TY - JOUR TI - Phase Transitions in Two-Dimensional Lattice Gases of Hard-Core Molecules with Long-Range Attractions AU - Hall, Carol K. AU - Stell, George T2 - Physical Review A AB - We have investigated the phase behavior that results when an infinitely weak and long-range attractive potential is added to the following hard-core lattice gases: the triangular-lattice gases with exclusions up to first, second, third, and fourth neighbors, and the square-lattice gases with exclusions up to first, second and third neighbors. Three of the systems considered have realistic (i.e., argonlike) phase diagrams, complete with a first-order solid-fluid phase change, a first-order liquid-gas phase change (with a critical point), and a triple point. Three other systems have a first-order solid-fluid phase change. The remaining system has a first-order liquid-gas phase change along with a higher-order transition that is not of the typical solid-fluid type. We find that when the hard-core system has a second-order or first-order phase change to begin with, the addition of the attractive potential spreads the transition out into a first-order phase change with temperature-dependent coexistence densities that bracket the density at which (or density interval over which) the original transition takes place. We also find that the presence or absence of realistic phase behavior for the combined system appears to be dependent upon the shape of the hard core as well as its range. DA - 1973/5/1/ PY - 1973/5/1/ DO - 10.1103/physreva.7.1679 VL - 7 IS - 5 SP - 1679-1689 J2 - Phys. Rev. A LA - en OP - SN - 0556-2791 UR - http://dx.doi.org/10.1103/physreva.7.1679 DB - Crossref ER - TY - JOUR TI - Physical properties of sputum. IV. The effects of 100% humidity and water mist. AU - Dulfano, M. J. AU - Adler, K. B. AU - Wooten, O. T2 - American Review of Respiratory Disease DA - 1973/// PY - 1973/// VL - 107 SP - 130-133 ER - TY - JOUR TI - MAMMALIAN RESPIRATORY MUCOCILIARY CLEARANCE AU - ADLER, KB AU - WOOTEN, O AU - DULFANO, MJ T2 - ARCHIVES OF ENVIRONMENTAL HEALTH AB - An in vivo model was designed to provide information on the major factors affecting mammalian mucociliary clearance. It involves simultaneous quantitation of mucous load, tracheal transport velocity, ciliary beat frequency, and rheological properties of mucus. Values in 23 cats were obtained. The results were remarkably consistent for the group as well as for individual cats that were reexamined. The mucous blanket depth measures usually < 10μ, ciliary beat frequency averages 876±151 beats per minute, and transport rate 10.5±3.7 mm/min. Average mucous viscosity was 248±106 poises at a shear rate of 1 sec-1 and recoverable shear strain (elasticity) 3.1±1.1 units at 100 dynes/sq cm. It is suggested that this model can serve as a sensitive indicator of early deleterious effects of airway pollution or noxious inhalants and pinpoint the initial target area. DA - 1973/// PY - 1973/// DO - 10.1080/00039896.1973.10666403 VL - 27 IS - 6 SP - 364-369 SN - 0003-9896 ER -