Effect of density

Philipsen P H T, te Velde G and Baerends E J 1994 The effect of density-gradient corrections for a molecule-surface potential energy surface. Slab calculations on Cu(100)c(2x2)-C0 Chem. Phys. Lett. 226 583... 

Fig. 3. Effect of density on compressive modulus of rigid cellular polymers. A, extmded polystyrene (131) B, expanded polystyrene (150) C-1, C-2, polyether polyurethane (151) D, phenol—formaldehyde (150) E, ebonite (150) E, urea—formaldehyde (150) G, poly(vinylchloride) (152). To convert...

Fig. 9. Effect of density, where d is density as compacted and is density as siatered, for (a) particle size and (b) compacting pressure.

Fig. 3. Effect of density on thermal conductivity. A, 48-mg/cm siUca fiber B, 96-mg/cm siUca fiber C, 128-mg/cm alumina—siUca fiber D, 192-mg/cm ...

A turbine flowmeter consists of a straight flow tube containing a turbine which is free to rotate on a shaft supported by one or more bearings and located on the centerline of the tube. Means are provided for magnetic detection of the rotational speed, which is proportional to the volumetric flow rate. Its use is generally restric ted to clean, noncorrosive fluids. Additional information on construction, operation, range, and accuracy can be obtained from Holzbock (Instruments for Measurement and Control, 2d ed., Reinhold, New York, 1962, pp. 155-162). For performance characteristics of these meters with liquids, see Shafer,y. Basic Eng., 84,471-485 (December 1962) or May, Chem. Eng., 78(5), 105-108 (1971) and for the effect of density and Reynolds number when used in gas flowmetering, see Lee and Evans, y. Basic Eng., 82, 1043-1057 (December 1965). 

Figure 10.7. Effect of density and melt flow index on elongation at break. (Separation rate 45 em/min on specimen of 1 in gauge length.) A, constant density (0.92 g/cm ). B, constant MFI (0.7). C, constant density (0.94 g/cm ). (Reproduced by permission of ICI)...

Fig. 27. The effect of density on the predicted tensile failure probability distribution for grade H-451 graphite.

The effect of density of the air or gas entering the suction of the second (and/or third, etc.) fan is significant for high-pressure units operating individually above about 15 in. of water static. The static pressure rise in the second fan corrected for suction pressure is as follows, neglecting losses. ... 

Fig. 8-8 Effect of density and MI changes on the properties of polyethylene, with properties increasing in the direction of the arrows.

Wang C. H., Wright R. B. Effect of density on the Raman scattering of molecular fluids. I. A detailed study of the scattering polarization, intensity, frequency shift, and spectral shape in gaseous N2, J. Chem. 

Hasegawa, T. and Nishikado, K., Effect of density ratio on flame propagation along a vortex tube. Proceedings of the Combustion Institute, 26, 291-297, 1996. 

A final comment has to do with the concept of effective viscosity In strongly Inhomogeneous fluids. For these systems the definition of the effective viscosity depends on the type flow, hence different effective viscosities will be measured for different flow situations In the same system with the same density profile. Therefore, the effective viscosity Is a concept of limited value and measurements of this quantity do not provide much information about the effects of density structure on the flow behavior. 

Coppola D.M. and Vandenbergh J.G. (1985). Effect of density, duration of grouping and age of urine stimulus on the puberty delay pheromone in female mice. J Reprod Fertil 73, 517-522. 

Jorgensen, K., Ipsen, J. H., Mouritsen, O. G., Bennett, D. and Zuckermann, M. J. (1991). The effects of density fluctuations on the partitioning of foreign molecules into lipid bilayers application to anaesthetics and insecticides, Biochim. Biophys. Acta, 1067, 241-253. 

On the other hand, if the first and third terms on the right-hand side of Eq. (55) are small (which is true for highly viscous liquids), the density still appears in the equation and its increase results in a decrease in the bubble volume. This situation is applicable to the experiments of Davidson and Schuler (D8). Since no data are reported which pertain to the effect of density alone, a comparison is not possible. 

A study was made of the effect of density of injection moulded, thin-walled, integral foam products made of propylene copolymers, containing 20% PE, on their low-temperature properties. Results are discussed and evaluated. 5 refs. 

The extension of target molecules from those in the gas phase to the condensed phase to investigate the effect of density on the cross sections [5]. The extension to clusters and transient species such as radicals is also important. 

The paper of Gordon describes a model for diffusion-controlled reaction based on the "hole concept in liquids of Jost (Ref 1, p 459). in which the activation energy for diffusion is equated simply to pV. The marked effect of density, therefore, results from the strong dependence of pressure on density (p varying about as the density cubed) and the appearance of this factor in an exponential term. On this basis, Gordon derived an approximate expression for dependence of detonation velocity D on explosive density pQ. This equation is given on pp 833 and 836 of Gordon s paper. From this expression the critical diameter dc for composite explosives is related to an exponential function of density by ... 

Gordon (Ref 8) attributes the effect of density to its strong influence on the detonation pressure. The log of the diffusion coefficient is approximately proportional to the inverse cube of the density. Thus, in composite explosives the reaction slows... 

Effect of densities on deton velocities) 5) CM. Mason F.C. Gibson, "Research Program on Detonation and Explosives Phenomena , USBur-MinesProgrRept No 10, Oct-Dec (1955), Army Pro j 504-01-015, OrdnCorpsProj TA3-5101 6) Cook... 

Table 3.1 The effect of density on the velocity of detonation for the primary...

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