232. α-1,4-Glucosans. Part XI. The absorption spectra of glycogen– and amylopectin–iodine complexes

1961 ◽  
Vol 0 (0) ◽  
pp. 1183-1190 ◽  
Author(s):  
A. R. Archibald ◽  
I. D. Fleming ◽  
A. Margaret Liddle ◽  
D. J. Manners ◽  
G. A. Mercer ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Iodine Complexes

Study of the Infrared Absorption Spectra of Some Pyridine Derivatives-Iodine Complexes

1976 ◽  
Vol 30 (2) ◽  
pp. 200-204 ◽  
Author(s):  
F. M. Abdel Kerim ◽  
F. Abou El Fotouh
Keyword(s):  
Complex Formation ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Ir Absorption ◽  
Pyridine Derivatives ◽  
Thermodynamic Constants ◽  
Ir Absorption Spectra ◽  
Infrared Absorption Spectra ◽  
The Stability ◽  
Iodine Complexes

The ir absorption spectra of some pyridine derivatives-iodine complexes were measured in the region 400 to 1400 cm−1 and the results are discussed. The effect of complex formation on the intensities of some of the bands was investigated. The thermodynamic constants of these complexes were calculated. It was found that the stability of the complex depends to a large extent on the electronegativity as well as the position of the substituent on the pyridine nucleus. The structures of formed complexes are discussed.

Ultraviolet Absorption of Refractory Elements by a Dual Laser Plasma Method

1988 ◽  
Vol 102 ◽  
pp. 243-246
Author(s):  
J.T. Costello ◽  
W.G. Lynam ◽  
P.K. Carroll
Keyword(s):  
Absorption Spectra ◽  
Laser Plasma ◽  
Optical Pulse ◽  
Ionic Species ◽  
Neutral Species ◽  
Plasma Method ◽  
Plasma Technique ◽  
Refractory Elements ◽  
Delay Times ◽  
Dual Laser

AbstractThe dual laser-produced plasma technique for the study of ionic absorption spectra has been developed by the use of two Q-switched ruby lasers to enable independent generation of the absorbing and back-lighting plasmas. Optical pulse handling is used in the coupling cicuits to enable reproducible pulse delays from 250 nsec. to 10 msec, to be achieved. At delay times > 700 nsec. spectra of essentially pure neutral species are observed. The technique is valuable, not only for obtaining the neutral spectra of highly refractory and/or corrosive materials but also for studying behaviour of ionic species as a function of time. Typical spectra are shown in Fig. 1.

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