TY - JOUR AU - Koncz, Viktória Anna AU - Noszticzius, Zoltán AU - Kály-Kullai, Kristóf TI - Transient Response of the Acid-base Diode for Polarity Change JF - PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING J2 - PERIOD POLYTECH CHEM ENG VL - 65 PY - 2021 IS - 4 SP - 559 EP - 566 PG - 8 SN - 0324-5853 DO - 10.3311/PPch.17821 UR - https://m2.mtmt.hu/api/publication/32233692 ID - 32233692 N1 - Export Date: 15 June 2022 Correspondence Address: Koncz, V.; Department of Physics, P. O. B. 91, Hungary; email: viki.koncz@gmail.com Funding details: Hungarian Scientific Research Fund, OTKA, K131425 Funding text 1: This work was partially supported by OTKA Grant K131425. AB - An application of the so-called acid-base diode would be the sensitive detection of nonhydrogen cations in an acidic medium based on salt-effects. For diode purposes different connecting elements between the acidic and aqueous reservoirs of the diode were developed, namely a polyvinyl alcohol (PVA) hydrogel cylinder, and a polyvinyl butyral (PVB) membrane. During the measurement of the voltage – current characteristic (VCC) of the diode, it was found, that in the case of PVA gel cylinder an overshoot (a local maximum followed by a local minimum) appeared in the time vs. current curve, while the diode was switched between modes (open or closed), that is the direction of the applied voltage was reversed. The overshoot did not appear in PVB membrane. The existence of overshoots was studied by numerical simulations. The time response of the diode with different hypothetic connecting elements was investigated, when the diode was switched between modes via changing the polarity of applied voltage. We found that larger diffusion coefficients of hydrogen and hydroxide ions explain the appearance of overshoots. By examining the concentration and potential profiles a qualitative explanation of this phenomenon was given. LA - English DB - MTMT ER - TY - JOUR AU - Koncz, Viktória Anna AU - Izsák, Ferenc AU - Noszticzius, Zoltán AU - Kály-Kullai, Kristóf TI - Adaptive moving mesh algorithm based on local reaction rate JF - HELIYON J2 - HELIYON VL - 7 PY - 2021 IS - 1 SN - 2405-8440 DO - 10.1016/j.heliyon.2020.e05842 UR - https://m2.mtmt.hu/api/publication/31824257 ID - 31824257 N1 - Department of Physics, Budapest University of Technology and Economics, Budapest, 1521, Hungary Department of Applied Analysis and Computational Mathematics, MTA ELTE NumNet Research Group, Eötvös University, Budapest, 1518, Hungary Export Date: 13 May 2021 Correspondence Address: Koncz, V.; Department of Physics, Hungary; email: viki.koncz@gmail.com Department of Physics, Budapest University of Technology and Economics, Budapest, 1521, Hungary Department of Applied Analysis and Computational Mathematics, MTA ELTE NumNet Research Group, Eötvös University, Budapest, 1518, Hungary Export Date: 17 May 2021 Correspondence Address: Koncz, V.; Department of Physics, Hungary; email: viki.koncz@gmail.com Department of Physics, Budapest University of Technology and Economics, Budapest, 1521, Hungary Department of Applied Analysis and Computational Mathematics, MTA ELTE NumNet Research Group, Eötvös University, Budapest, 1518, Hungary Export Date: 9 June 2021 Correspondence Address: Koncz, V.; Department of Physics, Hungary; email: viki.koncz@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Palócz, Orsolya AU - Noszticzius, Zoltán AU - Kály-Kullai, Kristóf AU - Bradley, Emma AU - Csikó, György TI - In vitro study of chlorine dioxide on porcine intestinal epithelial cell gene markers JF - VETERINARY MEDICINE AND SCIENCE J2 - VET MED SCI VL - 8 PY - 2021 IS - 2 SP - 591 EP - 597 PG - 7 SN - 2053-1095 DO - 10.1002/vms3.658 UR - https://m2.mtmt.hu/api/publication/32463610 ID - 32463610 AB - Background: Chlorine dioxide (ClO2) is an inorganic, potent biocide and is available in highly purified aqueous solution. It can be administered as an oral antiseptic in this form. Objectives: Our aim is to determine the level of inflammatory markers and cytochrome genes expressed by enterocytes exposed to different concentrations of hyperpure chlorine dioxide solution. Methods: Porcine jejunal enterocyte cell (IPEC-J2) cultures were treated with the aqueous solution of hyper-pure chlorine dioxide of various concentrations. We determined the alterations in mRNA levels of inflammatory mediators, such as IL6, CXCL8/IL8, TNF, HSPA6 (Hsp70), CAT and PTGS2 (COX2); furthermore, the expression of three cytochrome genes (CYP1A1, CYP1A2, CYP3A29) were analysed by quantitative PCR method. Results: The highest applied ClO2 concentration reduced the expression of all three investigated CYP genes. The gene expression of PTGS2 and CAT were not altered by most concentrations of ClO2. The expression of IL8 gene was reduced by all applied concentrations of ClO2. TNF mRNA level was also decreased by most ClO2 concentrations used. Conclusions: Different concentrations of chlorine dioxide exhibited immunomodulatory activity and caused altered transcription of CYP450 genes in porcine enterocytes. Further studies are needed to determine the appropriate ClO2 concentration for oral use in animals. LA - English DB - MTMT ER - TY - JOUR AU - Kály-Kullai, Kristóf AU - Gyökérné Wittmann, Mária AU - Noszticzius, Zoltán AU - Rosivall, László TI - Can chlorine dioxide prevent the spreading of coronavirus or other viral infections? Medical hypotheses JF - PHYSIOLOGY INTERNATIONAL J2 - PHYSIOL INT VL - 107 PY - 2020 IS - 1 SP - 1 EP - 11 PG - 11 SN - 2498-602X DO - 10.1556/2060.2020.00015 UR - https://m2.mtmt.hu/api/publication/31304529 ID - 31304529 N1 - Department of Physics, Group of Chemical Physics, Budapest University of Technology and Economics, Budapest, Hungary Institute of Translational Medicine, International Nephrology Research and Training Center, Semmelweis University, Budapest, Hungary Cited By :3 Export Date: 2 March 2021 Correspondence Address: Rosivall, L.; Institute of Translational Medicine, Nagyvárad tér 4., Hungary; email: rosivall.laszlo@med.semmelweis-univ.hu Chemicals/CAS: chlorine dioxide, 10049-04-4; cysteine, 4371-52-2, 52-89-1, 52-90-4; glutathione, 70-18-8; hemagglutinin, 37333-12-3; nitrogen dioxide, 10102-44-0; ozone, 10028-15-6; tryptophan, 6912-86-3, 73-22-3; tyrosine, 16870-43-2, 55520-40-6, 60-18-4; oxide, 16833-27-5; Antiviral Agents; Chlorine Compounds; chlorine dioxide; Disinfectants; Oxides; Pharmaceutical Solutions Department of Physics, Group of Chemical Physics, Budapest University of Technology and Economics, Budapest, Hungary Institute of Translational Medicine, International Nephrology Research and Training Center, Semmelweis University, Budapest, Hungary Cited By :4 Export Date: 9 June 2021 Correspondence Address: Rosivall, L.; Institute of Translational Medicine, Nagyvárad tér 4., Hungary; email: rosivall.laszlo@med.semmelweis-univ.hu LA - English DB - MTMT ER - TY - JOUR AU - Koncz, Viktória Anna AU - Roszol, László AU - Noszticzius, Zoltán AU - Kály-Kullai, Kristóf TI - Numerical modeling of salt effects in weak acid–weak base diodes JF - JOURNAL OF ELECTROANALYTICAL CHEMISTRY J2 - J ELECTROANAL CHEM VL - 834 PY - 2019 SP - 101 EP - 113 PG - 13 SN - 1572-6657 DO - 10.1016/j.jelechem.2018.12.020 UR - https://m2.mtmt.hu/api/publication/30430108 ID - 30430108 N1 - Export Date: 9 June 2021 CODEN: JECHE Correspondence Address: Koncz, V.; Department of Physics, Hungary; email: viki.koncz@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Schmitz, G AU - Noszticzius, Zoltán AU - Holló, Gábor AU - Gyökérné Wittmann, Mária AU - Furrow, SD TI - Reactions of iodate with iodine in concentrated sulfuric acid. Formation of I(+3) and I(+1) compounds JF - CHEMICAL PHYSICS LETTERS J2 - CHEM PHYS LETT VL - 691 PY - 2018 SP - 44 EP - 50 PG - 7 SN - 0009-2614 DO - 10.1016/j.cplett.2017.10.055 UR - https://m2.mtmt.hu/api/publication/3392676 ID - 3392676 N1 - Ecole Polytechnique, Université Libre de Bruxelles, CP165/63, Av. F. Roosevelt 50Brussels 1050, Belgium Department of Physics, Budapest University of Technology and Economics, Budapest, H-1521, Hungary Penn State Berks College, The Pennsylvania State University, ReadingPA 19610, United States Cited By :3 Export Date: 13 May 2021 CODEN: CHPLB Correspondence Address: Schmitz, G.; Ecole Polytechnique, Av. F. Roosevelt 50, Belgium; email: gschmitz@ulb.ac.be AB - The absorption spectra in a large range of concentrations show that the reactions of iodate with iodine in 96% sulfuric acid produce (IO) HSO4, I-3(+) and I-5(+), just like in the pure 100% acid. We discovered that, in 96% H2SO4, these reactions also produce I2O which is not formed in the pure acid. I2O is an important intermediate of reactions in diluted sulfuric acid, including the Bray-Liebhafsky reaction, but it had never been observed directly because of its very high reactivity. The equilibrium constants of the reactions producing these four compounds were determined. (C) 2017 Elsevier B.V. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Holló, Gábor AU - Kály-Kullai, Kristóf AU - Lawson, Thuy B AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Muntean, Norbert AU - Furrow, Stanley D AU - Schmitz, Guy TI - Platinum as a HOI/I2 Redox Electrode and Its Mixed Potential in the Oscillatory Briggs−Rauscher Reaction JF - JOURNAL OF PHYSICAL CHEMISTRY A J2 - J PHYS CHEM A VL - 121 PY - 2017 IS - 2 SP - 429 EP - 439 PG - 11 SN - 1089-5639 DO - 10.1021/acs.jpca.6b10243 UR - https://m2.mtmt.hu/api/publication/3184605 ID - 3184605 N1 - Department of Physics, Budapest University of Technology and Economics, Budapest, H-1521, Hungary Department of Physical Chemistry, Babes-Bolyai University, Cluj-Napoca, RO-400028, Romania Penn State Berks College, Pennsylvania State University, Reading, Pennsylvania, 19610, United States Faculty of Applied Sciences, Universite Libre de Bruxelles, CP165/63, Av. F. Roosevelt 50, Brussels, 1050, Belgium Cited By :4 Export Date: 13 May 2021 CODEN: JPCAF Correspondence Address: Wittmann, M.; Department of Physics, Hungary; email: wittmann@eik.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Noszticzius, Zoltán AU - Bezur, László AU - Gerencsér, Ákos AU - Holló, Gábor AU - Kály-Kullai, Kristóf AU - Lawson, Thuy AU - Megyesi, Marianna AU - Varga, Bozsana AU - Gyökérné Wittmann, Mária TI - Hogyan ellenőrizhető egy ismeretlen klór-dioxid termék tisztasága? JF - MAGYAR FOGORVOS: A MAGYAR ORVOSI KAMARA FOGORVOSI TAGOZATÁNAK LAPJA J2 - MAGYAR FOGORVOS VL - 2017 PY - 2017 IS - 3 SP - 132 EP - 137 PG - 6 SN - 1216-2213 UR - https://m2.mtmt.hu/api/publication/3309625 ID - 3309625 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Koncz, Viktória Anna AU - Noszticzius, Zoltán AU - Roszol, László AU - Kály-Kullai, Kristóf TI - Time-Dependent Modeling of Salt-Contaminated Acid-Base Diodes JF - JOURNAL OF THE ELECTROCHEMICAL SOCIETY J2 - J ELECTROCHEM SOC VL - 164 PY - 2017 IS - 4 SP - H257 EP - H265 SN - 0013-4651 DO - 10.1149/2.1701704jes UR - https://m2.mtmt.hu/api/publication/3207037 ID - 3207037 N1 - Cited By :2 Export Date: 17 May 2021 CODEN: JESOA Cited By :2 Export Date: 9 June 2021 CODEN: JESOA LA - English DB - MTMT ER - TY - JOUR AU - Holló, Gábor AU - Kály-Kullai, Kristóf AU - Lawson, Thuy B AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Muntean, Norbert AU - Furrow, Stanley D AU - Schmitz, Guy TI - HOI versus HOIO Selectivity of a Molten-type AgI Electrode JF - JOURNAL OF PHYSICAL CHEMISTRY A J2 - J PHYS CHEM A VL - 118 PY - 2014 IS - 26 SP - 4670 EP - 4679 PG - 10 SN - 1089-5639 DO - 10.1021/jp504052w UR - https://m2.mtmt.hu/api/publication/2743898 ID - 2743898 N1 - Department of Physics, Budapest University of Technology and Economics, H-1521 Budapest, Hungary Department of Physical Chemistry, Babes-Bolyai University, RO-400028 Cluj-Napoca, Romania Penn State Berks College, Pennsylvania State University, Reading, PA 19610, United States Faculty of Applied Sciences, Université Libre de Bruxelles, CP165/63, Av. F. Roosevelt 50, 1050 Brussels, Belgium Cited By :5 Export Date: 17 May 2021 CODEN: JPCAF Correspondence Address: Wittmann, M.; Department of Physics, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; email: wittmann@eik.bme.hu LA - English DB - MTMT ER - TY - PAT AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Kály-Kullai, Kristóf AU - Megyesi, M AU - Volford, A TI - Permeation method and apparatus for preparing fluids containing high purity chlorine dioxide PY - 2013 UR - https://m2.mtmt.hu/api/publication/2803233 ID - 2803233 LA - Chinese DB - MTMT ER - TY - PAT AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Kály-Kullai, Kristóf AU - Megyesi, M AU - Volford, A TI - Permeation method and apparatus for preparing fluids containing high purity chlorine dioxide PY - 2013 UR - https://m2.mtmt.hu/api/publication/2803231 ID - 2803231 LA - English DB - MTMT ER - TY - JOUR AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Kály-Kullai, Kristóf AU - Beregvari, Z AU - Kiss, István AU - Rosivall, László AU - Szegedi, J TI - Chlorine Dioxide Is a Size-Selective Antimicrobial Agent JF - PLOS ONE J2 - PLOS ONE VL - 8 PY - 2013 IS - 11 PG - 10 SN - 1932-6203 DO - 10.1371/journal.pone.0079157 UR - https://m2.mtmt.hu/api/publication/2499103 ID - 2499103 AB - Background / Aims: ClO2, the so-called "ideal biocide", could also be applied as an antiseptic if it was understood why the solution killing microbes rapidly does not cause any harm to humans or to animals. Our aim was to find the source of that selectivity by studying its reaction-diffusion mechanism both theoretically and experimentally. Methods: ClO2 permeation measurements through protein membranes were performed and the time delay of ClO2 transport due to reaction and diffusion was determined. To calculate ClO2 penetration depths and estimate bacterial killing times, approximate solutions of the reaction-diffusion equation were derived. In these calculations evaporation rates of ClO2 were also measured and taken into account. Results: The rate law of the reaction-diffusion model predicts that the killing time is proportional to the square of the characteristic size (e. g. diameter) of a body, thus, small ones will be killed extremely fast. For example, the killing time for a bacterium is on the order of milliseconds in a 300 ppm ClO2 solution. Thus, a few minutes of contact time (limited by the volatility of ClO2) is quite enough to kill all bacteria, but short enough to keep ClO2 penetration into the living tissues of a greater organism safely below 0.1 mm, minimizing cytotoxic effects when applying it as an antiseptic. Additional properties of ClO2, advantageous for an antiseptic, are also discussed. Most importantly, that bacteria are not able to develop resistance against ClO2 as it reacts with biological thiols which play a vital role in all living organisms. Conclusion: Selectivity of ClO2 between humans and bacteria is based not on their different biochemistry, but on their different size. We hope initiating clinical applications of this promising local antiseptic. LA - English DB - MTMT ER - TY - GEN AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Kály-Kullai, Kristóf AU - Zoltán, Beregvári AU - István, Kiss AU - Rosivall, László AU - János, Szegedi ED - arXiv, org TI - Demonstrating that chlorine dioxide is a size-selective antimicrobial agent and high purity ClO2 can be used as a local antiseptic PY - 2013 PG - 32 UR - https://m2.mtmt.hu/api/publication/2777271 ID - 2777271 AB - Background / Aims ClO2, the so-called “ideal biocide”, could also be applied as an antiseptic if it was understood why the solution’s rapid killing of microbes does not cause any harm to humans or to animals. Our aim was to study both theoretically and experim entally its reaction-diffusion mechanism to find the source of that selectivity. Methods ClO2 permeation measurements through protein membranes were performed and the time delay of ClO2 transport due to reaction and diffusion was determined. To calculate ClO2 penetration depths and estimate bacterial killing times, approximate solutions of the reaction-diffusion equation were derived. Additionally, as a preliminary test, three patients with infected wounds were treated with a 300 ppm high purity ClO 2 solution and the healing process was documented. Results The rate law of the reaction-diffusion model predicts that the killing time is proportional to the square of the characteristic size (e.g. diameter) of a body, thus, small ones will be killed extremely fast. For example, the killing time for a bacterium is on the order of milliseconds in a 300 ppm ClO 2 solution. Thus, the few minutes of contact time (owing to the volatility of ClO2) is quite enough to kill all bacteria, but short enough to keep ClO2 penetration into the living tissues safely below 0.1 mm, minimizing cytotoxic effects. Pictures of successful wound healings confirm these considerations. Various properties of ClO2, advantageous for an antiseptic, are also discussed. Most importantly, bacteria are not able to develop resistance against ClO2 as it reacts with biological thiols which play a vital role in a ll living organisms. Conclusion Selectivity of ClO2 between humans and bacteria is based not on their different biochemistry, but on their different size. Preliminary clinical results encourage further research with this promising local antiseptic. LA - English DB - MTMT ER - TY - JOUR AU - Muntean, Norbert AU - Lawson Bich, Thuy AU - Kály-Kullai, Kristóf AU - Gyökérné Wittmann, Mária AU - Noszticzius, Zoltán AU - Onel, L AU - Furrow, SD TI - Measurement of Hypoiodous Acid Concentration by a Novel Type Iodide Selective Electrode and a New Method To Prepare HOI. Monitoring HOI Levels in the Briggs-Rauscher Oscillatory Reaction JF - JOURNAL OF PHYSICAL CHEMISTRY A J2 - J PHYS CHEM A VL - 116 PY - 2012 IS - 25 SP - 6630 EP - 6642 PG - 13 SN - 1089-5639 DO - 10.1021/jp3015673 UR - https://m2.mtmt.hu/api/publication/2210869 ID - 2210869 N1 - Department of Physical Chemistry, Babes-Bolyai University, RO-400028 Cluj-Napoca, Romania Department of Physics, Budapest University of Technology and Economics, H-1521 Budapest, Hungary School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom Penn State Berks College, Pennsylvania State University, Reading, PA 19610, United States Cited By :8 Export Date: 17 May 2021 CODEN: JPCAF Correspondence Address: Wittmann, M.; Department of Physics, , H-1521 Budapest, Hungary; email: wittmann@eik.bme.hu AB - A new type of iodide selective electrode prepared by dipping a silver wire into molten silver iodide is reported. The electrode was calibrated for silver and iodide ions and the measured electromotive force for various Ag+ and I- concentrations was close to the theoretical within a few millivolts. Besides Ag+ and I- ions, however, the electrode also responds to hypoiodous acid. Thus, the electrode was calibrated for HOT as well, and for that purpose a new method of hypoiodous acid preparation was developed. To explain the close to Nemstian electrode response for HOI and also the effect of hydrogen ion and iodine concentration on that response, the corrosion potential theory suggested earlier by Noszticzius et al. was modified and developed further. Following oscillations in the Briggs-Rauscher reaction with the new electrode the potential crosses the "solubility limit potential" (SLP) of silver iodide. Potentials below SLP are controlled by the concentration of I-, but potentials above SLP are corrosion potentials determined by the concentration of HOI. Finally, the measured HOI oscillations are compared with calculated ones simulated by a model by Furrow et al. LA - English DB - MTMT ER - TY - PAT AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Kály-Kullai, Kristóf AU - Megyesi, M AU - Volford, A TI - Permeation method and apparatus for preparing fluids containing high purity chlorine dioxide CY - Country:10001(1) PY - 2012 UR - https://m2.mtmt.hu/api/publication/2803189 ID - 2803189 N1 - #hozzárendelt szerző nem található: Noszticzius Z LA - English DB - MTMT ER - TY - JOUR AU - Muntean, Norbert AU - Baldea, I AU - Szabó, Gabriella Stefánia AU - Noszticzius, Zoltán TI - Antioxidant capacity determination by the Briggs-Rauscher oscillating reaction in a flow system. An application of functional dynamics in analytical chemistry JF - STUDIA UNIVERSITATIS BABES-BOLYAI CHEMIA J2 - STUD UNIV BABES-BOLYAI CHEM VL - 55 PY - 2010 IS - 1 SP - 121 EP - 132 PG - 12 SN - 1224-7154 UR - https://m2.mtmt.hu/api/publication/1401920 ID - 1401920 LA - English DB - MTMT ER - TY - JOUR AU - Noszticzius, Zoltán AU - Rosivall, László AU - Gyökérné Wittmann, Mária TI - Univerzális fegyver a mikrobák ellen? A hipertiszta klór-dioxid JF - TERMÉSZET VILÁGA J2 - TERMÉSZET VILÁGA VL - 141 PY - 2010 IS - 4 SP - 154 EP - 157 PG - 4 SN - 0040-3717 UR - https://m2.mtmt.hu/api/publication/1401921 ID - 1401921 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Roszol, László AU - Lawson Bich, Thuy AU - Koncz, Viktória Anna AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária AU - Sarkadi, Tamás AU - Koppa, Pál TI - Micropatterned Polyvinyl Butyral Membrane for Acid-Base Diodes JF - JOURNAL OF PHYSICAL CHEMISTRY B J2 - J PHYS CHEM B VL - 114 PY - 2010 IS - 43 SP - 13718 EP - 13725 PG - 8 SN - 1520-6106 DO - 10.1021/jp106773y UR - https://m2.mtmt.hu/api/publication/1401797 ID - 1401797 N1 - Department of Physics, Budapest University of Technology and Economics, 1521 Budapest, Hungary Department of Atomic Physics, Budapest University of Technology and Economics, 1521 Budapest, Hungary Cited By :12 Export Date: 17 May 2021 CODEN: JPCBF Correspondence Address: Wittmann, M.; Department of Physics, Budapest University of Technology and Economics, 1521 Budapest, Hungary; email: wittmann@eik.bme.hu Department of Physics, Budapest University of Technology and Economics, 1521 Budapest, Hungary Department of Atomic Physics, Budapest University of Technology and Economics, 1521 Budapest, Hungary Cited By :12 Export Date: 9 June 2021 CODEN: JPCBF Correspondence Address: Wittmann, M.; Department of Physics, Budapest University of Technology and Economics, 1521 Budapest, Hungary; email: wittmann@eik.bme.hu AB - Until now, polyvinyl alcohol (PVA) gel cylinders have been used in electrolyte diodes as a connecting element between the acidic and alkaline reservoirs. In this paper, a new connecting element is reported: a breath figure templated polyvinyl butyral (PVB) membrane prepared with dip-coating from a dichloromethane solution of the polymer in a humid atmosphere. The procedure gives a 1.5-2 mu m thick membrane with a hexagonal pattern, the average characteristic length of which is 1 mu m. After an acidic etching, it was found to be a good connecting element. The voltage-current characteristics and dynamic properties of PVA and PVB were measured and compared. The PVB membrane has a faster response to voltage changes than the PVA gel, but in both cases, there was a slow drift in the current that prevented it from reaching a steady state. Reproducible characteristics can be obtained, however, after the current reaches a well-defined quasi-steady state. LA - English DB - MTMT ER - TY - JOUR AU - Roszol, László AU - Várnai, A AU - Lorántfy, B AU - Noszticzius, Zoltán AU - Gyökérné Wittmann, Mária TI - Negative salt effect in an acid-base diode: Simulations and experiments JF - JOURNAL OF CHEMICAL PHYSICS J2 - J CHEM PHYS VL - 132 PY - 2010 IS - 6 PG - 9 SN - 0021-9606 DO - 10.1063/1.3292001 UR - https://m2.mtmt.hu/api/publication/1315743 ID - 1315743 N1 - Cited By :9 Export Date: 17 May 2021 CODEN: JCPSA Correspondence Address: Roszol, L.; Department of Physics, , 1521 Budapest, Hungary; email: roszoll@gmail.com Cited By :9 Export Date: 9 June 2021 CODEN: JCPSA Correspondence Address: Roszol, L.; Department of Physics, , 1521 Budapest, Hungary; email: roszoll@gmail.com AB - The paper describes a new phenomenon discovered in the electrolytic analog of a semiconductor diode. As an example, the phenomenon is studied in the 0.1M KOH–0.1M HCl diode where the alkaline and the acidic reservoirs are connected by a hydrogel cylinder. First the traditional, so-called positive salt effect is discussed. In that case some salt is added to the alkaline reservoir of a reverse biased electrolyte diode and as a result, close to a critical concentration of the added salt the electric current increases sharply. The so-called negative salt effect appears as a suppression of the positive one. It is shown by numerical simulations, by approximate analytical formulae, and also by experiments that the high current caused by the salt contamination in the alkaline reservoir can be mostly suppressed by relatively small salt concentrations in the acidic reservoir. Thus a straightforward application of the negative salt effect would be the sensitive detection of nonhydrogen cations in an acidic medium (eg., in ion chromatography) LA - English DB - MTMT ER -