African Linguistics in Central and Eastern Europe, and in the Nordic Countries

Non peer reviewe

Type I restriction enzymes and their relatives

Type I restriction enzymes (REases) are large pentameric proteins with separate restriction (R), methylation (M) and DNA sequence-recognition (S) subunits. They were the first REases to be discovered and purified, but unlike the enormously useful Type II REases, they have yet to find a place in the enzymatic toolbox of molecular biologists. Type I enzymes have been difficult to characterize, but this is changing as genome analysis reveals their genes, and methylome analysis reveals their recognition sequences. Several Type I REases have been studied in detail and what has been learned about them invites greater attention. In this article, we discuss aspects of the biochemistry, biology and regulation of Type I REases, and of the mechanisms that bacteriophages and plasmids have evolved to evade them. Type I REases have a remarkable ability to change sequence specificity by domain shuffling and rearrangements. We summarize the classic experiments and observations that led to this discovery, and we discuss how this ability depends on the modular organizations of the enzymes and of their S subunits. Finally, we describe examples of Type II restriction–modification systems that have features in common with Type I enzymes, with emphasis on the varied Type IIG enzymes

Synthesis and structure of new lanthanoids and mercury complexes with polyfunctional ligandsystems

In dieser Arbeit wird anhand des dppaS2-Ligandensystems und seiner Derivate gezeigt, wie sich polyfunktionelle Ligandensystem zum gezielten Aufbau ein- und mehrkerniger Komplexe der Seltenen Erden und des Quecksilbers nutzen lassen. Hierbei kann das Ligandensystem als Chelat- und Brückenligand fungieren. Ferner zeigt die Arbeit Beispiele für die Verwendung von Thiocyanaten als Brückenliganden zur Synthese von polynuklearen, Homo- und Heterometallkomplexen. Die dargestellten Verbindungen wurden mit Hilfe der Einkristall-Röntgenstrukturanalyse strukturell charakterisiert

Editor's Preface

Editor's preface to the third volume of the Proceedings of the Second International Congress of Somali Studies ("Aspects of development"), hosted at the University of Hamburg from 1st to 6th of August, 1983.Hordhacii tifaftiraha buugga saddexaad ee maqaallada shirweynaha caalamiga ee Daraasaadka Soomaaliyeed, oo lagu qabtay Jaamacadda Hamburg (1-6 agosto 1983)Prefazione del curatore al terzo volume degli Atti del Secondo Congresso Internazionale di Studi Somali ("Aspects of development"), tenuto presso l'Università di Amburgo dal 1 al 6 agosto 1983.Labahn, Thomas (ed.

Consumer Behaviour as an Indicator of Income Structures

A survey on the discrepancy between low wages and purchase patterns of Somali people, with a special reference to markets and to Maka-al-Mukarama, one of the major shopping roads in Mogadishu._-_Baaritaan ku saabsan farqiga weyn ee u dhexeeya dakhliga yar iyo caadada wax iibsashada soomaaliyeed, iyadoo laga shidaalqaadanayo suuqyada iyo Maka Mukarrama, oo ah mid ka mid ah waddooyinka ganacsi ee ugu waaweyn ee Moqdisho._-_Indagine sulla discrepanza rilevata tra basso reddito e abitudini d'acquisto dei somali, con particolare riferimento ai mercati e a Maka-al-Mukarama, una delle principali vie commerciali di Mogadiscio.Puglielli A. (a cura di

Editor's Preface

Editor's preface to the second volume of the Proceedings of the Second International Congress of Somali Studies ("Archaeology and History"), hosted at the University of Hamburg from 1st to 6th of August, 1983.Hordhacii tifaftiraha buugga labaad ee qoraalladii shirweynaha caalamiga ee Cilmibaarista soomaaliyeed ("Degelbaaris iyo taariikh"), oo lagu qabtay Jaamacadda Hamburg 1-6 ogost 1983.Prefazione del curatore al secondo volume degli Atti del Secondo Congresso Internazionale di Studi Somali ("Archaeology and History"), tenuto presso l'Università di Amburgo dal 1 al 6 agosto 1983.Thomas Labahn (ed.