Materials Literature
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ABSTRACT Permeability of air through porous pre‐gelatinized flour dough was measured as a function of porosity (0.10–0.60), moisture content (15–50%, wet basis), and fat content (0–6%). At free stream velocities <2 cm/sec, flow rate and pressure drop followed Darcy's law for flow through porous media. Permeability…
Abstract A reduced time approach has been used to predict nonisothermal curing kinetics based on isothermal kinetic data. This approach makes it clear that the conversion in a kinetic process is a function of the reduced time alone and allows for the construction of a master curve from isothermal kinetic data, indicat…
Interdiffusion coefficients in the β-phase of Ti-Si, Ti-Ge and Ti-Sn alloys have been determined by Matano's method in the temperature range between 1173 and 1823 K with (pure Ti)-(Ti-102 at.%Si alloy), (pure Ti)-(Ti-2.00at.% Ge alloy) and (pure Ti)-(Ti-1-65at.%Sn alloy) couples. By extrapolating the concentration dep…
We have conducted extensive high-pressure Raman-scattering studies in order to determine the effects of structure on the vibrational properties of layered aluminosilicate materials. The basal oxygen torsional mode is found to shift up with pressure at a rate that agrees reasonably with that expected from a simple van…
Reaction kinetics at various temperatures for pyrolysis of mixtures of plastic waste [polyethylene(PE) and polystyrene(PS)] are modelled in terms of five types of pyrolysis reaction. The model development is based on the assumption that as plastic wastes are heated in a non-reactive environment they are decomposed hom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron spin echo envelope modulation study on oxovanadium(IV)-porphyrin complexes: reinvestigation of hyperfine and quadrupole couplings of pyrrole nitrogenKouichi Fukui, Hiroaki Ohya-Nishiguchi, and Hitoshi KamadaCite this: J. Phys. Chem. 1993, 97, 46, 11858–11860Publicat…
Boron nitride (BN) has been deposited in situ on carbon fibers of 3D fibrous preforms by isopressure/isothermal chemical vapor infiltration (ICVI) from BCl 3 –NH 3 –H 2 mixtures, the aim being to produce a coating of uniform thickness in the whole preforms. The deposition temperature has been lowered to 773 K. Even at…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHyperchem release 3 for windowsJames L. PazunCite this: J. Chem. Inf. Comput. Sci. 1993, 33, 6, 931–933Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://doi.org/10.1021/ci00016a014RIGHTS & PERMISSI…
An analytical study was conducted to determine the feasibility of employing solar energy assisted thermoelectric (TE) cooling technology in automobile air conditioners. The study addressed two key issues—power requirements and availability of thermoelectric materials. In this paper, a mathematical model was developed…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpecific adsorption of saccharides by dealuminated Y-zeolitesChristoph Buttersack, Wolfgang Wach, and Klaus BuchholzCite this: J. Phys. Chem. 1993, 97, 46, 11861–11864Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 N…
This work investigates the intergranular corrosion of a sensitized Type 430 stainless steel in 1 N . Once the grain boundary groove is formed by dissolution of the Cr‐depleted material, a second form of localized corrosion commences within minutes and replaces the Cr‐depletion mechanism. The second‐mechanism attacks b…
Abstract Extensive surface‐enhanced Raman (SER) spectra of acridine and acridinium ions, taken as probes of DNA intercalating agents, were investigated in colloidal silver sols. From comparison of the SER and Fourier transform near‐IR Raman spectra, it is confirmed that acridine is adsorbed on the metal surface via it…
Abstract The energy balance model presented in Part I is applied here to data taken from the literature. Care was taken to choose well‐characterized systems to give a true test of the model's predictive character, rather than its ability to curve‐fit the data. The effects of concentration, particle size, strain rate,…
We study the electronic and Fourier-spectral properties of one-dimensional generalized Fibonacci lattices generated by the stacking rule ${\mathit{S}}_{\mathit{l}+1}$=${\mathit{S}}_{\mathit{l}}^{\mathit{n}}$${\mathit{S}}_{\mathit{l}\mathrm{\ensuremath{-}}1}^{\mathit{m}}$ with positive integers n and m, where ${\mathit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe cis-influence of hydroporphyrin macrocycles on the axial ligation equilibria of cobalt(II) and zinc(II) porphyrin complexesJack S. Summers and Alan M. StolzenbergCite this: J. Am. Chem. Soc. 1993, 115, 23, 10559–10567Publication Date (Print):November 1, 1993Publication H…
Abstract In a previous study, the mechanism of EPM peroxide vulcanization in the presence of various aromatic bis (allyl)esters was elucidated. It was concluded that the elastomer-coagent blend was phase separated and that during vulcanization chemical crosslinks are formed between the elastomer matrix and coagent dom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlasma polymerization of tetramethylsilaneJ. L. C. Fonseca, D. C. Apperley, and J. P. S. BadyalCite this: Chem. Mater. 1993, 5, 11, 1676–1682Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.a…
Photoluminescence and thermoluminescence in BaSO4:Eu is reported. In earlier works, divalent Eu has been studied in BaSO4. In the present work Eu was incorporated as in predominantly Eu3+ or Eu2+ form. It is shown that RE3+ ↔ RE2+ conversion or RE2+ ↔ RE+ conversion is not an integral part of gamma induced TL. Eu3+ ↔…
Resin bonded magnets are prepared from Sm/sub 2/Fe/sub 17/N/sub x/ compounds and their magnetic properties and stabilities are investigated. The magnetic properties of the Sm/sub 2/Fe/sub 17/N/sub 3/ fine powder are: B/sub r/=13.4 kG, H/sub ci/=8.6 kOe, and (BH)/sub max/=30.3 MGOe. The bonded magnets show (BH)/sub max…
We propose a mechanism for the long range interaction needed to explain the occurance of a “Devil's staircase” in smectic C* materials at the ferroelectric antiferroelectric transition point.