Materials Literature
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The objective of this research was to determine the optimum freeness of virgin bamboo pulp capable of increasing pulp mixture strength and decreasing the quantity of old corrugated containers (OCC) pulp substitution in the mixture. OCC was soaked for 7 days and disintegrated afterward. Soda pulping of bamboo (Gigantoc…
This study was carried out to investigate the effect of adding mica (5, 10, 15, 20, 25 % vf) with variable particle size (35, 57, 70µm) on the mechanical and electrical properties of the unsaturated polyester composites. Some mechanical tests were carried out like (impact strength, flexural strength) and dielectric st…
Recovery of 137 Cs is one of the important steps in safe and effective management of High Level Liquid Waste (HLLW). Precipitation, solvent extraction and ion exchange are the prominent processes used for 137 Cs separation. Ion exchange processes, based on inorganic ion-exchangers, have several advantages like high ra…
Presence of non-lint materials (trash) in commercial cotton bales at various amounts degrades market values and further influences end-use qualities. To ensure fair trading, the USDA Agricultural Marketing Service introduced the High Volume Instrument (HVI) measurement as a universal standard index. Trash contents fro…
Ca-Sr hexaferrite samples with chemical composition Ca0.5Sr0.5MexFe12-2xO19 where (x = 0, 0.5) and Me = (CoAl / CoTi) synthesized using proper stoichiometric proportions by solid state reaction at 1040 o C for 105 hr. The chemical phase analysis has been carried out by X-ray powder diffrac- tion (XRD) method, which co…
Intrinsically conducting polymers (ICPs) have been studied extensively due to their intriguing electronic and redox properties and numerous potential applications. Polyaniline, its derivatives and composites has been recognized as ICPs. These polymers are attractive materials owing to good stabilities, easy synthesis,…
th , 2011, final version February, 28 th , 2011 ABSTRACT: In this work, an unbalanced magnetron sputtering system which allows for the production of corrosion resistance multilayer coatings is described. The major advantage of this system is that it combines features such as a multi-cathode setup, temperature control,…
The effect of sintering temperature and atmosphere composition on the microstructure and properties of sintered steels based on Astaloy CrL and Astaloy CrM pre-alloyed iron powders with ferromanganese and graphite additions was investigated. Green compacts were conventionally (1120°C) and high temperature (1250°C) sin…
K for 60 min. in vacuum (≈10 -5 torr). The X-ray diffraction analysis confirmed that these annealed films are polycrystalline corresponding to the rock salt (NaCl) FCC structure. From the XRD profiles, the grain size, dislocation density, micro strain and lattice constants were calculated. Resistivity of the virgin an…
Ultrasonic velocity and density measurements in WO 3 – Na 2O – P2O5 and WO 3-CaO-P2O5 composition glasses have been made at the room temperature by making use of pulse echo overlap method. These values are used to evaluate elastic moduli such as longitudinal, Young’s, bulk and shear moduli, Poisson’s ratio, acoustic i…
One of the methods of protecting steel against corrosion is by alloying addition as found in stainless steel. Corrosion resistance of Austenitic Stainless Steel is investigated in cassava fluid, maize pulp, and seawater. The rate of corrosion of stainless steel was highest in seawater (0.00179 mm/y) than in maize pulp…
A B ST R A C T Modern polymer chemistry is highly progressive in tailoring polymers to specific requirements such as mechanical, thermal and chemical stability, with better performance with wide range of pore size. Composite materials combine and maintain two or more distinct phases to produce a material that has prop…
Chemical composition and fiber characteristics of Iranian kenaf whole talk were determined. Then Soda and Soda-anthraquinone (Soda-AQ) cooking of kenaf core, bark and whole stalk from Iran was carried out under different conditions and pulps with good to very good yields and mechanical properties were obtained. The So…
Bird impact generally occurs during taking off or landing of flights. It is termed as soft body impact and assumed to be a hydrodynamic body. Shape Memory Alloy is a smart material which gets its original shape by heating. The impact on plastic kinematic materials are analyzed for kinetic energy, internal energy and c…
4 Abstract: The feasibility of heat engines, coupled with an internal combustion engine and designed to increase the coefficient of efficiency of hydrocarbon or other chemical fuels, was considered. The prospects of the use of osmotic phenomena in aqueous solutions of thermosensitive polymers in order to improve the o…
A thorough study on the aqueous solubility of 1,1/1,2-diphenylethane using different hydrotropes such as diethylnicotinamide, sodium pseudocumene sulfonate and sodium thiocyanate at various concentrations (0-3.0 mol/L) and at different system temperatures (303K to 333K). Consequent to the increase in solubility, the p…
The aim of this study was to develop a statistical model for the effect of RS (Rotor Speed), YT (Yarn Twist) and YLD (Yarn Linear Density) on production and quality characteristics of rotor spun yarn. Cotton yarns of 30, 35 and 40 tex were produced on rotor spinning machine at different rotor speeds (i.e. 70000, 80000…
Bacterial adhesion is the initial step towards the establishment of a biofilm and the process can be influenced by a number of environmental factors, including salt concentration of the bulk solution. This study investigated the influence of ionic strength on the elasticity of bacteria cell surface appendages by Quant…
The interaction of a solid with its surroundings is through the available surface area for adsorption of gas or vapour molecules. This also allows probing of materials surface including irregularities and pores. One of the most successful methods is based on the BET method for gas adsorption onto a solid surface. The…
Drug administration via mucosal membranes, including the vaginal, has the advantage of by passing the hepatogastrointestinal first pass metabolism associated with oral administration. Metronidazole suppositories were prepared using different suppository bases viz., water soluble bases ( PEGs and gelatin ) emulsion and…