Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Boriana Zhekova"'
Publikováno v:
The Open Biotechnology Journal. 13:27-36
Background: Purification of enzymes by conventional methods such as precipitation and chromatographic techniques is a costly and time-consuming procedure and may lead to low yields of enzyme activity. Alternative liquid-liquid extraction methods such
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::add621686808095268ecfca035856ea5
https://doi.org/10.2174/1874070701913010027
https://doi.org/10.2174/1874070701913010027
Publikováno v:
The Open Biotechnology Journal. 12:189-203
Background: Rhizopus arrhizus is a potential microorganism for lipase production. Solid-state fermentation is used for microbial biosynthesis of enzymes, due to advantages, such as high productivity, utilization of abundant and low-cost raw materials
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60c94a84bed65e47b83c9cf977af2d18
https://doi.org/10.2174/1874070701812010189
https://doi.org/10.2174/1874070701812010189
Autor:
Valentina Dobreva, Albert Krastanov, Boriana Zhekova, Georgi Dobrev, Hristina Strinska, Pavlina Doykina
Publikováno v:
Biocatalysis and Agricultural Biotechnology. 4:77-82
The process of lipase biosynthesis by Aspergillus carbonarius in a submerged cultivation was studied. It was established that inclusion of a lipid carbon source in the nutrient medium significantly increased enzyme production. Highest lipase activity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe02eb173b34ed7251f8d5498d20c2fa
https://doi.org/10.1016/j.bcab.2014.09.011
https://doi.org/10.1016/j.bcab.2014.09.011
Autor:
Veselin Stanchev, Boriana Zhekova
Publikováno v:
Polish Journal of Microbiology. 60:113-118
The effect of the reaction conditions (substrate concentration, enzyme dosage, and pH) on cyclodextrin production by cyclodextrin glucanotransferase from Bacillus megaterium was investigated by applying mathematical modeling methods. Adequate models
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e00f042b604f38cb67f4e966f50e7893
https://doi.org/10.33073/pjm-2011-015
https://doi.org/10.33073/pjm-2011-015
Publikováno v:
Biotechnology & Biotechnological Equipment. 25:2295-2300
Some of the biochemical properties of a crude lipase enzyme from Rhizopus arrhizus were determined. The enzyme displayed maximal catalytic activity at pH 9.0 and temperature of 35°C. It was stable at basic values of pH and 40°C and in the presence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::156b966cf9ee182096fb002624010aa3
https://doi.org/10.5504/bbeq.2011.0003
https://doi.org/10.5504/bbeq.2011.0003
Publikováno v:
Polish Journal of Microbiology. 59:179-183
The composition of a synthetic culture medium for levorin biosynthesis by Streptomyces levoris 99/23 was optimised using mathematical modelling methods. The optimal concentrations of the medium components were established by means of an optimum compo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f11a6327c75dffe1a5900fb71b139a6a
https://doi.org/10.33073/pjm-2010-028
https://doi.org/10.33073/pjm-2010-028
Autor:
Georgi Dobrev, Boriana Zhekova, Nicola Tziporkov, Ivan Pishtiyski, Lidia Koleva, Ginka Delcheva
Publikováno v:
World Journal of Microbiology and Biotechnology. 25:2095-2102
An extracellular endoxylanase was isolated from the xylanolytic complex of Aspergillus niger B03. The enzyme was purified to a homogenous form using consecutive ultrafiltration and anion exchange chromatography. The endoxylanase was a monomer protein
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d845ff675f38365dca018e5262a9b008
https://doi.org/10.1007/s11274-009-0112-5
https://doi.org/10.1007/s11274-009-0112-5
Publikováno v:
World Journal of Microbiology and Biotechnology. 25:1043-1049
Two methods for increasing β-cyclodextrin yield, achieved with cyclodextrin glucanotransferase from Bacillus megaterium were investigated. A membrane process was performed, allowing a reuse of the enzyme. A process for simultaneous production and is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f85c771dfc0a30091324cf4329060d5
https://doi.org/10.1007/s11274-009-9985-6
https://doi.org/10.1007/s11274-009-9985-6
Publikováno v:
Applied Biochemistry and Biotechnology. 144:263-272
Cyclodextrin glucanotransferase, produced by Bacillus megaterium, was characterized, and the biochemical properties of the purified enzyme were determined. The substrate specificity of the enzyme was tested with different alpha-1,4-glucans. Cyclodext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09ee0a71f0487575fb477e6257e77037
https://doi.org/10.1007/s12010-007-8009-y
https://doi.org/10.1007/s12010-007-8009-y
Autor:
Boriana Zhekova, Ivan Pishtiyski
Publikováno v:
World Journal of Microbiology and Biotechnology. 22:109-114
Various kinds of substrates were tested for cyclodextrin production with cyclodextrin glucanotransferase (CGTase) from Bacillus megaterium. The enzyme formed cyclodextrin from different kinds of starch, dextrins, amylose, and amylopectin. However, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c00f322cfbd1cf5f6cb20e3d6130842
https://doi.org/10.1007/s11274-005-9004-5
https://doi.org/10.1007/s11274-005-9004-5