Browsing by Subject "Water"
Now showing items 1-20 of 26
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Activated biochar derived from cactus fibres - Preparation, characterization and application on Cu(II) removal from aqueous solutions
(2014)The adsorption efficiency of activated biochar prepared from cactus fibres regarding the removal of Cu(II) from aqueous solutions has been investigated as a function of various physicochemical parameters (e.g. pH, initial ...
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Adsorption of hexavalent chromium on dunite
(2011)The paper presents and discusses the effect of various physicochemical parameters (e.g. pH, ionic strength, Cr(VI) initial concentration, amount of the adsorbent, temperature and contact time between metal ion and adsorbent) ...
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Adsorption of nitrogen and water vapour by activated Kevlar® chars
(1993)Fibrous activated carbons were prepared from Kevlar® (i.e. poly (p-phenylene terephthalamide), in the form of a commercially available woven textile. The cloth was carbonised in nitrogen and activated in either steam or ...
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Adsorption of nitrogen and water vapour by activated Nomex® chars
(1995)Fibrous activated carbons were prepared from Nomex® poly(m-phenylene isophthalamide), in the form of a commercially available woven textile. After carbonisation in nitrogen and activation in either carbon dioxide or steam ...
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Analytical methods for tracing pharmaceutical residues in water and wastewater
(2007)The focus of environmental analysis and determination of chemicals in the environment has recently been extended from the more classical pollutants to new contaminant categories including pharmaceuticals. This is attributed ...
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Binding free energies and free energy components from molecular dynamics and Poisson-Boltzmann calculations. Application to amino acid recognition by aspartyl-tRNA synthetase
(2001)Specific amino acid binding by aminoacyl-tRNA synthetases (aaRS) is necessary for correct translation of the genetic code. Engineering a modified specificity into aminoacyl-tRNA synthetases has been proposed as a means to ...
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Cationic amphiphilic model networks based on symmetrical ABCBA pentablock terpolymers: Synthesis, characterization, and modelling
(2007)Eight isomeric networks based on equimolar terpolymers were synthesized using group transfer polymerization (GTP) and were characterized in terms of their swelling properties. Two hydrophilic monomers, the nonionic methoxy ...
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Copper(II) removal from aqueous solutions by adsorption on non-treated and chemically modified cactus fibres
(2013)The adsorption efficiency of a biomass by-product (cactus fibres) regarding the removal of copper(II) from aqueous solutions has been investigated before and after its chemical treatment. The chemical treatment of the ...
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The density of water in carbon nanotubes
(2008)In this paper, the density of water confined in carbon nanotubes of different sizes and chirality is calculated. Molecular dynamics is used to simulate the spontaneous filling of the nanotube with water molecules coming ...
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Effects of monovalent anions of the Hofmeister series on DPPC lipid bilayers part II: Modeling the perpendicular and lateral equation-of-state
(2007)The effects of Hofmeister anions on the perpendicular and lateral equation-of-state (EOS) of the dipalmitoylphosphatidylcholine lamellar phase discussed in the companion article are here examined using appropriate free ...
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Method for Estimating the Acoustic Pressure in Tissues Using Low-Amplitude Measurements in Water
(2015)The aim of this study was to evaluate a simple, reliable and reproducible method for accuracy in estimating the acoustic pressure delivered in tissue exposed to ultrasound. Such a method would be useful for therapeutic ...
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Nanoscopic cationic methacrylate star homopolymers: Synthesis by group transfer polymerization, characterization and evaluation as transfection reagents
(2004)Seven star polymers with degrees of polymerization (DPs) of the arms from 10 to 100 and dimensions in the nanometer range were prepared using sequential group transfer polymerization of 2-(dimethylamino)-ethyl methacrylate ...
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Near-monodisperse, n-alkyl, end-functionalized poly(methyl vinyl ether)s: Synthesis by living cationic polymerization and solution characterization
(1998)Water-soluble amphiphilic diblock copolymers were synthesized by the living cationic polymerization of methyl vinyl ether (hydrophilic block) and its subsequent termination with n-alcohols of chain lengths varying from one ...
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On the actinic wavelength dependence of OClO photochemistry in solution
(2003)The role of actinic wavelength in OClO photochemistry was explored using femtosecond pump-probe spectroscopy. Specifically, the evolution of optical density was monitored at probe wavelengths from 267 to 900 nm following ...
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Parametric study and cost analysis of a solar-heating-and-cooling system for detached single-family households in hot climates
(2015)A solar-heating-and-cooling (SHC) system, consisting of a flat-plate solar collector array, a hot water storage tank, and an absorption chiller unit is designed and modeled to satisfy thermal loads (space heating, domestic ...
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Phase behavior of random and ABC triblock methacrylic polyampholytes with poly(vinyl alcohol) in water: effect of pH and salt
(1995)ABC triblock and random methacrylic polyampholytes of molecular weight 4,000 g mol-1 with various base-neutral-acid compositions were examined for their phase separation behavior, each in an aqueous mixture with poly(vinyl ...
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Polyelectrolytic amphiphilic model networks in water: A molecular thermodynamic theory for their microphase separation
(2002)The aqueous aggregation behavior of networks comprising hydrophilic ionic blocks and hydrophobic nonionic blocks was studied by formulating a molecular thermodynamic theory, which considers the Gibbs free energies of the ...
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The production and decay kinetics of CIOO in water and freon-11: A time-resolved resonance Raman study
(2001)The production and decay kinetics of ClOO in water and freon-11 were studied using time-resolved resonance Raman (TRRR) spectroscopy. The formation of ClOO following OClO photoexcitation at 390 nm was investigated using ...