Kenneth R. Hall

Another Hard‐Sphere Equation of State

A basic form for a Pade approximant of the hard‐sphere equation of state is proposed. This form incorporates both high and low density limiting behavior and can easily be extended to include any further virial coefficients as they are calculated. Furthermore, addition of a simple term converts the approximant into an accurate equation for hard‐sphere fluids. Hard‐sphere solid behavior can also be estimated using a modification of the approximant, although the results are not as satisfactory as those of the high density hard‐sphere equation of state.

Effect of Plasma Constituents on Oxygen Diffusivity

Oxygen transport in the lungs from the alveoli to the hemoglobin is affected by a number of resistances: the pulmonary membrane, plasma, the red blood cell membrane, and the paracrystalline material inside the red blood cell (Figure 1). The pulmonary membrane which separates the alveolar gases from the blood stream consists of three parts: a thin alveolar membrane, interstitial fluid, and the capillary wall (44). The thickness of the total membrane is a few microns, and is, essentially, an aqueous medium. Plasma is an aqueous solution containing dissolved proteins, inorganic salts, and solutes of diverse organic compounds other than protein (54). The red blood cell consists of a biological semipermeable membrane surrounding a concentrated hemoglobin solution.

Enthalpies of solution in complex systems: albumin + KCl(aq), polystyrene + toluene, and polystyrene + carbon tetrachloride

Abstract Enthalpies of solution and dilution have been measured for three complex systems: albumin + KCl(aq), polystyrene + toluene, and polystyrene + carbon tetrachloride. Mixtures of albumin + KCl(aq) were studied at 298.15 and 310.15 K while the other mixtures were investigated only at 298.15 K.

Improved techniques for extracting enthalpies of mixing from calorimetric data

Abstract Two techniques are suggested for obtaining enthalpies of mixing or dilution. The first technique improves the precision of the results for systems with rapid thermal effects while the second technique is particularly applicable to systems with slow thermal effects, reducing the experimental time significantly.