Circular dichroism of aqueous solutions and gels of partial benzyl esters of the polysaccharide gellan

1993 ◽  
Vol 76 (1) ◽  
pp. 95-97 ◽  
Author(s):  
Vittorio Crescenzi ◽  
Mariella Dentini ◽  
Sergio Maschio ◽  
Maurizio Segatori
Keyword(s):  
Circular Dichroism ◽  
Aqueous Solutions ◽  
Benzyl Esters ◽  
Circular Dichroïsm

scholarly journals A Raman, SERS and UV-circular dichroism spectroscopic study of N-acetyl-l-cysteine in aqueous solutions

2019 ◽  
Vol 43 (38) ◽  
pp. 15201-15212 ◽  
Author(s):  
R. A. Cobos Picot ◽  
M. Puiatti ◽  
A. Ben Altabef ◽  
R. J. G. Rubira ◽  
S. Sanchez-Cortes ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Circular Dichroism ◽  
Aqueous Solutions ◽  
Spectroscopic Study ◽  
Electronic Properties ◽  
Structural Properties ◽  
Amine Groups ◽  
Circular Dichroïsm

The aim of this work is to evaluate the vibrational and structural properties of N-acetyl-l-cysteine (NAC), and its molecular structure and electronic properties in relation to the action of thiol and amine groups at different pH.

Conformations of Serine in Aqueous Solutions as Revealed by Vibrational Circular Dichroism

ChemPhysChem ◽  
2012 ◽  
Vol 13 (5) ◽  
pp. 1272-1281 ◽  
Author(s):  
Peiyang Zhu ◽  
Guochun Yang ◽  
Mohammad Reza Poopari ◽  
Zhi Bie ◽  
Yunjie Xu
Keyword(s):  
Circular Dichroism ◽  
Aqueous Solutions ◽  
Vibrational Circular Dichroism ◽  
Circular Dichroïsm

scholarly journals Circular Dichroism of Chromopeptides from Phycocyanin

1983 ◽  
Vol 38 (11-12) ◽  
pp. 951-959 ◽  
Author(s):  
C. Schamagl ◽  
E. Köst-Reyes ◽  
S. Schneider ◽  
H.-P. Köst ◽  
H. Scheer
Keyword(s):  
Circular Dichroism ◽  
Aqueous Solutions ◽  
Optical Activity ◽  
Ph Dependence ◽  
Acidic Ph ◽  
Sign Reversal ◽  
Aqueous Buffer ◽  
Ph Dependent ◽  
Circular Dichroïsm

The circular dichroism of bilipeptides from Spirulina geitleri phycocyanin is strongly solvent and pH dependent. Maximum optical activity has been observed in aqueous solutions containing urea (8 ᴍ). In aqueous buffer, a sign reversal occurred upon the change from neutral to acidic pH; in methanolic solutions shows the optical activity a strong pH dependence both with respect to sign and magnitude. These findings have been rationalized by the presence of chrom ophorepeptide interactions, which are minimized in the presence of urea. M olecular orbital calculations indicate that the observed sign reversal is not necessarily due to a reversal of the chirality of the entire chromophore, but may also result from more localized conform ational changes

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