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Influence of the sand particle shape on particle size distribution measured by laser diffraction method

100%

Polakowski C., Sochan A., Bieganowski A., Ryzak M., Foldenyi R., Toth J.

International Agrophysics

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2014

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tom 28

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nr 2

The aim of this paper was to show how the shape of sand particles affects the results of particle size distribution obtained by the laser diffraction method. On the basis of the results obtained one can conclude: the shape of the investigated particles influences particle size distribution obtained by the laser diffraction method. This phenomenon occurs in the sand fraction, as shown in our investigation. The importance of this effect depends on the type of the measured material and on the aim of the investigations. For most researchers in soil science and sedimentology who investigate sand fractions, this impact can be negligible. Further investigations with other soil and sediment fractions are needed.

2

Analysis of the size of fat globules in milk and cream dispersed in different reagents solutions

88%

Nowak K., Kielczewska K., Murach D., Dabrowska A.

Polish Journal of Natural Sciences

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2017

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tom 32

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nr 4

This study compared the dimensions of the dispersion of fat globules in dairy products based on microscopic and instrumental methods using laser diffraction. The research involved an analysis of 20% and 10% fat cream and 3.5% fat milk, both non-homogenized and homogenized at 20 MPa and 100 MPa. Chemical compounds affecting the dissociation or disaggregation of casein micelles and fatty globules agglomerates were added to samples intended for instrumental measurements. It was found that those compounds did not have any significant effect on changes of determinants characterizing the dispersion of fat globules in cream, while in milk they determined the size of particles with a decreasing intensity of differences between the parameters under analysis in the following order: non-homogenized milk > milk homogenized at 20 MPa > milk homogenized at 100 MPa.

3

Measurement and classification methods using the ASAE S572.1 reference nozzles

88%

Fritz B. K., Hoffmann W. C., Czaczyk Z., Bagley W., Kruger G., Henry R.

Journal of Plant Protection Research

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2012

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tom 52

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nr 4

An increasing number of spray nozzle and agrochemical manufacturers are incorporating droplet size measurements into both research and development. Each laboratory invariably has their own sampling setup and procedures. This is particularly true about measurement distance from the nozzle and concurrent airflow velocities. Both have been shown to significantly impact results from laser diffraction instruments. These differences can be overcome through the use of standardized reference nozzles and relative spray classification categories. Sets of references nozzles, which defined a set of classification category thresholds, were evaluated for droplet size under three concurrent air flow velocities (0.7, 3.1 and 6.7 m/s). There were significant, though numerically small, differences in the droplet size data between identical reference nozzles. The resulting droplet size data were used to categorize a number of additional spray nozzles at multiple pressure and air flow velocities. This was done to determine if similar classifications were given across the different airspeeds. Generally, droplet size classifications agreed for all airspeeds, with the few that did not, only differing by one category. When reporting droplet size data, it is critical that data generated from a set of reference nozzles also be presented as a means of providing a relative frame of reference.

4

Comparison of soil texture determined by two dispersion units of Mastersizer 2000

75%

Sochan A., Bieganowski A., Ryzak M., Dobrowolski R., Bartminski P.

International Agrophysics

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2012

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tom 26

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nr 1

The comparison of particle size distributions measured by sedimentation methods and laser diffraction shows the underestimation of the fine (clay) fraction. This is attributed mainly to the shape of clay particles being different than spherical. The objective of this study was to demonstrate differences in the results of particle size distributions of soils determined with the method of laser diffraction using two different dispersion units of the Malvern Mastersizer 2000.

5

Determination of particle size distrubution of soil using laser diffraction - comparison with areometric method

75%

Ryzak M., Bieganowski A.

International Agrophysics

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2010

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tom 24

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nr 2

177-181

6

Particle size characterization using fraunhoffer diffraction and milling performance of maize

63%

Le Deschault de Monredon F., Chaurand M.

International Agrophysics

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1997

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tom 11

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nr 4

7

Metody wyznaczania rozkładu granulometrycznego gleb mineralnych

51%

Ryzak M., Bartminski P., Bieganowski A.

Acta Agrophysica. Rozprawy i Monografie

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2009

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nr 4[175]

8

Dust creation during mahogany wood sawing

51%

Rogozinski T., Kopecky Z., Hlaskova L., Vesely P., Rousek M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2013

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tom 81

9

Comparison of two methods for granularity determination of wood dust particles

51%

Rogozinski T., Ockajova A.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2013

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tom 81

10

Variability of suspended sediment grain size distribution in winter floods

51%

Hejduk A., Hejduk L.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2016

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tom 48

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nr 2

11

Physical measurements applied to on line quality control in feed manufacturing

51%

Melcion J. P., Riou Y.

International Agrophysics

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1997

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tom 11

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nr 4

12

Relation of mineral nitrogen and sulphate sulphur content in soil to certain soil properties and applied cultivation treatments

45%

Acta Agrophysica

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2017

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tom 24

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nr 3

In the years 2008-2010 an environmental study was conducted, the objective of which was to estimate the current content of mineral nitrogen (nitrate V and ammonium) and sulphate sulphur in the soils of south-eastern Poland and to determine the relations of those elements with certain soil properties and cultivation treatments. 333 sampling points were designated, in which soil was sampled from 0-30, 30-60 and 60-90 cm depths. In the collected soil samples the Particle Size Distribution (PSD) was assayed with the use of Laser Diffraction Method (LDM), organic C using Tiurin method and pH in 1 mol KCl dm–3. Phosphorus and potassium were assayed using Egner- Riehm method (DL), mineral nitrogen (with division into the nitrate (V) and the ammonium form) with the colorimetric method using a flow auto-analyser, total and sulphate sulphur with the nephelometric method and assimilable magnesium after the extraction from soil in 0.0125 mol CaCl2 dm–3 with an ASA method. The highest content of nitrate (V) and ammonium nitrogen was noted in the 0-30 cm layer, irrespective of the spring or autumn date of soil sampling. The content of sulphate sulphur in the topsoil (0-30 cm) was the highest in organic and in heavy soils, but usually it did not differ significantly from medium, light and very light soils. The content of mineral nitrogen in the 0-30 and 0-90 cm layers was significantly and positively correlated with most of the assayed soil properties, whereas total and sulphate sulphur depended significantly and positively not only on soil properties, but also on the cultivation treatments.

Ograniczanie wyników

Influence of the sand particle shape on particle size distribution measured by laser diffraction method

Analysis of the size of fat globules in milk and cream dispersed in different reagents solutions

Measurement and classification methods using the ASAE S572.1 reference nozzles

Comparison of soil texture determined by two dispersion units of Mastersizer 2000

Determination of particle size distrubution of soil using laser diffraction - comparison with areometric method

Particle size characterization using fraunhoffer diffraction and milling performance of maize

Metody wyznaczania rozkładu granulometrycznego gleb mineralnych

Dust creation during mahogany wood sawing

Comparison of two methods for granularity determination of wood dust particles

Variability of suspended sediment grain size distribution in winter floods

Physical measurements applied to on line quality control in feed manufacturing

Relation of mineral nitrogen and sulphate sulphur content in soil to certain soil properties and applied cultivation treatments