Chemical characterization and free radical scavenging capacity of oils obtained from Torreya grandis Fort. ex. Lindl. and Torreya grandis Fort. var. Merrillii: A comparative study using chemometrics

Shi, Longkai; Mao, Jia-Hui; Zheng, Liping; Zhao, Chen; Jin, Qingzhe; Wang, Xingguo

doi:10.1016/j.indcrop.2018.02.037

Cited by 38 publications

(37 citation statements)

References 21 publications

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“…The highest peroxide value was observed in the RP walnut oil, but the value was also lower than generally recommended for commercial edible crude vegetable oils (≤10). The SFE walnut oil had low levels of peroxide value, indicating that only a small amount of peroxides and hydroperoxide were generated, and the degree of lipid oxidation was low …”

Section: Resultsmentioning

confidence: 88%

Comparison of Different Processing Methods of Iron Walnut Oils (Juglans sigillata): Lipid Yield, Lipid Compositions, Minor Components, and Antioxidant Capacity

Gao

Liu

Jin

et al. 2018

Euro J Lipid Sci & Tech

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A comparison study is performed on different processing methods of iron walnut oils (Juglans sigillata). Processing methods here include cold‐pressing (CP), roasting‐pressing (RP), n‐hexane extraction (HE), subcritical butane extraction (SBE), and supercritical carbon dioxide extraction. The lipid yield, physicochemical properties, lipid compositions, minor components, and antioxidant capacity of iron walnut oils are analyzed. Different processing methods do not affect the fatty acid compositions and triacylglycerol compositions of iron walnut oil. The lipid yields of pressing process (42.63–44.12%) is lower than that of the extraction process (48.13–63.44%). By multiple linear regression analysis, the results about the correlation between minor components and antioxidant capacity show that the RP process with high number of polyphenols (52.91 mg kg−1) indicates the highest antioxidant activity (DPPH: 574.73, FRAP: 111.80, ABTS: 498.53, ORAC: 523.34 µmol TE kg−1, respectively). Considering health and nutritional value of oil, RP can be a promising method for future iron walnut oil processing. Practical Applications: Iron walnut (Juglans sigillata) is a special walnut variety in China. In this study, five different processing methods of iron walnut oil are evaluated. The new iron walnut oil processing method is beneficial to the development of iron walnut oil. The authors show that lipid composition of tested oils is relatively stable, while their minor components contents are significantly different. Oil antioxidant capacity is mainly related to polyphenols. Roasting‐pressing can obviously improve the antioxidant activity of the iron walnut oil. This information has important directive to the nutritional value and industrial production of iron walnut oil. Iron walnut oil is obtained from Juglans sigillata by different processing methods, including cold‐pressing, roasting‐pressing, n‐hexane extraction, subcritical butane extraction, and supercritical carbon dioxide extraction. The lipid yield, physicochemical properties, lipid compositions, minor components, and antioxidant capacity (DPPH, FRAP, ABTS, and ORAC) are analyzed. Models deduced by multiple linear regression are recognized as acceptable for predicting the antioxidant capacity of the iron walnut oil.

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Section: Resultsmentioning

confidence: 88%

Comparison of Different Processing Methods of Iron Walnut Oils (Juglans sigillata): Lipid Yield, Lipid Compositions, Minor Components, and Antioxidant Capacity

Gao

Liu

Jin

et al. 2018

Euro J Lipid Sci & Tech

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“…The DPPH radical-scavenging activity and polyphenols content were highly correlated, and the polyphenols content was similar in FT and UT oil. The increasing content of tocopherols (61.6 μg TE/mL, about 24 μmol TE/100 g [22]) cannot influence the DPPH activity between FT oil and UT oil.BothUT and FT oil showed equal DPPH scavenging ability to the reported Torreya oils (between 422 and 509 μmol TE/100 g) [11,12,14]. The IC 50 of FT and UT oil was about 6.0 μg/mL, lower than that of the chemically synthesized BHT (about 1.75 μg/mL) but stronger than the EGCG (90 μg/ML [23]).…”

Section: Resultsmentioning

confidence: 99%

“…The total lipid content in the T. fargesii kernels was 50.3 ± 2.6%. The oil content in the T. grandis kernels ranged from 45% to 55% depending on the growth region [10,11,12,14]. The oil content of the kernels was comparable to that of rapeseed and sunflower seed (about 35–50%).…”

Section: Resultsmentioning

confidence: 99%

“…Torreya grandis cv. merrillii ( T. grandis ) is mainly distributed in Southeast China.Its kernel oil contains about 10–13% sciadonic acid [10,11,12]. Recently, several studies reported that kernel oil of T. grandis has strong antioxidant activity in radical scavenging tests [13,14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The content of PMI-PUFA contributes to the pharmacological activity and nutritional value of Torreya oil and its final commercial products [6,7]. We noted that the kernel oil of Torreya species contains about 10% saturated fatty acid and 20%–30% monounsaturated oleic acid [11,12], which is suitable for concentrating their unsaturated fatty acids by fractionation. In this work, we investigated the use of conventional methods of fractionation to produce Torreya oil with high anti-inflammatory activity.…”

Section: Introductionmentioning

confidence: 99%

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Fractionated Antioxidant and Anti-inflammatory Kernel Oil from Torreya fargesii

et al. 2019

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Polymethylene-interrupted polyunsaturated fatty acids (PMI-PUFAs) are emerging functional lipids with proven antioxidant and anti-inflammatory effects. In this study, a typical PMI-PUFA, sciadonic acid (C20:3, 5c 11c 14c), was enriched in the kernel oil of Torreya fargesii (T. fargesii) by fractionation. Fractionated kernel oil of T. fargesii (containing 25% sciadonic acid) showed equal stability and similar radical scavenging ability compared with the non-fractionated oil. In anti-inflammatory tests, fractionated kernel oil was shown to inhibit the activity of phosphodiesterase (PDE-5, efficiency 80% at 133.7 μg/mL) and lipoxygenase-5 (LOX-5, efficiency 65% at 66.7 μg/mL) more effectively than the non-fractionated oil. This shows that increasing the amount of sciadonic acid can enhance the anti-inflammatory effect of the kernel oil. This research also indicates that fractionation is a feasible way to obtain sciadonic acid–rich functional oil with potential pharmacological effects.

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Physicochemical Characteristics and Functional Properties of Seed Oil from Four Different Cultivars of S. Wilsoniana

Wen

Sun

et al. 2021

Euro J Lipid Sci & Tech

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A study is conducted to explore the under‐utilized resources of Swida wilsoniana seed oil (SWSO). Physicochemical properties of four cultivars of SWSO and their fatty acid composition, phytochemicals, oxidation stabilities, and antioxidant capacities are evaluated. The results indicate that SWSO is abundant in unsaturated fatty acids (76.02–82.43%) and contained a high phytochemical content. Gamma‐tocotrienol (206.03 ± 0.21–215.84 ± 0.17 mg kg−1), β‐amyrin (107.12 ± 0.27–192.30 ± 1.17 mg kg−1), and betulin (32.82 ± 0.59–88.20 ± 0.37 mg kg−1) are major components of SWSO compared to familiar oils. The induction period (5.08–5.80 h) is negatively correlated with unsaturated fatty acid content (r = −0.948**, P < 0.01), particularly linoleic acid (r = −0.938**, P < 0.01). A high antioxidant capacity is observed in SWSO which is primarily attributed to tocopherol/tocotrienol content (0.832*–0.963**). SWSO can be regarded as a new resource and a high‐quality ingredient for dietary foods and other applications. Practical applications: The favorable physicochemical characteristics and functional properties of SWSO indicate that it may be used as a novel and daily edible oil through moderate refining. It also exhibits promise to protect the artery and liver as a special oil for use as shortening and frying because of its ideal FAC and antioxidant capacity. In addition, SWSO may be suitable for the cosmetics industry. Furthermore, more varieties should be obtained to verify and refine the correlations between chemical composition and antioxidant properties. In addition, the specific phenolics in SWSO should be identified to better characterize the relationship between polyphenol content and antioxidant capacity.

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Chemical characterization and free radical scavenging capacity of oils obtained from Torreya grandis Fort. ex. Lindl. and Torreya grandis Fort. var. Merrillii: A comparative study using chemometrics

Cited by 38 publications

References 21 publications

Comparison of Different Processing Methods of Iron Walnut Oils (Juglans sigillata): Lipid Yield, Lipid Compositions, Minor Components, and Antioxidant Capacity

Comparison of Different Processing Methods of Iron Walnut Oils (Juglans sigillata): Lipid Yield, Lipid Compositions, Minor Components, and Antioxidant Capacity

Fractionated Antioxidant and Anti-inflammatory Kernel Oil from Torreya fargesii

Physicochemical Characteristics and Functional Properties of Seed Oil from Four Different Cultivars of S. Wilsoniana

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