Effects of amino acid structure, ionic strength, and magnesium ion concentration on rates of nonenzymic hydrolysis of aminoacyl transfer ribonucleic acid

Biochemistry ◽  
1972 ◽  
Vol 11 (12) ◽  
pp. 2321-2323 ◽  
Author(s):  
James E. Strickland ◽  
K. Bruce Jacobson
Keyword(s):  
Amino Acid ◽  
Ionic Strength ◽  
Ribonucleic Acid ◽  
Ion Concentration ◽  
Magnesium Ion ◽  
Aminoacyl Transfer ◽  
Hydrolysis Of ◽  
Acid Structure ◽  
Amino Acid Structure

Photo-Cross-Linked Hydrogels with Polysaccharide−Poly(amino acid) Structure:  New Biomaterials for Pharmaceutical Applications

2006 ◽  
Vol 7 (4) ◽  
pp. 1302-1310 ◽  
Author(s):  
Giovanna Pitarresi ◽  
Paola Pierro ◽  
Fabio S. Palumbo ◽  
Giuseppe Tripodo ◽  
Gaetano Giammona
Keyword(s):  
Amino Acid ◽  
Pharmaceutical Applications ◽  
Acid Structure ◽  
Amino Acid Structure

Mechanistic Information from the Effect of Pressure on the Kinetics of Hydrolysis of Iodopentaaquochromium(III) Ion

1975 ◽  
Vol 53 (24) ◽  
pp. 3697-3701 ◽  
Author(s):  
Milton Cornelius Weekes ◽  
Thomas Wilson Swaddle
Keyword(s):  
Ionic Strength ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Hydrogen Ion Concentration ◽  
Kinetics Of Hydrolysis ◽  
Rate Of Hydrolysis ◽  
Kinetics Of ◽  
Hydrolysis Of ◽  
Aqueous Hclo ◽  
Conjugate Base

The rate of hydrolysis of iodopentaaquochromium(III) ion has been measured as a function of pressure (0.1 to 250 MPa) and hydrogen ion concentration (0.1 to 1.0 mol kg−1) at 298.2 K and ionic strength 1.0 mol kg−1 (aqueous HClO4–LiClO4). The volumes of activation for the acid independent and inversely acid dependent hydrolysis pathways are −5.4 ± 0.5 and −1.6 ± 0.3 cm3 mol−1 respectively, and are not detectably pressure-dependent. Consideration of these values, together with the molar volume change of −3.3 ± 0.3 cm3 mol−1 determined dilatometrically for the completed hydrolysis reaction, indicates that the mechanisms of the two pathways are associative interchange (Ia) and dissociative conjugate base (Dcb) respectively.

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