Materials Literature
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Presents theoretical calculations and experimental observations on electron scattering by gases in the specimen chamber of a scanning electron microscope. The observed scattering is in good agreement with theoretical calculations based on elastic and inelastic electron scattering. For normal surface inspection work, g…
Based on the energy retardation power formula concerning the penetration and the energy loss of an electron probe into solid targets, the secondary electron emission yield delta due both to primary and back-scattered electrons is derived as functions of three parameters such as atomic number Z, first ionisation energy…
The optical transmittance of thin PdO films has been measured in the range 0.5-5.4 eV. From these data the optical constants have been determined by Kramers-Kronig analysis. A small band gap (0.8 eV) and a high dielectric constant (8.0) have been found.
Abstract Polyäthylen hoher Dichte (HD‐PE), Polyvinylchlorid (Weich‐PVC) und schlagzähes Polystyrol (HI‐PS), die 3 H‐markierte Additive enthielten, standen mit 14 C‐markierten Tricaprylin in Kontakt. Das Eindringen des Tricaprylins in die verschiedenen Kunststoffe und das gleichzeitige Auswandern der Kunststoffadditive…
Abstract The ability of potassium permanganate to induce graft copolymerization of acrylonitrile (AN) onto starch was investigated. The graft yield depends on monomer and initiator concentrations as well as reaction time and temperature. Chemical analysis of the reaction product of starch and (AN) in presence of potas…
Magnetic resonance measurements on a spinning sample of deuterated $n$-heptyloxyazozybenzene (HOAB-${d}_{30}$) are presented. The resulting spectral patterns for the deuterated terminal methyl groups display the biaxial character of the smectic-$C$ phase. Values for those biaxial order parameters which survive under f…
We report on the first successful double-scattering low-energy electron diffraction experiment, which clearly reveals spin-polarization effects. Polarization and intensity of the specular beam from W(001) have been measured as functions of the azimuthal angle of incidence ("rotation diagrams"). The agreement of the da…
Using Faraday's Law, one can calculate the weight of aluminum oxidized and a theoretical film thickness.
Abstract Massenspektroskopische Gleichgewichtsmessungen führten für homogene Gasgleichgewichte bei 298 K zu folgenden Ergebnissen: Für die Bildung von AScCl 4 (A = Li … Cs), NaMgCl 3 , MgScCl 5 und KGaCl 4 nach der allgemeinen Gleichung magnified image ist Y eine Funktion der Elektronegativitätsdifferenz von A und B.
Abstract Metastable SrSiO3 was formed during the course of the solid state reaction of SrCO3 and SiO2. The reaction mechanism was investigated by means of DTA and X-ray diffraction analysis. It was found that stable SrSiO3 is formed via two processes: (a) transformation of metastable into stable SrSiO3; (b) solid stat…
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We have selectively deuterated the sidechain of the synthetic polypeptide poly(-γ-benzyl-L-glutamate), PBLG. In magnetically oriented nematic solutions of PBLG, the helical polymer rods are aligned parallel to the field. The Brownian motion of the flexible PBLG sidechain is anisotropic, resulting in quadrupole splitti…
A classification was given of the instabilities appearing in nematic, cholesteric, and smectic liquid crystals exposed to an electric or magnetic field. The basis of the classification is a type of the torque which destabilizes the distribution of molecular axes (director L). It was shown that the explanation of pract…
Article On the Anomalous Self-Diffusion in ß-Zirconium: Temperature Dependence of the Isotope Effect was published on April 1, 1979 in the journal International Journal of Materials Research (volume 70, issue 4).
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Hubert F. A. Tschunko, "Apodization and image contrast," Appl. Opt. 18, 955-956 (1979) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation al…
A study of ($p$,$\mathrm{xn}$) and ($p$,$\mathrm{pxn}$) reactions on $^{79}\mathrm{Br}$ and $^{81}\mathrm{Br}$ was made. The excitation functions were measured in the energy range 10-85 MeV. The excitation functions experimentally obtained were compared with those predicted by intranuclear cascades and two pre-equilib…
Abstract Effect of specimen orientation, heat treatment and applied potential on the stress corrosion susceptibility of magnesium AZ61 (Mg‐6.3% Al‐0.5% Zn‐0.20% Mn) alloy in an aqueous 3.5% NaCl + 2% K 2 CrO 4 solution at room temperature was investigated. Stress corrosion times to failure were measured at different v…
Abstract Methods for the elucidation of the chemical components of polyurethane foams are described. Foam samples of 50 mg were hydrolyzed in aqueous base and the resulting mixture of polyols and polyamines was analyzed by chemical ionization mass spectrometry (CI‐MS) and high‐pressure liquid chromatography (HPLC). Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition of aluminum alkoxidesGottfried Brieger, Stephen W. Watson, Donald G. Barar, and Anita L. SheneCite this: J. Org. Chem. 1979, 44, 8, 1340–1342Publication Date (Print):April 1, 1979Publication History Published online1 May 2002Published inissue 1 April 19…
Experimental values are reported for the elastic constants of a number of Schiff's bases. The ratio K33/K11 is found to decrease with increasing alkyl chain length. The results indicate that the elastic constants are related to the molecular dimensions and can be understood qualitatively in terms of the theory of Prie…