Weissenbergn.

/ˈvʌɪsənbəːɡ/

Etymology: < the name of Karl Weissenberg (1893–1976), Austrian-born physicist.

a. Crystallography. Used attributively with reference to a technique of single-crystal X-ray diffraction introduced by him, in which a metal shield allows the diffracted X-rays to produce only one set of parallel lines of spots which are recorded over the whole of the photographic film by rotating it synchronously with the crystal, enabling the Miller indices and other crystal parameters to be easily obtained.

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the world > matter > chemistry > crystallography (general) > [adjective] > X-ray diffraction

Weissenberg1934

1934 W. P. Davey Study Crystal Struct. vii. 205 The Weissenberg camera may be used..in the indexing of diffraction spots which are so thickly clustered on layer lines as to require otherwise a large number of oscillation photographs.

1962 Acta Crystallographica XV. 1106/1 Rotation and Weissenberg photographs of the artificial CuIO₃(OH)..indicate that it is identical with salesite in cell dimensions and the distribution of intensities.

1976 D. Sherwood Crystals, X-rays & Proteins xiv. 507 To obtain full three-dimensional information, we may take a series of photographs corresponding to each layer line in which we are interested. This was realised by K. Weissenberg, and in 1924, he published an experimental method which enables this to be done. This is now known as the Weissenberg method.

b. Weissenberg effect n. Physics an effect observed when a visco-elastic liquid is stirred, when the liquid rises in the centre and climbs the stirring rod rather than forming a concave surface like normal fluids.

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the world > matter > chemistry > physical chemistry > viscosity > [noun] > visco-elasticity > effects

Weissenberg effect1949

1949 M. Reiner et al. in Jrnl. Soc. Chem. Industry LXVIII. 327/2 When a vertical rod is rotated in certain viscous elastic liquids, the liquid climbs up the rod and when a disc is rotated in such a liquid near the bottom of a beaker containing it, the liquid is drawn radially towards the centre... Freeman and Weissenberg claim that the first experimental observations were made by Weissenberg and Russell... In view of this it would seem justifiable to describe such phenomena as ‘the Weissenberg Effect’.

1978 Sci. Amer. Nov. 148/2 If you would like to produce the Weissenberg effect, you might use a mixing bowl mounted on a turntable.

This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022).

单词	weissenberg
释义	Weissenbergn. /ˈvʌɪsənbəːɡ/ Etymology: < the name of Karl Weissenberg (1893–1976), Austrian-born physicist. a. Crystallography. Used attributively with reference to a technique of single-crystal X-ray diffraction introduced by him, in which a metal shield allows the diffracted X-rays to produce only one set of parallel lines of spots which are recorded over the whole of the photographic film by rotating it synchronously with the crystal, enabling the Miller indices and other crystal parameters to be easily obtained. ΘΚΠ the world > matter > chemistry > crystallography (general) > [adjective] > X-ray diffraction Weissenberg1934 1934 W. P. Davey Study Crystal Struct. vii. 205 The Weissenberg camera may be used..in the indexing of diffraction spots which are so thickly clustered on layer lines as to require otherwise a large number of oscillation photographs. 1962 Acta Crystallographica XV. 1106/1 Rotation and Weissenberg photographs of the artificial CuIO₃(OH)..indicate that it is identical with salesite in cell dimensions and the distribution of intensities. 1976 D. Sherwood Crystals, X-rays & Proteins xiv. 507 To obtain full three-dimensional information, we may take a series of photographs corresponding to each layer line in which we are interested. This was realised by K. Weissenberg, and in 1924, he published an experimental method which enables this to be done. This is now known as the Weissenberg method. b. Weissenberg effect n. Physics an effect observed when a visco-elastic liquid is stirred, when the liquid rises in the centre and climbs the stirring rod rather than forming a concave surface like normal fluids. ΘΚΠ the world > matter > chemistry > physical chemistry > viscosity > [noun] > visco-elasticity > effects Weissenberg effect1949 1949 M. Reiner et al. in Jrnl. Soc. Chem. Industry LXVIII. 327/2 When a vertical rod is rotated in certain viscous elastic liquids, the liquid climbs up the rod and when a disc is rotated in such a liquid near the bottom of a beaker containing it, the liquid is drawn radially towards the centre... Freeman and Weissenberg claim that the first experimental observations were made by Weissenberg and Russell... In view of this it would seem justifiable to describe such phenomena as ‘the Weissenberg Effect’. 1978 Sci. Amer. Nov. 148/2 If you would like to produce the Weissenberg effect, you might use a mixing bowl mounted on a turntable. This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2022). < n.1934
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