the performance of a forced-liquid vertical tubular loop bioreactor (vtlb), a forced-liquid horizontal tubular loop bioreactor (htlb) and a gas-induced external airlift loop bioreactor (ealb) were compared for production of biomass from natural gas. hydrodynamic characteristics and mass transfer coefficients were determined as functions of design parameters, physical properties of gases as well...

Preserving access to multimedia data over time may prove to be the most challenging task in all things concerning multimedia. Preserving access to data from previous technical generations has always been a rather difficult endeavor, but multimedia data with an almost endless succession of encoding and compression algorithms sets the stakes even higher, especially when not only considering migra...

Serotonin is probably unique among the monoamines in that its effects are subserved by as many as 13 distinct heptahelical, G protein-coupled receptors (GPCRs) and a ligand-gated ion channel family (5-HT3). These receptors are divided into seven distinct classes (5-HT1 to 5-HT7) largely on the basis of their structural, transductional and operational characteristics. While this degree of physic...

The erythrocytic asexual reproduction cycle of Plasmodium falciparum, the most lethal malaria parasite in humans, starts with the invasion of a red blood cell by a merozoite and ends with the release of up to 32 new copies of itself in about 48 hours. A new study reveals that merozoite release is an explosive event ensuring the dispersal of these non-motile parasites for optimal re-invasion of ...

INTRODUCTION The development of pancreatic infection is associated with the development of a deteriorating disease with subsequent high morbidity and mortality. There is agreement that in mild pancreatitis there is no need to use antibiotics; in severe pancreatitis it would appear to be a logical choice to use antibiotics to prevent secondary pancreatic infection and decrease associated mortali...