scholarly journals The Infra‐Red Bands of Hydrogen Peroxide at λ9720 and the Structure and Torsional Oscillation of Hydrogen Peroxide

1941 ◽  
Vol 9 (6) ◽  
pp. 458-462 ◽  
Author(s):  
Lloyd R. Zumwalt ◽  
Paul A. Giguère
Keyword(s):  
Hydrogen Peroxide ◽  
Torsional Oscillation ◽  
Infra Red

scholarly journals The Infra‐Red Spectrum of Hydrogen Peroxide

1950 ◽  
Vol 18 (1) ◽  
pp. 88-92 ◽  
Author(s):  
Paul A. Giguère
Keyword(s):  
Hydrogen Peroxide ◽  
Infra Red

The Effect of Microwave Treatment on the Hydrogen Peroxide Bleaching of Soda-AQ Wheat Straw Pulp

2011 ◽  
Vol 236-238 ◽  
pp. 1307-1312
Author(s):  
Chao Jun Wu ◽  
Chuan Shan Zhao ◽  
Jun Li ◽  
Ke FU Chen
Keyword(s):  
Hydrogen Peroxide ◽  
Wheat Straw ◽  
Fiber Length ◽  
Weighted Average ◽  
Microwave Treatment ◽  
Arithmetic Average ◽  
Peroxide Bleaching ◽  
Bleached Pulp ◽  
Infra Red ◽  
Wheat Straw Pulp

In this paper, the effect of microwave treatment on the hydrogen peroxide bleaching of Soda-AQ wheat-straw pulp was investigated. The results showed that microwave treatment could increase the brightness of the hydrogen peroxide bleached pulp. The fiber coarseness of microwave enhancing peroxide bleached pulp was higher than that of the peroxide bleached pulp. However, the arithmetic average fiber length, the length weighted average fiber length and weight weighted average fiber length of the former was lower than that of the latter. Fourier transform infra-red spectroscopy (FTIR) and X-ray diffraction (XRD) spectra showed that CrI(%) crystallinity of microwave enhancing peroxide bleached pulp was similar as that of the peroxide bleached pulp but all higher than that of the Soda-AQ wheat-straw pulp. N·O′KI infra-red crystalline index of microwave enhancing peroxide bleached pulp were lower than that of the peroxide bleached pulp. The FTIR spectra of lignin showed that the microwave treatment had some influences on the methoxyl and phenolic group in lignin.

HYDROGEN PEROXIDE AND ITS ANALOGUES: VI. INFRARED SPECTRA OF H2O2, D2O2, AND HDO2

1955 ◽  
Vol 33 (3) ◽  
pp. 527-545 ◽  
Author(s):  
Osias Bain ◽  
Paul A. Giguère
Keyword(s):  
Hydrogen Peroxide ◽  
Absorption Spectrum ◽  
Carbon Tetrachloride ◽  
Structural Parameters ◽  
Torsional Oscillation ◽  
Oh Groups ◽  
Overtone Band ◽  
Stretching Vibration ◽  
Isotopic Molecule ◽  
First Time

The absorption spectrum of hydrogen peroxide was re-examined with a prism instrument in the region 1.5 to 25 μ. A pair of well-resolved perpendicular bands arising from torsional oscillation of the OH groups were found centered about 460 and 575 cm.−1. The overtone band at 3.8 μ was shown to be a hybrid with prominent rotational structure and some indications of doubling. Its assignment to the combination ν2+ν6 implies a positive anharmonicity. Four new overtone bands were observed in liquid hydrogen peroxide. The infrared spectrum of deuterium peroxide was measured for the first time in the solid and vapor states. The vapor bands are quite different in appearance from those of hydrogen peroxide. One of the fundamentals, the asymmetric O—D stretching at 2661 cm−1, was resolved sufficiently to allow calculation of the rotational constants of the isotopic molecule. Mixtures of the two peroxides containing around 40% of HDO2 were also investigated; from the results the frequency of the as yet unobserved symmetric modes ν1 and ν2 could be estimated with fair certainty. The O—O stretching vibration at 11μ was too weak to be located definitely in the spectra of the gaseous peroxides. The structural parameters of the H2O2 molecule are now established as follows:[Formula: see text] The O—H and O—D stretching bands were studied in solutions of the three isotopic peroxides in carbon tetrachloride.

Electron Microscopy of Human Gallstones

1971 ◽  
Vol 29 ◽  
pp. 296-297
Author(s):  
C. Wolpers ◽  
R. Blaschke
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Bile Pigment ◽  
X Ray Diffraction ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Follow Up Study ◽  
Infra Red ◽  
Main Components

Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.

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