This research has demonstrated that the dielectric method can be used successfully for grain moisture measurements for diverse
grain types over wide ranges of temperatures if the grain moisture content is below certain (grain-specific) threshold values.
These high-moisture limits were estimated. Optimum temperature correction coefficients for 149 MHz moisture measurements were
determined for grain samples at different moisture levels. This information should be very helpful for grain moisture meter
manufacturers and for moisture meter users who need to determine grain moisture contents at temperature extremes to be able
to market grain more efficiently.
The Unified Grain Moisture Algorithm is
capable of improved accuracy and allows the combination of many grain types
into a single “unified calibration”. The purposes of this research were to
establish processes for determining unifying parameters from the chemical and
physical properties of grains. The data used in this research were obtained as
part of the United States Department of Agriculture-Grain Inspection, Packers
and Stockyards Administration's Annual Moisture Calibration Study. More than
5,000 grain samples were tested with a Hewlett-Packard 4291A Material/Impedance
Analyzer. Temperature tests were done with a Very High Frequency prototype
system at Corvinus University of Budapest. Typical chemical and physical
parameters for each of the major grain types were obtained from the literature.
Data were analyzed by multivariate chemometric methods. One of the most
important unifying parameters (Slope) and the temperature correction
coefficient were successfully modeled. The Offset and Translation unifying
parameters were not modeled successfully, but these parameters can be estimated
relatively easily through limited grain tests.
in commercial and industrial applications for power generation in diesels or boilers [ 4 – 6 ]. Distillers grains (DGs) are a cereal byproduct of the distillation process. It has been estimated that the world produces as much as 60 million tonnes of
Authors:Balázs Madarász, Gergely Jakab, Zoltán Szalai, and Katalin Juhos
Ballenegger R. & di Gléria J., 1962. Talaj- és trágyavizsgálati módszerek. Mező-gazdasági Kiadó. Budapest.
Beuselinck, L. et al., 1998. Grain-size analysis by laser diffractometry: comparison with the sieve-pipette method. Catena
Authors:J. Solecki, J. Solecki, J. Solecki, J. Solecki, S. Michalik, S. Michalik, S. Michalik, and S. Michalik
The adsorption of 85Sr on grain fractions isolated from four different types of soil was studied. The influence of pH, concentration and presence
of calcium ions on the process was investigated. The adsorption process depends mainly on pH, grain size of the solidandthe
type of soil. Ca2+in the system is lowering the adsorption of 85Sr.
Authors:J. Chen, G. Grant, W. Boivin, M. Heinrich, A. Kerr, and R. Tkachuk
A study has been carried out to determine the levels of radioisotopes in five Canadian grains from pre-(1985) and post-Chernobyl (1986) crop years. In addition, the radioisotope levels were determined in grains from the 1988 crop year consisting of wheats, oats, barley, corn and oil seeds which included flax, sunflower and canola. The grain and oil-seed samples were ashed to reduce their volume, and the gammaemitters137Cs and40K were determined using a high-purity germanium detector and a high-purity germanium well detector. The90Sr activity measurements required further ashing of the samples followed by chemical separations and -counting of the separated daughter90Y. The results for the 1985, 1986 and 1988 crop years are discussed and compared with results from grain crops obtained during years of atmospheric bomb tests in the 1950's.
Authors:Z. Homonnay, A. Vértes, D. Beke, I. Gödény, and E. Kuzmann
Iron was diffused into aluminium along grain boundaries and studied by Mössbauer spectroscopy. The Mössbauer spectrum of the investigated sample contained one doublet with isomer shift =0.360/5/ mm s–1 /relative to -iron/ and quadrupole splitting =0.84/l/ mm s–1. These results suggest that the iron atoms in the grain boundaries of aluminium have environment very similar to that which is present in amorphous iron /III/ oxides.