Electrical Conductivity Articles on Environmental XPRT

Electrical conductance in a typical linear and cyclic quantum wire

Theoretical studies on electrical conductance in nanostructures which consist of two semi-infinite leads separated by a typical molecular wire are carried out within Green's function (GF) formalism in the linear regime. For this reason, the GF of extended molecular wire is obtained. Hence, the electrical conductance of the system is derived theoretically, using the GF elements and wire ...

Aug. 3, 2009

By Inderscience Publishers

Electrical conduction of calf-thymus DNA molecules

We present theoretical calculations to explain the behaviour of electrical conduction in calf-thymus DNA molecules trapped between a gap of 10 nm Au electrodes. Our work further explains the experimental I-V data reported for these DNA molecules that shows both large electrical hysteresis and voltage gap. We attribute their data to energy conservation within the molecules and electrons transfer ...

Aug. 10, 2009

By Inderscience Publishers

Conductivity Theory and Measurement

Electrical conductivity is a measure of the ability of a solution to cany* a current. Current flow in liquids differs from mat in metal conductors in that electrons cannot flow freely, but must be carried by ions. Ions are formed when a solid such as salt is dissolved in a liquid to form electrical components having opposite electrical charges. For example, sodium chloride separates to form Na" ...

Jan. 1, 2005

By IC Controls Ltd.

Electrical and optical properties of p–type conductive NiO–Pt thin films

In this work, we deposited NiO–Pt composite films with varying Pt content in the range of 0-25.83 at.%. An ultra high electrical resistivity (ρ) is obtained and cannot be detected by four point probe measurement when the Pt content in NiO films is lower than 1.46 at.%. As the Pt content in the films rises to 4.65 at.%, the ρ value can be reduced to 33.40 Ω cm, and it decreases significantly to ...

Mar. 17, 2014

By Inderscience Publishers

The fundamental conductivity and resistivity of water

Pure water has a very low. but not quite zero, electrical conductivity. This conductivity provides a probe into fundamental properties of water, including the electrochemical mobility of the hydrogen and hydroxide ions. Deviation from this value is a measure of trace ionic impurities. Ultrapure water (UPW). with impurities at or below the sub-parts-per-billion range, is used extensively in many ...

Jan. 1, 2005

By SnowPure Water Technologies

Determining Bentonite Content in Soil-Bentonite Mixtures Using Electrical Conductivity

A procedure based on electrical conductivity is described for measuring bentonite content in soil-bentonite mixtures having a wide range of bentonite contents. Standard equipment used for sedimentation analysis and an electrical conductivity meter are required. The procedure employs calibration curves relating electrical conductivity and bentonite concentration for soil-bentonite-water slurries. ...

Mar. 1, 1996

By ASTM International

Synthesis and characterisation of electrical conducting nanoporous carbon structures based on pyrogallol-formaldehyde

Electrical conducting carbon (ECC) nanoporous structures were explored by changing the pyrolysis temperature of organic xerogel compounds prepared by sol-gel method from pyrogallol-formaldehyde (PF) mixture in water using picric acid as catalyst. The effect of these preparation parameters on the structural and electrical properties of the obtained ECCs was studied. The obtained results revealed ...

Aug. 10, 2009

By Inderscience Publishers

Conducting core-sheath polyurethane-PEDOT nanofibres for conducting polymer actuator

Conducting core-sheath nanofibres were prepared by the vapour-phase polymerisation of poly(3,4-ethylenedioxy thiophene) (PEDOT) on electrospun polyurethane (PU) nanofibres both with and without incorporating graphene nanoplatelets (GNPs) as the core part. The morphology, mechanical properties, electrical conductivity, and electroactive actuation of the core-sheath nanofibres were investigated. ...

Jun. 3, 2013

By Inderscience Publishers

Estimating soil conductivity for GPR surveys

The results of a ground penetrating radar survey depends on many factors. In order to get useful data and good penetration, one of the conditions is that the conductivity of the ground is not too high. The conductivity of the material together with the operating frequency and the dielectric constant allow us to calculate the loss factor that is used to roughly estimate the theoretical ...

May 22, 2012

By Geoscanners AB

Thermal Conductive Plastics for LED Applications

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Mar. 10, 2017

By Larson Electronics LLC

Electrical conductivity as a state indicator for the start-up period of anaerobic fixed-bed reactors

The aim of this work was to analyse the applicability of electrical conductivity sensors for on-line monitoring the start-up period of an anaerobic fixed-bed reactor. The evolution of bicarbonate concentration and methane production rate was analysed. Strong linear relationships between electrical conductivity and both bicarbonate concentration and methane production rate were observed. ...

Feb. 10, 2016

By IWA Publishing

Extraordinary electron and phonon transport through metal-semiconductor hybrid nanocomposite: decoupling electrical and thermal conductivities for thermoelectric application

We report a simple method involving mechanical attrition followed by hot press sintering to fabricate tablet samples consisting of silver nanoparticles (Ag NPs) dispersed in luminescent silicon nanocrystal (Si NC) matrix. A dramatic increase in current by almost six orders of magnitude is observed for this type of Si NC-Ag NP hybrid nanocomposite compared with bare Si NC-based tablets. Collective ...

Jul. 22, 2014

By Inderscience Publishers

$Vertical disparity in electrical conductivity of groundwater: inferring water-bearing fractures in granitic aquifer$

Vertical disparity in electrical conductivity of groundwater: inferring water-bearing fractures in granitic aquifer

A detailed study was conducted in hard rock terrain for delineating water-bearing fractures using electrical conductivity (EC) logs. The EC logs of groundwater were taken both in pre- and post-monsoon seasons of the year 2001; in 25 borewells in a small granitic watershed at an interval of 1 m right from the water table (though narrow spacing wherever required) till the depth to bottom of the ...

Jun. 21, 2011

By Inderscience Publishers

Impact of the As Samra wastewater treatment plant upgrade on the water quality (COD, electrical conductivity, TP, TN) of the Zarqa River

The impact of the As Samra wastewater treatment plant upgrade on the quality of the Zarqa River (ZR) water was investigated. Time series data that extend from October 2005 until December 2009 obtained by a state-of-the-art telemetric monitoring system were analyzed at two monitoring stations located 4 to 5 km downstream of the As Samra effluent confluence with the Zarqa River and about 25 km ...

Apr. 4, 2013

By IWA Publishing

Hybrid materials of conducting polymers with natural fibres and silicates

The preparation, characterisation and properties of new hybrid materials of the conducting polymers polypyrrole and polyaniline with cellulose substrates in the form of paper fibres, paper sheets and wood; merino wool fibres; and kaolinite particles are presented. The conducting polymers form as spheres of about 50-150 nm that are fused together as a continuous coating which fully encapsulates ...

Feb. 6, 2009

By Inderscience Publishers

Should your company be conducting life cycle analyses?

Many companies have already answered yes to that question – for a combination of reasons typically related to stakeholder interest, key customer demands, public perception, and competitive positioning. In fact, life cycle analysis (LCA) has increasingly become an important tool in mature corporate sustainability programs, providing organizations with a consistent methodology for ...

Oct. 5, 2010

By Trinity Consultants

Conducting The Phase I Assessment - Records Review

This is the second in a series of five articles relating to conducting Phase I Environmental Site assessments. Each article attempts to give the reader a thorough understanding of a specific aspect of the Phase I process and Clayton’s commitment to meeting or exceeding the requirements of ASTM Standard E 1527 Standard Practice for Environmental Site Assessments: Phase I Environmental Site ...

Mar. 1, 2000

Development of an experimental model of the carotid bifurcation using electrically conductive silicone: an introduction to the incorporation of baroreceptor function within a mimetic model of the carotid artery

This study assesses the suitability of developing a material for use in an experimental model of the carotid baroreceptors. Such a model could then be used in future studies to assess the impact of carotid artery stenting on hemodynamic stability. The material must exhibit a significant measurable electrical response to strain in a fashion analogous to baroreceptor behaviour. A modified ...

Nov. 15, 2012

By Inderscience Publishers

Transparent conducting oxides superstrate for thin film solar cells: an industrial prospective

The demand for a TCO coated glass substrate as a base material and front electrode of the solar cells is expected to grow very strongly in the next few years. Therefore it is crucial to prepare the industrial tools and proper glass compositions to meet this very impressive demand. Mass production of extra clear glass and atmospheric pressure thermal CVD tool installed directly on the float glass ...

Jun. 25, 2009

By Inderscience Publishers

Experience with GCLs used as a conductive layer in geomembrane leak-location surveys

Engineers, installers, regulators, and owners are starting to rely on geomembrane leak-location surveys as part of the construction quality assurance for landfills. The various methods are described in ASTM Standard D 6747.' Standard procedures for conducting leak-location surveys of geomembranes covered with earth materials are described in ASTM Standard D 7007.2 Figure 1 shows the ...

Jun. 1, 2007

By Leak Location Services Inc. (LLSI)

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