HEAT OF HYDROLYSIS OF URANIUM (IV) IN PERCHLORIC ACID SOLUTIONS

1955 ◽  
Vol 33 (12) ◽  
pp. 1775-1779 ◽  
Author(s):  
R. H. Betts
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Calorimetric Method ◽  
Acid Solutions ◽  
Perchloric Acid Solution ◽  
A Value ◽  
Hydroxyl Ion ◽  
Hydrolysis Of ◽  
Heat Of Hydrolysis ◽  
Good Agreement

The heat of hydrolysis of uranium (IV) in perchloric acid solution has been measured by a spectrophotometric technique. A value of 10.7 ± 1 kcal. per mole was obtained, in good agreement with a previous value determined by a calorimetric method. The entropy of association of uranium (IV) with hydroxyl ion is +52 e.u.

ChemInform Abstract: THE HYDROLYSIS OF METHYL METHYLARYLPHOSPHINATES IN PERCHLORIC ACID SOLUTION

1973 ◽  
Vol 4 (45) ◽  
pp. no-no
Author(s):  
J. F. BUNNETT ◽  
J. O. EDWARDS ◽  
D. V. WELL ◽  
H. J. BRASS ◽  
R. CURCI
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Perchloric Acid Solution ◽  
Hydrolysis Of

Hydrolysis of methyl methylarylphosphinates in perchloric acid solution

1973 ◽  
Vol 38 (15) ◽  
pp. 2703-2707 ◽  
Author(s):  
J. F. Bunnett ◽  
John O. Edwards ◽  
Darthon V. Wells ◽  
Herbert J. Brass ◽  
Ruggero Curci
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Perchloric Acid Solution ◽  
Hydrolysis Of

scholarly journals Studies on the Stability of Amides. III. Hydrolysis of Amides in Aqueous Perchloric Acid Solution

1972 ◽  
Vol 20 (8) ◽  
pp. 1778-1784 ◽  
Author(s):  
TSUKINAKA YAMANA ◽  
YUZO MIZUKAMI ◽  
AKIRA TSUJI ◽  
MASAHIRO IKUTA
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Perchloric Acid Solution ◽  
Aqueous Perchloric Acid ◽  
The Stability ◽  
Hydrolysis Of

Extended Preservation of Iron for Transmission

1967 ◽  
Vol 25 ◽  
pp. 354-355
Author(s):  
E. P. Abrahamson II ◽  
M. W. Dumais
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Microscopy Study ◽  
Perchloric Acid Solution ◽  
Transmission Microscopy ◽  
Iron Base ◽  
Cold Stage

In a transmission microscopy study of iron and dilute iron base alloys, it was determined that it is possible to preserve specimens for extended periods of time. Our specimens were prepunched from 5 to 8 mil sheet to microscope size and annealed for several hours at 700°C. They were then thinned in a glacial acetic-12 percent perchloric acid solution using 10 volts and 20 milliamperes, at a temperature of 8 to 14°C.It was noted that by the use of a cold stage, the same specimen can be observed for periods up to one week without excess contamination. When removal of the specimen from the column becomes necessary, it was observed that a specimen may be kept for later observation in 1,2 dichloroethene or methanol for periods in excess of two weeks.

A simple procedure using trinitrobenzenesulphonic acid for monitoring proteolysis in cheese

1988 ◽  
Vol 55 (4) ◽  
pp. 585-596 ◽  
Author(s):  
Anna Polychroniadou
Keyword(s):  
Simple Procedure ◽  
Water Soluble ◽  
Acid Solutions ◽  
Amino Groups ◽  
Total N ◽  
Cheese Ripening ◽  
Amino Acid Solutions ◽  
Hydrolysis Of ◽  
Good Agreement

SummaryA simple, rapid and sensitive spectrophotometric assay was developed and evaluated for monitoring proteolysis during cheese ripening, based on the fact that α-amino groups released by hydrolysis of cheese proteins react with trinitrobenzenesulphonic acid to form products that absorb strongly at 420 nm. A linear relationship was shown to exist between A420 and concentration of free α amino groups up to 0·5 HIM (r = 0·999, 38 df, P < 0·001). Repeatability of the method was satisfactory. The coefficient of variance was 0·53% for amino acid solutions and 1·19% for cheese extracts. Average recovery of glycine added to the cheese was 104 ± 2·9%. A comparison of the above method with that of determination of water-soluble N to total N ratio showed that there was good agreement between these two methods of assessment of proteolysis in cheese (r = 0·857, 32 df, P < 0·001). Mainly Feta and Teleme cheese were examined, but a similar correlation was obtained with hard Greek cheeses. Analytical conditions of the procedure are discussed.

Dinuclear complexes of tetravalent cerium in an aqueous perchloric acid solution

2012 ◽  
Vol 41 (24) ◽  
pp. 7190 ◽  
Author(s):  
Atsushi Ikeda-Ohno ◽  
Satoru Tsushima ◽  
Christoph Hennig ◽  
Tsuyoshi Yaita ◽  
Gert Bernhard
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Dinuclear Complexes ◽  
Perchloric Acid Solution ◽  
Aqueous Perchloric Acid ◽  
Tetravalent Cerium

IONIC SPECIES IN CERIC PERCHLORATE SOLUTIONS

1951 ◽  
Vol 29 (10) ◽  
pp. 818-827 ◽  
Author(s):  
T. J. Hardwick ◽  
E. Robertson
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Spectral Study ◽  
Wave Length ◽  
Ionic Species ◽  
Thermodynamic Quantities ◽  
Perchloric Acid Solution ◽  
Extinction Coefficients ◽  
Ceric Ion ◽  
Molar Extinction Coefficients

Ceric ion has been shown to exist in perchloric acid solution as a mixture of Ce4+, CeOH3+, and a dimer, probably (Ce-O-Ce)6+. From a spectral study between 395 and 430 mμ, the values of the equilibrium ratios have been determined, along with the molar extinction coefficients of each ion over this region of wave length. The thermodynamic quantities ΔH, ΔF°, and ΔS° have been determined for each reaction.

Sign in / Sign up

Export Citation Format

Share Document