Zainab Albakry, Emad Karrar, Isam A. Mohamed Ahmed, Asmahan A. Ali, Qais Ali Al-Maqtari, Hui Zhang, Gangcheng Wu, Xingguo Wang
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引用次数: 0
Abstract
Black cumin (Nigella sativa L.) seed oil is of high nutritional and pharmaceutical quality as it is rich in polyunsaturated fatty acids and bioactive components, which are greatly affected by oil extraction methods. To date, comparative studies on the effect of solvent, cold press, and supercritical fluid extraction (SEF) on the quality attributes of black cumin seed oil are scarce. In addition, little information is available in the literature about black cumin seed oils extracted with SFE. Therefore, this study was conducted to compare some physicochemical characteristics, fatty acids composition, triacylglycerol, tocopherol, phytosterol, polyphenols, antioxidant activity, phenolic compounds, volatile compounds, antimicrobial activity, functional groups and melting points of oil extracted from black cumin seed by different methods (SFE, cold press, and solvent extraction). In this study, extracted-black seed oils contain high amounts of C18:2 (60.01–58.75%), OLL (37.45–38.87%), γ-tocopherol (243.26–276.46 mg/100 g oil), and polyphenols (314.08–400.02 mg GAE/kg oil). Supercritical fluid extraction (SFE) obtained the highest oil yields (37%). In addition, the oil obtained by SFE has relatively higher unsaturated fatty acids, total tocopherols, phytosterols, and polyphenols than that obtained using cold press and solvent extraction methods. Moreover, SFE-oil had stronger DPPH (1.43 mg/mL) and ABTS (2.69 mg/mL) scavenging activity than solvent-extracted oils. The SFE-oil showed high antimicrobial activity against Staphylococcus aureus and Penicillium roqueforti and contained some characteristics of volatile compounds than that extracted with other extraction methods. Overall, the results suggest that SFE-oil from black seeds is an excellent source of bioactive compounds, antioxidants, and antibacterial and has promising applications in the industry.
Graphical abstract
A comparative study of black cumin seed (Nigella sativa L.) oils extracted with supercritical fluids and conventional extraction methods.
期刊介绍：
This interdisciplinary journal publishes new measurement results, characteristic properties, differentiating patterns, measurement methods and procedures for such purposes as food process innovation, product development, quality control, and safety assurance.
The journal encompasses all topics related to food property measurement and characterization, including all types of measured properties of food and food materials, features and patterns, measurement principles and techniques, development and evaluation of technologies, novel uses and applications, and industrial implementation of systems and procedures.
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