scholarly journals Treatment of Pityriasis Versicolor. A Comparative Study of Topical 4% Potassium Hydroxide Solution Versus 1% Clotrimazole Solution

2013 ◽  
Vol 3 (4) ◽  
pp. 2317-2324
Author(s):  
Hayder Al_Hamamy
Keyword(s):  
Comparative Study ◽  
Potassium Hydroxide ◽  
Potassium Hydroxide Solution ◽  
Pityriasis Versicolor ◽  
Solution Versus ◽  
Hydroxide Solution

Comparative study of 5% and 2.5% potassium hydroxide solution for molluscum contagiosum in children

2013 ◽  
Vol 33 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Derya Uçmak ◽  
Meltem Zeynep Akkurt ◽  
Seval Dogruk Kacar ◽  
Bilal Sula ◽  
Mustafa Arica
Keyword(s):  
Comparative Study ◽  
Potassium Hydroxide ◽  
Potassium Hydroxide Solution ◽  
Molluscum Contagiosum ◽  
Hydroxide Solution

Kinetics and mechanism of cyclization of N-(2-methoxycarbonylphenyl)-N’-methylsulphonamide to 3-methyl-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide

1991 ◽  
Vol 56 (8) ◽  
pp. 1701-1710 ◽  
Author(s):  
Jaromír Kaválek ◽  
Vladimír Macháček ◽  
Miloš Sedlák ◽  
Vojeslav Štěrba
Keyword(s):  
Potassium Hydroxide ◽  
Acid Catalysis ◽  
Potassium Hydroxide Solution ◽  
Hydroxide Solution ◽  
General Base ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Cyclization Kinetics ◽  
Rate Limiting ◽  
Kinetics Of

The cyclization kinetics of N-(2-methylcarbonylphenyl)-N’-methylsulfonamide (IIb) into 3-methyl-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide (Ib) has been studied in ethanolamine, morpholine, and butylamine buffers and in potassium hydroxide solution. The cyclization is subject to general base and general acid catalysis. The value of the Bronsted coefficient β is about 0.1, which indicates that splitting off of the proton from negatively charged tetrahedral intermediate represents the rate-limiting and thermodynamically favourable step. In the solutions of potassium hydroxide the cyclization of dianion of the starting ester IIb probably becomes the rate-limiting step.

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