Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Ivanka Stoycheva"'
Autor:
Pavlina Dolashka, Karina Marinova, Petar Petrov, Ventsislava Petrova, Bogdan Ranguelov, Stella Atanasova-Vladimirova, Dimitar Kaynarov, Ivanka Stoycheva, Emiliya Pisareva, Anna Tomova, Angelina Kosateva, Lyudmila Velkova, Aleksandar Dolashki
Publikováno v:
Pharmaceuticals, Vol 17, Iss 4, p 506 (2024)
Several biologically active compounds involved in the green synthesis of silver and gold nanoparticles have been isolated from snail mucus and characterized. This paper presents a successful method for the application of snail mucus from Cornu aspers
Externí odkaz:
https://doaj.org/article/115817c3d88842b18f3c6fc72e867982
Publikováno v:
Materials, Vol 16, Iss 20, p 6823 (2023)
The hydrogen sorption of materials based on 80 wt.% MgH2 with the addition of 15 wt.% Ni or V and 5 wt.% activated carbons synthesized from polyolefin wax, a waste product from polyethylene production (POW), walnut shells (CAN), and peach stones (CPS
Externí odkaz:
https://doaj.org/article/205028d9192b46e68b7c15233e088bbd
Autor:
Ivanka Stoycheva, Boyko Tsyntsarski, Bilyana Petrova, Georgi Georgiev, Temenuzhka Budinova, Nartzislav Petrov, Barbara Trzebicka, Slawomira Pusz, Bogumila Kumanek, Urszula Szeluga
Publikováno v:
Applied Sciences, Vol 12, Iss 4, p 2243 (2022)
Nanoporous carbon is synthesized on the base of phenol-formaldehyde resin and polyolefin wax, a by-product from industrial production of polyethylene at low pressure. The adsrption of phenol derivates from aqueous solutions on obtained carbon materia
Externí odkaz:
https://doaj.org/article/e5bc1bd69ac24ad2843147a4fa8431e9
Publikováno v:
Inorganics, Vol 8, Iss 2, p 12 (2020)
Magnesium-based materials are promising as hydrogen storage media due to their high theoretical hydrogen absorption capacity, abundance and low price. The subject of this study are the hydrogen sorption characteristics of the composites 80 wt % MgH2-
Externí odkaz:
https://doaj.org/article/f9c808d8f32f4ec4973e8c87d3fd231f
Autor:
Boyko Tsyntsarski, Ivanka Stoycheva, Georgi Georgiev, Nartzislav Petrov, Angelina Kosateva, Bilyana Petrova, Anna Bouzekova-Penkova, Tanya Tsoncheva, Gloria Issa
Publikováno v:
Proceedings of the Bulgarian Academy of Sciences. 75:1295-1302
Refuse-derived fuel (RDF) is a mixed industrial waste, which often contains combustible materials (cellulose, polymers, rubber, biomass, etc.). The RDF waste precursor is subjected to thermo-oxidation treatment at 300℃, followed by carbonizations a
Autor:
Ivanka Stoycheva, Boyko Tsyntsarski, Angelina Kosateva, Bilyana Petrova, Georgi Georgiev, Kalina Miteva
Publikováno v:
Proceedings of the Bulgarian Academy of Sciences. 75:216-222
Carbon foam is an advanced porous material with multiple high-technology applications, due to its cell structure, light weight, very good thermal and chemical stability, high thermal and electrical conductivity, as well as exceptional electromagnetic
Autor:
Kalina Miteva, Georgi Georgiev, Ivanka Stoycheva, Nartzislav Petrov, Bilyana Petrova, Andrei Sarbu, Boyko Tsyntsarski
Publikováno v:
Ecological Engineering and Environment Protection. 2021:34-37
Thermochemical conversion of lignocellulosic biomass is considered as a good opportunity to obtain liquid raw materials for biofuels and biochemicals. During this pyrolysis process a solid product, biocarbon, is obtained. Nowadays there is a growing
Autor:
Delia Patroi, Celina Maria Damian, Virgil Marinescu, Boyko Tsyntsarski, Ivanka Stoycheva, Anita Laura Chiriac, Simona Caprarescu, Teodor Sandu, Andrei Sârbu, Tanța Verona Iordache
Publikováno v:
Polymer International. 70:866-876
Autor:
Temenuzhka Budinova, Lenia Gonsalvesh, Ivan Banchev, Georgi Nikolov Georgiev, Nartzislav Petrov, B. Petrova, Miglena Vasileva, Ivanka Stoycheva, Vesislava B. Toteva, Radostin N. Nickolov, Boyko Tsyntsarski
Publikováno v:
Journal of Material Cycles and Waste Management. 22:1176-1183
A novel procedure for the conversion of waste algae waste, remaining from biodiesel production, into gas, liquid products and porous carbon has been developed. The precursor, algae waste is studied by thermogravimetric and differential thermal analys
Publikováno v:
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings.