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Digitale Medien

Global and seasonal variability of the temperature and composition of the middle atmosphere (1985)

Barnett, J. J. ; Corney, M. ; Murphy, A. K. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 313 (1985), S. 439-443

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

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

Notizen: [Auszug] The Stratospheric and Mesospheric Sounder on board the experimental meteorological satellite Nimbus 7, launched in 1978, was designed to study the global structure, radiative properties, chemistry and dynamics of the stratosphere and mesosphere. The instrument obtained data over a four and a half ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/313439a0

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Digitale Medien

Strength loss in E-glass fibres after exposure to organic acids (1985)

Jones, R. L. ; Chandler, H. D.

Springer

Journal of materials science 20 (1985), S. 3325-3328

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ISSN: 1573-4803

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau

Notizen: Abstract The corrosion of E-glass fibres has been investigated in aqueous solutions of selected organic acids. Although most organic acids have very little corrosive effect, oxalic acid and mesoxalic acid (2-oxopropanedioic acid) are extremely corrosive. The mechanism of the corrosion process appears to be related to three factors: relatively high acidic strength, formation of an insoluble calcium salt, and an ability to form stable complexes with cations present in the glass. This corrosion is extremely important when glass fibre composites are used in conditions where oxidative breakdown (e.g. by electric fields or ultraviolet radiation) of the resin material is likely to occur, as the two most corrosive organic acids are likely breakdown products.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00545202

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Digitale Medien

Strength loss in E-glass fibres after exposure to hydrochloric, hydrobromic and hydriodic acids (1985)

Jones, R. L. ; Chandler, H. D.

Springer

Journal of materials science 20 (1985), S. 3320-3324

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ISSN: 1573-4803

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau

Notizen: Abstract The corrosion of E-glass fibres by hydrochloric, hydrobromic, and hydriodic acids has been investigated by measuring the loss of mechanical strength of the fibres following immersion in solutions of the acids. Corrosion is greatest in hydrochloric acid and least in hydriodic acid. Curves of percentage strength retention against concentration show well-defined minima for hydrochloric and hydrobromic acids, but not for hydriodic acid. This phenomenon has been attributed to complex ion formation by metal ions in the glass with chloride or bromide ions in the corroding solution. Spectroscopic evidence suggests that ferric ions play an important role in the corroding process.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00545201

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