Symmetry-relations and dynamics of molecular crystals in the long wave limit

Symmetry relations for macroscopic constants are derived. Especially it is shown that the Voigt-symmetry holds for the indices of the elastic constants. This has been doubted several times for lattices of particles with additional degrees of freedom. In the second part a simple model for Br₂- and J₂-lattices is discussed. The intermolecular forces are assumed to be van-der-Waals-forces. The influence of the internal degrees of freedom on lattice dynamics is calculated especially for the elastic constants. Further the limiting frequencies forq?0 are given and compared with experimental values.     

Glykogengenalt und UDP-Glucose-Glucanglucosyltransferaseaktivit?t normaler menschlicher Lymphocyten

Ohne Zusammenfassung     

Eine schnelle Bestimmung von Thymidylat-Synthetase

Ohne Zusammenfassung     

Bestimmung von Lipiden in Fischmehl

Ohne Zusammenfassung     

Schnellbestimmung der Cholinesterase

Ohne Zusammenfassung     

Die Bestimmung einiger abnormer H?moglobine

Ohne Zusammenfassung     

Mictomagnetism in V—Fe

Low field a.c. susceptibility measurements on several VFe alloys near 28 at.% Fe reveal that the magnetic state of these alloys depends strongly on the degree of atomic short-range order. With decreasing Fe concentration or increasing degree of atomic short-range order the alloys display a sudden change from ferromagnetism to mictomagnetism.     

High resolution dye laser spectrometer for measurements of isotope and isomer shifts and hyperfine structure

A high resolution cw dye laser spectrometer with a frequency calibration system of 100 kHz resolution is described. Two examples of measured isotope shifts will be discussed.