scholarly journals Phenolic profile and antioxidant activity of free/bound phenolic compounds of sesame and properties of encapsulated nanoparticles in different wall materials

2022 ◽  
Author(s):  
Reza Esmaeilzadeh Kenari ◽  
Razie Razavi
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Phenolic Profile ◽  
Wall Materials ◽  
Encapsulated Nanoparticles

scholarly journals Phenolic profile and antioxidant activity of bee pollen extracts from different regions of Algeria

2020 ◽  
Vol 31 (2) ◽  
pp. 93-98
Author(s):  
Hadia Hemmami ◽  
Bachir Ben Seghir ◽  
Mustapha Ben Ali ◽  
Abdelkrim Rebiai ◽  
Soumeia Zeghoud ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
High Performance ◽  
Pollen Grains ◽  
Biochemical Properties ◽  
Total Phenolic ◽  
Flavonoid Content ◽  
Phenolic Profile ◽  
Bee Pollen ◽  
Full Diet

AbstractDue to its complex biochemical properties, the bee pollen is considered one of the functional foods. Bee pollen collected from pollen grains from different botanical sources offers almost a full diet such as carbohydrates, proteins, amino acids, vitamins, minerals. In this study, methanol extracts of 13 honeybee pollen samples were evaluated for flavonoids, phenolic compounds, and antioxidant capacity. Caffeic acid, chlorogenic acid, vanillic acid, p-coumaric acid, gallic acid, quercetin, rutin, vanillin, and naringin were identified as main phenolic compounds in pollen extracts by High-Performance Liquid Chromatography (HPLC) analysis. The obtained results are: total phenolic content - 379.8 to 915.6 mg GAE/100 g, total flavonoid content - 207.1 to 550 mg QE/100 g, and antioxidant activity - 808.2 to 3311 mg GAE/100 g in bee pollen extracts.

scholarly journals Antioxidant Activities of Vaccinium vitis-idaea L. Leaves within Cultivars and Their Phenolic Compounds

Molecules ◽  
2019 ◽  
Vol 24 (5) ◽  
pp. 844 ◽  
Author(s):  
Lina Raudone ◽  
Gabriele Vilkickyte ◽  
Lina Pitkauskaite ◽  
Raimondas Raudonis ◽  
Rimanta Vainoriene ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Positive Influence ◽  
Phenolic Profile ◽  
Structure Activity ◽  
The Subject ◽  
Potential Use

Lingonberry leaves are the subject of numerous studies because of antioxidant properties, positive influence on the health and potential use in the prevention and treatment of chronic diseases. In this work, the radical scavenging, reducing, chelating activities, and phenolic composition of ten lingonberry leaves cultivars, one subspecies, and one variety were investigated. Furthermore, the antioxidant activity of individual phenolic compounds, that can be found in lingonberry leaves, were analyzed, and structure-activity relationship was determined. Wide diversity for phenolic profile and antioxidant properties of lingonberry leaves has been observed in the present material. Cultivars ‘Kostromskaja rozovaja’, ‘Rubin’, and Vaccinium vitis-idaea var. leucocarpum surpassed all others tested cultivars and lower taxa by contents of phenolic compounds and antioxidant activity. Leaves of lingonberry cultivars and lower taxa are rich in arbutin, flavonol glycosides, proanthocyanidins, and the latter were considered to be the major contributor to antioxidant properties of lingonberry leaves.

scholarly journals Characterisation of phenolics and other quality parameters of different types of honey

2016 ◽  
Vol 34 (No. 3) ◽  
pp. 244-253 ◽  
Author(s):  
Halouzka Rostislav ◽  
Tarkowski Petr ◽  
Zeljković Sanja Ćavar
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Physicochemical Parameters ◽  
Natural Antioxidants ◽  
Quality Parameters ◽  
Radical Scavengers ◽  
Phenolic Profile ◽  
General Picture ◽  
Different Types ◽  
The Mean

In order to provide a general picture of phytochemical characteristics of nectar honey, honeydew, and mixed honeys, an overall comparison of physicochemical parameters, and phenolic profile as well as antioxidant activity of various types of honey samples has been made. Among all samples analysed, honeydew samples possess the best quality parameters in the mean content of hydroxymethylfurfural, proline, and diastase activity. Moreover, the highest content of phenolic compounds as potential radical scavengers was found in honeydews, then in mixed and multifloral nectar honeys, while samples of monofloral honeys revealed the lowest, but still considerable amounts of natural antioxidants. The overall results of this study indicate that the quality parameters as well as the distribution of phenolic acids and flavonoids are affected by the type of honey.

scholarly journals LC-ESI-QTOF-MS/MS Characterisation of Phenolics in Herbal Tea Infusion and Their Antioxidant Potential

Fermentation ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 73
Author(s):  
Osbert Chou ◽  
Akhtar Ali ◽  
Vigasini Subbiah ◽  
Colin J. Barrow ◽  
Frank R. Dunshea ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Liquid Chromatography ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Antioxidant Potential ◽  
Venn Diagram ◽  
Herbal Tea ◽  
Phenolic Profile ◽  
Tea Infusion

Ginger (Zingiber officinale R.), lemon (Citrus limon L.) and mint (Mentha sp.) are commonly consumed medicinal plants that have been of interest due to their health benefits and purported antioxidant capacities. This study was conducted on the premise that no previous study has been performed to elucidate the antioxidant and phenolic profile of the ginger, lemon and mint herbal tea infusion (GLMT). The aim of the study was to investigate and characterise the phenolic contents of ginger, lemon, mint and GLMT, as well as determine their antioxidant potential. Mint recorded the highest total phenolic content, TPC (14.35 ± 0.19 mg gallic acid equivalent/g) and 2,2′-azino-bis(3-e-thylbenzothiazoline-6-sulfonic acid), ABTS (24.25 ± 2.18 mg ascorbic acid equivalent/g) antioxidant activity. GLMT recorded the highest antioxidant activity in the reducing power assay, RPA (1.01 ± 0.04 mg ascorbic acid equivalent/g) and hydroxyl radical scavenging assay, •OH-RSA (0.77 ± 0.08 mg ascorbic acid equivalent/g). Correlation analysis showed that phenolic content positively correlated with the antioxidant activity. Venn diagram analysis revealed that mint contained a high proportion of exclusive phenolic compounds. Liquid chromatography coupled with electrospray ionisation and quadrupole time of flight tandem mass spectrometry (LC-ESI-QTOF-MS/MS) characterised a total of 73 phenolic compounds, out of which 11, 31 and 49 were found in ginger, lemon and mint respectively. These characterised phenolic compounds include phenolic acids (24), flavonoids (35), other phenolic compounds (9), lignans (4) and stilbene (1). High-performance liquid chromatography photometric diode array (HPLC-PDA) quantification showed that GLMT does contain a relatively high concentration of phenolic compounds. This study presented the phenolic profile and antioxidant potential of GLMT and its ingredients, which may increase the confidence in developing GLMT into functional food products or nutraceuticals.

scholarly journals Impact of Abiotic Stresses (Nitrogen Reduction and Salinity Conditions) on Phenolic Compounds and Antioxidant Activity of Strawberries

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1044
Author(s):  
José L. Ordóñez-Díaz ◽  
Vanessa Cardeñosa ◽  
José M. Muñoz-Redondo ◽  
Federico Ferreres ◽  
Gema Pereira-Caro ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Abiotic Stresses ◽  
High Salinity ◽  
Phenolic Content ◽  
Fragaria X Ananassa ◽  
Total Phenolic ◽  
Saline Stress ◽  
Phenolic Composition ◽  
Phenolic Profile

This study evaluated the phenolic profile and the antioxidant capacity of strawberries (Fragaria x ananassa Duch., cv. Primoris) cultivated under reduction of nitrogen and adverse irrigation conditions (high salinity), such as those prevailing in Almeria (south-eastern Spain). The phenolic compound and anthocyanin profiles were analysed by HPLC-DAD-ESI/MSn, and the antioxidant activity. Nineteen phenolic compounds were quantified, mainly ellagitannins, anthocyanins, and flavan-3-ols. The total phenolic content ranged from 731 to 1521 mg/100 g of dried weight. The flavan-3-ols group compounds from the strawberries were positively affected by saline stress, especially the afz-(e)Catechin content in the first sampling. The reduction of nitrogen and the adverse irrigation conditions for the cultivation of strawberries (cv. Primoris) partially affected the phenolic composition, with the harvesting dates having a greater influence.

scholarly journals Phenolic compounds of Pyrus communis fruit methanol extract and evaluation of antioxidant activity

2020 ◽  
Vol 10 (6) ◽  
pp. 106-109
Author(s):  
Soulef Saoudi ◽  
Seddik Khennouf ◽  
Nozha Mayouf
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Methanol Extract ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Pyrus Communis ◽  
Scavenging Activity ◽  
Phenolic Profile ◽  
Dry Extract

Pear (Pyrus communis.) fruit is popular among consumers due to its high nutritive value, good taste and low caloric level. This study examined polyphenolic content, antioxidant activity and phenolic profile of methanol extract of Pyrus communis fruit. Extract were screened for possible antioxidant activities using free radical scavenging activity of DPPH, hydroxyl scavenging activity and reducing power assays. This extract contain high polyphenolic and flavonoids contents (172.5 ± 0.005 mg GAE/g dry extract and 5.34 ± 0.003mg QE/g dry extract) respectively. Similarly, this extract showed high antioxidant activity using DPPH, hydroxyl radical scavenging and reducing power with an IC50 value of 0.682 ± 0.022 mg/ml, 0.47 ± 0.06 mg/ml and 1.17 ± 0.029 mg/ml respectively. The phenolic profile in the methanolic extracts was investigated using Ultra high liquid chromatography (UPLC). Four different phenolic acids gallic acid, chlorogenic acid, hydroxybenzoic acid and protocatechuic acid have been identified. Some flavonoids have also been identified such as rutin and kaempherol derivative. In conclusion, the present study showed that Pyrus communis exhibited good antioxidant activity which is probably related to phenolics and flavonoids present in the extract. Keywords: Pyrus communis, phenolic compounds, flavonoids, antioxidant activity.

scholarly journals Phenolic profile of some fruit wines and their antioxidant properties

2016 ◽  
Vol 70 (6) ◽  
pp. 661-672 ◽  
Author(s):  
Uros Cakar ◽  
Aleksandar Petrovic ◽  
Marijana Zivkovic ◽  
Vlatka Vajs ◽  
Miodrag Milovanovic ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Antioxidant Properties ◽  
Correlation Method ◽  
Antioxidant Compounds ◽  
Frap Assay ◽  
Phenolic Profile ◽  
Spectrophotometric Methods ◽  
Beneficial Effects

The composition and content of individual phenolic compounds in various fruit wines and overall antioxidant properties of these fruit wines were studied. Phenolic compounds were separated by reverse phase (RP) HPLC techniques, and their content was determined by means of mass spectrometer (MS) with triple quadrupole (TQ) analyser, which recorded specific precursor-product transitions. Antioxidant activity was monitored by the following spectrophotometric methods: DPPH, FRAP and Folin-Ciocalteu assay, respectively. Four types of berries (raspberry, blackberry, chokeberry and blueberry), one type of pome (apple) and one type of stone fruit (cherries) were used for the production of fruit wines. Corresponding fruit wines were produced by microvinification with or without adding sugar into the must before fermentation. Increase in alcohol level was responsible for the increased content of phenolic compounds in fruit wine due to improved extraction conditions. Produced fruit wines were preserved by adding SO2 which interferes with the determination of antioxidant activity of phenolic compounds. In this case, the development of a correlation method based on FRAP assay was introduced. Fruit wines are a rich source of substances which show beneficial effects on human health. Depending on the fruit type, different antioxidant compounds were predominant in wine samples.

scholarly journals Phenolic Profile and Antioxidant Activity of Ethanolic Extract of Larrea cuneifolia Cav. Leaves

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 37
Author(s):  
Maria Emilia Lorenzo ◽  
Patricia Elizabeth Gómez ◽  
Eugenia Sabatino ◽  
Adrián Federico Segovia ◽  
Lara Carolina Figueroa ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Antioxidant Properties ◽  
Ethanolic Extract ◽  
Central Valley ◽  
Cell Types ◽  
Phenolic Profile ◽  
Antioxidant Characteristics ◽  
Derivatives Of

The genus of the Zygophyllaceae family includes evergreen shrub species. Background highlights the antioxidant and anti-tumor activity of Larrea divaricate and nordihydroguayaretic acid (NDGA) due to their potential as a dietary supplement and food preservative, but little is known about Larrea cuneifolia. The aim of this work was to determine the antioxidant characteristics of ethanolic extracts of L. cuneifolia leaves collected in the central valley of Catamarca (Argentina). Total polyphenols content (TP) was determined by Folin-Ciocâlteu and the phenolic profile by HPLC-PDA-QTOF. The antioxidant activity was measured by in vitro (FRAP, TEAC and DPPH) and cellular (HepG2 and Caco2 cells) assays. The phenolic compounds identified were mainly derivatives of NDGA and flavonols derivatives of quercetin, kaempferol, isorhamnetin and gossypetin. TP content and antioxidant activity exceeded the values reported for L. divaricata. With regard to cytotoxicity, an increase in this parameter could be observed with the increase in the concentration of polyphenols in both cell types. Furthermore, in cells exposed to H2O2, a significant decrease in reactive oxygen species (ROS) concentration was observed for HepG2 cells. This effect can be used to study compounds with bioactivity on tumor cells. L. cuneifolia is a species rich in phenolic compounds, with antioxidant properties, and is a potential source of bioactive compounds for the production of functional foods.

Phenolic profile and antioxidant activity of buckwheat (Fagopyrum esculentum) herb and root extracts

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
D Orcic ◽  
E Svirčev ◽  
N Mimica-Dukic ◽  
I Beara ◽  
K Balog ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Fagopyrum Esculentum ◽  
Phenolic Profile ◽  
Root Extracts
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