THE INDUCED INFRARED ABSORPTION SPECTRUM OF SOLID DEUTERIUM AND SOLID HYDROGEN DEUTERIDE

1966 ◽  
Vol 44 (2) ◽  
pp. 373-398 ◽  
Author(s):  
A. Crane ◽  
H. P. Gush
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption Spectrum ◽  
Translational Motion ◽  
Single Molecules ◽  
Absorption Bands ◽  
Hydrogen Deuteride ◽  
Phonon Branch ◽  
Solid Mixture ◽  
Solid Deuterium ◽  
Wave Numbers

The fundamental absorption bands of deuterium and hydrogen deuteride have been observed in the solid at a temperature of 1.9 °K. Features are observed that correspond to rotation–vibration transitions in single molecules, in pairs of molecules, and to molecular transitions accompanied by the creation of phonons. Several features were observed in the HD spectrum that arise from the fact that HD is heteronuclear; one of these was a sharp absorption line due to ΔJ = 1 transitions in single molecules. In addition, an unusual split-phonon branch was observed with a minimum of zero absorption a few wave numbers below the frequency of the ΔJ = 1 transition. This split-phonon feature is apparently a result of strong interaction between the rotation of the molecule and its translational motion in the lattice. The spectrum of a solid mixture of 10% HD and 90% H2 was also studied. The phonon branch accompanying the Q1(0) line of HD and the phonon branch accompanying the Q1(0) line of H2 observed in the same crystal have a very different shape, the former exhibiting a distinct minimum as for pure HD.

CONVERSION OF PROTHROMBIN TO AUTOPROTHROMBIN II

1956 ◽  
Vol 34 (6) ◽  
pp. 1199-1209 ◽  
Author(s):  
John A. Penner ◽  
F. Duckert ◽  
Shirley A. Johnson ◽  
Walter H. Seegers
Keyword(s):  
Absorption Spectrum ◽  
Calcium Ions ◽  
Infrared Absorption Spectrum ◽  
Heterogeneous Mixture ◽  
Absorption Bands ◽  
Platelet Factor ◽  
Lipid Material ◽  
Single Substance ◽  
Absorption Pattern ◽  
Generation Test

With thromboplastin, Ac-globulin, and calcium ions, purified prothrombin converts to biothrombin. This derivative of prothrombin is also obtained with purified platelet factor 3, Ac-globulin, calcium ions, and autoprothrombin II. Need for the latter substance by platelet factor 3 is one marked distinction that can be made between thromboplastin and platelet factor 3. Thromboplastin does not require a cofactor such as platelet cofactor I or autoprothrombin II. Ether extracts of dry brain or of purified platelet factor 3 or of whole platelets yield lipid material. The lipids obtained in this manner are active in a modified Biggs and Douglas thromboplastin generation test; but in contrast to the original thromboplastin or purified platelet factor 3 from which they are obtained do not activate purified prothrombin to thrombin. The lipid material is thus distinctly different from thromboplastin or from platelet factor 3. The lipid is also active in the conversion of prothrombin to autoprothrombin II when purified prothrombin is the substrate or when the prothrombin is in the original plasma or whole blood. Extraction of purified platelet factor 3 leaves a protein residue and it is believed that platelet factor 3 is a lipoprotein. The infrared absorption spectrum of the lipid obtained from purified platelet factor 3 shows strong absorption bands. From the general absorption pattern, we infer that the lipid is not a heterogeneous mixture, but most likely a single substance or consists of several that are nearly alike. Platelet factor 3 lipid(s) is most likely a cephalin-like compound.

scholarly journals Infrared absorption spectrum of solid deuterium at near-triple point temperature

2013 ◽  
Vol 62 (16) ◽  
pp. 163301
Author(s):  
Liu Jiang-Ping ◽  
Bi Peng ◽  
Lei Hai-Le ◽  
Li Jun ◽  
Wei Jian-Jun
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Triple Point ◽  
Infrared Absorption Spectrum ◽  
Point Temperature ◽  
Solid Deuterium ◽  
Triple Point Temperature

α-OBSCURINE AND β-OBSCURINE: STRUCTURE STUDIES

1953 ◽  
Vol 31 (10) ◽  
pp. 952-957 ◽  
Author(s):  
Barry P. Moore ◽  
Léo Marion
Keyword(s):  
Absorption Spectrum ◽  
Double Bond ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
The Other ◽  
Ultraviolet Absorption Spectrum ◽  
Amino Group ◽  
Absorption Bands ◽  
Secondary Amino ◽  
Cyclic Lactam

The alkaloid hitherto described as obscurine has been shown to consist of a mixture of two bases, α-obscurine (C17H26ON2) and β-obscurine (C17H24ON2). Dehydregenation of α-obscurine by heating with palladium-charcoal gives rise to 7-methylquinoline and 6-methyl-α-pyridone. The infrared absorption spectrum of the base shows absorption bands indicative of a carbony and of a secondary amino group, possibly in a cyclic lactam, while absorption in the ultraviolet indicates the presence of a double bond conjugated with the carbonyl group. β-Obscurine on the other hand contains an α-pyridone ring as shown by its infrared absorption spectrum and also by the similarity of its ultraviolet absorption spectrum with that of 6-methyl-α-pyridone.

CONVERSION OF PROTHROMBIN TO AUTOPROTHROMBIN II

1956 ◽  
Vol 34 (1) ◽  
pp. 1199-1209 ◽  
Author(s):  
John A. Penner ◽  
F. Duckert ◽  
Shirley A. Johnson ◽  
Walter H. Seegers
Keyword(s):  
Absorption Spectrum ◽  
Calcium Ions ◽  
Infrared Absorption Spectrum ◽  
Heterogeneous Mixture ◽  
Absorption Bands ◽  
Platelet Factor ◽  
Lipid Material ◽  
Single Substance ◽  
Absorption Pattern ◽  
Generation Test

With thromboplastin, Ac-globulin, and calcium ions, purified prothrombin converts to biothrombin. This derivative of prothrombin is also obtained with purified platelet factor 3, Ac-globulin, calcium ions, and autoprothrombin II. Need for the latter substance by platelet factor 3 is one marked distinction that can be made between thromboplastin and platelet factor 3. Thromboplastin does not require a cofactor such as platelet cofactor I or autoprothrombin II. Ether extracts of dry brain or of purified platelet factor 3 or of whole platelets yield lipid material. The lipids obtained in this manner are active in a modified Biggs and Douglas thromboplastin generation test; but in contrast to the original thromboplastin or purified platelet factor 3 from which they are obtained do not activate purified prothrombin to thrombin. The lipid material is thus distinctly different from thromboplastin or from platelet factor 3. The lipid is also active in the conversion of prothrombin to autoprothrombin II when purified prothrombin is the substrate or when the prothrombin is in the original plasma or whole blood. Extraction of purified platelet factor 3 leaves a protein residue and it is believed that platelet factor 3 is a lipoprotein. The infrared absorption spectrum of the lipid obtained from purified platelet factor 3 shows strong absorption bands. From the general absorption pattern, we infer that the lipid is not a heterogeneous mixture, but most likely a single substance or consists of several that are nearly alike. Platelet factor 3 lipid(s) is most likely a cephalin-like compound.

scholarly journals Ultra-violet transparency of the lower atmosphere, and relative poverty in Ozone

1918 ◽  
Vol 94 (660) ◽  
pp. 260-268 ◽  
Keyword(s):  
Absorption Spectrum ◽  
Solar Spectrum ◽  
Ultra Violet ◽  
Lower Atmosphere ◽  
Atmospheric Ozone ◽  
Absorption Bands ◽  
Relative Poverty ◽  
Narrow Bands

Many years ago it was suggested by Hartley* that the limit of the solar spectrum towards the ultra-violet was attributable to absorption by atmospheric ozone, which, as he showed, would give rise to a general absorption beginning at about the place where the solar spectrum ends. In a recent paper by Prof. A. Fowler and myself,† the evidence for this view was very much strengthened. For it was shown that just on the limits of extinction the solar spectrum shows a series of narrow absorption bands which are eventually merged in the general absorption, and these narrow bands are precisely reproduced in the absorption spectrum of ozone. For my own part, I do not feel any doubt that ozone in the atmosphere is the effective cause limiting the solar spectrum.

Infrared absorption spectrum of vanadyl pentaammoniate

1971 ◽  
Vol 15 (4) ◽  
pp. 1349-1351
Author(s):  
L. V. Kobets ◽  
N. I. Vorob'ev ◽  
V. V. Pechkovskii ◽  
A. I. Komyak
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum

The infrared absorption spectrum of 18O-labelled nitrobenzene

1964 ◽  
Vol 20 (2) ◽  
pp. 179-185 ◽  
Author(s):  
S. Pinchas ◽  
D. Samuel ◽  
B.L. Silver
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum
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