Common Kilka oil and its primary and secondary oxidative dynamics stabilized by different variants of clove essential oil

The objective of this study was to investigate the properties of clove essential oil extracted by different microwave-assisted methods and to evaluate its effects on the stability of common Kilka oil. Each of these methods was hypothesized to yield a clove essential oil that would have a distinguishable composition and effect when added to common Kilka oil by maintaining its oxidative stability. The oxidation of common Kilka oil was examined by accelerated oxidation using the active oxygen method and Rancimat test. The clove essential oil extracted by microwave-assisted hydrodistillation showed the highest induction period according to the active oxygen method (16.56 h) and the Rancimat induction period (3.64 h) in common Kilka oil and its antioxidant activity was comparable to that of BHT (16.59 h and 4.34 h, respectively) and tocopheryl acetate (16.30 h and 4.02 h, respectively). Furthermore, the microwaveassisted hydrodistillation method resulted in the amount of eugenol that exhibited the highest antioxidant capacity for preserving PUFA in common Kilka oil. Ultimately, clove essential oil can become an efficient natural antioxidant for the oxidative stability of common Kilka oil.

Comparison of Nutritional Value and Functionalities of Palm Oil Fractionates with Lards

The cholesterol and α-VE content, active oxygen method value, solid fat content of three kinds of palm oil fractionates and five kinds of lard products were investigated. The results obtained were as follows. Firstly, palm oil has lower cholesterol content but higher α-VE content and higher AOM value than lard. Secondly, refined palm oil, palm stearin and palm olein has almost the same plasticity as leaf lard, bone lard and skin lard, respectively. All the results have showed that palm oil is of substitutability for lard.