ALBERT'S SOLUTION VERSUS POTASSIUM HYDROXIDE SOLUTION IN THE DIAGNOSIS OF TINEA VERSICOLOR

1994 ◽  
Vol 33 (3) ◽  
pp. 182-183 ◽  
Author(s):  
BRUCE PAYLE ◽  
LOURDES SERRANO ◽  
HARLAN C. BIELEY ◽  
BLAS A. REYES
Keyword(s):  
Potassium Hydroxide ◽  
Potassium Hydroxide Solution ◽  
Solution Versus ◽  
Hydroxide Solution ◽  
Tinea Versicolor

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.

New response to sexual characteristics

2021 ◽  
Vol 20 (9) ◽  
pp. 987-987
Author(s):  
V. G.
Keyword(s):  
Potassium Hydroxide ◽  
Sodium Hydroxide Solution ◽  
Potassium Hydroxide Solution ◽  
Test Tube ◽  
Animal Tissues ◽  
Hydroxide Solution ◽  
Sexual Characteristics ◽  
Small Test ◽  
Small Test Tube ◽  
Color Indicator

Prof. Bernatsky (Doctor. Gaz., 1924, No. 18) describes a new specific reaction to the sexual characteristics of plant and animal tissues. 1/4 of the timing is taken. test tissue, crushed in a mortar, placed in a small test tube ("port-fleur"), 1 cube of site is poured, a mixture of equal parts of 0.582% sodium hydroxide solution and 0.816% potassium hydroxide solution, the mixture is thoroughly mixed with a glass rod, and 1 a drop of a color indicator consisting of 2 hours of alcohol (95-96 ) 1% dalpy solution, 1 hour. one

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