scholarly journals Analysis of Solubility Properties of L-Tryptophan in Aqueous Solution based on the Effects of Third Component on Optical Rotatory Dispersion and on Adsorption by Carbon Black

1971 ◽  
Vol 19 (3) ◽  
pp. 441-447 ◽  
Author(s):  
HIDEAKI UMEYAMA ◽  
TSUNEJI NAGAI ◽  
HISASHI NOGAMI
Keyword(s):  
Aqueous Solution ◽  
Carbon Black ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Optical Rotatory

scholarly journals The Conformation of a Soluble Wool Keratin Derivative

1963 ◽  
Vol 16 (1) ◽  
pp. 231 ◽  
Author(s):  
BS Harrap
Keyword(s):  
Aqueous Solution ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Random Coil ◽  
Optical Rotatory ◽  
Upper Limit ◽  
Helical Content ◽  
Degree Of Severity ◽  
Wool Keratin

The conformation of a low-sulphur soluble wool keratin derivative (SCMKA) has been studied by optical rotatory dispersion. On the assumption that the overall conformation consists of a mixture of a-helical and random-coil regions, this protein has a helical content of about 50% in aqueous solution at pH 9�1; this helical content does not vary with the degree of severity of the preparative procedure. The protein may be reversibly converted to the random-coil form by heating to 70�0, or by treatment with urea at concentrations exceeding 6r.r. An increase in pH to 12�5 causes very little change in conformation, such change as does occur being reversible. The maximum helical content which has been induced by solvents into the protein is about 62% in 2-chloroethanol. This probably represents the upper limit of the helical content of this protein as it occurs in the fibre. The changes in the conforma. tion of the protein which occur in several other solvents are briefly discussed.

A combined experimental and theoretical study of optical rotatory dispersion for (R)-glycidyl methyl ether in aqueous solution

2019 ◽  
Vol 21 (7) ◽  
pp. 3644-3655 ◽  
Author(s):  
Franco Egidi ◽  
Tommaso Giovannini ◽  
Gianluca Del Frate ◽  
Paul M. Lemler ◽  
Patrick H. Vaccaro ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Experimental Study ◽  
Methyl Ether ◽  
Solvent Effects ◽  
Theoretical Study ◽  
Optical Rotation ◽  
Classical Model ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Optical Rotatory

We present a theoretical-experimental study of the optical rotation of (R)-glycidylmethylether using a mixed quantum-classical model for solvent effects.

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