Contact Info
Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf
Permittivity
Classification:
Permittivity
Citations 4
"Cell Permeabilization As A Tool For Measurement Of Intra-cellular Enzyme Activity In A Flow Injection System"
Anal. Chim. Acta
1991 Volume 248, Issue 2 Pages 371-378
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Gert Blankenstein and Maria-Regina KulaCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0381', 'label' => 'Permittivity', 'level1' => 'Permittivity', 'level2' => '', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '4', 'updated' => '0000-00-00 00:00:00', 'name' => 'Permittivity', 'nametotal' => 'Permittivity**4', 'first' => 'P' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '005415', 'authors' => 'Blankenstein, G.;Kula, M.R.', 'authorsweb' => 'Gert Blankenstein and Maria-Regina Kula', 'title' => 'Cell permeabilization as a tool for measurement of intra-cellular enzyme activity in a flow injection system', 'journal' => 'Anal. 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Use issue url', 'url' => '10.1021/ac00261a020', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Oscillometric flow cell for measurement of conductivity and permittivity', Anal. Chem., 1983 55(11) 1728-1731', 'firstchar' => 'O', 'twochars' => 'Os', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '008640', 'authors' => 'Breen, W.;Cassidy, J.F.;Lyons, M.E.G.', 'authorsweb' => 'William Breen, John F. Cassidy, and Michael E. G. Lyons', 'title' => 'Theoretical study of permselective layers on amperometric electrodes in flowing streams', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P02263', 'year' => '1991', 'volume' => '63', 'issue' => '20', 'startpage' => '2263', 'endpage' => '2268', 'type' => 'Journal Article', 'analytes' => '', 'matrices' => '', 'techniques' => ';0001;0381;', 'keywords' => ';0311;0314;', 'abstract' => 'The theoretical model is solved for Gaussian and Poisson concentration. profiles, both of which typically arise in FIA and HPLC. Analytical expressions for current and for concentration. profiles within the layer are derived. Working curves are presented that allow estimation of peak height increases, peak broadening, lag time and diffusionial tailing due to coating the amperometric detector with a permselective layer. The model can be used to design layers which minimize lag time and peak tailing and optimize peak height.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-11 18:36:31', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'Lyons, M.E.G.', 'address' => 'Department of Chemistry, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland', 'email' => 'NA', 'notes' => null, 'url' => '10.1021/ac00020a013', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Theoretical study of permselective layers on amperometric electrodes in flowing streams', Anal. 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Abstract:
Yeast cells (Candida boidinii) were incubated at 50°C for 5 min with 75 mM potassium phosphate buffer (pH 7.5) containing 0.5% digitonin, 0.5% Triton X-100 and 100 mM EDTA. The mixture was subjected to flow injection analysis with mixing with carrier solution and reagent solution (cf. Recktenwald et al. Enzyme Microb. Technol.., 1985, 7, 607). The mixture was subjected to dialysis and the NADH was detected fluorimetrically at 460 nm (excitation at 340 nm). The calibration graph was rectilinear for 0.01 to 3.0 iu mL-1 of NAD-dependent formate dehydrogenase.
Dialysis
Enzyme
Heated reaction
Triton X
Surfactant
"Oscillometric Flow Cell For Measurement Of Conductivity And Permittivity"
Anal. Chem.
1983 Volume 55, Issue 11 Pages 1728-1731
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Abstract:
A flow-through cell of concentric design with a body of PTFE (volume adjustable from 10 to 50 µL by altering the size of the electrodes), operating by the h.f. (42 MHz) conductance principle, is described (with diagrams); there is no galvanic contact between the electrodes (brass, coated with PTFE) and the solution being examined; as a result, the electrode surface layer is stable and measurements have good reproducibility.The calibration graph of conductivity vs. concentration. of aqueous KCl passing through the cell is rectilinear in the range 5 µM to 5 mM, and the signal is independent of flow rate (from 20 to 200 mL h-1).The cell has been applied in the determination of glucose by flow injection analysis (20 µL injection volume; water as carrier; amount detected ~100 ng of glucose).For permittivity measurements, the cell is calibrated with aqueous dioxan mixtures.
Glucose
Apparatus
Flowcell
"Theoretical Study Of Permselective Layers On Amperometric Electrodes In Flowing Streams"
Anal. Chem.
1991 Volume 63, Issue 20 Pages 2263-2268
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Lyons'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
The theoretical model is solved for Gaussian and Poisson concentration. profiles, both of which typically arise in FIA and HPLC. Analytical expressions for current and for concentration. profiles within the layer are derived. Working curves are presented that allow estimation of peak height increases, peak broadening, lag time and diffusionial tailing due to coating the amperometric detector with a permselective layer. The model can be used to design layers which minimize lag time and peak tailing and optimize peak height.
Peak analysis
Peak width
"Flow Analysis With Electrochemical Detection"
Anal. Proc.
1983 Volume 20, Issue 11 Pages 562-565
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Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1991V0248P00371', 'year' => '1991', 'volume' => '248', 'issue' => '2', 'startpage' => '371', 'endpage' => '378', 'type' => 'Journal Article', 'analytes' => '', 'matrices' => '', 'techniques' => ';0252;0381;', 'keywords' => ';0111;0147;0188;0468;0454;', 'abstract' => 'Yeast cells (Candida boidinii) were incubated at 50°C for 5 min with 75 mM potassium phosphate buffer (pH 7.5) containing 0.5% digitonin, 0.5% Triton X-100 and 100 mM EDTA. The mixture was subjected to flow injection analysis with mixing with carrier solution and reagent solution (cf. Recktenwald et al. Enzyme Microb. Technol.., 1985, 7, 607). The mixture was subjected to dialysis and the NADH was detected fluorimetrically at 460 nm (excitation at 340 nm). The calibration graph was rectilinear for 0.01 to 3.0 iu mL-1 of NAD-dependent formate dehydrogenase.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '2', 'urlcheck' => '2014-10-11 16:02:49', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01088', 'pauthor' => '!Kula, M.R.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84654-1', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Cell permeabilization as a tool for measurement of intra-cellular enzyme activity in a flow injection system', Anal. Chim. 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(42 MHz) conductance principle, is described (with diagrams); there is no galvanic contact between the electrodes (brass, coated with PTFE) and the solution being examined; as a result, the electrode surface layer is stable and measurements have good reproducibility.The calibration graph of conductivity vs. concentration. of aqueous KCl passing through the cell is rectilinear in the range 5 µM to 5 mM, and the signal is independent of flow rate (from 20 to 200 mL h-1).The cell has been applied in the determination of glucose by flow injection analysis (20 µL injection volume; water as carrier; amount detected ~100 ng of glucose).For permittivity measurements, the cell is calibrated with aqueous dioxan mixtures.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '3', 'urlcheck' => '2014-10-11 18:32:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00288', 'pauthor' => '!Pungor, E.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Not DOI assigned. 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T&oacute;th'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
Procedures developed in the authors' laboratory are discussed briefly. The construction of a flow-through micro-conductivity and permittivity detector cell is described. (12 references)
Review
Apparatus