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Interactions between water and EVOH food packaging films / Interacciones entre el agua y películas de EVOH para el envasado de alimentos 全文
2000
Aucejo, S. | Catalá, R. | Gavara, R.
The transport of water in four EVOH copolymers commonly used in high barrier food packages was characterized through permeation (continuous flow) and gravimetric experiments at different rela tive humidities and 23 ± 2°C. Water sorption isotherms were fitted with the D'Arcy and Watts' equa tion. From these data, the value of the solubility coefficient (S, as defined by Henry's law) was deter mined and was found constant within a 0.2-0.75 water activity (a w) range. Water uptake at the same a w increased as the EVOH ethylene content decreased. The permeability coefficient (P) for water through EVOH was determined as a function of water activity. The permeability was constant within the range of 0.3-0.75 a w and decreased with EVOH ethylene content. At high relative humidities (a w > 0.75) the value of permeability increased by up to two orders of magnitude. In this range, the higher the ethylene content the lesser the value of P.
显示更多 [+] 显示较少 [-][Water uptake in swine farms] | Consumo de agua en las explotaciones porcinas
Quiles, A. E-mail:quiles@um.es | Hevia, M.L.(Universidad de Murcia (España). Facultad de Veterinaria)
Water consumption and sweet potato yield | Consumo de agua y rendimiento del boniato
2000
Pujol Osle,, P. | Boicet Fabre, T. | Verdecia Salgado, J. | Golacheca Allegue, M. (Universidad de Granma (Cuba))
[The importance of registering water consumption] | La importancia de registrar el consumo de agua
2010
Brumm, M.
[The water as nutrient in swine production] | El agua como nutriente en la producción porcina
2002
Palomo Yagüe, A.
[Importance of the good use of drinking water] | Importancia del buen uso del agua de bebida 全文
2007
Lorenzo González, J.L. | Rosas Valverde, M.L.
[Water consumption and saving strategies in pig husbandry] | Consumo de agua y estrategias de ahorro en la ganadería porcina
2008
García González, M.C., Instituto Tecnológico Agrario de Castilla y León, Valladolid (España)
[Factors affecting the water consumption in poultry farming] | Factores que afectan al consumo de agua en la producción avícola
2001
Barragán, J.I.
Manejo del agua [Glycine max].
1995
Neumaier N. | Nepomuceno A.L.
[The water movement through a plant: how a plant uses water and which is the interaction between roots and circulating air] | El movimiento del agua a través de las plantas: cómo una planta utiliza el agua y cuál es la interacción entre raíces y aire circulante
2009
Lee, A.
