scholarly journals An e-function nomo-gram, with special reference to the determination of equilibrium-moisture content and capillary conductivity of soil samples.

1965 ◽  
Vol 13 (1) ◽  
pp. 63-71
Author(s):  
P.T. Stol
Keyword(s):  
Moisture Content ◽  
Special Reference ◽  
Equilibrium Moisture Content ◽  
Soil Samples

scholarly journals Determination of elastic parameters of grain with oedometric and acoustic methods

2012 ◽  
Vol 49 (No. 2) ◽  
pp. 56-60 ◽  
Author(s):  
M. Stasiak
Keyword(s):  
Hydrostatic Pressure ◽  
Moisture Content ◽  
Shear Wave ◽  
Equilibrium Moisture Content ◽  
Shear Wave Velocity ◽  
Modulus Of Elasticity ◽  
Uniaxial Compression Test ◽  
Elastic Parameters ◽  
Acoustic Methods

Values of modulus of elasticity E and Poisson’s ratio   were determined with two methods adopted from geotechnique. First approach used was a method proposed by Sawicki (1994). This type of examination was applied to estimate values of E and v for wheat and rapeseed beddings for five levels of moisture content ranging from 6% to 20%. Modulus of elasticity E of wheat was found to decrease with an increase in moisture content. With the second method values of E were determined based on measurement of shear wave velocity. Tests were performed for bedding of wheat and rapeseed under equilibrium moisture content. Values of modulus of elasticity were found to depend of hydrostatic pressure and were higher then those determined in uniaxial compression test.

scholarly journals Determination of desorption isotherms, latent heat and isosteric heat of pequi diaspore

2016 ◽  
Vol 20 (5) ◽  
pp. 493-498 ◽  
Author(s):  
Kelly A. de Sousa ◽  
Osvaldo Resende ◽  
Bruno de S. Carvalho
Keyword(s):  
Moisture Content ◽  
Latent Heat ◽  
Equilibrium Moisture Content ◽  
Sorption Isotherms ◽  
Isosteric Heat ◽  
Static Method ◽  
The One ◽  
Content Range ◽  
Water Sorption Isotherms

ABSTRACT The objective was to determine water sorption isotherms of diaspores of pequi fruits in order to obtain information on the amount of water that this product desorbs at the temperatures of 10, 20, 30 and 40 °C and water activities from 0.20 to 0.89, adjusting different mathematical models to experimental data, and to determine its latent heat and isosteric heat. The equilibrium moisture content was obtained through the indirect static method, using the device Hygropalm Model Aw 1. The Modified Henderson model was the one that best fitted the data and was selected to predict the equilibrium moisture content of pequi diaspore. It was observed that the higher the temperature for the same equilibrium moisture content (% d.b.), the higher the water activity values. As temperature values increased, there was a reduction in the vaporization latent heat of the product. Isosteric heat values of diaspores of pequi fruits in the moisture content range of 4.02 to 16.63 (% d.b.) varied from 2,776.49 to 2,558.39 kJ kg-1.

scholarly journals Performance of an Accelerated Method for the Determination of Equilibrium Moisture Content

2006 ◽  
Vol 12 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Md. Ashraful HAQUE ◽  
M.K.K. SUDEEPA ◽  
Naoto SHIMIZU ◽  
Toshinori KIMURA
Keyword(s):  
Moisture Content ◽  
Equilibrium Moisture Content

scholarly journals Effects of Moisture Content and Solvent Additive on Headspace Solid-Phase Microextraction of Total Petroleum Hydrocarbons from Soil

2012 ◽  
Vol 14 (4) ◽  
pp. 331 ◽  
Author(s):  
M.B. Alimzhanova ◽  
B.N. Kenessov ◽  
M.K. Nauryzbayev ◽  
J.A. Koziel
Keyword(s):  
Moisture Content ◽  
Petroleum Hydrocarbons ◽  
Water Surface ◽  
Solid Phase Microextraction ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Soil Samples ◽  
Total Petroleum Hydrocarbons ◽  
Water Mixture

Present paper describes optimization of the method of quantitative determination of total petroleum hydrocarbons in soil samples using headspace solid - phase microextraction (SPME) in combination with gas chromatography - mass spectrometry (GC-MS). Effects of moisture content and solvent additives<br />were studied. It was established that an increase of the moisture content in soil leads to an increase of the response of petroleum hydrocarbons reaching its maximum at 15-20% depending on the soil type and concentration of total petroleum hydrocarbons followed by its gradual decrease. For the same concentration of petroleum hydrocarbons, an increase of moisture content in soil from 0 to 20% may lead to a 15x increase of total petroleum hydrocarbons response by solid - phase microextraction. Determination of total petroleum hydrocarbons in soils by SPME -GC-MS without moisture control of samples may lead to large errors, especially at low concentrations. It was established that addition of the solvent to a soil-water mixture allows dissolution of an oil film on the water surface and provides better extraction of hydrocarbons from soil to water phase. To avoid effect of moisture content on the extraction efficiency and more precise analysis of the real samples, addition of the excess distilled water must be done. Addition of the polar organic solvent to a soil-water mixture (10% isopropanol) allows dissolution of an oil film on the water surface and provides linear dependence of extraction efficiency vs total petroleum hydrocarbons content in soil. Testing of the optimized method on model soil samples provided quantitative data, results being in 30-120% range from the real values.

scholarly journals Determination of Equilibrium Moisture Content in Trade Distribution

2020 ◽  
Vol 1 (1) ◽  
pp. 25-29
Author(s):  
David S S Marpaung ◽  
Anggia Indryani ◽  
Ayu Oshin Yap Sinaga
Keyword(s):  
Moisture Content ◽  
Equilibrium Moisture Content ◽  
Trade Distribution
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