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  1. Proceedings of the National Academy of Sciences, India Section A: Physical Sciences
  2. Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 84
  3. Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 84, Issue 1, March 2014
  4. Synergetic Effect of Thiolacids on the Oxidation of Thiourea by Methylene Blue in Acidic Medium
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Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 87
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 86
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 85
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 84
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 84, Issue 4, December 2014
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 84, Issue 3, September 2014
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 84, Issue 2, June 2014
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 84, Issue 1, March 2014
Cucurbituril-Induced Supramolecular pK $_{a}$ Shift in Fluorescent Dyes and Its Prospective Applications
Thermal and Crystallographic Studies of 1-(2-Fluoro-4-Nitrophenyl)-4-(Prop-2-yn-1-yl)Piperazine Single Crystal
Quantitative Spectrophotometric Determination of Propranolol Hydrochloride in Pharmaceuticals Using Cerium(IV) Sulphate as Oxidimetric Reagent
Synergetic Effect of Thiolacids on the Oxidation of Thiourea by Methylene Blue in Acidic Medium
Partial Molar Volume, Partial Molar Adiabatic Compressibility and Viscosity Coefficient of Aqueous Solution of Metal(II) Chelates of Ethylenediaminetetraacetic Acid
Mixed Convection with Thermal Radiation in a Vertical Pipe with Partially Heated or Cooled Wall
Homotopy Perturbation Method (HPM) Solution for Flow of a Conducting Visco-elastic Fluid Through a Porous Medium
Soret and Hall Effect on Heat and Mass Transfer in MHD Free Convective Flow Through a Porous Medium in a Vertical Porous Channel
Two-Dimensional Approximation of Piezoelectric Shallow Shells with Variable Thickness
Nonlinear Oscillator: Controlled and Uncontrolled Vibrations
A Study on the Interacting Ricci Dark Energy in f(R, T) Gravity
Delineation of Natural and Anthropogenic Process Controlling Hydrogeochemistry of Layered Aquifer Sequence
Erratum to: Justification of Koiter’s Shell Model Using Gamma Convergence
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 83
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences : Volume 82

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Synergetic Effect of Thiolacids on the Oxidation of Thiourea by Methylene Blue in Acidic Medium

Content Provider Springer Nature Link
Author Dwivedi, Upasana Sharma, R. Mishra, K. K. Chaturvedi, R. Pal, M.
Copyright Year 2014
Abstract Thiourea (TU) and methylene blue (MB) react in a molar ratio of 2:1 in acidic medium to give the corresponding disulphide and dihydromethylene blue. The rate of the reaction is considerably enhanced in the presence of 2-mercaptonicotinic acid (MNA) and o-mercaptobenzoic acid (TSA) due to synergetic effect. The order in thiourea is nearly unity in both the cases. The reaction follows a first order kinetics in MB in TU–MNA–MB reaction whereas in TU–TSA–MB reaction, the order in MB varies between zero and one. The rate of reaction increases linearly on increasing [H$^{+}$] in case of TU–MNA–MB reaction while an insignificant influence has been noticed in TU–TSA–MB reaction. The rate increases linearly on increasing the concentration of total sulphydryl group. The synergetic effect of thiolacids is found to depend appreciably on their structure and it is attributed to the participation of a persulphide-like intermediate or a dithiol as revealed by ESI–MS, $^{1}$H-NMR and FT-IR techniques. These studies suggest that the inhibitory effect of thiourea on thyroxine biosynthesis may be minimized through its in situ oxidation assisted by synergetic effect of the thiolacids.
Starting Page 37
Ending Page 42
Page Count 6
File Format PDF
ISSN 03698203
Journal Proceedings of the National Academy of Sciences, India Section A: Physical Sciences
Volume Number 84
Issue Number 1
e-ISSN 22501762
Language English
Publisher Springer India
Publisher Date 2014-01-11
Publisher Place India
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Thiolacids Applied and Technical Physics Synergetic effect Thiourea Atomic, Molecular, Optical and Plasma Physics Oxidation Quantum Physics Physics Methylene blue
Content Type Text
Resource Type Article
Subject Physics and Astronomy Biochemistry, Genetics and Molecular Biology
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