XXXVII.—Note on an apparatus for fractional distillation under reduced pressures

An apparatus for studying scintillator properties at high isostatic pressures.

We describe the design and operation of a unique hydraulic press for the study of scintillator materials under isostatic pressure. This press, capable of developing a pressure of a gigapascal, consists of a large sample chamber pressurized by a two-stage hydraulic amplifier. The optical detection of the scintillation light emitted by the sample is performed, through a large aperture optical por...

A steam distillation apparatus suitable for micro-Kjeldahl analysis.

On the glass temperature under extreme pressures.

The application of a modified Simon-Glatzel-type relation [Z. Anorg. Allg. Chem. 178, 309 (1929)] for the pressure evolution of the glass temperature is presented, namely, Tg(P)=Tg0[1+DeltaP/(pi+Pg0)]1/bexp[-(DeltaP/c)], where (Tg0,Pg0) are the reference temperature and pressure, DeltaP=P-Pg0, -pi is the negative pressure asymptote, b is the power exponent, and c is the damping pressure coeffic...

Reduced distillation models via stage aggregation

A method for deriving computationally efficient reduced nonlinear distillation models is proposed, which extends the aggregated modeling method of Lévine and Rouchon (1991) to complex models. The column dynamics are approximated by a low number of slow dynamic aggregation stages connected by blocks of steady-state stages. This is achieved by simple manipulation of the left-hand sides of the dif...

An evaluation of wedge pressures in dogs under conditions of normal and elevated pulmonary vascular pressures.

Fifty-six combined right and left heart catheterizations in normal dogs and clogs with experimental mitral stenosis failed to show a significant positive correlation between pulmonary artery wedge pressure and pulmonary vein pressure when the latter was below approximately 17 mm. Hg. Evidence is presented which suggests that the wedged catheter outlets are totally occluded in many instances in ...