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Liu M, Yuan L, Zhu C, Pan C, Gao Q, Wang H, Cheng Z, Epstein IR. Peptide-modulated pH rhythms. Chemphyschem 2022; 23:e202200103. [PMID: 35648769 DOI: 10.1002/cphc.202200103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 05/31/2022] [Indexed: 11/11/2022]
Abstract
Many drugs adjust and/or control the spatiotemporal dynamics of periodic processes such as heartbeat, neuronal signaling and metabolism, often by interacting with proteins or oligopeptides. Here we use a quasi-biocompatible, non-equilibrium pH oscillatory system as a biomimetic biological clock to study the effect of pH-responsive peptides on rhythm dynamics. The added peptides generate a feedback that can lengthen or shorten the oscillatory period during which the peptides alternate between random coil and coiled-coil conformations. This modulation of a chemical clock supports the notion that short peptide reagents may have utility as drugs to regulate human body clocks.
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Affiliation(s)
- Mengfei Liu
- China University of Mining and Technology, Chemical Engineering, CHINA
| | - Ling Yuan
- China University of Mining and Technology, Chemical Engineering, CHINA
| | - Chenghao Zhu
- China University of Mining and Technology, Chemical Engineering, CHINA
| | - Changwei Pan
- China University of Mining and Technology, Chemical Engineering, CHINA
| | - Qingyu Gao
- China University of Mining and Technology, Chemical Engineering, CHINA
| | - Hongzhang Wang
- China University of Mining and Technology, Chemical Engineering, CHINA
| | - Zhenfang Cheng
- China University of Mining and Technology, Chemical Engineering, CHINA
| | - Irving R Epstein
- Brandeis University, Chemistry Department, 415 South Street, MS 015, 02454, Waltham, UNITED STATES
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Niu H, Li Y, Yang X, Liu K, Li X, Ji L. Oscillation alternation in pH oscillator with additional feedback species. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Poros E, Kurin-Csörgei K, Szalai I, Rábai G, Orbán M. pH-oscillations in the bromate-sulfite reaction in semibatch and in gel-fed batch reactors. CHAOS (WOODBURY, N.Y.) 2015; 25:064602. [PMID: 26117127 DOI: 10.1063/1.4921176] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The simplest bromate oxidation based pH-oscillator, the two component BrO3(-)-SO3(2-) flow system was transformed to operate under semibatch and closed arrangements. The experimental preconditions of the pH-oscillations in semibatch configuration were predicted by model calculations. Using this information as guideline large amplitude (ΔpH∼3), long lasting (11-24 h) pH-oscillations accompanied with only a 20% increase of the volume in the reactor were measured when a mixture of Na2SO3 and H2SO4 was pumped into the solution of BrO3(-) with a very low rate. Batch-like pH-oscillations, similar in amplitude and period time appeared when the sulfite supply was substituted by its dissolution from a gel layer prepared previously in the reactor in presence of high concentration of Na2SO3. The dissolution vs time curve and the pH-oscillations in the semibatch and closed systems were successfully simulated. Due to the simplicity in composition and in experimental technique, the semibatch and batch-like BrO3(-)-SO3(2-) pH-oscillators may become superior to their CSTR (continuous flow stirred tank reactor) version in some present and future applications.
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Affiliation(s)
- Eszter Poros
- Department of Analytical Chemistry, Institute of Chemistry, L. Eötvös University, P.O. Box 32, H-1518 Budapest 112, Hungary
| | - Krisztina Kurin-Csörgei
- Department of Analytical Chemistry, Institute of Chemistry, L. Eötvös University, P.O. Box 32, H-1518 Budapest 112, Hungary
| | - István Szalai
- Department of Analytical Chemistry, Institute of Chemistry, L. Eötvös University, P.O. Box 32, H-1518 Budapest 112, Hungary
| | - Gyula Rábai
- Institute of Physical Chemistry, University of Debrecen, P.O. Box 7, H-4010 Debrecen, Hungary
| | - Miklós Orbán
- Department of Analytical Chemistry, Institute of Chemistry, L. Eötvös University, P.O. Box 32, H-1518 Budapest 112, Hungary
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Yuan L, Yang T, Liu Y, Hu Y, Zhao Y, Zheng J, Gao Q. pH Oscillations and Mechanistic Analysis in the Hydrogen Peroxide–Sulfite–Thiourea Reaction System. J Phys Chem A 2014; 118:2702-8. [DOI: 10.1021/jp500627z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ling Yuan
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
| | - Tao Yang
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
| | - Yang Liu
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
| | - Ying Hu
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
| | - Yuemin Zhao
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
| | - Juhua Zheng
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
| | - Qingyu Gao
- College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, P. R. China
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Gelens L, Beri S, Van der Sande G, Mezosi G, Sorel M, Danckaert J, Verschaffelt G. Exploring multistability in semiconductor ring lasers: theory and experiment. PHYSICAL REVIEW LETTERS 2009; 102:193904. [PMID: 19518954 DOI: 10.1103/physrevlett.102.193904] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Indexed: 05/27/2023]
Abstract
We report the first experimental observation of multistable states in a single-longitudinal mode semiconductor ring laser. We show how the operation of the device can be steered to either monostable, bistable, or multistable dynamical regimes in a controlled way. We observe that the dynamical regimes are organized in well-reproducible sequences that match the bifurcation diagrams of a two-dimensional model. By analyzing the phase space in this model, we predict how the stochastic transitions between multistable states take place and confirm it experimentally.
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Affiliation(s)
- L Gelens
- Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
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Self-organization in nonlinear dynamical systems and its relation to the materials science. J Solid State Electrochem 2008. [DOI: 10.1007/s10008-008-0554-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ohmori T, Yu W, Yamamoto T, Endo A, Nakaiwa M, Amemiya T, Yamaguchi T. On enzymatic pH oscillations in CSTR with outlet regulator. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.03.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jurczakowski R, Orlik M. Experimental and Theoretical Studies of the Multistability in the Electroreduction of the Nickel(II)−N3- Complexes at a Streaming Mercury Electrode. J Phys Chem B 2003. [DOI: 10.1021/jp0349482] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafał Jurczakowski
- Laboratory of Electroanalytical Chemistry, Department of Chemistry, University of Warsaw, ul. Pasteura 1, PL-02-093 Warsaw, Poland
| | - Marek Orlik
- Laboratory of Electroanalytical Chemistry, Department of Chemistry, University of Warsaw, ul. Pasteura 1, PL-02-093 Warsaw, Poland
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