Ten cold-pressed oil from 6 herb plant seeds (sesame, fax, saffower, pumpkin, tomato and hemp) and 4 woody plant seeds (camellia, almond, walnut and peony) were analyzed to determine bioactive compounds content, i...Ten cold-pressed oil from 6 herb plant seeds (sesame, fax, saffower, pumpkin, tomato and hemp) and 4 woody plant seeds (camellia, almond, walnut and peony) were analyzed to determine bioactive compounds content, including tocopherols, phytosterols and phenolics, as well as their antioxidant activities. Total tocopherols content ranged from 161.11 mg/kg in camellia seed oil to 1,072.51 mg/kg in tomato seed oil. Tomato seed oil had the highest total phytosterols (708.89 mg/100 g) and phenolics content (20.27 mg SAE/100 g),whereas, saffower seed oil has the lowest total phytosterols (173.75 mg/100g) and walnut kernel oil contained the lowest phenolics (2.32 mg SAE/100 g), respectively. Tomato seed oil exhibited the strongest ferric-reducing antioxidant power (FARP, 311.36 μmol/100 g) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity (56.40 μmol/100 g), while camellia seed oil had the lowest FRAP value (34.83 μmol/100 g) and fax seed oil had the lowest DPPH value (2.75 μmol/100 g). Correlation coeffcient was determined as 0.647 and 0.863 between FRAP value and total tocopherols and phenolics, and 0.673 and 0.711 between DPPH value and total tocopherols and phenolics (p 〈 0.05), respectively. This result indicated the antioxidant activities (FRAP and DPPH) were highly correlated with total tocopherols and phenolics content of oil. This study will be very useful for comprehensive utilization of all 10 cold-press oils.展开更多
Camellia seed oil (CSO) is rich in oleic acid and has a high number of active components, which give the oil high nutritional value and a variety of biological activity. The aim of the present study was to determine...Camellia seed oil (CSO) is rich in oleic acid and has a high number of active components, which give the oil high nutritional value and a variety of biological activity. The aim of the present study was to determine the changes in the content and distribution of total polar compounds (TPC) in CSO during heating. TPC were isolated by means of preparative flash chromatography and further analyzed by high-performance size-exclusion chromatography (HPSEC) The TPC content of CSO increased from 4.74% to 25.29%, showing a significantly lower formation rate as compared to that of extra virgin olive oil (EVOO) and soybean oil (SBO) during heating. Furthermore, heating also resulted in significant differences (P〈0.05) in the distribution of TPC among these oils. Though the content of oxidized triacyl- glycerol dimers, oxidized triacylglycerol oligomers, and oxidized triacylglycerol monomers significantly increased in all these oils, their increased percentages were much less in CSO than those in EVOO, indicating that CSO has a greater ability to resist oxidation. This work may be useful for the food oil industry and consumers in helping to choose the correct oil and to decide on the useful lifetime of the oil.展开更多
基金National Key R&D Program of China(2017YFD0400402)National Natural Science Foundation of China(31471620)National Science Foundation of China(31772010)for financial support
文摘Ten cold-pressed oil from 6 herb plant seeds (sesame, fax, saffower, pumpkin, tomato and hemp) and 4 woody plant seeds (camellia, almond, walnut and peony) were analyzed to determine bioactive compounds content, including tocopherols, phytosterols and phenolics, as well as their antioxidant activities. Total tocopherols content ranged from 161.11 mg/kg in camellia seed oil to 1,072.51 mg/kg in tomato seed oil. Tomato seed oil had the highest total phytosterols (708.89 mg/100 g) and phenolics content (20.27 mg SAE/100 g),whereas, saffower seed oil has the lowest total phytosterols (173.75 mg/100g) and walnut kernel oil contained the lowest phenolics (2.32 mg SAE/100 g), respectively. Tomato seed oil exhibited the strongest ferric-reducing antioxidant power (FARP, 311.36 μmol/100 g) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity (56.40 μmol/100 g), while camellia seed oil had the lowest FRAP value (34.83 μmol/100 g) and fax seed oil had the lowest DPPH value (2.75 μmol/100 g). Correlation coeffcient was determined as 0.647 and 0.863 between FRAP value and total tocopherols and phenolics, and 0.673 and 0.711 between DPPH value and total tocopherols and phenolics (p 〈 0.05), respectively. This result indicated the antioxidant activities (FRAP and DPPH) were highly correlated with total tocopherols and phenolics content of oil. This study will be very useful for comprehensive utilization of all 10 cold-press oils.
基金Project supported by the National Natural Science Foundation of China(No.31430067)the Northeast Agricultural University Innovation Foundation for Postgraduate of Heilongjiang Province(No.yjscx14058)the National High-Tech R&D Program(863)of China(No.2013AA102104)
文摘Camellia seed oil (CSO) is rich in oleic acid and has a high number of active components, which give the oil high nutritional value and a variety of biological activity. The aim of the present study was to determine the changes in the content and distribution of total polar compounds (TPC) in CSO during heating. TPC were isolated by means of preparative flash chromatography and further analyzed by high-performance size-exclusion chromatography (HPSEC) The TPC content of CSO increased from 4.74% to 25.29%, showing a significantly lower formation rate as compared to that of extra virgin olive oil (EVOO) and soybean oil (SBO) during heating. Furthermore, heating also resulted in significant differences (P〈0.05) in the distribution of TPC among these oils. Though the content of oxidized triacyl- glycerol dimers, oxidized triacylglycerol oligomers, and oxidized triacylglycerol monomers significantly increased in all these oils, their increased percentages were much less in CSO than those in EVOO, indicating that CSO has a greater ability to resist oxidation. This work may be useful for the food oil industry and consumers in helping to choose the correct oil and to decide on the useful lifetime of the oil.