Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Lachezar Radev"'
Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio, Vol 63, Iss 5, Pp 330-345 (2024)
A glass-ceramic in the CaO–P2O5–SiO2 system, which contains two polymorphic modifications of tricalcium phosphate – whitlockite, β-Ca3(PO4)2 and α-Ca3(PO4)2, has been synthesized by the sol–gel method and thermal treatment up to 1200 °C. T
Externí odkaz:
https://doaj.org/article/79751a3cd58548dcb997e7a9d950fffc
Autor:
Lachezar Radev, Irena Michailova, Silviya Stateva, Diana Zaimova, Hristo Georgiev, Margarita Apostolova
Publikováno v:
Processing and Application of Ceramics, Vol 11, Iss 2, Pp 136-146 (2017)
Bioactive composite materials were prepared by mixing 20 wt.% of silk fibroin (SF) and 80 wt.% of glassceramics from CaO-SiO2-P2O5-MgO system. In vitro bioactivity of the prepared composites was evaluated in 1.5 simulated body fluid (1.5 SBF) in stat
Externí odkaz:
https://doaj.org/article/2dacd18b606043a186cef7af3a03f9a1
Publikováno v:
Processing and Application of Ceramics, Vol 10, Iss 2, Pp 57-66 (2016)
The main purpose of the presented article is the preparation of novel glass-ceramics in CaO-SiO2-P2O5-MgO system and evaluation of carbonate apatite formation after soaking in TRIS-HCl buffer solution for 14 days. The investigated samples were prepar
Externí odkaz:
https://doaj.org/article/326b493308b746b994e728e1b13ecf48
Autor:
Lachezar Radev
Publikováno v:
Processing and Application of Ceramics, Vol 8, Iss 3, Pp 155-166 (2014)
Nowadays there is a substantial practical interest in the in vitro bioactivity of calcium silicate phosphate (CSP) glass-ceramics and carbonate apatite (CO3HA) formation on their surfaces after in vitro test in simulated body fluid (SBF). The main pu
Externí odkaz:
https://doaj.org/article/c708d43edd1a4cc4a8ba4122b7e82de9
Autor:
Ahmed A. Al-Ghamdi, Abdullah G. Al-Sehemi, Nikolay Dishovsky, Gabriela L. Atanasova, Lachezar Radev, Nikolay T. Atanasov, Irena Mihailova, Petrunka Malinova
Publikováno v:
Journal of Rubber Research. 24:77-92
Lately silver has become extremely important among alloying additives used to produce glassy materials with specific tailored properties. The aim of the study is to characterize bioactive glasses belonging to the CaO–SiO2–P2O5–Ag2O system by SE
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd3ae49fe22b245023e408d120914f73
https://doi.org/10.1007/s42464-020-00075-3
https://doi.org/10.1007/s42464-020-00075-3
Autor:
Nikolay Dishovsky, Gabriela L. Atanasova, Abdullah G. Al-Sehemi, Petrunka Malinova, Nikolay T. Atanasov, Ahmed A. Al-Ghamdi, Irena Mihailova, Lachezar Radev
Publikováno v:
Journal of Polymer Engineering. 40:666-675
Glass ceramics from the CaO–P2O5–SiO2 system were synthesized. They were characterized by XRD, SEM and EDX methods. It was found that they contain two crystalline [Whitlockite, Ca3 (PO4)2 and Hydroxylapatite, Ca5 (PO4)3 (OH)] and one residual amo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ddd40deb95822e95d436f422d8a6dfb
https://doi.org/10.1515/polyeng-2020-0043
https://doi.org/10.1515/polyeng-2020-0043
Autor:
Lachezar Radev, Vladimir Hristov, Irena Michailova, Maria H. V. Fernandes, Isabel M. M. Salvado
Publikováno v:
Processing and Application of Ceramics, Vol 5, Iss 3, Pp 161-170 (2011)
In this work we present the experimental results on synthesis, structure evolution and in vitro bioactivity of collagen-silicocarnotite-chondroitin sulphate composites. The obtained samples were synthesised by mixing collagen (C) and silicocarnotite
Externí odkaz:
https://doaj.org/article/c8147f86006c49048044e71e8d96d822
Autor:
Lachezar Radev, Vladimir Hristov, Irena Michailova, Maria Helena V. Fernandes, Isabel Miranda M. Salvado
Publikováno v:
Processing and Application of Ceramics, Vol 4, Iss 1, Pp 15-24 (2010)
The main purpose of the paper is the evaluation of the influence of chemical composition of the gel of the synthesized 15CaO·0.5P2O5·6SiO2 glass-ceramic on the structure, crystallization behaviour and in vitro bioactivity in static conditions for d
Externí odkaz:
https://doaj.org/article/8968002faf774a6e81d4ac85b648861e
Publikováno v:
Processing and Application of Ceramics, Vol 3, Iss 3, Pp 125-130 (2009)
In the present work the results of the research on the sol-gel synthesis and structure of cordierite (2MgO·2Al2O3·5SiO2), tialite (Al2O3·TiO2) and cordierite/tialite glass-ceramics as well cordierite containing 2 wt.% of Co and Co+Cu have been des
Externí odkaz:
https://doaj.org/article/c6ae24c5d1284e5f8e0b41f21ab7b144
Autor:
Lachezar Radev, Liliana Pavlova, Bisserka Samuneva, Elena Kashchieva, Irena Mihailova, Maria Zaharescu, Barbara Malic, Luminita Predoana
Publikováno v:
Processing and Application of Ceramics, Vol 2, Iss 2, Pp 103-108 (2008)
LaCoO3 powders are studied because they exhibit interesting electrical, magnetic and catalytic properties. In this paper, new synthesized La2O3-CoO-SiO2 powders with different quantity of silica were prepared via solgel method in aqua media, starting
Externí odkaz:
https://doaj.org/article/95445e8d307c4f3f908e6fc05a9d3708