High efficiency preparation of standard grade γ‐tocopherol and its antioxidant activity

Li, Yaping; Zhang, Linshang; Wang, Zhide; Bi, Yanlan; Peng, Dan

doi:10.1002/aocs.12579

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…However, the removal efficiency of silica gel for α‐tocopherol was not satisfactory, which may be related to the differences in the chromatographic properties of the tocopherol homologues in the silica gel column. α‐Tocopherol contains three methyl groups on the chromanol ring, whereas two methyl groups and one methyl group are present for γ‐tocopherol and δ‐tocopherol, respectively [39], resulting in a relatively high hydrophobicity of α‐tocopherol and a weak interaction with the polar surface of silica gel.…”

Section: Resultsmentioning

confidence: 99%

Removal of Minor Components From Vegetable Oils by a Multistage Chromatography Column in a Specific Order

Shen,

Lian,

You

et al. 2024

Separation Science Plus

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The purpose of this study was to investigate the effects of different chromatographic column absorbents (activated clay, silica gel, and activated aluminum oxide) on the adsorption and removal of minor components (sterols, tocopherols, β‐carotene, free fatty acids (FFAs), secondary oxidation products, and peroxides) in vegetable oils. For single absorbents, activated aluminum oxide was the most effective material for removing tocopherols and FFAs from oil. All the adsorbents used have the capacity to remove β‐carotene from edible oils, and activated clay has the strongest ability, with removal rates reaching 99.8%. The brassicasterol, campesterol, β‐sitosterol, γ‐tocopherol, and δ‐tocopherol in vegetable oil can be completely removed by silica gel. Using a combination of these absorbents, a multistage optimized method was developed to maximize the removal of various minor components from vegetable oils. After multistage purification, free sterols, tocopherols, FFAs, β‐carotene, and secondary oxidation products were completely removed, whereas peroxides were also removed at concentrations less than 0.71 mmol/kg. The purified oils could be used as standard samples for in‐depth study of the effects of minor components on formation of association colloids and their influence on oil oxidation, as well as for evaluating the antioxidant potential of novel antioxidants or extracts.

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Section: Resultsmentioning

confidence: 99%

Removal of Minor Components From Vegetable Oils by a Multistage Chromatography Column in a Specific Order

Shen,

Lian,

You

et al. 2024

Separation Science Plus

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“…Vitamin E (tocopherol), as a good natural antioxidant, plays an important role in the nutritional composition of maize and the nutritional evaluation of fatty acids [ 74 ]. The results showed that when the content was less than 100 mg/100 g [ 75 ], the antioxidant activity of γ-tocopherol in vitro was better than that of α-tocopherol and δ-tocopherol [ 76 ]. In addition, γ-tocopherol has been proven to inhibit and promote cancer or increase the expression of tumour suppressor genes by interfering with the signaling pathway of cell cancer [ 77 ].…”

Section: Resultsmentioning

confidence: 99%

Fatty Acid Profiles and Nutritional Evaluation of Fresh Sweet-Waxy Corn from Three Regions of China

Hong

et al. 2022

Foods

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Fresh corn is a kind of herbaceous plant with rich nutritive value and a reasonable composition of fatty acids; however, there is little research on methods for the systemic nutritional evaluation of fatty acids in fresh corn. The aim of the present study was to conduct a comparative analysis of the fatty acid profiles of Chinese Huangnuo 9 sweet-waxy corn from the provinces of Inner Mongolia, Jilin, and Heilongjiang by gas chromatography; to establish a nutritional evaluation system according to the impacts of nutrients from fatty acids on human health; and finally, to evaluate, compare and rank fresh sweet-waxy corn grown in different regions. Tocopherols were detected by liquid chromatography in order to demonstrate the anti-oxidation activity of fresh corn’s fatty acids. The fatty acid contents and compositions of the 12 samples from the three regions are significantly different from each other. The nutrient value of the fatty acids in fresh corn was analyzed by factor analysis and a linear structural relation model, followed by the fitting and appraising of the model. The studied fresh sweet-waxy corn 1-4 from Inner Mongolia had the highest γ-tocopherol content and the closest saturated fatty acid:monounsaturated fatty acid:polyunsaturated fatty acid rate to the recommended value. The fatty acid profiles of sweet-waxy corns 2-1, 2-2, and 2-3 were the most diverse, and the comprehensive evaluation result of fresh corn 2-4 was the best; its total fatty acid content was the highest. Fresh corn 3-1 in Heilongjiang had the highest unsaturated fatty acids and lower values in its atherosclerosis index and thrombosis index, which suggested the strongest anti-atherosclerosis and anti-thrombotic ability. This work will give a reference to guide dietary choices and provide data support for dietary recommendations for residents.

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Secondary Metabolites of Fomitopsis betulina: Chemical Structures, Biological Activity and Application Prospects

Li,

Duan

et al. 2024

JoF

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Fomitopsis betulina, as a macrofungus with both medicinal and dietary applications, is renowned for its rich content of bioactive substances. The recent advancements in research have significantly enhanced our understanding of its polysaccharides, cellulose-degrading enzymes, and wide range of secondary metabolites. This paper provides a comprehensive review of the artificial cultivation techniques and the chemical profiling of over 100 secondary metabolites identified in F. betulina, including terpenoids, phenols, and various other classes. These compounds exhibit notable pharmacological activities, such as anti-cancer, anti-inflammatory, antimicrobial, antiviral, and anti-malarial effects. Moreover, this review delves into the genomic analysis of F. betulina, focusing on the prediction and classification of terpene synthases, which play a crucial role in the biosynthesis of these bioactive compounds. This insight is instrumental for potentially facilitating future biochemical studies and pharmaceutical applications. Through this review, we aim to solidify the foundation for future in-depth studies and the development of new drugs derived from this promising natural resource.

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High efficiency preparation of standard grade γ‐tocopherol and its antioxidant activity

Cited by 3 publications

References 19 publications

Removal of Minor Components From Vegetable Oils by a Multistage Chromatography Column in a Specific Order

Removal of Minor Components From Vegetable Oils by a Multistage Chromatography Column in a Specific Order

Fatty Acid Profiles and Nutritional Evaluation of Fresh Sweet-Waxy Corn from Three Regions of China

Secondary Metabolites of Fomitopsis betulina: Chemical Structures, Biological Activity and Application Prospects

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