scholarly journals EVALUATION OF POWDER PROPERTIES FROM THE SEED COAT OF TINGUI (Magonia pubescens) AS AN EXCIPIENT FOR SEED PELLETING

2007 ◽  
Vol 29 (67) ◽  
Author(s):  
Antonio Zenon Antunes Teixeira
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Seed Coat ◽  
Corn Starch ◽  
Hydroxypropyl Methylcellulose ◽  
Fluorescence Analysis ◽  
Flow Properties ◽  
X Ray ◽  
Tap Density ◽  
Powder Properties

The aim of this study was to investigate the physical properties of the seed coat of Tingui (Magoniapubescens) in order to evaluate the performance of this polysaccharide as an excipient for seedpelleting. The analysis was emphasized to the flow properties including particle size, particle sizedistribution, density and moisture content of the substance. The results were compared tocommercial excipients including Microcrystalline cellulose (MCC PH 101 and SMCC), Hydroxypropyl methylcellulose (HPMC E50), Polyvinil pirrolidone (PVP K29/32), lactose andcorn starch. The data showed that Tingui was found to have bulk and tap density close to HPMCand corn starch. Particle size and its distribution were fit to HPMC and PVP; however, Tingui hadmoisture content quite close to SMCC and HPMC. In general, Tingui exhibited the free-flowproperties comparable to HPMC and PVP. Energy dispersive X-ray fluorescence analysis confirmedthat the seed coat of Tingui contains elements (K, Ca, Si and Fe) composition.

scholarly journals Investigation of Avalanche Time and Carr’s Index of Poultry Litter Powder as Flowability Indices

2012 ◽  
Vol 45 (4) ◽  
pp. 15-27 ◽  
Author(s):  
I. Valaei ◽  
S.R. Hassan-Beygi ◽  
M.H. Kianmehr ◽  
J. Massah
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Rotational Speed ◽  
Flow Behavior ◽  
Poultry Litter ◽  
Primary Source ◽  
Critical Factor ◽  
Bulk Solid ◽  
Tap Density ◽  
Powder Avalanche

Abstract The world’s dependence on chemical fertilizer as the primary source for enriching agricultural fields is continually increasing that cause nature pollution. This has led researchers to aggressively investigate renewable fertilizer resources, biomass, to produce organic crops and reduced wastage. Poultry litter is a bulk solid and biomass feed stocks. Flow behavior of bulk solid is a critical factor in designing and developing suitable equipments (e.g. pelletizing machine). The bulk density, tap density, Carr’s index and powder avalanche time technique were applied to evaluate the flow properties of poultry litter. The experiments were carried out at moisture content (10, 20 and 30% w.b.), particle size (0.3, 0.6 and 1.18 mm) for the bulk and tap densities as well as Carr’s index. In addition to the moisture content (10, 20 and 30 %w.b.) and particle size (0.3, 0.6 and 1.18 mm) the rotational speed of drum (0.5, 1 and1.5 rpm) were also investigated for the avalanche time. The results showed that with increasing moisture content Carr’s index increased significantly (P<0.01) in the ranges of 16.2% to 18.5% and with increasing particle size the Carr’s index decreased from 20.35% to 14.78%. The litter powder avalanche time (AT) increased significantly (P<0.01) with increasing moisture content and decreasing rotational speed and particle size. The bulk and tap densities of the litter powder was decreased with increasing moisture content and increasing the particle size. The bulk and tap densities of the driest and finest poultry litter sample were higher than other ones.

Correction Method for Particle-Size Effect in XRF Analysis of Ore Slurries

1987 ◽  
Vol 31 ◽  
pp. 503-506
Author(s):  
Marek Lankosz
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Fluorescence Analysis ◽  
Particle Size Effect ◽  
Correction Method ◽  
Measured Concentration ◽  
X Ray ◽  
Weight Percentage ◽  
Xrf Analysis

In on–stream X–ray fluorescence analysis of ore slurries, the effects due to variation in the particle-size of solids can cause appreciable and sometimes major errors in the measured concentration of an element to be determined. Weight percentage of slurry ore grains with diameter smaller than 75 um (called later W75) is commonly used as measure of ore fineness and can be determined using particle-size analyzers. A method of correcting for W75 variaition is highly desireable, particularly in a case when high analysis accuracy is required for economical reasons.

scholarly journals Eight-year variations in atmospheric radiocesium in Fukushima City

2021 ◽  
Author(s):  
Akira Watanabe ◽  
Mizuo Kajino ◽  
Kazuhiko Ninomiya ◽  
Yoshitaka Nagahashi ◽  
Atsushi Shinohara
Keyword(s):  
Particle Size ◽  
Numerical Model ◽  
Causal Relationship ◽  
Seasonal Variations ◽  
Fluorescence Analysis ◽  
Terrestrial Ecosystems ◽  
Nuclear Accident ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
X Ray

Abstract. After the Fukushima nuclear accident, atmospheric 134Cs and 137Cs measurements were taken in Fukushima city for eight years, from March 2011 to March 2019. The surface air concentrations and deposition of radio-Cs were high in winter and low in summer; these trends are the opposite of those observed in a contaminated forest area. The half-lives of 137Cs in the concentrations and deposition before 2015 (275 d and 1.11 y) were significantly shorter than those after 2015 (756 d and 4.69 y). The dissolved fractions of precipitation were larger than the particulate fractions before 2015, but the particulate fractions were larger after 2016. The half-lives of 137Cs in the concentrations and deposition were shorter before 2015, probably because the dissolved radio-Cs was discharged from the local terrestrial ecosystems more rapidly than the particulate radio-Cs. X-ray fluorescence analysis suggested that biotite may have played a key role in the environmental behavior of particulate forms of radio-Cs after 2014. However, the causal relationship between the seasonal variations in particle size distributions and the possible sources of particles is not yet fully understood. The current study also proposes a method of evaluating the consistency of a numerical model for radio-Cs resuspension and suggests that improvements to the model are necessary.

X-Ray Fluorescence Analysis of a Manganese Ore

1967 ◽  
Vol 11 ◽  
pp. 150-157
Author(s):  
W. D. Egan ◽  
F. A. Achey
Keyword(s):  
Particle Size ◽  
Sample Preparation ◽  
Size Variation ◽  
Fluorescence Analysis ◽  
Manganese Ore ◽  
Empirical Equations ◽  
Routine Laboratory ◽  
X Ray ◽  
Multiple Regression Technique ◽  
Effect Of Particle Size

AbstractTo replace time-consuming chemical analysis, a procedure was developed for applying X-ray fluorescence to the analysis of a manganese ore. This X-ray fluorescence method is rapid; the total time for both sample preparation and analysis is ½ hr. The method is also simple enough for routine laboratory use. The components determined, the concentration ranges, and the agreement between chemical and X-ray analysis in terms of standard deviation are:The agreements between chemical and X-ray analysis noted for manganese and iron are obtained by correcting for CaO concentration when determining the manganese and for manganese and SiO2 concentrations when determining the iron. The corrections employ empirical equations developed by a multiple regression technique.Sample preparation is reduced to a minimum because it consists of only two steps, pulverization of the manganese ore followed by briquet ring. Four minutes of grinding with Boraxo as the grinding aid gives sufficient uniformity to minimize the effect of particle size variation. The ground mix of manganese ore and Boraxo is pressed into 1.25-in. briquettes for analysis.

A method for adjusting for particle size and matrix effects in the x-ray fluorescence analysis procedure

1967 ◽  
Vol 39 (8) ◽  
pp. 1031-1033 ◽  
Author(s):  
Raymond H. Myers ◽  
Donald. Womeldorph ◽  
Bernard J. Alley
Keyword(s):  
Particle Size ◽  
Matrix Effects ◽  
Fluorescence Analysis ◽  
Analysis Procedure ◽  
X Ray

Study on Preparation of LiNi0.5Co0.2Mn0.3O2 Precursor-Spherical Ni0.5Co0.2Mn0.3O2(OH)2

2015 ◽  
Vol 816 ◽  
pp. 676-681 ◽  
Author(s):  
Xiao Long Qu ◽  
Zheng Fu Zhang ◽  
Jin Cheng ◽  
Xiao Yan Wang
Keyword(s):  
Particle Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tap Density ◽  
Homogeneous Particle ◽  
Co Precipitation ◽  
Scanning Electron

The spherical Ni0.5Co0.2Mn0.3(OH)2 powders were prepared by ammonia-hydroxide co-precipitation method. The influence of different synthesizing factors on the precursors characteristic were investigated. The product prepared with optimized condition has tap density of D≥1.7g·cm-3, and middle particle size D50≈3.6μm. The X-ray diffraction (XRD) results showed that the precursor can be indexed by a hexagonal β-Ni (OH)2 structure. The scanning electron microscope (SEM) results showed that the powders had quasi-spherical pattern and homogeneous particle size distribution.

Application of X-Ray Fluorescence Analysis to Process Control

1961 ◽  
Vol 5 ◽  
pp. 486-499 ◽  
Author(s):  
F. Bernstein
Keyword(s):  
Particle Size ◽  
Process Control ◽  
Sampling Technique ◽  
Fluorescence Analysis ◽  
Particle Sizes ◽  
X Ray ◽  
Direct Sampling ◽  
Precision And Accuracy ◽  
Relationship Of ◽  
The Relationship

AbstractThe application of X-ray fluorescence-analysis methods to process control is discussed. Various methods of sample preparation are reviewed and compared. The use of the direct sampling technique is discussed and consideration is given to the effects of particle size on precision and accuracy of analytical results. The mechanism of these effects if presented, and some general principles concerning the relationship of fluorescent intensities and particle sizes of pure materials and mixtures are derived. Examples of particle-size effects in cement and mining applications are illustrated.

scholarly journals Freeze dried quince (Cydonia oblonga) puree with the addition of different amounts of maltodextrin: physical and powder properties

2018 ◽  
Author(s):  
Hira Yüksel ◽  
Özle Ünlüeroğlugil ◽  
Gülşah Çalışkan Koç ◽  
Safiye Nur Dirim
Keyword(s):  
Adverse Effect ◽  
Moisture Content ◽  
Freeze Drying ◽  
Flow Properties ◽  
Cydonia Oblonga ◽  
Drying Time ◽  
Freeze Dried ◽  
Drying Behavior ◽  
Density Values ◽  
Powder Properties

This study aims to determine the drying behavior of quince puree and as an adverse effect powdered sugar added quince puree with the addition of maltodextrin. The addition of powdered sugar increases the drying time and the total amount of energy and the same time slightly decreases the moisture content and water activity values. The color values and the properties on these values changed both with the addition of maltodextrin and powdered sugar. The density values, flow properties and reconstitution properties are significantly affected by the amount of maltodextrin in plain or powdered sugar added samples. Keywords: quince, freeze-drying, maltodextrin, powder properties 

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