Se determinaron las isotermas de adsorción de humedad en harina de yuca a 20 , 25, 30 y 35ºC mediante el método gravimétrico en el intervalo de actividad de. Download scientific diagram | Isotermas de adsorción-desorción de N 2: a) Al- MCM, b) Mn-Al-MCM, c) Jacobsen quiralAl-MCM from publication. Download scientific diagram | Isotermas de adsorción-desorción de la roca BC-1, mostrando la zona de f ormación de la monocapa (M). from publication.

Author: Nem Moogular
Country: Algeria
Language: English (Spanish)
Genre: History
Published (Last): 20 October 2014
Pages: 345
PDF File Size: 9.93 Mb
ePub File Size: 17.61 Mb
ISBN: 924-5-21625-120-7
Downloads: 6239
Price: Free* [*Free Regsitration Required]
Uploader: Tauk

A BET-like three sorption stage isotherm. Using the GAB model to construct sorption isotherms. The behaviour of sorbitan surfactants at the water-oil interface: Evaluation of food moisture sorption isotherm equations. Moisture sorption characteristics of starchy products: Calle San Rafael Atlixco No. Compared with other cereals, oat is considered a source adsorcjon proteins, carbohydrates, fiber, vitamins and minerals Gates, In more recent years, the GAB isotherm equation has been widely used to describe the sorption behavior of foods Isktermas, ; Weisser, ; Iglesias et al.

An alternative to the GAB model for the mathematical description of moisture sorption isotherms of foods. Effect of temperature on the moisture sorption isotherm and water activity shift of two dehydrated food.


Addorcion Surface Thermodynamics, 2nd Ed. These curves were modeled using six equations commonly applied in food.

These results suggest that the recommended storage conditions of oat flakes include: Agrifood Research, Jokioinen, Finland. Glass transition temperatures and water sorption isotherms of cassava starch.

Thermodynamics of moisture sorption in melon seed and cassava, J Food Eng. This fact was attributed to the higher energy levels and lower stability of water molecules as temperature increases, promoting their separation from the binding sites within the food matrix Breett et al. Within such adsorcon system, amorphous zones are more water-accessible than crystalline regions in which the intermolecular interactions between the chains are too strong to allow solvent penetration.

Colloids Surface B 6, This effect causes a depression of the glass transition temperature Tg. Water adsorption isotherms of texturized soy protein. Physical Chemistry of Surface, 6th Ed.

Agronomía Colombiana

Journal of Chemical Physics Vapour sorption equilibrium and other water-starch interactions: Hexane, iso -octane, iso -dodecane and toluene were used as the hydrophobic phase, and bidistilled water was used as the water phase. Academic Press, New York, It has components of minor proportion, such as unsaturated fat and b -glucans, which contribute to ee health and well-being of human beings Peterson, Models that are available in the literature for describing moisture sorption isotherms can be divided into several adsorcio Da Silva, and L.


Journal of Colloid and Interface Science 83, Physical properties for foods. Finally, Szyszkowski-Langmuir constant K L and Gibbs energy of absorption were calculated for the binary systems. isotermad

Isotermas de Adsorción by Arlette Huerta on Prezi

But its water activity a w is much more important, which indicates the water quantity in a food that may be used for developmental biochemical reactions i. Dordrecht, Netherlands, Langmuir adsorption isotherms for different organic solutions of cholesterol. Increasing water activity causes an increase in the availability of the polar sites to the water molecules Al-Muhtaseb et al.

Predicting the variation of the equilibrium moisture content in solid materials, based on fundamentals principles, has not yet been developed for complex systems such as food matrices Al-Muhtaseb et al.

Water sorption isotherms of starch powders. Influence of temperature on sorption equilibrium. Journal assorcion Colloid and Interface Science Materials and Manufacturing Processes 23, Adsorption of gases in multimolecular layers, J.