S. Henin Versailles, France It was a pleasure for me to take part in the NATO Advanced Study Workshop for studies of 'Soil Colloids and their Associations in Soil Aggregates'. The meeting provided me with a welcome opportunity to renew acquaintances with respected colleagues in the various fields of Soil Science, to listen to their presentations, and be involved in discussions which were at the frontiers of the science which deals with the structures and the associations of the soil colloidal constituents. In my view the rapid advances in Soil Science, and the great benefits to agriculture...

A selection of 19 papers from an international conference in Gnstow, (then) East Germany, June 1990. They discuss the application of computer methods to the exploration and exploitation of oil and gas, coal, and other energy and mineral resources. Among the topics are differential compaction and str

Focusing on the potential use in biotechnology of microorganisms that seem perfectly content in temperatures that would fry most of life as we know it, reviews aspects of ecology and isolation, taxonomy, physiology and metabolism, molecular biology and genetics, and cell structure of the Thermus str