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A new model for permeability impairment due to asphaltene deposition

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The existing theoretical and empirical models to describe asphaltene deposition in porous media do not  consider the complicated structure of pore network. Permeability reduction due to asphaltene deposition has been mainly attributed to pore volume shrinkage (porosity reduction). However, asphaltene...

Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions – A review

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Heavy metal remediation of aqueous streams is of special concern due to recalcitrant and persistency of heavy metals in environment. Conventional treatment technologies for the removal of these toxic heavy metals are not economical and further generate huge quantity of...

Antimicrobial Properties of Socks Protected with Silver Nanoparticles

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Antimicrobial properties of socks containing silver nanoparticles were investigated. Two types of socks were used for testing. The first were linen (100%) socks impregnated with a specimen containing silver nanoparticles. The second type were commercially available cotton (55%) socks containing...

Application of magnetic iron oxide nanoparticles in catalysts as catalyst base

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When synthesizing magnetic nanoparticles, some key conditions such as inherent magnetic properties, size and shape of nanoparticles, surface coatings and surface charge of nanoparticles, stability in aqueous  medium and their non-toxicity should be considered. By choosing a suitable synthesis method,...

Application of the stage gate model in production supporting quality management

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Product and process quality was and still is a key factor of success for manufacturing companies in the  competitive global business environment. The stage gate model represents a well-established method for  quality management in the product development domain. This paper...

Assessment of Nucleation Kinetic Mechanisms in Gas Hydrate Crystallization Processes

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Nucleation is one of the most important steps in the process of crystallization of gas hydrates. In the present work the nucleation mechanism  of gas hydrate formation process using the propane as a sII gas hydrate former is investigated at...

Batch Emulsion Polymerization of Vinyl Chloride: Application of Experimental Design to Investigate the Effects of Operating Variables on Particle Size and Particle Size Distribution

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In this article, the influences of operating variables on the particle size (PS) and particle size distribution (PSD) of emulsion poly(vinyl chloride) in batch reactor were investigated using Taguchi experimental design approach. The variables were temperature (T), water to monomer...

Biopolishing of cotton fabric with fungal cellulase and its effect on the morphology of cotton fibres

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تومان
Attempt has been made to analyse structural changes in cotton fibres occurred during biopolishing using cellulases obtained from Trichoderma reesei. Cellulase hydrolysis results in weight loss of the samples, which, in turn, results in the splitting of fibres and removal...

Carbon electrodes for capacitive technologies

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Carbon electrodes for capacitive technologies

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An overview of capacitive technologies based on carbon materials (energy storage in electrical double-layer capacitors (EDLCs), capacitive deionization (CDI), energy harvesting, capacitive actuation, and potential controlled chromatography) is presented. The review reveals the role of carbon for these scientific and...
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