Sorption Isotherms
Mostrando 13-24 de 84 artigos, teses e dissertações.
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13. Thermodynamic properties of Buriti (Mauritia flexuosa) tree gum
Abstract Moisture adsorption and desorption isotherms from buriti tree gum (BG) were obtained at different temperatures (25 to 55 °C) in a water activity range of 0.1 to 0.9. The isotherms were classified as type II. The hysteresis loop and moisture of the monolayer decreased as temperature increased and Halsey’s equation proved able to predict with good
Food Sci. Technol. Publicado em: 02/07/2018
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14. Competitive Adsorption of Dye Species onto Biomass Nanoporous Carbon in Single and Bicomponent Systems
ABSTRACT We first present a cost-effective approach to simultaneously dispose of rutaceae plant waste (the discarded peels of orange, finger citron, pomelo and lemon) to yield biomass nanoporous carbons (BNCs). The adsorption of orange II (OII) and acid chrome blue K (ACBK) from aqueous solutions in single and binary dye systems by four types of BNCs were st
Braz. J. Chem. Eng.. Publicado em: 2018-01
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15. Assessment of radio frequency heating on composition, microstructure, flowability and rehydration characteristics of milk powder
Abstract Radio frequency heating (RFH) provides higher efficiency and more uniform heating zone compared with conventional method. The aim of present work is to evaluate the effect of RFH (at 90 °C for 5 or 10 min) on the changes in composition (protein oxidation and fat distribution), microstructure, flow characteristic and rehydration property of infant m
Food Sci. Technol. Publicado em: 30/10/2017
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16. Powdered tucupi condiment: sensory and hygroscopic evaluation
Abstract Tucupi is a fermented liquid obtained from cassava (Manihot esculenta Crantz), very much appreciated by the traditional cuisine of Northern Brazil. However, there are no scientific reports on its use in the formulation of products. Thus, the present study aimed to elaborate a powdered condiment with tucupi, as well as to assess the product’s senso
Food Sci. Technol. Publicado em: 31/07/2017
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17. Water sorption and water permeability properties of edible film made from potato peel waste
Abstract The water sorption and permeability properties of edible film produced from potato peel waste was investigated under different levels of relative humidity (23, 33, 43, 57, 75% RH) and temperatures (5, 30, 50 °C). The water sorption behaviour and isotherms of the film were investigated by fitting water sorption data to the Peleg model and the Guggen
Food Sci. Technol. Publicado em: 09/03/2017
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18. The effect of gelatin amount on the properties of PLA/TPS/gelatin extruded sheets
Abstract Films and sheets composed by poly (lactic acid) (PLA)/thermoplastic starch (TPS) and TPS/gelatin blends have already been produced and characterized in the literature. However, materials produced with these three biopolymers have not been clearly investigated. In this work, extruded sheets were produced with PLA, TPS (glycerol as plasticizer) and di
Polímeros. Publicado em: 2017-03
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19. Sorption of Sulfachloropyridazine in Brazilian Soils
Sulfonamides are among the most widely employed antibacterial in veterinary medicine. Because a substantial proportion of sulfonamides are excreted unchanged as parent compounds after administration or are excreted as their metabolites through urine and feces, their presence in soils is a matter of concern. Adsorption and desorption are important processes t
J. Braz. Chem. Soc.. Publicado em: 2017-01
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20. Natural Palygorskite as an Industrial Dye Remover in Single and Binary Systems
Layered or fibrous clay minerals are used as adsorbents because they have good performance to remove inorganic and organic species. In this work, a Brazilian fibrous clay mineral was applied to remove Remazol Yellow GR industrial dye from simple and binary systems; this was performed in the presence of lead in the latter case. The adsorption efficiency was i
Mat. Res.. Publicado em: 10/10/2016
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21. Porosity of temporary denture soft liners containing antifungal agents
ABSTRACT Incorporation of antifungals in temporary denture soft liners has been recommended for denture stomatitis treatment; however, it may affect their properties. Objective: To evaluate the porosity of a tissue conditioner (Softone) and a temporary resilient liner (Trusoft) modified by minimum inhibitory concentrations (MICs) of antifungal agents for Ca
J. Appl. Oral Sci.. Publicado em: 2016-10
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22. Modelling the effect of temperature on the water sorption isotherms of chitosan films
Abstract The interaction of the water molecules from the environment with foods and other materials can be evaluated using sorption isotherms. Films and biodegradable films are susceptible to changes in their functional characteristics due to adsorbed water. The amount of moisture that biodegradable films can adsorb depends on the temperature, relative humid
Food Sci. Technol. Publicado em: 21/07/2016
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23. Study of thermodynamic water properties and moisture sorption hysteresis of mango skin
The equilibrium moisture content for adsorption and desorption isotherms of mango skin was determined using the static gravimetric method at temperatures of 20, 26, 33, 38 and 44 oC in the 0.056 to 0.873 water activity range. Both sorption curves show a decrease in equilibrium moisture content as the temperature increasing. The hysteresis effect was observed
Food Sci. Technol. Publicado em: 2015-03
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24. Characterisation of Cassava Bagasse and Composites Prepared by Blending with Low-Density Polyethylene
The main objective of this study was to characterise the cassava bagasse and to evaluate its addition in composites. Two cassava bagasse samples were characterised using physicochemical, thermal and microscopic techniques, and by obtaining their spectra in the mid-infrared region and analysing them by using x-ray diffraction. Utilising sorption isotherms, it
Braz. arch. biol. technol.. Publicado em: 2014-12