carried out in the air under atmospheric pressure was used for the production of samples. Two sets of experi
Externí odkaz:
https://doaj.org/article/71b41e94a95b4976999eb7eb7c2f062d
Publikováno v:
Crystals, Vol 13, Iss 6, p 888 (2023)
The production and trade of metals was the foundation of the economic wealth of many regions in the world, which makes the study of ancient metallurgical slags of primary importance. This type of study is relatively new for Bulgaria, where research i
Externí odkaz:
https://doaj.org/article/1e1ec70e7a0d4165a9eda0bc3462e2a7
Autor:
Maria Luisa Grilli, Anca Elena Slobozeanu, Claudio Larosa, Daniela Paneva, Iakovos Yakoumis, Zara Cherkezova-Zheleva
Publikováno v:
Crystals, Vol 13, Iss 4, p 550 (2023)
This manuscript reviews the current trends in the recovery of Platinum Group Metals (PGMs) from end-of-life autocatalysts and the aims of the recently funded Marie Sklodowska-Curie Project “Chemistry of Platinum Group Metals-CHemPGM” towards the
Externí odkaz:
https://doaj.org/article/a08012ba3a284c06a6d46b617a1d806a
Autor:
Martin Tzvetkov, Maria Milanova, Zara Cherkezova-Zheleva, Ivanka Spassova, Evgenia Valcheva, Joana Zaharieva, Ivan Mitov
Publikováno v:
Acta Chimica Slovenica, Vol 64, Iss 2, Pp 299-311 (2017)
A combination of thermal and mechanical (high energy ball milling) treatment was applied in an attempt to obtain polycrystalline mixed metal binary and ternary oxides of the type CoxZn1-xFe2O4 (x=0; 0.25; 0.5; 0.75; 1). The synthetic procedure used s
Externí odkaz:
https://doaj.org/article/25277ec50a1542e5bc8b3fb9efd97573
Autor:
Alexander M. Kalinkin, Basya I. Gurevich, Mikhail S. Myshenkov, Mikhail V. Chislov, Elena V. Kalinkina, Irina A. Zvereva, Zara Cherkezova-Zheleva, Daniela Paneva, Vilma Petkova
Publikováno v:
Minerals, Vol 10, Iss 9, p 827 (2020)
Blends of fly ash and natural calcite, mechanically activated for 0–400 s in a planetary mill, were used to synthesize geopolymers at ambient temperature. The calcite content in the blends was 0–10 wt.%. Sodium hydroxide solution was used as an a
Externí odkaz:
https://doaj.org/article/1d10548f84704a1a890b892fd57e24e7
Publikováno v:
Crystals; Volume 13; Issue 6; Pages: 888
The production and trade of metals was the foundation of the economic wealth of many regions in the world, which makes the study of ancient metallurgical slags of primary importance. This type of study is relatively new for Bulgaria, where research i