Materials Literature
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A system for measuring the sensitivity of electric field sensors at UHF using a novel gigahertz transverse electromagnetic (GTEM) cell is described. The system was developed to enable calibration of UHF couplers that are used to detect insulation defects in gas insulated substations. The frequency response of a sensor…
Pierre A. Zippi, Freshwater Algae from the Mattagami Formation (Albian), Ontario: Paleoecology, Botanical Affinities, and Systematic Taxonomy, Micropaleontology, Vol. 44, Supplement 1: Freshwater Algae from the Mattagami Formation (Albian), Ontario: Paleoecology, Botanical Affinities, and Systematic Taxonomy (1998), p…
Carbon nanotubes are unique nanostructures with remarkable electronic and mechanical properties. Interest from the research community first focused on their exotic electronic properties, since nanotubes can be considered as prototypes for a one-dimensional quantum wire. As other useful properties have been discovered,…
A high-resolution computerized calorimeter capable of fully automatic operation in either ac or relaxation modes is described. Emphasis is given to a new version of the relaxation technique in which the heater power is ramped linearly in time. This improvement results in superior performance and convenience in studyin…
A method for dynamically updating the boundary conditions of atomistic simulations is presented. The lattice Green's function boundary relaxation method, originally introduced by Sinclair et al. in 1978, is extended to treat three-dimensional (3D) simulations. The boundary conditions for two-dimensional (2D) and 3D de…
Infrared (IR) spectra of well-ordered kaolinites generally show four OH-stretching frequencies, near 3697, 3670, 3652 and 3620 cm (super -1) . Raman spectra of the same kaolinites mostly show an additional band near 3686 cm (super -1) , which, in the coarsely crystalline Keokuk kaolinite, largely replaces the 3695 cm…
'In the destructive element immerse.' These words from Joseph Conrad's Stein in Lord Jim cast a shadow over twentieth-century literature. At the same time, Freud's bleak prognosis of culture's discont
We have studied the structure of lysozyme layers adsorbed at the silica−water interface using specular neutron reflection. The effect of pH on the adsorbed lysozyme layer was examined by manipulating the pH in two different cycles at two constant lysozyme concentrations of 0.03 and 1.0 g dm -3; the first cycle was sta…
Aluminum is a very important element because of its many practical applications, and XPS provides an attractive method for the investigation of, and distinguishing between, aluminum and its compounds. The Al 2p core XPS spectra shows a substantial shift (about 2 eV) between the metal peak and compound peaks, and the m…
Degradable polyurethane elastomers were synthesized using a diester chain extender. The chain extender was synthesized by a diesterification reaction between L-phenylalanine and 1,4-cyclohexane dimethanol to yield a diester, diamine. Soft segment chemistry (polycaprolactone diol, PCL and polyethylene oxide, PEO) and m…
We report in this work the characterization of La0.67Ca0.33MnO3±δparticles synthesizedvia sol–gel technology starting from an aqueous solution of the metallic nitrates and using urea as gelificant agent. The gelification is assumed to happen through the formation of polynuclear species by condensation reactions betwee…
A range of metal thioether macrocyclic complexes has been used as templating agents in the preparation of extended multi-dimensional polyiodide arrays. A selection of unusual and intriguing polyiodides is described, and the role played by the size, shape and charge of the metal macrocyclic complex discussed.
Octadecyltrichlorosilane (OTS) and [2-(perfluorooctyl)ethyl]trichlorosilane (FOETS) monolayers and their mixed monolayer were polymerized on a water subphase and subsequently immobilized onto a silicon wafer surface by covalent bonding. Atomic force microscopic (AFM) observation of the mixed (OTS/FOETS) monolayer reve…
The state of the art in determining molecular crystal structures from powder diffraction data using a global optimisation method is illustrated with a fast, automated simulated annealing approach to solving the previously unknown crystal structures of capsaicin, thiothixene and promazine hydrochloride.
The use of commingled yarns is one of the more promising routes for producing structural thermoplastic composites. The textile processes available enable faster manufacturing and tailoring of the fiber architecture of preforms. Development of this technology is pushed by significant interest from, for example, the tra…
SummaryThe effects of chitosan coatings (1.0% and 2.0% w/v) in controlling the decay of strawberries and raspberries and maintaining their quality were investigated. A chitosan coating significantly reduced the decay of berries stored at 13°C and induced a significant increase of chitinase and β-l,3-glucanase activiti…
The spin density distribution in transition metal complexes is discussed in qualitative terms, taking into account the coexistence of spin delocalization and spin polarization mechanisms, with the help of numerical results for several complexes obtained from density functional calculations. The covalent character of t…
Tensile failures Fatigue Other fibre studies Textile processing and testing Case studies - clothing and domestic uses Case studies - industrial uses Fibre archaeology and textile conservation Forensic studies Textile damage in forensic investigations Medical applications.
Spring meshes have been used to model elastic material in computer graphics, with skin, textiles, and soft tissue being typical applications. A spring mesh is a system of vertices and edges, possibly with highly irregular geometry, in which each edge is a spring, and springs are connected by “pin-joints” (“gimbal-join…
Applicability of the modified Wilson model for calculating drug solubility in water-cosolvent mixtures is presented. The accuracy and predictability of the model are compared with those of other models which calculate solute solubility as a function of the solvent composition. Mean of percent deviations from experimen…