Suction at the ready

Ventricular diastolic suction at normal arterial pressures.

It has been shown previously that an empty ventricle can suck in a small amount of fluid during diastole, but the question of whether a normal ventricle does so was not answered. In the present experiments it was demonstrated that even a ventricle with a more nearly normal endsystolic residual volume draws blood into its cavity and that this ventricular vis a fronte is augmented by the action o...

The ALICE HMPID detector ready for collisions at the LHC

ALICE has been specifically optimized to study heavy-ion collisions at the LHC, up to a charged particle density of 8000 per unit of rapidity in central heavy-ion collisions at √ sNN = 5.5 TeV. The High Momentum Particle Identification Detector (HMPID) has a proximity focusing geometry with a liquid C6F14 Cherenkov radiator coupled to Multi-Wire Pad Chambers (MWPC) equipped with CsI photocathod...

Trials at the ready: preparing for the next pandemic.

Ever at the ready for events that never happen

Stress, whether daily stress, work stress or traumatic stress, is unhealthy. This lecture covers three recent theoretical approaches in explaining the mechanisms underlying the influence of psychological stress on somatic health. It is argued that stress research should focus less on stressors themselves and put more emphasis on prolonged stress responses. Three mechanisms are identified that c...

Ventricular suction in the turtle.

In two different experimental environments the isolated turtle ventricle was found to fill and eject blood in the absence of a positive filling pressure. It is concluded that the ventricle can "suck" fluid using energy liberated from its wall during diastole. T HE question of ventricular "suction," that is "Does energy derived from the ventricle contribute to its filling in diastole?" has been ...