Materials Literature
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Two methods for modeling metal oxide surge arresters are presented and compared: the IEEE Working Group 3.4.11 surge arrester model and the simplified surge arrester model proposed by Pinceti and Giannettoni. The comparison of model performances and accuracy is conducted in the program package EMTP – RV. Detailed inst…
For wood a material with anisotropic characteristics and strength asymmetry, Hankinson ś formula was the first successful expression to predict the strength in non-parallel orientation to the grains. However, with the emergence of new materials, with directional properties, there was a need to formulate broader failur…
Increasing attention is being paid to the economic advantages that high-strength low-alloy steels have to offer. These advantages include lower structural weight (Fig. 1), increased resistance to brittle failure, economies during construction and transportation as a result of lower cost in handling lighter sections, f…
The microbial contamination of water is a world-wide environmental problem. Nanotechnology is one of the efficient tools which can be applied to solve this problem. Silver nanoparticles are known to be highly toxic to microorganisms, showing strong biocidal effect and are nontoxic to the human body at low concentratio…
Consolidation additives are used in the restoration of old paper documents for partial recovery of the loss of structural strength by natural ageing, as well as for reducing their further deterioration, due to environmetal action. The study evaluates the effectiveness of some unconventional chitosan-based additives, c…
This paper deals with squirrel cage induction machines and their modeling con- cerning the occurrence of current displacement in rotor bars caused by skin efiect. Considering non-steady-state operation such as direct on-line start and especially in the case of sustained ramp-up, e.g., by using Y-D starter or soft star…
A micro-electrochemical cell for detecting permeated hydrogen, which is generated by atmospheric corrosion at small scratched areas on coated steel, was developed. It is possible to measure hydrogen permeation currents in the nano-ampere range. Using this cell, the influence of the scratched area on the hydrogen gener…
Mono- and polydentate behaving guanidine ligands and their corresponding zinc complexes were prepared and investigated towards the influence of these special ligand classes on the molecular structures of the complexes as well as their performance in the ring-opening polymerization of lactide. All synthesized complexes…
The material properties of graphene, such as electrical conductivity, optical transmission, and chemical reactivity, can be drastically altered with fluorination, enabling new utility from this already promising material. Stoichiometric control of the fluorination of graphene was made possible by controlled exposure o…
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Ti-x HAp (x=0, 10, 20 and 30 mass%) composite powders were synthesised by mechanical alloying (MA) using a vibrational ball mill, and MAed composite powders were consolidated into bulk composite materials by spark plasma sintering (SPS). The hardness and constituent phase of the MAed powder and SPS materials were inve…
Effect of Metal Doping on Electronic Structure and Visible Light Absorption of SrTiO3 and NaTaO3 (Metal = Mn, Fe, and Co)
A simplified analysis of extended X-ray absorption fine structure (EXAFS) data has been presented for copper and nickel metals. Theoretical EXAFS data has been generated using standard EXAFS equation employing the software Mathcad. The phase shift for the backscattered photoelectron wave has been obtained from the exp…
TiO 2 nanotubes (TiO 2 NTs) were synthesized using the electrochemical method in a 1 M H 2 SO 4 + 0.15% HF electrolyte. The initial nanotubes have a diameter of 100 ± 10 nm (with the length of up to 150–200 nm) and a wall thickness of 20 ± 5 nm. Nanotube treatment at 400°C results in negligible changes in their struct…
Transparent films of polyvinyl alcohol with different doping Sodium Iodide concentrations were prepared by using solution cast technique. The optical absorption measurements were carried out for all samples at room temperature across the wavelength regions. The study has been also extended to include the changes in th…
In this chapter, the potentialities of membrane reactors (MRs) in hydrogen production are investigated considering the main industrial processes such as methane steam reforming, water gas shift, CO clean up, etc. The advantages offered by MRs in terms of higher conversion, higher hydrogen recovery, less catalyst amoun…
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Many drugs exist in crystalline solid form due to reasons of stability and ease of handling during the various stages of drug development. Crystalline solids can exist in the form of polymorphs, solvates or hydrates. Phase transitions such as polymorph inter-conversion, formation of hydrates, desolvation of solvates,…
Mesenchymal stem cells (MSCs) hold great promise as therapeutic tools to treat different types of disease and the use of preclinical animal models is mandatory for the development of novel MSC-based therapies. The mouse is one of the most important species used for preclinical experiments and, by extension, so is the…
Various types of accelerators, thiuram (TMTD), thiazole (MBTS), and sulfenamide (CBS) are added into a silica filled natural rubber (NR) compound. Their effects on vulcanization properties are also investigated. TMTD shows a fast vulcanization rate and a higer maximum torque (), as well as excellent mechanical propert…