Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPreparation and Characterization of Dendrimer-Encapsulated CdS Semiconductor Quantum DotsBuford I. Lemon and Richard M. CrooksView Author Information Department of Chemistry, Texas A&M University P.O. Box 30012, College Station, Texas 77842-3012 Cite this: J. Am. Chem.…
Properly designed organic molecules where a π-conjugated bridge is end-capped by an electron-donor and electron-withdrawing group (push–pull chromophores) can show, under specific conditions, frequency-upconverted lasing emission. Materials based on these dyes are therefore able to convert the emission of a cheap and…
The pore formation process of silica gel from tetraethoxysilane in the presence of citric acid (CA) was investigated. The silica gel prepared by pyrolysis of a composite of CA and silica had high specific surface area, ca. 1000 m 2 g -1 and its pore volume increased linearly with increasing CA content. In addition, th…
A new concept of polarization reversal and domain dynamics in modified ferroelectrics is presented. Accordingly, clusters with a reversed polarization within ferroelectric domains are nucleated under applied field in the vicinity of random fields around quenched defects. The random fields significantly lower the activ…
Irradiation with circularly polarized light of a film of an achiral azobenzene liquid crystalline polymer induces chirality. Circularly polarized light with opposite handedness produces enantiomeric structures. A chirooptical switch based on this phenomenon is reported.
The nuclear and magnetic structures of ${\mathrm{Sr}}_{2}{\mathrm{FeMoO}}_{6}$ have been investigated using neutron powder diffraction and M\"ossbauer spectroscopy at temperatures between 10 and 460 K. Fe and Mo atoms are found to order on alternate sites, as expected, giving rise to a double-perovskite-type unit cell…
The heterogeneity of food microstructure on mesoscopic scale plays a crucial role in the perception of food texture. Micro-rheology (the study of mechanical properties on a micrometer length scale) opens new perspectives for the study of “structure – function relationships” of food systems, and overcomes current limit…
The efflorescence problem in clay products and more specifically in construction bricks is a pathology which produce a decrease in the aesthetic quality of buildings. Their types and causes are very different and only a review of all the variables and classification can allow to start the understanding of this phenome…
This paper presents results on the physical and chemical properties of metakaolinite, MK which is prepared by dehydroxylation of high quality kaolinite. The properties of Portland cement mortars blended with MK additions up to 50% are investigated. These properties are compressive strength, pore size distribution, res…
Through the analysis of the different compounds (plaster + additives + E glass fibres) we pretend to demostrate that a synergic action is present between certain concrete additives (superfluidifiers, fluidiflers, and airingplasticizers) and E glass fibre, on the basis of the flection resistance of plaster matrix based…
This work describes a pegmatite mineral deposit composed by some veins of a length between 50 and 800 meters and a width of almost 15 meters. With the purpose to evaluate the potential exploitation, we have characterized the quality of the selling product, through a sampling procedure, granulometric classification, ma…
Lubricated squeezing flow (LSF) of a Herschel-Bulkley fluid between parallel disks under constant force was theoretically analyzed. An analytical expression for the fluid thickness as a function of time was obtained in terms of a hypergeometric function. The fluid thickness profiles in LSF were simulated for a range o…
The heat of hydration developed in reactions of mortars and concretes can be sensibly reduced using pozzolanic materials. However, the decrease of the heat of hydration is not directly proportional to the amount of cement substituted, because of the heat released in the pozzolanic reaction. With materials of high pozz…
Non altered straw and sugar cane bagasse ash (CPC, CBC) collected directly from the boilers in the sugar industry and from non-controlled burning in the open fields turned up to be a reasonably good pozzolana, which can be utilized for the manufacture of lime-pozzolana binders. This paper presents a detailed survey of…
Article Mechanical and Impact Properties of Untreated Jute Fabric Reinforced Polyester Laminates Compared With Different Ε-Glass Fibre Reinforced Laminates was published on December 1, 2000 in the journal Science and Engineering of Composite Materials (volume 9, issue 4).