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The aroma profile of aromatized olive oil was determined in this study. The primary objective was to investigate the transition of major aroma compounds from rosemary and olive fruit during the kneading step of olive oil production by response surface methodology. For this purpose, temperature, time, and amount of rosemary leaves were determined as independent variables. The results indicated that temperature and time did not affect the transition of target compounds, but rosemary leaves addition had a strong influence on transition, especially for characteristic aroma compounds of this herb. Adequacies of developed models were found to be high enough to predict each aromatic component of interest.

N. sativa seeds, commonly known as black seeds, are used for headaches in traditional medicine by many Asian, Middle Eastern and Far Eastern countries. It is used to treat cough, abdominal pain, diarrhea, asthma, rheumatism and other diseases. The seeds contain both fixed and essential oils, proteins, alkaloids and saponin. Much of the biological activity of the seeds has been caused to be due to thymoquinone, the major component of the essential oil, but which is also present in the fixed oil. The essential oil of black cumin seeds, Nigella sativa L., was tested for a possible antioxidant activity. In our study, it was aimed to increase the yield of essential oil in hydrodistillation of black seed oil in the presence of surfactant (Tween 80). While traces of essential oil were obtained in hydrodistillation of black seed seeds under similar conditions, 2.1% essential oil was obtained in the presence of surfactant. In this study, we also measured the amount of thymoquinone compound in aromatic water. The proportion of thymoquinone passing into the aromatic water show that it is necessary to consume the correct amount of water and essential oil, which is significantly measurable by GC MS and HPLC. We used HPLC for the determination of the amount of thymoquinone in aromatic water, and GC-MS was used in the analysis of Nigella essential oil components. According to the results of analysis, thymoquinone was found to be 790 ± 12 ppm in aromatic water and 45.78% in essential oil. Sufficient analytic work was performed with this method and the results were reported in the study.

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