Phenolic compounds in plant oils: A review of composition, analytical methods, and effect on oxidative stability

Mikołajczak, Natalia; Tańska, Małgorzata; Ogrodowska, Dorota

doi:10.1016/j.tifs.2021.04.046

Cited by 58 publications

(28 citation statements)

References 185 publications

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“…Nevertheless, it is not always possible to associate a higher amount of phenolic compounds with better oxidative properties, since different phenolic compounds have different effects on the oxidative stability of the oil. Therefore, further studies would provide a better understanding of the mechanism of their protective action on oils, particularly under natural storage [ 18 ].…”

Section: Resultsmentioning

confidence: 99%

Quality Changes of Cold-Pressed Black Cumin (Nigella sativa L.), Safflower (Carthamus tinctorius L.), and Milk Thistle (Silybum marianum L.) Seed Oils during Storage

Tarasevičienė

Laukagalis

Paulauskienė

et al. 2023

Plants

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Oils derived from non-traditional seeds, such as safflower, milk thistle, and black cumin seeds, have recently grown in popularity. Seed oil is in high demand due to consumer interest in illness prevention and health promotion through healthier diets that include a high concentration of monounsaturated and polyunsaturated fatty acids and antioxidant phenolic components. This study assessed the quality characteristics of cold-pressed seed oil at three unique storage times: at the beginning of the trial (i.e., before storage), after 2 months, and after 4 months. The results of the performed analyses indicate that the acidity of extracted black cumin, safflower, and milk thistle seed oil fluctuates considerably over time. The highest acidity level change was detected for black cumin seed oil, from 10.26% after the extraction to 16.96% after 4 months of storage at 4 °C. Consequently, changes between pre- and post-storage peroxide concentrations were discernible after four months. Peroxide value in milk thistle and safflower seed oils increased by 0.92 meq/kg and 2.00 meq/kg, respectively, during the assessed storage time, while that of black cumin was very high and fluctuated. The storage period substantially affects oxidative changes and the oxidation stability of the oil. Major changes were observed in the polyunsaturated fatty acids in seed oil during storage. The essential changes were detected in the black cumin seed oil odor profile after 4 storage months. Their quality and stability, as well as the nature of the changes that occur during the storage of oil, require extensive investigation.

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Section: Resultsmentioning

confidence: 99%

Quality Changes of Cold-Pressed Black Cumin (Nigella sativa L.), Safflower (Carthamus tinctorius L.), and Milk Thistle (Silybum marianum L.) Seed Oils during Storage

Tarasevičienė

Laukagalis

Paulauskienė

et al. 2023

Plants

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“…), lignans and stilbenes, show mainly antioxidant and antitumoral activities related to the reduced risk of cardiovascular disease due to the inhibition of LDL oxidation, an antihypertensive effect, anti-inflammatory effect and regulation of the immune response, platelet antiaggregant. Isoflavones found in soy, on the other hand, are associated with an antiestrogenic effect due to their interaction with 17-b-estradiol receptors [ 35 , 36 , 37 , 38 , 39 , 54 , 55 , 56 ].…”

Section: Sources Of Nutraceuticals With Biological Valuementioning

confidence: 99%

Nutraceuticals and Food-Grade Lipid Nanoparticles: From Natural Sources to a Circular Bioeconomy Approach

Blanco-Llamero

Fonseca

Durazzo³

et al. 2022

Foods

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Nutraceuticals have gained increasing attention over the last years due to their potential value as therapeutic compounds formulated from natural sources. For instance, there is a wide range of literature about the cardioprotective properties of omega-3 lipids and the antioxidant value of some phenolic compounds, which are related to antitumoral activity. However, the value of nutraceuticals can be limited by their instability under gastric pH and intestinal fluids, their low solubility and absorption. That is why encapsulation is a crucial step in nutraceutical design. In fact, pharmaceutical nanotechnology improves nutraceutical stability and bioavailability through the design and production of efficient nanoparticles (NPs). Lipid nanoparticles protect the bioactive compounds from light and external damage, including the gastric and intestinal conditions, providing a retarded delivery in the target area and guaranteeing the expected therapeutic effect of the nutraceutical. This review will focus on the key aspects of the encapsulation of bioactive compounds into lipid nanoparticles, exploring the pharmaceutical production methods available for the synthesis of NPs containing nutraceuticals. Moreover, the most common nutraceuticals will be discussed, considering the bioactive compounds, their natural source and the described biological properties.

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“…This method determines the total phenolic compound in plant crude extract where the Folin-Ciocalteu reagent (2.5 g Na2MoO4.2H2O, 10 g Na2WO4.2H2O in 70 mL distilled H2O, then 5 mL 85% H3PO4 and 10 mL HCl), a mixture of phosphomolybdate and phosphotungstate reagents (H3PMo12O40 and H3PW12O40) and aluminum chloride (AlCl3), in the presence of phenolics and carried out in alkaline medium Na2CO3 to produce a blue color molybdenum tungsten (Mo8O23 and W8O23) that can be measured in the range of 720-765 nm in visible spectrophotometer against the standard gallic acid. Also, some other standards including quercetin, ferulic acid and caffeic acids have been reported [57,74,121]. In this method different ratio of diluted crude extract and Folin-Ciocalteu reagent have been used.…”

Section: Techniques For Identify and Quantifying Secondary Metabolitesmentioning

confidence: 99%

Identification and Pharmacological Activities of Secondary Metabolites of Phytochemicals

Ovonramwen¹

2022

Preprint

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Plant secondary metabolites are organic compounds (alkaloids, flavonoids, phenolics, tannins, anthraquinones, saponins, steroids, lignins, terpenes) produced by plant for self-defense during growth and development in order to protect them from harmful agents. As population is increasing and quality of life is reducing couple with outbreak of some diseases that are posing threat on the economy, a lot of medicinal plants have attracted interest of researchers because of the usefulness of these metabolites in pharmaceuticals, food and cosmetic industries. In this review, the pharmacological activities of some medicinal plants that are rich in secondary metabolites were studied, means of identifying and quantifying using spectrophotometry and chromatography techniques were also discussed. However, this will assist to reduce the uses and dependent on the synthetic drug and the onset of the age related diseases.

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Phenolic compounds in plant oils: A review of composition, analytical methods, and effect on oxidative stability

Cited by 58 publications

References 185 publications

Quality Changes of Cold-Pressed Black Cumin (Nigella sativa L.), Safflower (Carthamus tinctorius L.), and Milk Thistle (Silybum marianum L.) Seed Oils during Storage

Quality Changes of Cold-Pressed Black Cumin (Nigella sativa L.), Safflower (Carthamus tinctorius L.), and Milk Thistle (Silybum marianum L.) Seed Oils during Storage

Nutraceuticals and Food-Grade Lipid Nanoparticles: From Natural Sources to a Circular Bioeconomy Approach

Identification and Pharmacological Activities of Secondary Metabolites of Phytochemicals

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