%0 Journal Article
%T Quality characteristics and microbiological safety evaluation of oils extracted from gamma irradiated almond (Prunus dulcis Mill.) seeds
%A Bhatti
%A I. A.
%A Iqbal
%A M.
%A Anwar
%A F.
%A Shahid
%A S. A.
%J Grasas y Aceites
%D 2013
%I Consejo Superior de Investigaciones Cient赤ficas
%R 10.3989/gya.071512
%X The physicochemical attributes and microbial decontamination of oils extracted from gamma-irradiated almond (Mission and Price varieties) seeds, to the absorbed doses of 2-10 kGy, have been evaluated. Gamma irradiation exerted no considerable effect on the proximate seed composition. The physicochemical properties such as density and refractive index of the oils, extracted from gammairradieted seeds, were almost unaffected; the iodine value decreased while saponification value, unsaponifiable matter and free fatty acids increased. The oxidative status and tocopherol content of almond oils were negatively affected while the fatty acid profile slightly changed due to irradiation stress. Interestingly, these effects on the oil quality attributes were more pronounced at higher irradiation doses (> 6 kGy). Besides, microbial contamination was completely eliminated in the oils irradiated to an absorbed dose of 6.0 kGy. It could be concluded from the present findings that irradiation has a considerably positive or negative effect on some attributes of the almond oil. Therefore, an appropriate magnitude of gamma irradiation should be exercised to treat almond seeds in order to retain maximum nutritive benefits. Se ha evaluado las caracteristicas fisico-qu赤micas y la descontaminaci車n microbiana de aceites extra赤dos de semillas de almendras (variedades Misi車n y Price) gamma-irradiadas a dosis absorbidas de 2-10 kGy. La radiaci車n gamma no ejerce ning迆n efecto considerable en la composici車n pr車ximal de las semillas. Las caracter赤sticas fisico-qu赤micas tales como la densidad y el 赤ndice de refracci車n de los aceites, extra赤dos a partir de semillas gamma-irradiadas, permanecieron casi sin afectar; el 赤ndice de yodo disminuye mientras que el valor de saponificaci車n, la materia insaponificable y los 芍cidos grasos libres aumentan. El estado oxidativo y el contenido de tocoferoles de los aceites de almendra se vieron afectados negativamente, mientras que el perfil de 芍cidos grasos se modifica ligeramente debido al estr谷s de la radiaci車n. Curiosamente, los efectos sobre los atributos de calidad del aceite fueron m芍s pronunciados a dosis de radiaci車n m芍s altas (> 6 kGy). Adem芍s, la contaminaci車n microbiana se elimin車 por completo en los aceites irradiados a una dosis absorbida de 6,0 kGy. Se puede concluir a partir de los presentes hallazgos que la radiaci車n tiene un efecto positivo o negativo considerable en algunos atributos de la aceite de almendras. Por lo tanto, se debe aplicar una magnitud apropiada de radiaci車n gamma para el tratamiento de semillas de almendra con el
%K Absorbed doses
%K Fatty acids
%K Gamma irradiation
%K Microbial decontamination
%K Oxidative stability
%K Proximate composition
%K Tocopherols
%K 芍cidos grasos
%K Composici車n proximal
%K Descontaminaci車n microbiana
%K Dosis absorbida 每 Estabilidad oxidativa
%K Radiaci車n gamma
%K Tocoferoles
%U http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1410/1405