Phenolic profile and antioxidant activity of the Algerian ripe date palm fruit (Phoenix dactylifera)

Mansouri, Ali; Embarek, Guendez; Kokkalou, Eugene; Kefalas, Panagiotis

doi:10.1016/j.foodchem.2004.02.051

Cited by 487 publications

(412 citation statements)

References 17 publications

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“…The DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity of the chard extract was measured according to the procedure described by Mansouri et al [17]. Appropriate dilution series of extract (0-2 mg/ml) were prepared in methanol 25 μl of each dilution was added to 975 μl of a 6x10-5M methanolic solution of DPPH followed by vortexing.…”

Section: Determination Of Total Polyphenols Contentmentioning

confidence: 99%

Chard (Beta Vulgaris Var. Cicla) Extract Modulates Zinc Status, Glucose Level and Antioxydant Values in Diabetic Rats Fed Zinc Deficiency Diet

Hamdiken

Kechrid

2017

Int J Pharm Pharm Sci

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Objective: Oxidative stress which comes from hyperglycemia, it accelerates the development of cellular and vascular damage complications in diabetes, but the antioxidants may play a beneficial role in its prevention. Several plants extracts have an antioxidant activity and the ability to reduce oxidative stress in diabetes. Thus this study was conducted to investigate the effect of Beta vulgaris var cicla extract on zinc status, glucose concentration and antioxidant parameters in streptozotocin-diabetic rats fed zinc deficiency diet.Methods: Twenty-eight male albino (Wistar) rats were divided into four groups:Results: Body weight gain of zinc-deficient diabetic animals was lower than that of zinc-adequate diabetic animals. It was noticed also that inadequate dietary zinc intake increased glucose and MDA levels. In addition, zinc deficiency diet led to a decrease in zinc tissues, GSH concentration both GST and GSH-Px activities. However, Oral administration of Beta vulgaris extract significantly decreased both serum glucose and MDA (p<0.001) levels, with a significant increase in body weight gain (p<0.001), GSH concentration (p<0.05, P<0.001), GST (p<0.05, p<0.001) and GSHPx (p<0.001) activities.two groups fed a zinc-sufficient diet one non-diabetic and the other diabetic, while the others two diabetic groups were fed a zinc-deficient diet, one non-treated group and the other treated with the extract of Beta vulgaris var cicla. After 21 d of dietary manipulation, fasting animals were scarified. Blood glucose, tissues zinc (femur, liver, kidney), malondialdehyde (MDA), reduced glutathione (GSH), glutathione peroxidase (GSH-Px) and glutathione-S-transferase (GST) were evaluated. Conclusion:The present study showed that Beta vulgaris var cicla supplementation presumably acting as an antioxidant, and it can be a natural Keywords: Diabetes, Rat, Zinc deficiency, Beta vulgaris var cicla, Antioxidant source for the reduction of diabetes development caused by zinc deficiency.

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Section: Determination Of Total Polyphenols Contentmentioning

confidence: 99%

Chard (Beta Vulgaris Var. Cicla) Extract Modulates Zinc Status, Glucose Level and Antioxydant Values in Diabetic Rats Fed Zinc Deficiency Diet

Hamdiken

Kechrid

2017

Int J Pharm Pharm Sci

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“…Dates possess important radical scavenging activity due to the presence of non-enzymatic antioxidants (phenolic, flavonoid and ascorbic acid) and enzymatic antioxidants (catalase, peroxidase and superoxide dismutase), compounds (Biglari et al, 2008;Awad et al, 2011a) known to have health benefits (Vayalil, 2011). Antioxidants are the complex moieties which can quench and neutralize the free radicals and can prevent oxidation of additional molecules and promote health benefits (Mansouri et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, some related studies have also been reported on date fruits from Saudi Arabia and the USA (Al-Turki et al, 2010), Oman (Al-Farsi et al, 2005;2007a), Algeria (Mansouri et al, 2005), Iran (Biglari et al, 2008) and Bahrain (Allaith, 2008). However, limited studies have been done on antioxidant activity, total phenolic contents and sugar profiling of date fruits during their development.…”

Section: Introductionmentioning

confidence: 99%

Biochemical attributes of dates at three maturation stages

Haider¹,

Khan²,

Jaskani³

et al. 2014

Emir. J. Food Agric

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The date fruit is a primary component of the human diet in many countries with arid and semiarid climates. The present study reflects the relationship of different biochemical attributes with progressive date fruit developmental stages. The study involved eight date palm (Phoenix dactylifera L.) cultivars from Pakistan examined at three different edible stages of dates (khalal, rutab and tamar). The antiradical efficiency (2.14-0.36), antioxidant enzymes (catalase and peroxidase), total phenolic contents (468.99-108 mg GAE/100g, FW) and the soluble protein contents (5.73-2.75 g/100g) were higher in higher at khalal and thereafter, but declined at fully ripened (tamar) stage. Moreover, glucose (16.92-31.66%) and fructose (15.25-30.58%) have lower quantity at khalal and higher quantity at tamar stage, whereas non-reducing (sucrose) sugars were present only at khalal and rutab stage fruits. Makran and Chohara cultivars revealed best overall values in examined compounds. Our results revealed that variation in different biochemical attributes is mainly depended on the difference in fruit maturity stage and cultivar. Cultivars exhibiting high values of beneficial biochemical attributes may be considered for the expansion of date palm cultivation.

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“…Dates are known to be heart-healthy [12], and their soluble fiber helps against constipation [13]. Antioxidant properties of date fruit vary depending on the amount of phenolics, vitamins C and E, carotenoids, and flavonoids [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Low Temperature Refrigeration as an Alternative Anti-Pest Treatment of Dates

Lallouche

Kolodyaznaya

Boulkrane

et al. 2017

Environmental and Climate Technologies

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-Large amounts of dates are produced and consumed around the world each year. Apomyelois ceratoniae causes main losses during storage and export of date fruit. Fumigation is the most widely used treatment to prevent postharvest losses. However, this treatment negatively affects the biological value of dates, environmental and economic parameters of production. Widespread fumigation agent methyl bromide is toxic to a human body and contributes to the destruction of the ozone layer. The aim of the current work was to find a new method based on the use of low temperature refrigeration to reduce the pest and insect infestation preserving the nutritive value of dates during cold storage at the same time. A. ceratoniae mortality under different temperatures and dates respiration rate, sugar, organic acids, pectic substances content and sensorial characteristics were studied. The results indicate that at −18 °С the A. ceratonie larva dies within 2 h, the eggs and larvaewithin 24 h respectively. Thus, it is clearly shown that there is no need in using chemicals or irradiation to prevent dates pests. Physicochemical and organoleptic proprieties of dates were satisfactory during 360 d at −18 °С and during 180 d at +4 °С. The low temperature refrigeration and storage at −18 °С is recommended for dates to prevent pests and quality losses. It is apparently advantageous for environment and climate if compared with other anti-pest treatment variants.

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Phenolic profile and antioxidant activity of the Algerian ripe date palm fruit (Phoenix dactylifera)

Cited by 487 publications

References 17 publications

Chard (Beta Vulgaris Var. Cicla) Extract Modulates Zinc Status, Glucose Level and Antioxydant Values in Diabetic Rats Fed Zinc Deficiency Diet

Chard (Beta Vulgaris Var. Cicla) Extract Modulates Zinc Status, Glucose Level and Antioxydant Values in Diabetic Rats Fed Zinc Deficiency Diet

Biochemical attributes of dates at three maturation stages

Low Temperature Refrigeration as an Alternative Anti-Pest Treatment of Dates

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