13 research outputs found
?-D-mannosidase activity in human saliva and rate of production of enzymes by parotid and submandibidar glands
Concentration of metabolites and the regulation of phosphofructokinase and fructose-1,6-bisphosphatase in Saccharomyces cerevisiae
Separation of chitosomes and secretory vesicles from the ?slime? variant of Neurospora crassa
Characterization of a proteinaceous extracellular coat synthesized by the ?slime? variant of Neurospora crassa
Effects of Therapeutic Exercise on Muscle Function following Single-Event Multilevel Surgery in Children with Spastic Lower Limb Monoplegic Cerebral Palsy
Geophysical constraints on the dynamics of spreading centres from rifting episodes on land
Most of the Earth's crust is created along 60,000 km of mid-ocean ridge system. Here, tectonic plates spread apart and, in doing so, gradually build up stress. This stress is released during rifting episodes, when bursts of magmatic activity lead to the injection of vertical sheets of magma — termed dykes — into the crust. Only 2% of the global mid-ocean ridge system is above sea level, so making direct observations of the rifting process is difficult. However, geodetic and seismic observations exist from spreading centres in Afar (East Africa) and Iceland that are exposed at the land surface. Rifting episodes are rare, but the few that have been well observed at these sites have operated with remarkably similar mechanisms. Specifically, magma is supplied to the crust in an intermittent manner, and is stored at multiple positions and depths. It then laterally intrudes in dykes within the brittle upper crust. Depending on the availability of magma, multiple magma centres can interact during one rifting episode. If we are to forecast large eruptions at spreading centres, rifting-cycle models will need to fully incorporate realistic crust and mantle properties, as well as the dynamic transport of magma