Quality of oil extracted by cold press from Nigella sativa seeds incorporated with rosemary extracts and pretreated by microwaves

IF 3.8 4区工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY

Green Processing and Synthesis Pub Date : 2023-01-01 DOI:10.1515/gps-2022-8149

Ali Ashrafi, S. Azadmard‐Damirchi, J. Hesari

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引用次数: 2

Abstract

Abstract Black cumin (Nigella sativa) seed (BS) oil has high a peroxide value (PV) and acid value (AV). In this study, BS was incorporated with different levels of rosemary extracts as a natural antioxidant source before and after pretreatment by microwaves. Based on the oil extraction yield (33%), PV (8.4 meq O2 per kg oil), and AV (3.2 mg KOH per gram oil), the optimum condition was determined as microwave radiation for 120 s and, after that, moisturizing by the extract at 4% level. AV and PV were lower, and chlorophylls, carotenoids, polyphenols, thymoquinone, and tocopherols content were higher in oil extracted from pretreated BS than oil extracted from control BS. Reduction and loss of bioactive components occurred in oil samples during the 120 days of storage; however, it was higher in the control sample. There were no significant differences (p < 0.05) in the fatty acid composition of oil samples; however, oxidation and reduction of linoleic acid in the control oil sample were higher (4.2%) than the oil extracted from pretreated BS (2.5%). In conclusion, the oil extracted from the pretreated BS had higher oil extraction yield, high bioactive components, and stability; therefore, microwave radiation and incorporation of rosemary extract before oil extraction from BS is suggested.

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用冷压榨法从黑草种子中提取精油，并加入迷迭香提取物，用微波预处理

摘要黑孜然籽油具有较高的过氧化值（PV）和酸值（AV）。在本研究中，BS在微波预处理前后加入不同水平的迷迭香提取物作为天然抗氧化剂。基于采油产量（33%），PV（8.4 meq O2/kg油）和AV（3.2 mg KOH/g油），确定最佳条件为微波辐射120 s，然后用4%的提取物保湿。预处理BS提取的油中的AV和PV较低，叶绿素、类胡萝卜素、多酚、胸腺醌和生育酚含量高于对照BS提取的石油。在储存的120天内，石油样品中的生物活性成分减少和损失；然而，在对照样品中它更高。油样的脂肪酸组成无显著差异（p<0.05）；但对照油样品中亚油酸的氧化还原率（4.2%）高于预处理BS提取的油（2.5%）；因此，建议在从BS中提取油之前进行微波辐射并掺入迷迭香提取物。

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来源期刊

Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

6.70

自引率

9.30%

发文量

审稿时长

7 weeks

期刊介绍： Green Processing and Synthesis is a bimonthly, peer-reviewed journal that provides up-to-date research both on fundamental as well as applied aspects of innovative green process development and chemical synthesis, giving an appropriate share to industrial views. The contributions are cutting edge, high-impact, authoritative, and provide both pros and cons of potential technologies. Green Processing and Synthesis provides a platform for scientists and engineers, especially chemists and chemical engineers, but is also open for interdisciplinary research from other areas such as physics, materials science, or catalysis.