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Showing 1 to 20 of 21 for “"Sorption isotherm"”.
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Investigating the glassy to rubbery transition of polydextrose and corn flakes using automatic water vapor sorption instruments, DSC, and texture analysis
… was to investigate the usefulness of automated sorption isotherm methods for determining the glassy to rubbery transition in a model amorphous food material, polydextrose. The automated sorption isotherms were obtained from 20 to 40°C at 5°C intervals using dynamic vapor sorption (DVS). The DVS …
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Porosity studies of isoreticular mixed-ligand metal-organic frameworks
… higher water vapour and carbon dioxide 195 K sorption as well as significant hysteresis upon desorption of carbon dioxide 195 K. This hysteresis behaviour of 1′ is interchanged with 2′ for water vapour sorption at 298 K. Sorption isotherm inflection points indicate that structural changes …
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Moisture transport and fixation in porous materials at high moisture levels
… calculated from the relation between the water sorption coefficients and the initial water content. The method is based on Boltzmann transformation. Knowledge of moisture storage capacity over the hygroscopic range is essential when calculating the moisture content. Generally storage capacity is …
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Natural transformation and growth inhibition of azotobacter vinelandii in the presence of adsorbed oxytetracycline
… antimicrobial resistance, the mechanism of OTC adsorption to a clay soil was investigated using sorption isotherm experiments and modeling, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). Sorption data showed a good fit with a cation-exchange capacity sorption model. …
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Moisture redistribution in screeded concrete slabs
… of redistribution is presented. In addition, sorption isotherms including scanning curves were determined in a sorption balance for materials used in the floor constructions, viz, w/c 0.65 concrete, w/c 0.4 concrete, w/c 0.55 cement mortar, and Floor 4310 Fibre Flow, a self leveling flooring …
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An experimental apparatus for the measurement of sorption isotherms of moisture in porous building materials
… apparatus and test procedure to measure the sorption isotherm of moisture in porous building materials was developed and tested for its reliability and accuracy. The apparatus shows excellent potential for determining reliable moisture storage property data. The data are used in heat and …
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Phosphorus availability in amended minesoils as measured by forage Growth and soil tests
… ppm P in the soil solution as determined by the sorption isotherm method. However, the optimum P concentration was 0.1 ppm P in limed plots the second year. A second set of field experiments compared lime, organic matter, and P treatments (from 0 to 0.2 ppm in the soil solution if lime was …
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Modification of Wood Fiber with Thermoplastics by Reactive Steam-Explosion
… analysis of dispersion of PO with wood fiber, sorption properties of co-processed material, chemical analysis of fractionated components, and morphological investigation of co-processed material. Two additional studies are listed in the appendices that relate to adsorption of amphiphilic …
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Experimental and Modeling the Flow Properties of Distillers Dried Grains (DDG) with Varying Soluble Levels and Moisture Contents
… improve the flowability of DDGS.<br /> EMC isotherms for DDGS at various relative humidity and temperatures are essential to optimize its storage and transportation conditions. DDGS showed a type III isotherm behavior, which is common in high sugar foods. Nine traditional isotherm models …
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Advancing Step-Growth Polymers: Novel Macromolecular Design and Electrostatic Interactions in Polyesters and Polyurethanes
… despite the presence of ionic interactions. Sorption isotherm experiments revealed TBP polyurethanes displayed similar water sorption profiles to the noncharged analogue and lower water absorptivity compared to TEP. The phosphonium polyurethanes displayed significantly improved tensile …
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Studies of moisture and alkalinity in self-levelling flooring compounds
… simultaneous determination of both the moisture sorption isotherms and of diffusion coefficients, were developed. <p> Measurements were performed of such moisture properties as the chemical binding of water, the physical binding of it (the moisture sorption isotherm), moisture transport …
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Redistribution of moisture and ions in cement based materials
… of redistribution is presented. In addition, sorption isotherms including scanning curves were determined in a sorption balance for materials used in the floor constructions, viz, w/c 0.65 concrete, w/c 0.4 concrete, w/c 0.55 cement mortar, and Floor 4310 Fibre Flow, a self levelling flooring …
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Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials
… based materials are closely related to moisture sorption and moisture transport properties. Therefore, it is important to study these properties, both theoretically and practically. This work is an experimental investigation in this field. Nowadays, the cement industry produces cements with …
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Comparison of the new vapor sorption analyzer to the traditional saturated salt slurry method and the dynamic vapor sorption instrument
… the water activity (aw) concept is the moisture sorption isotherm, which plots the moisture content of a material as a function of aw at the same temperature. Moisture sorption isotherms are useful for a variety of processing and product stability applications. The most common methods of …
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Evaluation of flow models and pollutant retention isotherms for their application to rain garden bioretention
… method of modelling capture was identified as a sorption isotherm. Thus a dual-permeability heavy metal sorption model was developed; this was based on an intensive literature review of current best practice in both hydrological modelling and pollutant retention fields with respect to rain garden …
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Nonisothermal moisture transport in wood
… on classical thermodynamics. All models require sorption isotherm and heat of sorption data; and in some cases, the activation energy for moisture transport through wood. Adsorption and desorption isotherm data were obtained at 30°C for both species. Heat of sorption and moisture transport …
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Cellular level investigation of water interaction with acetylated and formalized wood
Asetyloidun ja formalisoidun männyn (Pinus sylvestris L.) pintapuun reagointia veden kanssa tutkittiin solutasolla. Muokkaamatonta puuta käytettiin vertailunäytteenä. Asetyloinnissa, etikkahappoanhydridin asetyyliryhmä sitoutui OH-ryhmän kanssa täyttäen soluseinää. Formalisointi puolestaan johti …
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Moisture properties of self-levelling flooring compounds
… measurements of moisture diffusion and moisture sorption are presented. Measurements were made with three commercial SLC. Later in the project, results from this report will be used when the function of SLC in flooring constructions will be investigated. These investigations will mainly concern …
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