Prof. Dr. Dr. h. c. Fritz Feigl zum 70. Geburtstag

Ohne Zusammenfassung     

60th Birthday of Prof. Dr. Dr. h.c. Heino Finkelmann

This section contains news of the macromolecular community all over the world. Articles about, for example, people, projects, and market trends are welcome. Suggestions should be sent to the editorial office of the Macromolecular journals, preferably by E‐mail to macromol@wiley‐vch.de. The editorial office decides which articles will be published.     

Herrn Professor Dr. Dr. h. c. mult. J. F. K. Huber

Ohne Zusammenfassung     

Prof. Dr., Dr. H. C. Wilhelm Klemm zum 60. Geburtstag

Ohne Zusammenfassung     

A post-column enzyme reactor for detection of oxidized cholesterols in h.p.l.c. separations

An enzyme reactor is used as a post-column detector after the h.p.l.e. separation of a mixture of cholesterol and some auto-oxidation products. The enzyme reactor contains cholesterol oxidase immobilized on controlled-pore glass. A method for purification of the enzyme is described. The properties and the solvent dependence of the reactor are discussed. A post-column system for dilution of the eluent with aqueous buffer is described.     

Energy-band structure for triplet excitons in space group c 52h

The triplet exciton energ-band structure for organic molecular solids belonging to space group C_2h⁵ containing in general four molecules at arbitrary positions in the unit cell is derived in the restricted Frenkel limit for the principal symmetry directions in the zone. The dispersion relations can be obtained without a priori assumptions on the relative strengths of the transfer matrix elements between the different sublattices. The band structure of crystals of current experimental interest like pyrene and 1,4-dibromonaphthalene is discussed.     

In Honor of Prof. Dr. Dr. hc Rainer Streubel

Rainer Streubel's significant contribution to the field of low-valent phosphorous chemistry has had a great impact on the field. This special collection was assembled to honor Prof. Streubel on the occasion of his retirement. The central theme is the beauty of inorganic chemistry.     

Die Elektronenstruktur des Dicyclohepta[c d,g h]pentalens

Dicyclohepta[cd, gh]pentalene is shown by ESR.- and NMR.-spectroscopic evidence to be best represented as a perturbed [14] annulene. The orbital interaction between the π-perimeter and the ethylene-“bridge” is discussed.     

Elementary Dr. Watson

J. D. Watson in his book, The Double Helix, blamed J. N. Davidson’s text The biochemistry of nucleic acids for Watson initially using the wrong formulae of the nitrogenous bases in his and F. Crick’s quest for the DNA structure. A closer look at Davidson’s text, however, reveals that most of the structures were correctly drawn the only exception being guanosine represented in the enol form.