Antioxidative and prooxidative effects in food lipids and synergism with α-tocopherol of açaí seed extracts and grape rachis extracts

Melo, Priscilla Siqueira; Arrivetti, Leandro de Oliveira Rodrigues; Alencar, Severino Matias de; Skibsted, Leif H.

doi:10.1016/j.foodchem.2016.06.101

Cited by 63 publications

(43 citation statements)

References 36 publications

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“…AIS can be presumably counted as lignin; however, because açaí seeds are quite different from typical lignocellulosic biomass, further analyses of this AIS are required to confirm if all of its content corresponds to the lignin. The high percentage of extractives in açaí seeds is in accordance with its reported polyphenolic polymeric procyanidins content (Melo et al, 2016). Nevertheless, it is possible that not all the content of the polymeric procyanidins is accounted for in the extractives because hydrogen bonds can be formed between the hydroxyl groups of polyphenols and oxygen of the glycosidic linkages of polysaccharides, making procyanidins imprisoned in the cell wall of carbohydrates and not extractable using organic solvents (Jakobek, 2015).…”

Section: Resultssupporting

confidence: 79%

High concentration and yield production of mannose from açaí (Euterpe oleracea) seeds via diluted-acid and mannanase-catalyzed hydrolysis

Jpr

et al. 2019

Preprint

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The açaí berry’s seed corresponds to 85–95% of the fruit’s weight and represents ~1.1 million tons of residue yearly accumulated in the Amazon region. This study confirmed that mannan is the major component of mature seeds, corresponding to 80% of the seed’s total carbohydrates and about 50% of its dry weight. To convert this high mannan content into mannose, a sequential process of diluted acid and enzymatic hydrolysis was evaluated. Diluted-H2SO4 hydrolysis (3%-acid, 60-min, 121°C) resulted in a 30% mannan hydrolysis yield and 41.7 g/L of mannose. Because ~70% mannan remained in the seed, a mannanase-catalyzed hydrolysis was sequentially performed with 2–20% seed concentration, reaching 146.3 g/L of mannose and a 96.8% yield with 20% solids. As far as we know, this is the highest reported concentration of mannose produced from a residue. Thus, this work provides fundamental data for achieving high concentrations and yields of mannose from açaí seeds.HighlightsMannan was confirmed as the major component (~50%) of açaí seeds.Diluted-H2SO4 hydrolysis had a limited effect on mannan conversion into mannose.Enzymatic hydrolysis was sequentially performed with a high seed concentration.Mannan was efficiently hydrolyzed by mannanases, producing a 96.8% yield.Mannose production of 146.3 g/L was obtained with mannanase-catalyzed hydrolysis.Graphical abstract

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Section: Resultssupporting

confidence: 79%

High concentration and yield production of mannose from açaí (Euterpe oleracea) seeds via diluted-acid and mannanase-catalyzed hydrolysis

Jpr

et al. 2019

Preprint

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“…The present contribution detected a lack of data on tocotrienols in novel dietary sources of tocols; therefore, further research is necessary to fill this apparent gap in the existing literature. Tocopherols may act as antioxidants in a synergistic manner with other polyphenols [74] and phospholipids [75]. Khan and Shahidi [75] evaluated the antioxidant effectiveness of individual phospholipids.…”

Section: Current and Potential Applications Of Tocopherols And Tocmentioning

confidence: 99%

“…Djenane and co-workers [95] reported that alpha-tocopherol improved the inhibition capacity of vitamin C against the formation of metmyoglobin of beef steaks packaged in modified atmosphere during storage. Furthermore, a recent study [74] demonstrated that alpha-tocopherol may have a synergistic effect in combination with phenolic extracts from açaí and grape by-products in protecting methyl linoleate against metmyoglobin-initiated oxidation.…”

Section: Current and Potential Applications Of Tocopherols And Tocmentioning

confidence: 99%

Tocopherols and Tocotrienols in Common and Emerging Dietary Sources: Occurrence, Applications, and Health Benefits

Shahidi

Camargo

2016

IJMS

318

182

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Edible oils are the major natural dietary sources of tocopherols and tocotrienols, collectively known as tocols. Plant foods with low lipid content usually have negligible quantities of tocols. However, seeds and other plant food processing by-products may serve as alternative sources of edible oils with considerable contents of tocopherols and tocotrienols. Tocopherols are among the most important lipid-soluble antioxidants in food as well as in human and animal tissues. Tocopherols are found in lipid-rich regions of cells (e.g., mitochondrial membranes), fat depots, and lipoproteins such as low-density lipoprotein cholesterol. Their health benefits may also be explained by regulation of gene expression, signal transduction, and modulation of cell functions. Potential health benefits of tocols include prevention of certain types of cancer, heart disease, and other chronic ailments. Although deficiencies of tocopherol are uncommon, a continuous intake from common and novel dietary sources of tocopherols and tocotrienols is advantageous. Thus, this contribution will focus on the relevant literature on common and emerging edible oils as a source of tocols. Potential application and health effects as well as the impact of new cultivars as sources of edible oils and their processing discards are presented. Future trends and drawbacks are also briefly covered.

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“…Because of consumer health concerns, current research has focused on natural active compounds rather than synthetic compounds. These natural compounds include those in green-tea extract (Siripatrawan & Harte, 2010), quercetin (Souza et al, 2015), grapeseed extract (Moradi et al, 2012), atocopherol (Melo, Arrivetti, Alencar, & Skibsted, 2016), pomegranate-rind extract (Qin et al, 2015), curcumin (Etxabide, Coma, Guerrero, Gardrat, & de la Caba, 2017) and essential oils (Moradi, Tajik, Rohani, & Mahmoudian, 2016). Among these natural active compounds, curcumin, which is a polyphenolic compound that is isolated from turmeric powder, has been used extensively in medicine because of its desirable antioxidant, antitumor and antiinflammatory activities (Sonkaew, Sane, & Suppakul, 2012).…”

Section: Introductionmentioning

confidence: 99%

Investigation of antioxidant activity and release kinetics of curcumin from tara gum/ polyvinyl alcohol active film

2017

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Antioxidative and prooxidative effects in food lipids and synergism with α-tocopherol of açaí seed extracts and grape rachis extracts

Cited by 63 publications

References 36 publications

High concentration and yield production of mannose from açaí (Euterpe oleracea) seeds via diluted-acid and mannanase-catalyzed hydrolysis

High concentration and yield production of mannose from açaí (Euterpe oleracea) seeds via diluted-acid and mannanase-catalyzed hydrolysis

Tocopherols and Tocotrienols in Common and Emerging Dietary Sources: Occurrence, Applications, and Health Benefits

Investigation of antioxidant activity and release kinetics of curcumin from tara gum/ polyvinyl alcohol active film

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