Chromic Acid Esters as Corrosion Inhibitors

The hydrolysis of the chromate ester, derived from 1-methylcyclohexanol, was studied by electrochemical methods. Progressive and complete hydrolysis in an open or closed system yields chromic acid and 1-methylcyclohexanol. No evidence of the presence of monoester was detected. In a closed system, where most of the hydrolyzed alcohol is retained in solution, a side reaction between chromic acid and the alcohol has been detected and followed by conductivity measurements.Electrochemical characteristics of pure iron immersed in aqueous solutions containing hydrolyzed ester were found to be identical to those in aqueous solutions containing equivalent quantities of CrVI as CrO3. Sulfuric acid additions to the above solutions still give comparable electrochemical characteristics; however, the anodic current in the passive region was found to be less for solutions containing hydrolyzed ester than for solutions containing equivalent quantities of CrVI as CrO3.

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Evidence for the Formation of Hippuryl Chymotrypsin during the Hydrolysis of Hippuric Acid Esters

Journal of Biological Chemistry ◽

10.1016/s0021-9258(18)81126-7 ◽

1963 ◽

Vol 238 (5) ◽

pp. 1718-1723 ◽

Cited By ~ 8

Author(s):

Richard M. Epand ◽

Irwin B. Wilson

Keyword(s):

Hippuric Acid ◽

Hydrolysis Of ◽

Acid Esters

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Kinetic studies on the rate of hydrolysis of N-ethyl-N′-(dimethylaminopropyl)carbodiimide in aqueous solutions using mass spectrometry and capillary electrophoresis

Analytical Biochemistry ◽

10.1016/s0003-2697(02)00276-2 ◽

2002 ◽

Vol 310 (1) ◽

pp. 122-124 ◽

Cited By ~ 15

Author(s):

Q Paula Lei ◽

David H Lamb ◽

Ron K Heller ◽

Anthony G Shannon ◽

Robert Ryall ◽

...

Keyword(s):

Mass Spectrometry ◽

Capillary Electrophoresis ◽

Aqueous Solutions ◽

Kinetic Studies ◽

Rate Of Hydrolysis ◽

Hydrolysis Of

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Catalysis by acetylcholinesterase. Acceleration of the hydrolysis of neutral acetic acid esters by certain aromatic cations.

Journal of Biological Chemistry ◽

10.1016/s0021-9258(19)66955-3 ◽

1977 ◽

Vol 252 (20) ◽

pp. 7200-7206

Author(s):

P Barnett ◽

T L Rosenberry

Keyword(s):

Acetic Acid ◽

Hydrolysis Of ◽

Acetic Acid Esters ◽

Acid Esters

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Chemical studies on insecticides VI : The rate of hydrolysis of some phosphorus acid esters

Recueil des Travaux Chimiques des Pays-Bas ◽

10.1002/recl.19580771012 ◽

2010 ◽

Vol 77 (10) ◽

pp. 973-981 ◽

Cited By ~ 5

Author(s):

J. A. A. Ketelaar ◽

H. R. Gersmann

Keyword(s):

Phosphorus Acid ◽

Chemical Studies ◽

Rate Of Hydrolysis ◽

Phosphorus Acid Esters ◽

Hydrolysis Of ◽

Acid Esters

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Mechanism of action of streptococcal proteinase. III. Effect of pH, organic solvents, and deuterium oxide on the proteinase-catalyzed hydrolysis of N-acylamino acid esters

Biochemistry ◽

10.1021/bi00726a025 ◽

1973 ◽

Vol 12 (2) ◽

pp. 338-345 ◽

Cited By ~ 8

Author(s):

Alexander A. Kortt ◽

Teh-Yung Liu

Keyword(s):

Organic Solvents ◽

Mechanism Of Action ◽

Deuterium Oxide ◽

Effect Of Ph ◽

Streptococcal Proteinase ◽

Hydrolysis Of ◽

Acid Esters

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Kinetics of hydrolysis of 4-methoxy-2-[2-hydroxy-3(4-phenyl-1-piperazinyl)]propyl-2,3-dihydro-6-methyl-1,3-dioxo-1H-pyrrolo[3,4-c]pyridine in aqueous solutions

Il Farmaco ◽

10.1016/j.farmac.2004.02.007 ◽

2004 ◽

Vol 59 (6) ◽

pp. 437-442 ◽

Cited By ~ 4

Author(s):

Izabela Muszalska

Keyword(s):

Aqueous Solutions ◽

Kinetics Of Hydrolysis ◽

Kinetics Of ◽

Hydrolysis Of

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THE WATER-SOLUBLE POLYSACCHARIDES OF DERMATOPHYTES: IV. GALACTOMANNANS I FROM TRICHOPHYTON GRANULOSUM, TRICHOPHYTON INTERDIGITALE, MICROSPORUM QUINCKEANUM, TRICHOPHYTON RUBRUM, AND TRICHOPHYTON SCHÖNLEINII

Canadian Journal of Chemistry ◽

10.1139/v65-005 ◽

1965 ◽

Vol 43 (1) ◽

pp. 30-39 ◽

Cited By ~ 46

Author(s):

C. T. Bishop ◽

M. B. Perry ◽

F. Blank ◽

F. P. Cooper

Keyword(s):

Aqueous Solutions ◽

Copper Complexes ◽

Trichophyton Rubrum ◽

Periodate Oxidation ◽

Structural Features ◽

Water Soluble ◽

Major Constituent ◽

Branch Points ◽

Terminal Units ◽

Hydrolysis Of

A group of polysaccharides, called galactomannans I, were precipitated as their insoluble copper complexes from aqueous solutions of the crude polysaccharides obtained from each of the organisms designated in the title. The five galactomannans I were homogeneous under conditions of electrophoresis and ultracentrifugation and had high positive specific rotations. The major constituent monosaccharide was D-mannose; amounts of D-galactose ranged from nil for the polysaccharide from T. rubrum to 13% for that from T. schönleinii. Methylation and hydrolysis of the five galactomannans I yielded varying amounts of the following: 2,3,5,6-tetra-O-methyl-D-galactose (not present in the products from T. rubrum), 2,3,4,6-tetra-O-methyl-D-mannose, 2,3,4-tri-O-methyl-D-mannose, 2,4,6-tri-O-methyl-D-mannose, 3,4-di-O-methyl-D-mannose, and 3,5-di-O-methyl-D-mannose. Periodate oxidation results agreed with the methylation studies. The gross structural features of each galactomannan I appear to be the same, namely, a basic chain of 1 → 6 linked α-D-mannopyranose units for approximately every 22 of which there is a 1 → 3 linked α-D-mannopyranose residue. Branch points occur along the 1 → 6 linked chain at the C2 positions of the D-mannopyranose units and once in every 45 units at the C2 position of a 1 → 6 linked D-mannofuranose residue. The D-galactose in the polysaccharides is present exclusively as non-reducing terminal furanose units; non-reducing terminal units of D-mannopyranose are also present. The variations in the identities and relative amounts of the non-reducing terminal units were the only apparent differences in the gross structural features within this group of polysaccharides.

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