Kinetics and mechanism of oxidation of some simple reducing sugars by permanganate ion in alkaline medium

Odebunmi, Ezekiel O.; Owalude, Samson O.

doi:10.1007/bf03246143

Cited by 14 publications

(9 citation statements)

References 12 publications

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“…Chromotropic acid (1, 8-dihydro-napthalene-3, b-disulfonic acid) was added to reaction mixture. The development of a violet pink colour confirmed the presence of formic acid in the reaction mixture 27 .The Formation of lower sugar has also been reported earlier 28 . Thus the products of lactose and maltose under the kinetic conditions are formic acid corresponding lower sugars.…”

Section: Stoichiometry and Product Analysissupporting

confidence: 80%

Inhibition Effect of Surfactants in Alkaline Kmno4 Oxidation of Disaccharides: A Kinetic Study

Tripathi

Upadhyay

2013

J. Chil. Chem. Soc.

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An inactive premicellar/micellar {Surfactant-MnO 4-} aggregate has been found to inhibit the rate of oxidation of disaccharides viz. maltose and lactose by alkaline KMnO 4. The order of reaction in oxidant is unity while that in Substrate and alkali has been found to decrease from unity at higher [Substrate] and [OH-], respectively. The observed rate constants were in order of k aq > k NaLS > k Tx-100 > k CTAB , which has been explained in terms of electrostatic and hydrophobic forces.

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Section: Stoichiometry and Product Analysissupporting

confidence: 80%

Inhibition Effect of Surfactants in Alkaline Kmno4 Oxidation of Disaccharides: A Kinetic Study

Tripathi

Upadhyay

2013

J. Chil. Chem. Soc.

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“…The large negative value of DS* in the presence of micelles indicates that a more ordered activated complex is formed, while the high positive values of DH* indicate that the activated complex is highly solvated. The almost constant values of thermodynamic activation parameters in different environments indicate a common mechanism [31,33].…”

Section: Formation Of Nanoparticles In Alkaline Mediummentioning

confidence: 99%

Mechanistic and kinetic study of the formation of silver nanoparticles by reduction of silver(I) in the presence of surfactants and macromolecules

Ismail

Ewais

2015

Transition Met Chem

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The kinetics of formation of silver nanoparticles by reduction of silver(I) with galactose were studied spectrophotometrically in the presence of surfactants and chitosan as stabilizing agents. The reaction was carried out under pseudo-first-order conditions by using a tenfold excess of [galactose] over [Ag ? ]. The effects of cetyltrimethylammonium bromide (cationic surfactant) and sodium dodecyl sulfate (anionic surfactant) on the reaction rate have been studied. Chitosan inhibits the rate of reaction by up to 70 %. TEM imaging shows that there is no aggregation of silver nanoparticles in the presence of chitosan. The rate of reaction increases with increasing [OH -]. A mechanism for the reaction is proposed, and the rate equation derived from this mechanism was consistent with the experimental behaviors. Thermodynamic activation parameters were calculated.

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“…Change in pH of solutions is caused by the production of gluconic acid from glucose catalyzed by GOD [7,8]. Figure 2 shows the dimensional response of the polymers to different pH environment.…”

Section: Ph Responsiveness Of the Selected Polymersmentioning

confidence: 99%

Fabrication of Glucose-Sensitive Layer-by-Layer Films for Potential Controlled Insulin Release Applications

Talusan

Usman

Payawan

2015

MATEC Web of Conferences

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Abstract. Self-regulated drug delivery systems (DDS) are potential alternative to the conventional method of introducing insulin to the body due to their controlled drug release mechanism. In this study, Layer-by-Layer technique was utlized to manufacture drug loaded, pH responsive thin films. Insulin was alternated with pH-sensitive, [2-(dimethyl amino) ethyl aminoacrylate] (PDMAEMA) and topped of with polymer/glucose oxidase (GOD) layers. Similarly, films using a different polymer, namely Poly(Acrylic Acid) (PAA) were also fabricated. Exposure of the films to glucose solutions resulted to the production of gluconic acid causing a polymer conformation change due to protonation, thus releasing the embedded insulin. The insulin release was monitored by subjecting the dipping glucose solutions to Bradford Assay. Films exhibited a reversal in drug release profile in the presence of glucose as compared to without glucose. PAA films were also found out to release more insulin compared to that of the PDMAEMA films.The difference in the profile of the two films were due to different polymer-GOD interactions, since both films exhibited almost identical profiles when embedded with Poly(sodium 4-styrenesulfonate) (PSS) instead of GOD.

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Kinetics and mechanism of oxidation of some simple reducing sugars by permanganate ion in alkaline medium

Cited by 14 publications

References 12 publications

Inhibition Effect of Surfactants in Alkaline Kmno4 Oxidation of Disaccharides: A Kinetic Study

Inhibition Effect of Surfactants in Alkaline Kmno4 Oxidation of Disaccharides: A Kinetic Study

Mechanistic and kinetic study of the formation of silver nanoparticles by reduction of silver(I) in the presence of surfactants and macromolecules

Fabrication of Glucose-Sensitive Layer-by-Layer Films for Potential Controlled Insulin Release Applications

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