Experimental interactions of Slovak bentonites with metallic iron

Persorption of metallic iron particles.

Large, solid, undissolved food particles instantly enter the body from the intestinal lumen. We examined this phenomenon which we called 'persorption'. Such large particles are kneaded between the cells into the subepithelial region through the epithelial cell layer. Transport from the intestinal wall is via the portal system and by means of the chyle (Fig. 1). Starch granules with a diameter r...

An experimental study of the formation of metallic iron in chondrules

The abundance of metallic iron is highly variable in different kinds of chondrites. The precise mechanism by which metal fractionation occurred and its place in time relative to chondrule formation are unknown. As metallic iron is abundant in most Type I (FeO-poor) chondrules, determining under what conditions metal could form in chondrules is of great interest. Assuming chondrules were formed ...

Metallic Iron in Meteorites as a Sensitive Tracer of Surface-volatile Interactions on Mars

Introduction: Meteorites on Mars (martian finds) are more than curiosities. They may provide a means to gauge the past and recent extent of water exposure across the martian latitudes. The many roles of water in solid, liquid, and vapor phases pose a set of outstanding questions relating to the geologic history and habitability of Mars. Because we are looking for evidence of trace amounts of wa...

Magnetic moment of iron in metallic environments

Rare-earth iron nitrides are emerging as an important class of magnetic materials. In certain rare-earth iron compounds, the insertion of small atoms such as nitrogen and boron has resulted in significant changes in the magnetic properties in the form of higher Curie temperatures, enhanced magnetic moments, and stronger anisotropies. In an attempt to understand some of the above, we have focuse...

Coupled chemical-hydraulic-mechanical behaviour of bentonites