Now showing items 41-50 of 58
The effect of polymyxin on plant roots
(Elsevier, 1955-10)
Root growth of young seedlings of barley and other species was substantially inhibited when placed in 5-10 p.p.m. solutions of the antibiotic, polymyxin B. The inhibiting effect was suppressed by simultaneous presentation ...
Selection rules for the vibrational spectra of high polymers
(Elsevier, 1957)
With the aid of the Born cyclic postulate, the selection rules for the vibrational modes of a crystalline polymer and an oriented infinite chain-molecule have been discussed. The necessary conditions for the modes to be ...
Rotation spectrum of methyl alcohol
(Elsevier, 1959)
The rotation spectrum of methanol vapor has been measured from 50 to 457 cm-1. Combining these data with the work of Borden and Barker provides an accurate map of the spectrum to 625 cm-1 together with some provisional ...
Variation of contact angle and structure with molecular length and surface density in adsorbed films of fatty acids
(Elsevier, 1956-02)
Films of fatty acids from 12 to 22 carbons were prepared by adsorption on glass microscope slides from cetane solutions. Variations in density were achieved (1) by using a range of concentrations with a fixed short time ...
The Raman spectra of four isotopic varieties of diborane in the gas phase
(Elsevier, 1958-02)
Raman spectra of the four isotopic species, 11B2H6, 11B2D6, 10B2H6, 10B2D6, in the gas phase have been obtained and interpreted in terms of the D2h bridge model. The results are in agreement with previous interpretations ...
Electric field induced vibration rotation spectrum of H2 and D2
(Elsevier, 1959)
Electric field induced absorption has been observed for some 8 vibration-rotation transitions of H2 and for 7 of D2. An alternating electric field was used to modulate the transmitted intensity. Percentage absorptions as ...
Infrared spectra of high polymers. VII. Polyacrylonitrile Presented in part at the Symposium on Molecular Structure and Spectroscopy, Columbus, Ohio, June 1957.
(Interscience Publishers, Inc.Wiley Periodiocals, Inc., 1958-09)
The infrared spectrum of polyacrylonitrile has been obtained in the extended region of 70 to 3200 cm. −1 Polarized measurements were made on stretched and rolled specimens in the range of 350 to 3200 cm. −1 . An analysis ...
Mammalian tyrosinase: Effect of ions on enzyme action
(Elsevier, 1952-04)
1. 1. The univalent cations Li+, Na+, K+, and NH4+ have no effect on tyrosinase action.2. 2. The anions, fluoride, chloride, acetate, and oxalate, consistently inhibit the tyrosine-tyrosinase and dopa-tyrosinase reactions. ...
Sarcosine oxidase activity of rat liver tissue: Effect of folic acid deficiency and induced hyperthyroidism
(Elsevier, 1952-11)
The sarcosine oxidase content of hepatic tissue from rats made deficient in folic acid was similar to that of normal rats. This is taken as evidence that sarcosine oxidase activity is not dependent upon the presence of ...