Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Miller studies

The equilibrium of metals with molten sodium hydroxide and with fused alkali chlorides " has been studied in detail. Williams, Grand and Miller studied the reaction of molten sodium hydroxide with nickel. [Pg.437]

In several experiments, Miller studied the effects of using horizontal twin auger feed screws under partial vacuum (Alexanderwerk Inc., Horsham, Pennsylvania, model 50/75 compactor). The feed powder was vacuum deaerated just before roller compaction. The experimental design showed that the compactor s deaeration feed system significantly increased compaction output and minimized powder leakage when compacting very low density blends (<0.35 gcm ). ... [Pg.3171]

FIGURE 10.25 Hydroisomerization of n-hexadecane over Pt-SAPO-11 and Pt-silica-alumina catalysts monosubstituted methyl pentadecane contents versus pour point. Source S. J. Miller, Studies on Wax Isomerization for Lubes and Fuels, Studies in Surface Science and Catalysis 84 2319-2326 (1994). With permission. [Pg.324]

S. J. Miller, Studies on Wax Isomerization for Lubes and Fuels, Studies in Surface Science and Catalysis 84 2319-2326 (1994). [Pg.334]

By adding sufficient carbon, the color and the HCI can be completely adsorbed. This raises a question as to the manner in which the latter portion of dye is adsorbed Is it adsorbed as RCI, or as ROH with separate adsorption of the HCI Miller studied the adsorption using many different.proportions of dye and carbon. He found that the adsorption of dye color and chloride anion followed dissimilar paths, indicating independent adsorption of dye and acid. Separate adsorption is indicated by the fact that when... [Pg.222]

H. Miller Studies of Proton Flux in Forests and Heaths in Scotland in Effects of Accumulation of Air Pollutants in Forest Ecosystems ed. Ulrich Pankrath, Reidel/ Holland 1983. [Pg.154]

Robertson et a/. measured the density of argon at temperatures between 35 and 400 °C, at pressures between 1500 and 10000 bar. Kalfoglou and Miller studied the compressibility of argon at temperatures between 30 and 500 C, at pressures between 3 and 80 bar, and derived values of B and C. [Pg.183]

H. Kuzmany, J. F. Rabolt, B. L. Farmer, and R. D. Miller, Studies of chain conformational kinetics in po-ly(di-rt-alkylsilanes) by spectroscopic methods. 2. Conformation and packing of poly(di- -hexylsilane), J. Chem. Phys. 85 1411 (1986). [Pg.705]

A recent design of the maximum bubble pressure instrument for measurement of dynamic surface tension allows resolution in the millisecond time frame [119, 120]. This was accomplished by increasing the system volume relative to that of the bubble and by using electric and acoustic sensors to track the bubble formation frequency. Miller and co-workers also assessed the hydrodynamic effects arising at short bubble formation times with experiments on very viscous liquids [121]. They proposed a correction procedure to improve reliability at short times. This technique is applicable to the study of surfactant and polymer adsorption from solution [101, 120]. [Pg.35]

For many studies of single-crystal surfaces, it is sufficient to consider the surface as consisting of a single domain of a unifonn, well ordered atomic structure based on a particular low-Miller-mdex orientation. However, real materials are not so flawless. It is therefore usefril to consider how real surfaces differ from the ideal case, so that the behaviour that is intrinsic to a single domain of the well ordered orientation can be distinguished from tliat caused by defects. [Pg.285]

The coimection between the Porter-Thomas P(lc) distribution and RRKM theory is made tln-ough the parameters j -and v. Waite and Miller [99] have studied the relationship between the average of the statistical... [Pg.1032]

Waite B A and Miller W H 1980 Model studies of mode specificity in unimolecular reaction dynamics J. Chem. Phys. 73 3713-21... [Pg.1043]

Figure Bl.21.1 shows a number of other clean umeconstnicted low-Miller-index surfaces. Most surfaces studied in surface science have low Miller indices, like (111), (110) and (100). These planes correspond to relatively close-packed surfaces that are atomically rather smooth. With fee materials, the (111) surface is the densest and smoothest, followed by the (100) surface the (110) surface is somewhat more open , in the sense that an additional atom with the same or smaller diameter can bond directly to an atom in the second substrate layer. For the hexagonal close-packed (licp) materials, the (0001) surface is very similar to the fee (111) surface the difference only occurs deeper into the surface, namely in the fashion of stacking of the hexagonal close-packed monolayers onto each other (ABABAB.. . versus ABCABC.. ., in the convenient layerstacking notation). The hep (1010) surface resembles the fee (110) surface to some extent, in that it also... Figure Bl.21.1 shows a number of other clean umeconstnicted low-Miller-index surfaces. Most surfaces studied in surface science have low Miller indices, like (111), (110) and (100). These planes correspond to relatively close-packed surfaces that are atomically rather smooth. With fee materials, the (111) surface is the densest and smoothest, followed by the (100) surface the (110) surface is somewhat more open , in the sense that an additional atom with the same or smaller diameter can bond directly to an atom in the second substrate layer. For the hexagonal close-packed (licp) materials, the (0001) surface is very similar to the fee (111) surface the difference only occurs deeper into the surface, namely in the fashion of stacking of the hexagonal close-packed monolayers onto each other (ABABAB.. . versus ABCABC.. ., in the convenient layerstacking notation). The hep (1010) surface resembles the fee (110) surface to some extent, in that it also...
Although the correlation function formalism provides formally exact expressions for the rate constant, only the parabolic barrier has proven to be analytically tractable in this way. It is difficult to consistently follow up the relationship between the flux-flux correlation function expression and the semiclassical Im F formulae atoo. So far, the correlation function approach has mostly been used for fairly high temperatures in order to accurately study the quantum corrections to CLST, while the behavior of the functions Cf, Cf, and C, far below has not been studied. A number of papers have appeared (see, e.g., Tromp and Miller [1986], Makri [1991]) implementing the correlation function formalism for two-dimensional PES. [Pg.59]

Jaquet and Miller [1985] have studied the transfer of hydrogen atom between neighbouring equilibrium positions on the (100) face of W by using a model two-dimensional chemosorption PES [McGreery and Wolken 1975]. In that calculation, performed for fairly high temperatures (T> rj the flux-flux formalism along with the vibrationally adiabatic approximation (section 3.6) were used. It has been noted that the increase of the coupling to the lattice vibrations and decrease of the frequency of the latter increase the transition probability. [Pg.112]

The length of the recirculation zone, x, for a linear jet (the distance to the point of jet attachment to the surface) was studied by Sawyer,Miller and Comings, and Bourque and Newman.The results of these studies, summarized in Awbi, show that the length of the recirculation zone (Fig. 7.31) is proportional to the distance from the outlet to the surface and cait be described as... [Pg.472]

Tavakkol, S., M. H. Hosni, P. L. Miller, and H. E.. Straub. 1994. A study of isothermal rhrow of air jets with various room sizes. ind outlet configurations. ASHRAE Transactions, vol. 100. no. 1, pp. 1679-1686. [Pg.516]

The alkynylation of estrone methyl ether with the lithium, sodium and potassium derivatives of propargyl alcohol, 3-butyn-l-ol, and propargyl aldehyde diethyl acetal in pyridine and dioxane has been studied by Miller. Every combination of alkali metal and alkyne tried, but one, gives the 17a-alkylated products (65a), (65c) and (65d). The exception is alkynylation with the potassium derivative of propargyl aldehyde diethyl acetal in pyridine at room temperature, which produces a mixture of epimeric 17-(3, 3 -diethoxy-T-propynyl) derivatives. The rate of alkynylation of estrone methyl ether depends on the structure of the alkyne and proceeds in the order propar-gylaldehyde diethyl acetal > 3-butyn-l-ol > propargyl alcohol. The reactivity of the alkali metal salts is in the order potassium > sodium > lithium. [Pg.68]

Miller et al. [9] hypothesized rules on the regioselectivity of addition from the study of the base-catalyzed addition of alcohols to chlorotnfluoroethylene. Attack occurs at the vinylic carbon with most fluorines. Thus, isomers of dichloro-hexafl uorobutene react with methanol and phenol to give the corresponding saturated and vinylic ethers The nucleophiles exclusively attack position 3 of 1,1-dichloro-l,2,3,4,4,4-hexafluoro-2-butene and position I of 4,4-dichloro-l,l,2,3,3,4-hexafluoro-1-butene [10]. In I, l-dichloro-2,3,3,4,4,4-hexafluoro-l-butene, attack on position 2 is favored [J/] (equation 5) Terminal fluoroolefms are almost invariably attacked at tbe difluoromethylene group, as illustrated by the reaction of sodium methoxide with perfluoro-1-heptene in methanol [/2J (equation 6). [Pg.730]

Several features of this treatment are of interest. Compare the denominators of Eqs. (3-147) and (3-149) Miller has pointed out that the form of Eq. (3-147) is usually seen in chemical applications of the steady-state approximation, whereas the form of Eq. (3-149) appears in biochemical applications. The difference arises from the manner in which one uses the mass balance expressions, and this depends upon the type of system being studied and the information available. [Pg.103]

R. Jayaram, M.K.Miller, An atom probe study of grain boundary and matrix chemistry in microalloyed NiAl, Acta metall.mater. 42 1561 (1994)... [Pg.402]

Burke, A. F., and Miller, M. (1997). Assessment of the Greenhouse Gas Emission Reduction Potential of Ultraclean Hybrid-Electric Vehicles. Institute of Trans-porta-tion Studies. Report No. UCD-ITS-RR-97-24 (December). Davis University of California. [Pg.644]

A number of studies have focused on D-A systems in which D and A are either embedded in a rigid matrix [103-110] or separated by a rigid spacer with covalent bonds [111-118], Miller etal. [114, 115] gave the first experimental evidence for the bell-shape energy gap dependence in charge shift type ET reactions [114,115], Many studies have been reported on the photoinduced ET across the interfaces of some organized assemblies such as surfactant micelles [4] and vesicles [5], wherein some particular D and A species are expected to be separated by a phase boundary. However, owing to the dynamic nature of such interfacial systems, D and A are not always statically fixed at specific locations. [Pg.84]


See other pages where Miller studies is mentioned: [Pg.207]    [Pg.578]    [Pg.209]    [Pg.169]    [Pg.127]    [Pg.207]    [Pg.578]    [Pg.209]    [Pg.169]    [Pg.127]    [Pg.33]    [Pg.551]    [Pg.1985]    [Pg.2816]    [Pg.310]    [Pg.114]    [Pg.488]    [Pg.230]    [Pg.389]    [Pg.1782]    [Pg.798]    [Pg.6]    [Pg.57]    [Pg.475]    [Pg.222]    [Pg.99]    [Pg.158]   
See also in sourсe #XX -- [ Pg.22 ]




SEARCH



Miller

© 2024 chempedia.info