Materials Literature
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A short-range order dependent electronically self-consistent theory of ordering in ferromagnetic substitutional binary alloys is presented. The alloy internal energy is calculated using the cluster-Bathe-lattice method. The calculations use the results of elemental electronic structure calculations and experimental ma…
A new approach to the problem of the dielectric permittivity and losses observed in some NiZn polycrystalline ferrites which strongly differs from the Debye form is presented. Because the ferrite sample is considered as a disordered structure where the well‐conducting grains of various shape and size are separated by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanisms of .alpha.- and .beta.-eliminations of alkoxysilanes from saturated and unsaturated carbon frameworksSukhamaya. Bain, Sina. Ijadi-Maghsoodi, and Thomas J. BartonCite this: J. Am. Chem. Soc. 1988, 110, 8, 2611–2614Publication Date (Print):April 1, 1988…
The solidification of high-chromium cast iron containing 2.5% C, 0.3% Mn, 15% Cr, 0.7% Mo, 0.5% B and various concentrations of Si is examined. Samples were liquid quenched at different stages of the eutectic solidification process and examined metallographically and by silicon linear scanning. Two growth patterns wer…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature dependence of intramolecular disorder in the high-temperature phase of poly(tetrafluoroethylene) (phase I)C. De Rosa, G. Guerra, V. Petraccone, R. Centore, and P. CorradiniCite this: Macromolecules 1988, 21, 4, 1174–1176Publication Date (Print):April 1, 1988Publi…
Abstract Hen egg white lysozyme was adsorbed onto clean borosilicate glass and n‐pentyl silane‐treated glass surfaces. Both modified (reductively methylated) and native lysozyme were studied. Variable angle X‐ray photoelectron spectroscopy (VA‐XPS) suggested differences in the nature of the adsorbed layer depending on…
Summary Silicones have been incorporated in personal care products since the 1950s. Initially used in skin care products, and more recently in hair care applications, silicones are recognized for their lubricating properties and for the characteristic soft smooth feel they impart. With recent advances in silicone tech…
The new 4x4 matrix method described by Lin-Chung and Teitler [P. J. Lin-Chung and S. Teitler, J. Opt. Soc. Am. A 1, 703 (1984)] is used to study the optics of multilayer magnetooptic recording media. It is demonstrated that the method is capable of handling very complicated optical multilayer structures. For a quodril…
Regional transport of 1-aminocyclohexanecarboxylic acid (ACHC), a nonmetabolizable amino acid, across the blood-brain barrier was studied in pentobarbital-anesthetized rats using an in situ brain perfusion technique. The concentration dependence of influx was best described by a model with a saturable and a nonsaturab…
Cellulose fibers are selected as a reinforced filler for thermoplastics due to their superior mechanical properties and lower price compared to the thermoplastics. In the present study chemithermomechanical pulp of hard wood (aspen) fibers having selected aspect ratio (length/diameter) were first encapsulated with pol…
The formation of sulfbismuthides and the extents of solid solutions in the system Ag2S-Cu2S-PbS-Bi2S3 were studied at 500øC using sealed and evacuated capsule methods. Liquid is present in the Cu•S-rich region of both the systems Ag•S-Cu•S-PbS and Cu•S-PbS-Bi2S3. In the system Ag•S-Cu•S-Bi•S • two new phases, Ag2Bi4S7…
Abstract Der Aufbau der isotypen Verbindungen Cs 2 Mn 3 S 4 und Cs 2 Co 3 S 4 wurde an Einkristallen bestimmt (Raumgruppe Ibam, Z = 4). Zur Deutung der magnetischen Eigenschaften des Cs 2 Mn 3 S 4 wurde die Mischkristallreihe Cs 2 (Mn x Zn 1‐x ) 3 S 4 untersucht. Neutronenbeugungsuntersuchungen ermöglichten darüber hi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMDI-based polyurethane ionomers. 2. Structure-property relationshipsDaychyuan Lee, Richard A. Register, Changzheng Yang, and Stuart L. CooperCite this: Macromolecules 1988, 21, 4, 1005–1008Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Pu…
The order-disorder transformations in NaCN, KCN, and RbCN are studied under thermal cycling around ${T}_{c}$ by monitoring the change in optical transmission produced by the light-scattering properties of their multidomain ordered structures. The phase transitions in both NaCN (large-hysteresis cubic \ensuremath{\left…
Khellin, a naturally occurring furochromone, used in the past as a coronary vasodilator, has recently been used in the photochemotherapeutic treatment of vitiligo and psoriasis. With the aim of elucidating its mechanism of action, the interactions both in ground and excited states between the drug and DNA were studied…
Abstract Fifteen different pure polymers were studied by thermal methods under air, nitrogen, and nitrous oxide in order to determine their tendency to char in relation with their structure and the experimental conditions used. Styrene polymers and aliphatic polyolefines give chars under air and total volatilization w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of cellulose. 1. Low-energy conformations of single chainsIstvan Simon, Harold A. Scheraga, and R. S. John ManleyCite this: Macromolecules 1988, 21, 4, 983–990Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Published inissue 1 Ap…
In principle the analysis of positions and shapes of diffraction peak profiles can reveal the imperfect crystalline structure of a sample. The parameters 'size' and 'strain' as obtained from the established Warren-Averbach method need to be used cautiously: in essence the order-independent and order-dependent parts of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of lithium perchlorate on the properties of polyether networks: specific volume and glass transition temperatureJean Francois Le Nest, Alessandro Gandini, Herve Cheradame, and Jean Pierre Cohen-AddadCite this: Macromolecules 1988, 21, 4, 1117–1120Publication Date (…
The dynamic response of surface-stabilized ferroelectric liquid crystals was studied on the basis of a continuum theory. In this work, polarization electric field was consistently introduced through Poisson's equation, including the polarization charge accompanied by an elastic deformation. An improved anchoring energ…