Now showing items 21-30 of 58
Infrared spectrum and crystal structure of cellulose
(Interscience Publishers, Inc.Wiley Periodiocals, Inc., 1957-07)
Infrared absorption spectra of oriented cellulose fibers have been observed using polarized radiation. Natural fibers are in general too thick but swelling them in NaOH solution followed by pressing, washing, and drying ...
"Salting-out" chromatography: Empirical equations relating RF values to atomic refraction constants
(Elsevier, 1957-10)
Peptides, [alpha]-amino acids and miscellaneous organic compounds were chromatographed on filter paper using saturated ammonium sulfate solution as the developing solvent. Equations relating RF values to molecular refraction ...
Infrared spectra of high polymers. V. Polyvinyl alcohol Presented in part at the Symposium on Molecular Structure and Spectroscopy, Columbus, Ohio, June 1956.
(Interscience Publishers, Inc.Wiley Periodiocals, Inc., 1956-11)
The infrared spectrum of polyvinyl alcohol has been investigated between 3600 and 70 cm. −1 . Polarization measurements on stretched specimens were made down to about 330 cm. −1 . The spectrum of a deuterated specimen ...
Hysteresis of contact angle of water on paraffin. Effect of surface roughness and of purity of paraffin
(Elsevier, 1953-04)
The experimental results show that when very thin films of purified paraffin were formed in vacuum by volatilization on smooth glass surfaces and water drops were placed upon them, the advancing and the receding contact ...
The metabolism of Brucellae: The nature of the effects of pH and concentration on the rate of oxidation of succinate
(Elsevier, 1956-10)
The sharp rise in the rate of oxidation of succinate by Brucella abortus that occurs with gross increases in hydrogen ion or the substrate concentration was accompanied by an even greater degree of increase in the rate of ...
The infrared and Raman spectra of the pentafluoroethyl halides
(Elsevier, 1959)
The infrared spectra of the pentafluoroethyl halides have been investigated in the gaseous state with double-beam prism spectrometers using NaCl and CaF2 prisms, and the Raman spectra of the compounds have been obtained ...
Polyelectrolyte behavior of glycerol-treated psoas fibers This work was supported by grant No. RG-4917 from the U. S. Public Health Service.
(Interscience Publishers, Inc.Wiley Periodiocals, Inc., 1959-12)
Glycerol-treated psoas fibers lengthen when transferred from distilled water to 0.01 M barbital at pH 3.3. The addition of electrolyte then causes a considerable shortening, depending primarily on the charge of the anion. ...
Peptic hydrolysis of ovalbumin modified by acetylation,
(Elsevier, 1957-09)
1. 1. Two types of acetylated ovalbumin derivatives designated as N-and N,O-acetylovalbumin were prepared by treatment with ketene at pH's 5.6 and 9.0, respectively.2. 2. Both limited and extensive acetylation decreases ...
A method for the determination of guanidoacetic acid and arginine in biological fluids,
(Elsevier, 1959-12)
A method for the determination of either arginine or guanidoacetic acid or both in biological materials has been presented. The method is based on the chromatographic separation of arginine from guanidoacetic acid and the ...