title: Effect of different modifications of BEA-zeolites on operational characteristics of conductometric biosensor.
abstract: Effect of different modifications of zeolite Na(+)-BEA on working characteristics of urease-based conductometric biosensor was studied. As the biosensor sensitive elements were used bioselective membranes based on urease and various zeolites immobilised with bovine serum albumin on the surface of conductometric transducers. Influence of zeolites on sensitivity of urea biosensor was investigated as well as reproducibility of biosensor signal and reproducibility of activity of the bioselective element after different variants of urease immobilisation on the surface of conductometric transducer. The biosensors based on zeolites (NH4(+)-BEA 30 and H(+)-BEA 30) were shown to be the most sensitive. Concentration of these zeolites in the bioselective membrane was optimized. Use of zeolites modified with methyl viologen and silver was ascertained to be of no prospect for urea conductometric biosensors. It was demonstrated that characteristics of urea biosensors can be regulated, varying zeolites modifications and their concentrations in bioselective membranes.
authors.affiliation: Laboratory of Biomolecular Electronics, Institute of Molecular Biology and Genetics of National Academy of Sciences of Ukraine, Zabolotnogo Street 150, 03143 Kyiv, Ukraine; Institute of Biology, Taras Shevchenko National University of Kyiv, Volodymyrska Street 64, 01601 Kyiv, Ukraine.
authors.forename: I S
authors.initials: IS
authors.lastname: Kucherenko
authors.affiliation: Laboratory of Biomolecular Electronics, Institute of Molecular Biology and Genetics of National Academy of Sciences of Ukraine, Zabolotnogo Street 150, 03143 Kyiv, Ukraine.
authors.forename: Capital O Cyrillic О
authors.initials: CO
authors.lastname: Soldatkin
authors.affiliation: Micro and Nanotechnology Department, Middle East Technical University, Ankara, 06531, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Soy
authors.affiliation: Micro and Nanotechnology Department, Middle East Technical University, Ankara, 06531, Turkey.
authors.forename: K
authors.initials: K
authors.lastname: Kirdeciler
authors.affiliation: Micro and Nanotechnology Department, Middle East Technical University, Ankara, 06531, Turkey; Central Laboratory, Middle East Technical University, Ankara, 06531, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Öztürk
authors.affiliation: Micro and Nanotechnology Department, Middle East Technical University, Ankara, 06531, Turkey; Central Laboratory, Middle East Technical University, Ankara, 06531, Turkey.
authors.forename: B
authors.initials: B
authors.lastname: Akata
authors.affiliation: Laboratoire des Sciences Analytiques, Université Claude Bernard Lyon 1, F69622 Villeurbanne Cedex, France.
authors.forename: N
authors.initials: N
authors.lastname: Jaffrezic-Renault
authors.affiliation: Laboratory of Biomolecular Electronics, Institute of Molecular Biology and Genetics of National Academy of Sciences of Ukraine, Zabolotnogo Street 150, 03143 Kyiv, Ukraine; Institute of High Technologies, Taras Shevchenko National University of Kyiv, Volodymyrska Street 64, 01601 Kyiv, Ukraine.
authors.forename: A P
authors.initials: AP
authors.lastname: Soldatkin
authors.affiliation: Laboratory of Biomolecular Electronics, Institute of Molecular Biology and Genetics of National Academy of Sciences of Ukraine, Zabolotnogo Street 150, 03143 Kyiv, Ukraine; Institute of High Technologies, Taras Shevchenko National University of Kyiv, Volodymyrska Street 64, 01601 Kyiv, Ukraine.
authors.forename: S V
authors.initials: SV
authors.lastname: Dzyadevych
mesh_terms: D015374:Biosensing Techniques; D003217:Conductometry / Q000379:methods; D010269:Paraquat / Q000737:chemistry; D012710:Serum Albumin, Bovine / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D014508:Urea / Q000737:chemistry; D014510:Urease / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry*
chemical_list: D017641:Zeolites; D012710:Serum Albumin, Bovine; D012834:Silver; D014508:Urea; D014510:Urease; D010269:Paraquat