Antioxidative and Bactericidal Properties of Phenolic Compounds in Rapeseeds

Nowak, H.; Kujawa, Krzysztof; Zadernowski, R.; Roczniak, B.; Kozłowska, Hanna

doi:10.1002/lipi.19920940406

Cited by 63 publications

(56 citation statements)

References 7 publications

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“…Among oilseeds, rapeseeds contain the highest amount of phenolic compounds [8]. The largest fraction of polyphenolic compounds, accounting for about 80% of the total amount, corresponds to esterified phenolic acids, where sinapine, the choline-ester of sinapic acid, is by large the most representative one.…”

Section: Introductionmentioning

confidence: 99%

High‐temperature pre‐conditioning of rapeseed: A polyphenol‐enriched oil and the effect of refining

Zacchi

Eggers

2008

Euro J Lipid Sci & Tech

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In this work, a pretreatment process for rapeseeds, which involves the use of high-temperature steam, is presented. This method, besides accomplishing the beneficial effects of the conventional industrial thermal treatment, leads to an enrichment of some important minor compounds (polyphenols and phosphatides) in the resulting oil. Rapeseeds were pretreated at different operative conditions. Then, the seeds were pressed and the press-cake was solvent extracted. The obtained oils were then refined by both chemical and physical refining techniques, and the influence of each refining step on the content of minor compounds was evaluated. The results show that the amounts of polyphenols and phospholipids present in the oil coming from pretreated seeds increase and that their concentrations depend on the conditioning time. The polyphenols present in the oil correspond mostly to 2,6-dimethoxy-4-vinylphenol (vinylsyringol). The content of polyphenols was only slightly reduced during degumming. Neutralization resulted in a complete removal of these minor compounds. For the physical refining process, the type and amount of bleaching clay used had a significant influence on the content of polyphenols. After deodorization, oil samples with a considerable amount of polyphenols were obtained. These samples show a higher oxidative stability than chemically refined oils.

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Section: Introductionmentioning

confidence: 99%

High‐temperature pre‐conditioning of rapeseed: A polyphenol‐enriched oil and the effect of refining

Zacchi

Eggers

2008

Euro J Lipid Sci & Tech

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“…They are plant secondary metabolites, and they play an important role as defense compounds. Rapeseed contains more phenolic compounds than any other oilseed plant (Nowak et al, 1992). The most significant of these are sinapic acid and its derivatives, most notabley sinapine (Kozlowska et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Variations in fatty acid composition, glucosinolate profile and some phytochemical contents in selected oil seed rape (<i>Brassica napus</i> L.) cultivars

El-Beltagi¹,

Mohamed²

2010

Grasas y Aceites

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Rapeseed (Brassica napus L.) is now the third most important source of edible oil in the world after soybean and palm oil. In this study seeds of five different rapeseed cultivars namely; pactol, silvo, topas, serw 4 and serw 6 were evaluated for their fatty acid composition, glucosinolate profile, amino acids, total tocopherols and phenolic content. Among all cultivars significant variability in fatty acids were observed. The oleic acid (C18:1) ranged from 56.31% to 58.67%, linoleic acid (C18:2) from 10.52% to 13.74%, α-linolenic acid (C18:3) from 8.83% to 10.32% and erucic acid (22:1) from 0.15% to 0.91%. The glucosinolate profile of rapeseed was also separated and identified using high-performance liquid chromatography. Small variations in the glucosinolate profile were observed among all tested cultivars; however, progoitrin and gluconapin were the major glucosinolate found. Additionally, silvo cultivar showed the highest total glucosinolate c ontents (5.97 μmol/g dw). Generally, the contents of aspartic, glutamic, arginine and leucine were high, while the contents of tyrosine and isoleucine were low among all cultivars. For total tocopherols, the results indicated that both serw 6 and pactol cultivars had the highest total tocopherol contents (138.3 and 102.8 mg/100 g oil, respectively). Total phenolic contents varied from 28.0 to 35.4 mg/g dw. The highest total phenolic content was found in topas while the lowest value was detected in serw 6. These parameters; fatty acid contents, glucosinolate profile and amino acids together with total tocopherols and phenolic contents, could be taken into consideration by oilseed rape breeders as selection criteria for developing genotypes with modified seed quality traits in Brassica napus L.

La colza (Brassica napus L.) es hoy en día el tercer cultivo más importante de aceites comestibles en el mundo tras el aceite de soja y de palma. En este estudio semillas de cinco cultivos diferentes de colza, denominadas pactol, silvo, topas, serw 4 y serw 6, fueron evaluadas mediante su composición en ácidos grasos, perfil de glucosinolato, aminoácidos, tocoferoles totales y contenido fenólico. En todos los cultivos, una significativa variabilidad en los ácidos grasos fue observada. El ácido oleico (C18:1) vario desde un 56.31% a un 58.67%, ácido linoleico (C18:2) desde un 10.52% a un 13.74%, ácido α-linolenic (C18:3) desde 8.83% a un 10.32% y ácido erúcico (22:1) desde un 0.15% a un 0.91%. El perfil de glucosinolatos de colza fue también separado e identificado usando cromatografía líquida de alta eficacia. Una baja variación en el perfil de glucosinolato fue observado en todos los cultivos ensayados; sin embargo, progoitrina y gluconapina fueron los principales glucosinolatos encontraos en todos los cultivos. Además, el cultivo silvo mostro el contenido de glucosinolatos totales más alto (5.97 μmol/g dw). Generalmente, el contenido de aspártico, glutámico, arginina y leucina fue alto, mientras que el contenido de tirosina y isoleucina fue bajo en tod...

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“…The most prolific phenolic compound responsible for the antioxidant activity in the crude canola oil was identified as vinylsyringol (canolol), which is formed via sinapic acid decarboxylation during pressing of the oil at high temperature and pressure [8,9]. Owing to their high phenolic content canola extracts were reported to have powerful antioxidative properties stronger than many synthetic antioxidants [10,11]. Oilseeds are usually extracted with organic solvents intended to remove the neutral lipids.…”

Section: Introductionmentioning

confidence: 99%

Quality of Canola Oil Obtained by Conventional and Supercritical Fluid Extraction

Khattab¹,

Rempel²,

Suh³

et al. 2012

AJAC

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Quality of canola oil obtained by the supercritical fluid extraction (SFE), using CO 2 with ethanol as a co-solvent, was evaluated and compared to that of the conventionally-obtained oils using either n-hexane or chloroform methanol mixture. Physical characteristics, chemical properties, fatty acid composition and phenolic profile of oils were investigated. The SFE oil showed significantly lower melting point, peroxide value (PV) and higher free fatty acids (FFAs) and iodine value (IV) than the n-hexane-extracted one. There were no significant differences in the fatty acid composition of different oils. The SFE oil showed significantly higher phenolic content (35.91, 10.15, 3.16, 0.32 and 47.48 μg/g of sinapic acid, sinapine, sinapoyl glucose, canolol and total phenolics) as compared to 0.08, 0.70, 0.88, 0.45 and 0.71 μg/g, respectively in the n-hexane-extracted oil. These results indicate the superiority of SFE and advocate its use for the extraction of highly stable and functional canola oil for further health and nutraceutical uses. The present results have an industrial and technological relevance as SFE could be competitive with the traditional extraction techniques providing an environmental approach and enhancing the obtained oil quality and stability. After recovery of the initial installation costs, SFE could be more economic than conventional extraction. However, further economical studies are needed to validate this last conclusion.

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Antioxidative and Bactericidal Properties of Phenolic Compounds in Rapeseeds

Cited by 63 publications

References 7 publications

High‐temperature pre‐conditioning of rapeseed: A polyphenol‐enriched oil and the effect of refining

High‐temperature pre‐conditioning of rapeseed: A polyphenol‐enriched oil and the effect of refining

Variations in fatty acid composition, glucosinolate profile and some phytochemical contents in selected oil seed rape (<i>Brassica napus</i> L.) cultivars

Quality of Canola Oil Obtained by Conventional and Supercritical Fluid Extraction

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