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        Optimizing the extraction of essential oil from cinnamon leaf (Cinnamomum verum) for use as a potential preservative for minced beef

        Yitbarek Reta Merid,Admassu Habtamu,Idris Fekiya Mohammed,Fentie Eskindir Getachew 한국응용생명화학회 2023 Applied Biological Chemistry (Appl Biol Chem) Vol.66 No.-

        Cinnamon leaf essential oil extraction using steam distillation method is a time-consuming and energy-intensive process. Furthermore, a lower yield and a higher rate of product degradation are this method’s main drawbacks. Thus, the goal of this research is to optimize the extraction process parameters of cinnamon leaf essential oil in response to maximizing the yield while retaining quality by using response surface methodology (RSM). The application of extracted essential oil on minced beef to assess its preservative effect was also the other objective of this research. Extraction time (120–210 min), extraction temperature (105–115 ℃), and feed mass (300–600 g) were the chosen independent variables of the optimization experiment using central composite design (CCD). Furthermore, the extracted essential oil’s antibacterial and microbiological preservative activity on minced beef was evaluated. At extraction time of 175.43 min, extraction temperature of 105 °C, and a feed mass of 600 g, the optimum predicted value of cinnamon leaf essential oil yield and cinnamaldehyde concentration (% area) was 2.9% and 34.6%, respectively. Moreover, the second-order polynomial equation fits the experimental data for 20-run experimental data. The chemical composition of cinnamon leaf essential oil extracted at optimal conditions was dominated by eugenol (60.68%) and cinnamaldehyde (33.94%). Additionally, the optimally extracted cinnamon essential oil inhibited the growth of bacteria, particularly gram-positive bacteria. After twenty-one days of storage at 4 °C, total viable count of minced beef seasoned with cinnamon essential oil at concentration of 1.2% (v/v) was lower than 106 CFU/g. To conclude, optimized cinnamon leaf essential oil extraction process provides better yield while retaining its functional properties.

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