Particle size analysis by image analysis

Allen, Terence D

doi:10.1016/b978-044451564-3/50005-x

Cited by 11 publications

(8 citation statements)

References 85 publications

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“…However, because of the experimental limitations, many alternative methods have been developed and tested (Allen, 1997). Among them, LD is a promising method because it overcomes many of the disadvantages of the sedimentation techniques.…”

Section: The Effect Of the Measuring Technique On Psd Analysismentioning

confidence: 99%

“…Indeed one could argue that there is not a 'universal' or 'true' method for PSD and that both methods reflect a different property of the material depending on the characteristics of the measuring methodology. Allen (1997) suggested that analysis of microscope images of soil particles could be regarded as an absolute method of particle-size analysis because, with this method, individual particles are directly observed and measured. Since the test and the parameterization of any PSD model, therefore also of the bimodal Gaussian model, are based on the reliability of the measurement, in this work we: (a) compared the PSD analysis obtained by sieving and pipette to LD techniques in the range of 0.05 to 1000 μm, and (b) compared the PSD analysis in the clay range as measured by LD and Transmission Electron Microscopy and Image Analysis.…”

Section: The Effect Of the Measuring Technique On Psd Analysismentioning

confidence: 99%

“…For simplicity most of the particle size analysis represent a particle as an equivalent sphere, such to represent it by using a single dimension (an equivalent diameter) for every size class (Allen, 1997). This assumption might have different effects on PSD analysis depending on the size fraction and on the chosen technique.…”

Section: The Effect Of the Measuring Technique On Psd Analysismentioning

confidence: 99%

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Laser diffraction, transmission electron microscopy and image analysis to evaluate a bimodal Gaussian model for particle size distribution in soils

2006

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Section: The Effect Of the Measuring Technique On Psd Analysismentioning

confidence: 99%

Section: The Effect Of the Measuring Technique On Psd Analysismentioning

confidence: 99%

Section: The Effect Of the Measuring Technique On Psd Analysismentioning

confidence: 99%

See 1 more Smart Citation

Laser diffraction, transmission electron microscopy and image analysis to evaluate a bimodal Gaussian model for particle size distribution in soils

2006

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“…Microscopy. The particle size distribution in the range 1-80 μm was determined by the method of laser diffraction using the laser particle size analyzer Microsizer 201 A. References to the relevant standards in the order of measurements are given in the sources [27,28]. The milling of plant raw materials according to the proposed scheme is as follows.…”

Section: мEthodsmentioning

confidence: 99%

Influence of discrete-pulse energy input on the distribution of plant biomass

Myronchuk¹,

Obodovych²,

Sydorenko³

2019

Ukr. food j.

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Introduction. The aim of this work is to determine the influence of dispersion modes of plant biomass of raw materials in the rotor-pulsating apparatus by the method of discrete-impulse energy input Materials and methods. The material of the studies was wheat straw and corn stalks, grinded on a disintegrator, which were mixed with water in certain proportions. The suspension was treated in a rotor-pulsating apparatus under different modes. The particle size distribution of the obtained particles was determined by the sieve method and the laser diffraction method. Results and discussion. It is determined that under the same conditions of treatment granulometric composition of the mixture of milled biomass of corn stalks with water after milling in the rotor-pulsating apparatus has a dispersity of 3-5% lower than the mixture of wheat. This can be explained by the different strengths of lignocellulosic fibers in the investigated plants. It was found that with the increase of a solid/water ratio from 1: 5 to 1:15, a dispersity of particles is reduced by 35-40%, and from 1: 5 to 1:10 by 3-5%. According to the authors, this is due to changes in the viscosity of the solution. Reducing the solid/water ratio from 1:15 to 1:10 for 10 cycles of the dispersion treatment in the rotor-pulsating apparatus leads to a decrease in temperature from 47 to 42º C (≈ 10%), but the productivity of the equipment increases 1.5-2 times, energy consumption decreases by 25-30%. The optimum parameters for milling of wheat straw or corn stalks in a rotor-pulsating apparatus are: the solid/water ratio is 1:10; the shear flow rate is 40•10 3 s-1 ; the frequency of flow pulsations is 3 kHz. The number of processing cycles is 25-30. It was determined that the granulometric composition of an aqueous dispersion of wheat straw or corn stalks at a solid/water ratio of 1:10 and treated in the rotor-pulsating apparatus with the frequency of pulsations of 3 kHz, shear flow rate 40•10 3 s-1 for 25-30 cycles allows the conclude that about 50% of the particles have a size in the range of 30-50 μm. Conclusions. Dispertion of plant biomass by the method of discrete-pulse energy input provides for obtaining 80% of particles with a size of 1-50 μm.

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“…The acquired images were subsequently elaborated using the software Image Pro-plus 6.0 (Media Cybernetics Inc, Rockville, USA). Particles size were determined according with Glicerina, Balestra, Dalla Rosa, & Romani, (2013), by evaluating the Feret diameter, defined as the distance between two tangent lines to the two opposite sides of the particles (Allen, 1997). An Euclidean Distance Map (EDM) was further generated in order to evaluate the distance between particles.…”

Section: Microstructural Analysismentioning

confidence: 99%

Influence of chitosan on thermal, microstructural and rheological properties of rice and wheat flours-based batters

Sansano

Heredia

Glicerina

et al. 2018

LWT

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Wheat flour replacement by rice flour is a key strategy in gluten-free batter production. Rice flour needs hydrocolloids to offset the development of the network of the mix. In this context, the aim of this work was to analyze the influence of chitosan (0 to 1 g/100 g of batter) addition on the microstructural, rheological and thermal properties of wheat:rice flours batters (100:0; 70:30, 30:70 and 0:100 (g/g)). Results showed that increasing replacement of wheat flour by rice one decreased the consistency (K) and the yield stress (0), and increased the flow behavior index (n) because of the absence or lower gluten content. However, the addition of only 0.25 g/100 g chitosan to rice flour formulation (0:100 (g/g)) increased its viscosity (from 371 to 1006 mPa•s), exhibiting a rheological behavior similar to wheat flour formulation (100:0 (g/g) (1050 mPa•s). Chitosan enhanced consistency and structural agglomeration, and the interaction among ingredients, especially in batters with high content of rice flour (30:70 and 0:100 (g/g)). Lastly, 2 chitosan incorporation did not significantly modify thermal properties, excepting in riceflour batters (0:100 (g/g), reducing Tm, ΔHm, and thus, increasing the bound water content (from 17 to 32 g/ g).

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Particle size analysis by image analysis

Cited by 11 publications

References 85 publications

Laser diffraction, transmission electron microscopy and image analysis to evaluate a bimodal Gaussian model for particle size distribution in soils

Laser diffraction, transmission electron microscopy and image analysis to evaluate a bimodal Gaussian model for particle size distribution in soils

Influence of discrete-pulse energy input on the distribution of plant biomass

Influence of chitosan on thermal, microstructural and rheological properties of rice and wheat flours-based batters

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