Zobrazeno 1 - 10
of 168
pro vyhledávání: '"MARGARITA STOYTCHEVA"'
Autor:
Tanya Rivera-Martinez, Benjamín Valdez-Salas, Jorge Salvador-Carlos, Margarita Stoytcheva, Roumen Zlatev, Ernesto Beltrán-Partida
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 37, Iss 1 (2023)
The Coronavirus disease 2019 (COVID-19) outbreak increased the usage of hand rub disinfectants, resulting in skin damage. The World Health Organization (WHO) proposed hand rubs formulations incorporating glycerine due to its moisturizing effect; none
Externí odkaz:
https://doaj.org/article/bbc8e67cf0134d7d9489d3fe56db23fc
Autor:
Roumen Zlatev, Margarita Stoytcheva, Velizar Gochev, Zdravka Velkova, Benjamín Valdez, Gisela Montero
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 35, Iss 1, Pp 323-332 (2021)
A low-cost disposable lipase activity sensor was developed and characterized overcoming the main drawbacks of the already existing disposable ones: insufficient reproducibility to be applied for automatic lipase activity quantification and complicate
Externí odkaz:
https://doaj.org/article/3b74bb83613349d4989a9ffdb80dabef
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 35, Iss 1, Pp 953-963 (2021)
Pretreated waste Streptomyces fradiae biomass was used as biosorbent to remove tetracycline (TC) from model aqueous solutions. The biosorption study was conducted in a batch system to evaluate the impact of initial pH, biosorbent dosage, initial TC c
Externí odkaz:
https://doaj.org/article/b95204c84a6740f5a3db4d26db680161
Autor:
Kostadinka Todorova, Zdravka Velkova, Margarita Stoytcheva, Gergana Kirova, Sonia Kostadinova, Velizar Gochev
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 33, Iss 1, Pp 730-738 (2019)
Waste biomass from Bacillus cereus immobilized in sodium alginate and co-immobilized with activated carbon or with bentonite into alginate gel was studied for Pb(II), Cd(II) and Hg(II) removal from aqueous solutions. The composite biosorbent consisti
Externí odkaz:
https://doaj.org/article/f082b8d2076d4a4997d28c9ef274bad6
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 32, Iss 4, Pp 1065-1074 (2018)
In this work, a new approach for enzyme activity monitoring is suggested. It is based on the real-time imaging, by atomic force microscopy (AFM) and magnetic force microscopy (MFM), of the degradation of a nanoparticles-loaded enzyme responsive layer
Externí odkaz:
https://doaj.org/article/aa6563ce20cf4c2dae050d903fad4ba6
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 32, Iss 1, Pp 213-220 (2018)
An electrochemical organophosphorus hydrolase-based sensor for direct organophosphorus pesticides determination was developed, analytically characterized and applied for paraoxon quantification. The biosensing platform was constructed by one-step ele
Externí odkaz:
https://doaj.org/article/72176d4521f74ce9aa02ff124861902a
Publikováno v:
Journal of BioScience and Biotechnology, Vol 1, Iss 2, Pp 163-169 (2012)
The biosorption potential of chemically modified waste mycelium of industrial xylanase-producing strain Aspergillus awamori for Cu (II) removal from aqueous solutions was evaluated. The influence of pH, contact time and initial Cu (II) concentration
Externí odkaz:
https://doaj.org/article/02895b46a23a4b25ab321418e41f072a
Autor:
Benjamin Valdez-Salas, Ernesto Beltrán-Partida, Sandra Castillo-Uribe, Mario Curiel-Álvarez, Roumen Zlatev, Margarita Stoytcheva, Gisela Montero-Alpírez, Lidia Vargas-Osuna
Publikováno v:
Molecules, Vol 22, Iss 5, p 832 (2017)
It is imperative to understand and systematically compare the initial interactions between bacteria genre and surface properties. Thus, we fabricated a flat, anodized with 80 nm TiO2 nanotubes (NTs), and a rough Ti6Al4V surface. The materials were ch
Externí odkaz:
https://doaj.org/article/8bbef0217ede4e1fb6bff8d7410f0bec
Autor:
Rogelio Ramos, Roumen Zlatev, Benjamin Valdez, Margarita Stoytcheva, Mónica Carrillo, Juan-Francisco García
Publikováno v:
Journal of Analytical Methods in Chemistry, Vol 2013 (2013)
A virtual instrumentation (VI) system called VI localized corrosion image analyzer (LCIA) based on LabVIEW 2010 was developed allowing rapid automatic and subjective error-free determination of the pits number on large sized corroded specimens. The V
Externí odkaz:
https://doaj.org/article/c8fca273a96249049467c630ec179ee7
Autor:
Gisela Montero, Margarita Stoytcheva
The book'Biodiesel: Feedstocks and Processing Technologies'is intended to provide a professional look on the recent achievements and emerging trends in biodiesel production. It includes 22 chapters, organized in two sections. The first book section:'
