Stormer

The application in [24] is to celestial mechanics, in which the reduced problem for consists of the Keplerian motion of planets around the sun and in which the impulses account for interplanetary interactions. Application to MD is explored in [14]. It is not easy to find a reduced problem that can be integrated analytically however. The choice /f = 0 is always possible and this yields the simple but effective leapfrog/Stormer/Verlet method, whose use according to [22] dates back to at least 1793 [5]. This connection should allay fears concerning the quality of an approximation using Dirac delta functions. 

Storax [8046-19-3] Stormer viscometer Storm-water control Stout... 

KU-1 Stormer-type A 100-5,000 -50 external control, usually poor ... 

Stormer (Standard and Digital) A 100-10 -50 none to fair Cannon Instmment, State College, Pa./Thomas Scientific, Swedesboro, N.J. 

OtherRota.tiona.1 Viscometers. Some rotational viscometers employ a disk as the inner member or bob, eg, the Brookfield and Mooney viscometers others use paddles (a geometry of the Stormer). These nonstandard geometries are difficult to analy2e, particularly for an infinite bath, as is usually employed with the Brookfield and the Stormer. The Brookfield disk has been analy2ed for Newtonian and non-Newtonian fluids and shear rate corrections have been developed (22). Other nonstandard geometries are best handled by determining iastmment constants by caUbration with standard fluids. 

These two instmments form a relatively inexpensive package that allows the characterization of a large number of materials over a wide range of viscosities and shear rates. Brookfield has also developed a digital Stormer-type viscometer (ASTM D562), Model KU-1, which is an improvement over the old manual Stormer. This low shear (- 50 ) viscometer is commonly used to test house paints. 

Storage tanks, 24 280. See also Tanks sulfuric acid and oleum, 23 783 Storage tanks hazards, 27 844 Storeroom management, 75 471 STORET water quality database, 73 313 Stormer viscometer, 78 69, 27 736, 737 Storm water... 

Figure 5,69 Feldspar geothermometry. From Stormer (1975). Reprinted with permission of The Mineralogical Society of America.

Stormer s (1975) model is based on the assumption that the potassic end-member has no influence on the mixing behavior of the plagioclase series and that the calcic component does not affect the mixing behavior of the K-feldspar series to any extent. With these assumptions, the problem of equilibrium between two ternary feldspars, normally represented by the equalities... 

Whitney I A. and Stormer I R. (1977). The distribution of NaAlSijOg between coexisting mi-... 

Interestingly, the standard entropies (and in turn heat capacities) of both phases were found to be rather similar [69,70]. Considering the difference in standard entropy between F2(gas) and the mixture 02(gas) + H2(gas) taken in their standard states (which can be extracted from general thermodynamic tables), the difference between the entropy terms of the Gibbs function relative to HA and FA, around room temperature, is about 6.5 times lower than the difference between enthalpy terms (close to 125 kJ/mol as estimated from Tacker and Stormer [69]). This indicates that FA higher stability is mostly due to the lower enthalpy of formation of FA (more exothermic than for HA), and that it is not greatly affected by entropic factors. Jemal et al. [71] have studied some of the thermodynamic properties of FA and HA with varying cationic substitutions, and these authors linked the lower enthalpy of formation of FA compared to HA to the decrease in lattice volume in FA. 

R.C. Tacker, J.C. Stormer Jr., A thermodynamic model for apatite solid solutions, applicable to high-temperature geologic problems. Am. Miner. 74 (1989) 877-888. 

The same apparatus was used, but quantities of paste were removed to give an air space in the vessel. On rapid agitation the volume increased, dependent on the air content required. Paste viscosities were measured, using a Stormer viscometer, which is a type of concentric cylinder viscometer. Although it is possible to obtain results in absolute terms, for comparative purposes the times for 100 revolutions of the rotor under a fixed applied torque were recorded. 

Perloff MD, von Moltke LL, Stormer E, Shader RI, Greenblatt DJ. Saint John s wort an in vitro analysis of P-glycoprotein induction due to extended exposure. Br J Pharmacol 2001 134(8) 1601-1608. 

Bauer S, Stormer E, Johne A, et al. Alterations in cyclosporin A pharmacokinetics and metabolism during treatment with St John s wort in renal transplant patients. Br J Clin Pharmacol 2003 55(2) 203-211. 

Mai I, Stormer E, Bauer S, Kruger H, Budde K, Roots I. Impact of St John s wort treatment on the pharmacokinetics of tacrolimus and mycophenolic acid in renal transplant patients. Nephrol Dial Transplant 2003 18(4) 819-822. 

The unsuitable nature of many commercial instruments which are in common use clearly illustrates the confusion prevalent in the field of viscometric measurements. Many instruments measure some combination of properties which depend only partly on the fluid consistency since the flow is not laminar. In others the shear rates are indeterminate and the data cannot be interpreted completely. Examples of such units include rotational viscometers with inserted baffles, as in the modified Stormer instruments in which the fluid flows through an orifice, as in the Saybolt or Engler viscometers instruments in which a ball, disk, or cylinder falls through the fluid, as in the Gardiner mobilometer. Recently even the use of a vibrating reed has been claimed to be useful for measurement of non-Newtonian viscosities (M14, W10), although theoretical studies (R6, W10) show that true physical properties are obviously not obtainable in these instruments for such fluids. These various instru-... 

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