Optical rotatory dispersion measurements in the third cholesteric blue phase

1984 ◽  
Vol 30 (4) ◽  
pp. 1990-1993 ◽  
Author(s):  
Peter J. Collings
Keyword(s):  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Optical Rotatory ◽  
The Third ◽  
Blue Phase

Evidence for Polymorphism within the So-called “Blue Phase” of Cholesteric Esters. II. Selective Reflection and Optical Rotatory Dispersion

1979 ◽  
Vol 34 (2) ◽  
pp. 253-254 ◽  
Author(s):  
K. Bergmann ◽  
P. Pollmann ◽  
G. Scherer ◽  
H. Stegemeyer
Keyword(s):  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Optical Rotatory ◽  
Selective Reflection ◽  
Discontinuous Transition ◽  
Blue Phase ◽  
Polymorphic Forms ◽  
Two Phases

Abstract In cholesteryl nonanoate the existence of two polymorphic forms of the so-called “blue phase” has been evidenced by selective reflection and optical rotatory dispersion measurements. The spectroscopic results indicate a discontinuous transition between the two phases

scholarly journals Bragg reflection band width and optical rotatory dispersion of cubic blue-phase liquid crystals

2016 ◽  
Vol 94 (4) ◽  
Author(s):  
Hiroyuki Yoshida ◽  
Konkanok Anucha ◽  
Yasuhiro Ogawa ◽  
Yuto Kawata ◽  
Masanori Ozaki ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Bragg Reflection ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Band Width ◽  
Optical Rotatory ◽  
Reflection Band ◽  
Phase Liquid ◽  
Blue Phase

scholarly journals Homoserine and diaminobutyric acid in the mucopeptide-precursor-nucleotides and cell walls of some plant-pathogenic corynebacteria

1971 ◽  
Vol 121 (3) ◽  
pp. 417-423 ◽  
Author(s):  
H. R. Perkins
Keyword(s):  
Cell Wall ◽  
Cell Walls ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Cross Linking ◽  
Amino Group ◽  
Optical Rotatory ◽  
Corynebacterium Sepedonicum ◽  
Diaminobutyric Acid ◽  
The Third

The nucleotide precursors of cell-wall mucopeptide were prepared by vancomycin inhibition of Corynebacterium insidiosum and Corynebacterium poinsettiae. The amino acid in the third position in the former peptide was shown by optical rotatory dispersion of the bisdinitrophenyl derivative to be l-diaminobutyric acid. Homoserine in the nucleotide from C. poinsettiae was catalytically oxidized to aspartic acid, which was then shown to be the l-isomer by optical rotatory dispersion of the trinitrophenyl compound. The sequence for C. insidiosum was UDP-N-acetylmuramyl-glycyl-isoglutamyl- (γ-acetyl)-diaminobutyryl-alanyl-alanine. The cell walls of C. insidiosum and Corynebacterium sepedonicum contained diaminobutyric acid that was optically inactive. It is proposed, therefore, that the primary peptide chain contains the l-isomer with its γ-amino group blocked by acetylation and that cross-linking is achieved by means of the d-isomer, analogous to d-ornithine in C. poinsettiae.

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