particle analysis Articles | Environmental XPRT

Detection of abnormal wear particles in hydraulic fluids via electromagnetic sensor and particle imaging technologies

Abstract Particle imaging, electromagnetic, ferrographic, and spectroscopic methods were used to evaluate hydraulic oil samples collected from machines known to be generating abnormal wear particles. Analytical ferrography confirmed the presence of large reworked ferrous particles and small rubbing wear particles in the oil samples. ICP emission spectroscopy was limited in its ability to detect ...

Mar. 8, 2019

By AMETEK Spectro Scientific

Particle shape factors and their use in image analysis - part 1

Fine panicles are often characterized by their particle size and distribution as determined by various analytical instruments. Particle shape may be just as important as particle size. Particle shape, however, is often ignored or disregarded. Image analysis is a technique capable of measuring particle shape factors and providing valuable information. These shape factors may dictate the behavior ...

Jul. 2, 2013

By Particle Technology Labs

Evaluation of Indian input to the international nuclear information system database

The study is aimed at analysing the INIS bibliographic records of publications in India during the period 2000-2008. The analysis includes the inputting trend, time-lag, contributing journals, country collaboration, content analysis through the classification and keywords. India has a total number of 14,697 records input to the database with an yearly average of 1631 records. The timeliness of ...

Aug. 22, 2011

By Inderscience Publishers

Lorentz covariant formulation for the laws of physics – particle and elastic body dynamics

An equation representing a law of physics is said to be Lorentz covariant if it can be written in terms of Lorentz covariant quantities. The key property of Lorentz covariant equations is that if they hold in one inertial frame, then they hold in any inertial frame. This condition is a requirement according to the principle of relativity, that is, all non–gravitational laws must make the same ...

Jan. 25, 2012

By Inderscience Publishers

Simulation of food mastication based on discrete element method

The information on mastication and food sensory properties is usually collected by recording people's ingesting and chewing actions using electromyography, fluorography, cinephotography, videofluorography, ultrasonography, magnetic resonance imaging and so on. The process of human food mastication and swallowing is investigated by Discrete (or Distinct) Element Method (DEM) in this work. The ...

Aug. 19, 2010

By Inderscience Publishers

Particle shape factors and their use in image analysis part II: practical applications

Abstract The first installment of this two-part discussion concluded by stating a single linear measurement (i.e.. circular equivalent diameter) may not be adequate to describe a tj^ical non-spherical particle with some degree of surface roughness. There are various definitions and several standardized shape factors available that can provide additional descriptors to a particle population of ...

Jul. 2, 2013

By Particle Technology Labs

Dimensionality effects on the magnetisation processes in arrays of superparamagnetic nanoparticles

We analyse the effect of inter-particle coupling and clustering on the zero-field cooled (ZFC) magnetisation processes of superparamagnetic nanoparticles. The static interaction field in dense assemblies of nanoparticles of different dimensionalities (1D, 2D and 3D) is investigated by numerical micromagnetic simulations. An analytical model is then used in order to evaluate the influence of the ...

Dec. 2, 2009

By Inderscience Publishers

Observation of sol–gel transition for carbon nanotubes using electroacoustics: Colloid vibration current versus streaming vibration current

Propagation of ultrasound through a porous body generates an electric signal, similarly to the well-known electroacoustic effect in dispersions of mobile particles. This obscure version of electroacoustics has been known since 1948, when M. Williams published his paper on electrokinetic transducers [M. Williams, Rev. Sci. Instrum. 19 (10) (1948) 640–646]. We observe this effect in a 1 wt% aqueous ...

Jun. 1, 2007

By Dispersion Technology Inc.

Ammonium removal from aqueous solution by zeolite X synthesized from halloysite mineral

Zeolite X was successfully synthesized from natural halloysite mineral by hydrothermal method. The synthesized zeolite X was characterized by XRD, SEM, TEM and HRTEM. The characterization indicated that zeolite X had high crystallinity together with symmetrical and uniform pore channels. Ammonium (NH4+) adsorption properties of zeolite X were studied using batch experiments. The results revealed ...

Aug. 1, 2010

By IWA Publishing

The wear properties of nuclear grade graphite IG-11 under different loads

The influence of normal load on wear performance of graphite used in a 10 MW high temperature gas-cooled reactor was investigated. The experiments included the wear between graphite and graphite specimens, and the wear between graphite and stainless steel specimens. The worn surfaces and abrasive particles were analysed with SEM and the wear mechanism was discussed. The sizes of abrasive ...

Nov. 15, 2004

By Inderscience Publishers

Multiple-scattering calculations for plasmonic nanostructures

After a brief description of the multiple-scattering method for photonic crystals, we present some results obtained by this method, relating to various types of plasmonic nanostructures in one, two and three dimensions: cavity plasmon waveguides, systems of metallic particles, and arrays of metallic shells. We analyse the optical response of these structures and emphasise some interesting aspects ...

Dec. 1, 2008

By Inderscience Publishers

$Problems in Particle Size: Laser Diffraction Observations$

Problems in Particle Size: Laser Diffraction Observations

The results obtained by a particle size analysis can easily be taken for granted. If the particle size distribution of a material must be quantified and reported, it is important that the full implications of the analytical technique and generated data are investigated and understood. While complying with designated testing methods and procedures is of great importance in a quality assurance ...

Jul. 2, 2013

By Particle Technology Labs

Divalent zinc removal from aqueous solutions by adsorption on magnetite nanoparticles: kinetics and isotherm

Magnetite nanoparticles were applied to remove Zn(II) from aqueous solutions in batch systems. Rate experiments were performed at various initial Zn(II) concentrations (1 and 4 mmol/L), adsorbent concentration (2.5, 5 and 10 g/L) and particle size (10 and 20 nm). The experimental data were analysed using several kinetic equations to determine the best–fit equation and related parameters were ...

Jun. 11, 2012

By Inderscience Publishers

PMMA (Acrylic Plastic)

Material Description: Acrylic plastic is commonly known as plexiglass, resistant to outdoor aging. It has excellent light transmission and good surface finish, and can print transparent and translucent products with certain strength requirements. The disadvantage is that the surface hardness is slightly lower and it is easy to scratch. Application: pmma injection molding is widely used in ...

Oct. 24, 2019

By Duch Group

Effects of current density on copper nanoparticle prepared by electrochemical method

Copper nanoparticles are prepared by electrochemical method with various current density in emulsion containing sodium dodecyl sulfate, tween80, dodecyl mercaptan, CuSO4 5H2O. The resulting copper nanoparticles are investigated by XRD, TEM and FT-IR. The result shows that great changes have taken place in the size, the dispersibility, and the distribution of particles size as the current density ...

Aug. 26, 2010

By Inderscience Publishers

CCS vs. Electrostatic Precipitators for Abrasives, Ceramics, Non-Soluble PM2.5, Submicron Particulate

Manufacturing Processes. Applications where conventional equipment is very inefficient or very expensive to operate and maintain provides an opportunity for the Cloud Chamber Scrubber (CCS) to showcase its unique capabilities. Abrasives manufacturing is a typical example. CCS Cloud Chamber technology was chosen by Saint-Gobain Advanced Ceramics Corp. (formerly Carborundum Corp.) for the ...

Mar. 26, 2007

By Tri-Mer Air Pollution Control Systems

Comparison of digital and manual methods of snow particle size estimation

Maintaining long time series of observations of the Cryosphere is a key issue in climate research. Long observational time series involve problems due to change in methodology or observers. In order to extend time series and introduce new methods, careful comparisons must be made to ensure homogeneity in the observational data. We have compared an established method for snow grain-size ...

Jan. 1, 2012

By IWA Publishing

Statistical Analysis: Liquid-Borne Particles

Abstract The impact of statistics on choosing and using a liquid particle counter is reviewed. The statistical techniques used with liquid particle counters are well known and relatively simple, but the simultaneous impact of both sample volume and size sensitivity on liquid particle data has not been fully explored in the literature. Both sample volume and sensitivity effect the total number of ...

May 18, 2019

By Particle Measuring Systems

Granulometric Evaluation of Particle Size Using Suspension Pressure During Sedimentation

A new method, computerized granulometric analysis in suspension (C-GRAINS), is suggested for the sedimentation analysis of soil particles based on the relation between the specific weight and liquid pressure of a soil suspension. Theoretical aspects concerning this new testing method are discussed, and a prototype C-GRAINS system is fabricated accordingly. The general behavior of the new system ...

Mar. 1, 1995

By ASTM International

Minimum Test Specimen for Gradation Analysis

Minimum test specimen masses are recommended for gradation analysis testing. The specimen is based on the accuracy required and the maximum particle size present in the soil being tested. For gradation analyses to be reported to the nearest 1 percentage point, the minimum test specimen mass should be at least 100 times the mass of an idealized maximum size ...

Sep. 1, 1988

By ASTM International