83A-12 |
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J. J. GONZÁLEZ-CABRIALES, G. Tovar Hernández, J. A. Ramírez de León, and M. Vázquez. Food Science and Technology, Universidad Autónoma de Tamaulipas, UAM Reynosa Aztlán, Calle 16 y Lago de Chapala, Reynosa, Tamaulipas, 88740, Mexico Pectins are important constituent of foods because helps to reduce dietary cholesterol but their use as additive in meat products has been limited because they have a negative effect in mechanical properties. Recently the use of amidated low methoxyl pectins in restructured fish products has been proposed because they can improve slightly the mechanical properties of fish gels. The aim of this work was to determine the effect of amidated and no-amidated Low Metoxil Pectins(LMP) in presence of ionic calcium in the mechanical properties of restructured fish products. Mexican flounder (Ciclopsetta chittendenni) was obtained from fishermen in Matamoros, Tamaulipas. Two different pectins (LMP-32 non-amidated pectin and LMP35 amidated pectin) at four different concentrations 0 (control), 1, 2 and 3% with four levels of calcium calcium chloride (0 control, 0.2, 0.4 and 0.6%) were obtained. Fish pastes were incubated at 40°C for 30 min and cooked at 90 °C for 15 min. The effect of treatments on water holding capacity, textural profile analysis, punction test, consistence with inverse extrusion and color by Hunterlab were measured. Hardness and breaking force were increased by using 1% LMP35 and 0.4% calcium. Higher levels of pectins affected induced a weakening in the gel structure. Inverse extrusion was appropriate to measure changes in firmness and consistency of fish pastes. Both pectins changed significantly the chrome and hue colour attributes, but all fish products remained in the grayish zone. Results obtained showed that amidated low-methoxyl pectin added with calcium chloride are appropriated to obtain fish products with higher mechanical properties and containing nutritional added value: healthy fiber and calcium.
Session 83A, Aquatic Food Products: Byproducts, mince and surimi
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