Walburga Kullmann

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Linear estimation theory incorporating statistical a priori knowledge is applied to the inverse problem of reconstructing a static 3-D vector source field from another 3-D vector measurement field. The motivation for this development is to reconstruct 3-D electric current distributions from a set of magnetic measurements. Such a capability would be useful(More)
A pilot study on the Yakovlev Collection in Washington, D.C. was carried out in September/October, 1977, to determine its suitability for morphometric documentation of the growth of the human brain and its structural components. The Yakovlev Collection contains complete serial sections of approximately 800 human brains which are practically unexplored with(More)
This study of protease-catalyzed peptide synthesis reports the preparation of the COOH-terminal octapeptide amide of cholecystokinin. The octapeptide was assembled by chemical condensation of two tetrapeptide segments that had been synthesized through the concerted catalytic reactions of several proteases of different specificities. The resulting(More)
Two alternative pathways leading to protease-mediated syntheses of Leu- and Met-enkephalin are described. Each peptide bond of the opiate peptides was formed by either papain, or alpha-chymotrypsin catalysis. N alpha-t-Butyloxycarbonyl amino acids and peptides or their esters served as carboxyl components, whereas amino acid and peptide phenylhydrazides(More)
The proteinase-catalysed synthesis of [Leu]enkephalin and [Met]enkephalin was studied kinetically. N alpha-t-Butoxycarbonyl-amino acids and peptides or their ethyl esters served as acyl donors, and amino acid phenylhydrazides were used as acyl acceptors. Initial-velocity measurements of alpha-chymotrypsin-catalysed peptide synthesis gave rise to kinetic(More)
The dilatometer method was used to study the linear polymerization shrinkage of five different composite filling materials which, although of similar composition, are available in both the self-curing and the light-curing form. The shrinkage of these materials has been recorded for 5 minutes after setting was initiated. While rapid length changes occurred(More)