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Digitale Medien

Spectrophotometric Methods for Determination of Sugars (1956)

Timell, T. E. ; Glaudemans, C. P. J. ; Currie, A. L.

s.l. : American Chemical Society

Analytical chemistry 28 (1956), S. 1916-1920

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ISSN: 1520-6882

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/ac60120a030

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Digitale Medien

Formation of Helical Microfibrils from a Steroid Acid Complex (1961)

RAMANATHAN, N. ; CURRIE, A. L. ; COLVIN, J. ROSS

[s.l.] : Nature Publishing Group

Nature 190 (1961), S. 779-781

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The demonstrated helical molecular structure J. of many biological polymers has led to the suggestion that super-helices may be formed from the initial coils and may be resolved in the electron microscope1. The idea is plausible and important since it provides a bridge between molecular chains and ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/190779a0

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Digitale Medien

Application of a molecular precursor to the preparation of tungsten and beta-tungsten nitride coatings and powders (1992)

Currie, A. L. ; Howard, K. E.

Springer

Journal of materials science 27 (1992), S. 2739-2742

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ISSN: 1573-4803

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau

Notizen: Abstract The use of the tungsten imido/amido complex (N-H-t-Bu)2W(N-t-Bu)2 (Complex 1) (CAS number 72207-45-5) as a precursor to tungsten and tungsten nitride films, coatings and powders is reported. The alkane-soluble Complex 1 exhibits high solubility in solvents such as hexane and toluene, making it amenable to application to substrates via dip-coating or spotspraying. This avoids the necessity of vapour deposition methods and the, presently common, use of tungsten fluorides. Thermolysis in an ammonia/nitrogen, ammonia/argon or exclusively nitrogen atmosphere at temperatures between 600 and 1200°C provided a coating or powder comprised of elemental tungsten (75–95 mol%) and tungsten nitride (25-5 mol%). Oxygen content of these materials is less than 0.5%. Thermolysis in an argon atmosphere produced a coating on AIN substrates which were found to contain no β-W2N (as detectable by X-ray diffraction), only tungsten metal. The coating was successfully applied to sintered aluminium nitride electronic and structural substrates. A coated aluminium nitride substrate exhibited improvement in erosion resistance when compared to an uncoated specimen.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00540699

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