A Revision of the Stereochemistry of Lactucin

1973 ◽  
Vol 51 (21) ◽  
pp. 3626-3630 ◽  
Author(s):  
Frank William Bachelor ◽  
Shô Itô
Keyword(s):  
Circular Dichroism ◽  
Circular Dichroïsm ◽  
Erroneous Assignment

On the basis of circular dichroism measurements on lactucin, hydroxyachillin, and acetoxyachillin the stereochemistry of the C-5 hydrogen has been revised to the 5α configuration. The reasons for the former erroneous assignment are reexamined and the structures of several hexahydrolactucin derivatives are reinterpreted.

Optical rotatory dispersion and circular dichroism of diastereoisomers. I. The ephedrines and chloramphenicols

1969 ◽  
Vol 47 (11) ◽  
pp. 1957-1963 ◽  
Author(s):  
L. A. Mitscher ◽  
F. Kautz ◽  
J. LaPidus
Keyword(s):  
Circular Dichroism ◽  
Absorption Band ◽  
Absolute Configuration ◽  
Cotton Effect ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Optical Rotatory ◽  
Apparent Correlation ◽  
Circular Dichroïsm ◽  
Erroneous Assignment

Optical rotatory dispersion (o.r.d.) and circular dichroism measurements are reported for all four diastereoisomers in both the ephedrine and chloramphenicol series. The Cotton effect associated with the 1Lb absorption band is a reliable guide to absolute configuration in both series whereas the 1La band is not. Circular dichroism measurements are preferred as the 1La band dominates the o.r.d. curves to such an extent that erroneous assignment is quite possible. An attempt to relate the sign and intensity of the 1Lb Cotton effect with rotamer population failed due to lack of apparent correlation.

Characterization of Tamm-Horsfall Urinary Glycoprotein

1973 ◽  
Vol 31 ◽  
pp. 420-421
Author(s):  
John P. Robinson ◽  
J. David Puett
Keyword(s):  
Electron Microscopy ◽  
Circular Dichroism ◽  
Secondary Structure ◽  
Quaternary Structure ◽  
Normal Adult ◽  
Morphological Properties ◽  
Adult Males ◽  
Circular Dichroïsm ◽  
Urinary Glycoprotein

Much work has been reported on the chemical, physical and morphological properties of urinary Tamm-Horsfall glycoprotein (THG). Although it was once reported that cystic fibrotic (CF) individuals had a defective THG, more recent data indicate that THG and CF-THG are similar if not identical.No studies on the conformational aspects have been reported on this glycoprotein using circular dichroism (CD). We examined the secondary structure of THG and derivatives under various conditions and have correlated these results with quaternary structure using electron microscopy.THG was prepared from normal adult males and CF-THG from a 16-year old CF female by the method of Tamm and Horsfall. CF female by the method of Tamm and Horsfall.

Circular dichroism spectra of adsorbed dye-aggregates

1968 ◽  
Vol 65 ◽  
pp. 146-151 ◽  
Author(s):  
G. Scheibe ◽  
O. Wörz ◽  
F. Haimerl ◽  
W. Seiffert ◽  
J. Winkler
Keyword(s):  
Circular Dichroism ◽  
Circular Dichroism Spectra ◽  
Circular Dichroïsm

Absolute configuration of the 1,2-diol of digoxin determined by electronic circular dichroism induced with [Mo2(OAc)4]

Planta Medica ◽  
2015 ◽  
Vol 81 (11) ◽  
Author(s):  
Y Ren ◽  
H Taborda Ribas ◽  
E Sass ◽  
HB Chai ◽  
DM Lucas ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Electronic Circular Dichroism ◽  
Circular Dichroïsm

CIRCULAR DICHROISM STUDIES ON HUMAN CHORIONIC GONADOTROPIN (HCG) AND ITS SUBUNITS

1973 ◽  
Vol 71 (4_Suppl) ◽  
pp. S54 ◽  
Author(s):  
U. Hilgenfeldt ◽  
W. E. Merz ◽  
R. Brossmer
Keyword(s):  
Circular Dichroism ◽  
Chorionic Gonadotropin ◽  
Human Chorionic Gonadotropin ◽  
Circular Dichroïsm

LINEAR-CIRCULAR DICHROISM OF ONE-PHOTON ABSORPTION OF LIGHT IN NARROW-ZONE SEMICONDUCTORS. CONTRIBUTION OF THE EFFECT OF COHERENT SATURATION

2020 ◽  
pp. 49-53
Author(s):  
V. R. Rasulov ◽  
R. Y. Rasulov ◽  
B. B. Axmedov ◽  
I. A. Muminov ◽  
B. Z. Polvonov
Keyword(s):  
Circular Dichroism ◽  
Photon Absorption ◽  
Narrow Zone ◽  
Absorption Of Light ◽  
Circular Dichroïsm

ON THE THEORY OF THREE PHOTONIC LINEAR CIRCULAR DICHROISM IN A HOLE-CONDUCTION SEMICONDUCTOR

2020 ◽  
pp. 73-76
Author(s):  
V. R. Rasulov ◽  
R. Y. Rasulov ◽  
I. M. Eshboltaev ◽  
R. R. Sultonov ◽  
B. Z. Polvonov
Keyword(s):  
Circular Dichroism ◽  
Hole Conduction ◽  
Circular Dichroïsm

Fan-shaped mid-infrared chiral metamaterials based on indium tin oxide and their circular dichroism

2020 ◽  
Vol 13 (4) ◽  
pp. 722-727
Author(s):  
ZHU Ye-xin ◽  
◽  
◽  
LI Ya-nan ◽  
SHI Wei-jie ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Mid Infrared ◽  
Chiral Metamaterials ◽  
Circular Dichroïsm

Biological Sensing with Terahertz Circular Dichroism Spectroscopy

2005 ◽  
Author(s):  
Kevin W. Plaxco ◽  
S. J. Allen
Keyword(s):  
Circular Dichroism ◽  
Circular Dichroism Spectroscopy ◽  
Biological Sensing ◽  
Circular Dichroïsm
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