Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Velizar Gochev"'
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:
Ivan Iliev, Mariana Marhova, Sonya Kostadinova, Velizar Gochev, Marinela Tsankova, Angelina Ivanova, Galina Yahubyan, Vesselin Baev
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 33, Iss 1, Pp 1721-1732 (2019)
Microbial communities drive the biogeochemical cycles in wetlands and provide a number of ecosystem services. They underpin soil function, and are easily impacted by anthropogenic pressure. This study examined the bacterial microbiome in the natural
Externí odkaz:
https://doaj.org/article/20997cb436584f7eb50f287861a56bdb
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
Autor:
Galina Stefanova, Tanya Girova, Velizar Gochev, Magdalena Stoyanova, Zhana Petkova, Albena Stoyanova, Valtcho D. Zheljazkov
Publikováno v:
Heliyon, Vol 6, Iss 12, Pp e05491- (2020)
Laurel (Laurus nobilis L.) is a plant species from Lauraceae family, and is native to the Mediterranean region. The goal of this study was to compare chemical composition of laurel leaves and antibacterial activity of its essential oil (EO) from wild
Externí odkaz:
https://doaj.org/article/d8077e690e2240a2a6b5477c6f60f9cf
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
Autor:
ANDREY MARCHEV, IVAN IVANOV, PETKO DENEV, MILENA NIKOLOVA, VELIZAR GOCHEV, ALBENA STOYANOVA, ATANAS PAVLOV, VASIL GEORGIEV
Publikováno v:
Journal of BioScience and Biotechnology, Vol 4, Iss 2, Pp 219-229 (2015)
Chemical composition and bioactivity of essential oil from Salvia tomentosa Mill. natively grown in Bulgaria were investigated. GC-MS analysis identified 60 compounds which represented 98% of the oil constituents. The prevalent constituents were mono
Externí odkaz:
https://doaj.org/article/1079bf8b60914208a03c5167679629f1
Autor:
Vasil Georgiev, Anthony Ananga, Ivayla Dincheva, Ilian Badjakov, Velizar Gochev, Violeta Tsolova
Publikováno v:
Molecules, Vol 24, Iss 18, p 3355 (2019)
Essential oils and hydrosols of two cultivars of muscadine grapes (Muscadinia rotundifolia (Michx.) Small.) were obtained by hydro-distillation of flowers and berry skins. Twenty-three volatile compounds were identified in essential oils from the mus
Externí odkaz:
https://doaj.org/article/e81a8b5ae23c43d39f18280db4da2483
Autor:
Yana Hristova, Velizar Gochev, Juergen Wanner, Leopold Jirovetz, Erich Schmidt, Tania Girova, Andrei Kuzmanov
Publikováno v:
Journal of BioScience and Biotechnology, Vol 2, Iss 1, Pp 39-44 (2013)
The essential oil of Salvia sclarea L., growing in Bulgaria, was analyzed by gas chromatography – mass spectrometry. A total of 52 different compounds were identified, representing 98.25% of total oil content. Linalyl acetate (56.88%) and linalool
Externí odkaz:
https://doaj.org/article/1c477a0382bd48edace4a8dd41f2be17
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