Materials Literature
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In this study, three Fly Ashes (FA) from Spanish Power Plants with CaO contents between 2-30% in weight were examined. They were leached using a variation on EPA-EP leaching test, checking the influence of the leaching process on FA. Leaches were analyzed by ICP. XRD and SEM-EDX technique were used to analyze the leac…
Fly ash, from the Coal Power Plant of Narcea (Asturias), has been used to determine its possible use as a raw material in the bare face red-brown brick manufacture. The correct mould of a ceramic material demands a paste with an adequate plasticity. So, the optimum compositions of humidity, lubricant (talc) and binder…
Diffusing wave spectroscopy (DWS) in the backscattering geometry was employed to observe the evolution of the intensity correlation function during the acidification of skimmed milk by gluconic-δ-lactone (GDL). At the stage when the formation of casein particle gel is largely complete the correlation function at short…
During the course of a study of biodeterioration at Hermitage Castle in the Scottish Borders various rare minerals: monohydrocalcite, nesquehonite and dypingite were found in association with the biological growths. Monohydrocalcite was found particularly in association with a green alga "Trentepohlia aurea". A brief…
In a thorough previous research (1), it appeared that creation, evolution and development of the values of compressive mechanical strength (CS) and flexural strength (FS), measured in specimens 1x1x6cm of mortar type ASTM C 452-68 (2), manufactured by ordinary Portland cement P-1 (14.11% C3A) or PY-6 (0.00% C3A), meta…
This short article is a summary of a recently published, lengthy review [1] in which the author challenges the often-accepted view that materials have yield stresses, below which no flow takes place. However, following the introduction of the new generation of controlled-stress rheometers it is shown that when careful…
Eucalyptus oil is a commonly used remedy for common colds. For a substance to be effective therapy in obstructive airway diseases, it must reduce the viscosity of respiratory mucus. The present study evaluates the effectiveness of eucalytpus oil added phospholipid mixtures as possible substitute therapies in diseases…
In this paper, I present a study of the spherical elongation of fabrics under cyclic stresses on those parts of a garment that are most exposed to stress, the elbow and the knee. For this purpose, I have developed a new modified apparatus and a new method for testing the spherical deformation of fabric. In addition, I…
In spinel‐phase ferrimagnets, disorder in the cation distribution between octahedral and tetrahedral sites can influence such fundamental magnetic properties as saturation magnetization, exchange coupling, and ferrimagnetic ordering temperatures. Given the sensitivity of magnetic properties to structure, it has been s…
The cell wall is often pictured as a more-or-less random feltwork of cellulose microfibrils in association with other polysaccharide and protein complexes. There is evidence from morphology, morphogenesis and mechanics that the structures in the cell wall are far more regular and that their interactions are driven by…
Magnetic impurity effects on metallic carbon nanotubes are studied theoretically. The resolvent method for the multi channel Kondo effect is applied to the band structure of the kp perturbation hamiltonian in the limit of the infinite onsite repulsion at the impurity site. We discuss the local non-Fermi liquid behavio…
We report on time-resolved and steady-state photoluminescence studies of GaAs/AlGaAs V-groove quantum wire structures. Steady-state photoluminescence experiments are performed in the temperature range from 8K to 200K. We evaluate the relation between photoluminescence excitation and absorption and determine experiment…
We consider a finite ferroelectric superlattice in which the elementary unit cell is made up of l atomic layers of type A and n atomic layers of type B. Based on the transverse Ising model we examine the phase transition properties of the ferroelectric superlattice. Using the transfer matrix method we derive the equat…