Phenols, flavonoids and antioxidant activity of aqueous and methanolic extracts of propolis (Apis mellifera L.) from Algarve, South Portugal

Miguel, Maria Graça; Nunes, Susana; Dandlen, Susana; Cavaco, Ana M.; Antunes, Maria Dulce

doi:10.1590/s0101-20612014000100002

Cited by 96 publications

(86 citation statements)

References 39 publications

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“…37 Our metal chelating activity results were different from the previous reports. This situation may arise from harvested region, type of solvents, and extraction methods.…”

contrasting

confidence: 99%

Antioxidant Properties and Protective Effect of Turkish Propolis on t-BHP-Induced Oxidative Stress in Foreskin Fibroblast Cells

Mısır¹,

Aliyazıcıoğlu²,

Demir³

et al. 2018

IJPER

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Objective: Propolis is an important bee product, rich in polyphenolic compounds. It has antitumoral, antioxidant, antimutagenic, and other useful activities. Biological activities of propolis are generally attributed to its substance of polyphenolic compounds. The aim of this study was to investigate the in vitro antioxidant properties and reduction amount of intracellular reactive oxygen species (ROS) in human normal foreskin fibroblast cells by Turkish propolis ethanolic extract (EEP). Method: Total phenolic and flavonoid contents, reducing power, radical scavenging capacity, and iron chelating activity of EEP were determined using spectrophotometric methods. Intracellular ROS levels were determined by spectrofluorometric analysis with CM-H 2 DCFDA. Results: Our results indicated that antioxidant activity was correlated with the higher total phenolic and flavonoid contents of EEP. The generated ROS levels were significantly decreased by EEP compared to only t-BHP group. Conclusion: Ethanolic propolis extract may be evaluated as a potency antioxidant resource and/or a novel natural agent in food and drug industries.

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“…37 Our metal chelating activity results were different from the previous reports. This situation may arise from harvested region, type of solvents, and extraction methods.…”

contrasting

confidence: 99%

Antioxidant Properties and Protective Effect of Turkish Propolis on t-BHP-Induced Oxidative Stress in Foreskin Fibroblast Cells

Mısır¹,

Aliyazıcıoğlu²,

Demir³

et al. 2018

IJPER

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“…The evaluation of flavone and flavonol content was carried out as previously described (Miguel, Nunes, Dandlen, Cavaco, & Antunes, 2014). Briefly, a volume of 500 μl of honey dilution was mixed with the 500 μl of AlCl 3 (5%) and incubated for 1 hr at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Physicochemical characterization and antioxidant activity of Palestinian honey samples

Imtara

Elamine

Lyoussi

2018

Food Science & Nutrition

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Physicochemical characteristics, main minerals, and antioxidant activity were determined for Palestinian honey samples belonging to different floral and geographical origins. The features of the analyzed samples were within the established international standards for honey quality control. One clear exception was the hydroxymethylfurfural (HMF) of the Ziziphus sample purchased from the Jericho region, which is the lowest city in the word characterized by a hot desert climate. The observed HMF value was 81.86 ± 2.64 mg/kg being two folds the maximum allowed in honey samples (40 mg/kg). As a second objective of the present work, the parameters were divided into two groups with different discriminatory power. The assessed physicochemical parameters, and the antioxidant activities, specific to the botanical origin discrimination, were used to run the first PCA. A strong correlation could be seen between the bioactive compounds and the antioxidant activities despite the geographical origin of the samples. Thyme and Ziziphus samples were the best samples, while citrus sample presented the lowest activity. Regarding the geographical discrimination, Ash and mineral contents in addition to the electrical conductivity were used. The output PCA conserved high represent ability of the data in the two‐first components being 82.72% and 9.60%. A little discrimination between the samples produced in the north and those produced in the south of the country, but it was not perfect. The intervention of the botanical variability could be the reason.

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“…The Total phenolic acids content among flaxseed hull oils were significantly different with the greatest concentration for the crop cultivated in 2008 (94 mg/ 100 g oil), followed by the crop cultivated in 2006 (91 mg/ 100 g oil) and the crop cultivated in 2005 (90 mg/ 100 g oil). Although the interest in phenolics is related primarily to their antioxidant activity, they also show important biological activity in vivo and may be beneficial in combating diseases related to excessive oxygen radical formation exceeding the antioxidant defense capacity of the human body (Miguel et al, 2014). Flavanoids fall within a close range, from 11 to 19 mg/ 100 g oil.…”

Section: Effect Of Harvest Year On Bioactive Compounds and Antioxidanmentioning

confidence: 99%

Influence of harvest year in the physicochemical properties and antioxidant activity of flaxseed hull oils from Tunisia

Herchi¹,

Bahashwan²,

Sakouhi³

et al. 2015

Food Sci. Technol (Campinas)

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The objective of this research was to determine the effect of five years on physico-chemical characteristics and antioxidant activity of flaxseed hull oils. Dil and protein on flaxseed hull varied between 20.15 and 22.56 and 17.45 and 19.14, respectively. The albumin fraction dominated the seed hull protein composition (44 -47%). Flaxseed hull oils showed significantly high unsaturated to saturated fatty acid ratios (6.61 -8.36) and calculated oxidizability (Cox) values (10.88 -12.30). The physiochemical parameters determined included saponification value (SV) (174 -182 mg KDH/g), unsaponifiable matter (UM) (1.32 -1.64%), peroxide value (PV) (1.70 -2.20 mequiv/kg), Dxidation value (DV) (4.40 -5.90) and oil stability (1.10 -1.42 h). The highest content of total phenolic acids and total tocopherols were recorded on hull sample collected in 2008. Flavanoid content ranged from 11 to 19 mg/100 g oil. Antioxidant activity differed significantly; the greatest inhibition (61.38%) was for the hull sample collected in 2008.Keywords: flaxseed hull oil; antioxidant activity; chemical composition.Practical Application: Practical application for the study entitled "Influence of harvest year in the physicochemical properties and antioxidant activity of flaxseed hull oils from Tunisia" regard the possibility of knowing the chemical composition of flaxseed hull produced in Tunisia from autochthonous variety. It is very important to understand if and how harvest year influence the physicochemical characteristics of flaxseed hull. Valuable information will be provided for flaxseed hull breeders and growers in developing and producing functional food resources and products.

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Phenols, flavonoids and antioxidant activity of aqueous and methanolic extracts of propolis (Apis mellifera L.) from Algarve, South Portugal

Cited by 96 publications

References 39 publications

Antioxidant Properties and Protective Effect of Turkish Propolis on t-BHP-Induced Oxidative Stress in Foreskin Fibroblast Cells

Antioxidant Properties and Protective Effect of Turkish Propolis on t-BHP-Induced Oxidative Stress in Foreskin Fibroblast Cells

Physicochemical characterization and antioxidant activity of Palestinian honey samples

Influence of harvest year in the physicochemical properties and antioxidant activity of flaxseed hull oils from Tunisia

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