scholarly journals Effects of Water Deficit Irrigation on Phenolic Composition and Antioxidant Activity of Monastrell Grapes under Semiarid Conditions

Antioxidants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1301
Author(s):  
Eva P. Pérez-Álvarez ◽  
Diego S. Intrigliolo ◽  
María Pilar Almajano ◽  
Pilar Rubio-Bretón ◽  
Teresa Garde-Cerdán
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Deficit Irrigation ◽  
Phenolic Content ◽  
Negative Impact ◽  
Antioxidant Potential ◽  
Total Phenolic ◽  
Vitis Vinifera L ◽  
Phenolic Composition

The high phenolic compound content of grapes makes them an important source of natural antioxidants, among other beneficial health properties. Vineyard irrigation might affect berry composition and quality. Regulated deficit irrigation (RDI) is a widely used strategy to reduce the possible negative impact of irrigation on grapes, improving grape composition and resulting in water savings. Monastrell grapevines (Vitis vinifera L.) grown in eastern Spain were subjected to two water regime strategies: rainfed (non-irrigation) and RDI. The content of anthocyanins, flavonols, flavanols, hydroxybenzoic and hydroxycinnamic acids, and stilbenes was determined by HPLC and was related with total phenolic content and three antioxidant activity methods (ABTS, DPPH, and ORAC). The study aimed to evaluate and compare the phenolic composition and antioxidant potential of Monastrell grapes. The rainfed regime concentrated grapes in terms of phenolic compounds. Thus, total content of anthocyanins, flavonols, flavanols, hydroxybenzoic acids, and total phenols were higher in the rainfed grapes than in the RDI ones. Besides, the rainfed grapes doubled their antioxidant potential with respect to the RDI grapes with the ORAC method. Total phenolic content and antioxidant activity by ORAC assay positively correlated with most of the total phenolic compounds analyzed. This study demonstrates how field practices can modulate final grape composition in relation to their antioxidant activity.

scholarly journals Phenolic composition of vine leaves infusions produced from different Portuguese and Spanish Vitis vinifera L. varieties

2019 ◽  
Vol 12 ◽  
pp. 04004
Author(s):  
A.M. Jordão ◽  
J. Sousa ◽  
A.C. Correia ◽  
M.E. Valdés ◽  
F.M. Nunes ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Vitis Vinifera ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Vitis Vinifera L ◽  
Phenolic Composition ◽  
Alternative Source ◽  
Wide Range ◽  
Interesting Alternative

The main object of the present study was to analyze the phenolic composition of vine leaves infusions prepared from 8 different Portuguese (Fernão Pires, Touriga Franca, Tinta Roriz, Encruzado, Touriga Nacional, Rufete, Baga, and Siria) and Spanish (Pardina, Cayetana, Garnacha, Cigüente, Eva, Tempranillo, Macabeo and Verdelho) Vitis vinifera L. varieties. In general, a wide range of phenolic content were obtained from the vine leaves infusions according to the vine variety used. Thus, for total phenolic content the values ranged from 18 to 37 mg/L for the infusions produced from Portuguese varieties, while for Spanish varieties the values ranged from 14 to 37 mg/L. Vine leaves infusions obtained from Touriga Franca and Pardina varieties showed the highest total phenolic content. As a consequence of phenolic composition, chromatic characteristics (L*, a* and b*) of vine leaves infusions were also analyzed. Finally, it was also detected different individual phenolic compounds, such as, coutaric acid, trans-caftaric acid, quercetin-3-O-glucoside, rutin and 3 different anthocyanins from the different vine leaves infusions. All of the results obtained in this work show that vine leaves infusion may be an interesting alternative source of phenolic compounds for human diet.

scholarly journals Phenolic composition and antioxidant activity of different parts of pistacia vera L.

2016 ◽  
Vol 6 (1) ◽  
pp. 658-664
Author(s):  
Raouia Boumaiza ◽  
Ahmed Snoussi ◽  
Tania Cirkovic-Velickovic ◽  
Nabiha Bouzouita
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Higher Plants ◽  
Variety Identification ◽  
Total Phenolic ◽  
Pistacia Vera ◽  
Phenolic Composition ◽  
Floral Buds

Phenolic compounds are widely distributed in almost all higher plants and are present in different tissues. The quality and quantity of phenolics are used as criteria for variety identification. The present study has been planned to determine the phenolic composition of Pistacia vera. Total phenolic content and concentration of flavonoids of eight different extracts, from the floral buds and leaves of Pistacia vera. (Anacardiaceae) were determined using spectrophotometric methods. The total phenolic content ranged from 401.64 to 513.77 (mg GAE/g DW). The total flavonoid concentrations varied from 8.28 to 67.94 mg CE/g. Antioxidant activity was assessed by three methods: DPPH°+, β-carotene and ABTS and determined respectively as IC50 (mg/mL), CAA and PI (%), all extract have shown to be endowed by a high antioxidant activity similar to that of BHT. Ethanolic extract of male floral buds showed the highest phenolic and flavonoid concentration and the strongest antioxidant activity. The significant linear correlation was confirmed between the values for the total phenolic content and antioxidant activity of plant extracts. Phenolic compounds were investigated by LTQ Orbitrap LC-MS analysis and revealed 17compounds split into 5 groups: Abscisic acids, phenolic acids and their derivatives, flavonols, flavanones, flavones, flavanols. The high contents of phenolic compounds indicated that these last contribute to the antioxidant activity. The Pistacia vera can be regarded as promising candidates for natural plant sources of antioxidants with high value.

scholarly journals Influence of processing on the phenolic compounds of feijoa pulp (Feijoa sellowiana)

2020 ◽  
Vol 11 ◽  
Author(s):  
Ana Carolina Leme Castelucci ◽  
Nataly Maria Viva De Toledo ◽  
Fernanda Francetto Juliano ◽  
Paula Porrelli Moreira Da Silva ◽  
Marta Helena Fillet Spoto
Keyword(s):  
Principal Component Analysis ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Principal Component ◽  
Total Phenolic ◽  
Total Flavonoids ◽  
Phenolic Composition ◽  
And Control

The effect of processing on potential changes of antioxidant activity (DPPH and ABTS), total phenolic content (TPC) and total flavonoids (FLAV) of feijoa pulp during storage was investigated. In addition, possible modifications in the phenolic composition of the pulp. The pulp was subjected to refrigeration (control, 5 °C), pasteurization (85 °C/5 min) and irradiation (2.0 kGy). TPC, FLAV, DPPH and ABTS were measured during 28 days, whereas the identification and quantification of phenolic compounds were conducted after processing. The results were submitted to principal component analysis (SAS 9.4). Pasteurization preserved TPC, DPPH and ABTS for 21 days, while in the irradiated samples and control, the values were decreased and FLAV were maintained at high levels. The profile of phenolic compounds was different for each sample with six compounds being identified.

scholarly journals Effect of Freeze, Oven and Microwave Pretreated Oven Drying on Color, Browning Index, Phenolic Compounds and Antioxidant Activity of Hawthorn (Crataegus orientalis) Fruit

2018 ◽  
Vol 46 (2) ◽  
pp. 449-456 ◽  
Author(s):  
Hacer COKLAR ◽  
Mehmet AKBULUT ◽  
Semih KILINC ◽  
Ali YILDIRIM ◽  
Iliasu ALHASSAN
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Drying Methods ◽  
Drying Method ◽  
Microwave Pretreatment ◽  
Oven Drying ◽  
Freeze Dried

Flowers, leaves and fruits of hawthorn plant are traditionally used for treating diseases like hypertension and atherosclerosis. The medicinal effects of the plant are generally attributed to its phenolic compounds. However, the fruits are perishable materials because of their high content of water, and generally dried and stored to be used outside its season. The main aim of this research was to investigate the effect of different drying methods on phenolic compounds of the hawthorn fruit. Fruits were collected from the wild growing trees in Turkey. De-seeded fruits were dried in freeze-, oven- (60 oC) and microwave pretreated oven drying (microwave application for 5 min at 360 W before drying at 60 oC) methods and analyzed for antioxidant activity, phenolic compounds, total phenolic content and color parameters. Total phenolic content of fresh hawthorn fruits was found as 13.36 mg g-1 DW. Oven- and microwave pretreated oven drying methods had a reductive effect on total phenolic content and antioxidant activity of fruits when compared to freeze drying method. (-)-Epicatechin (994.10 mg kg-1 DW), rutin (765.30 mg kg-1 DW), and procyanidin B2 (553.80 mg kg-1 DW) were the main phenolics of the fruit. Lowest values of these three compounds were observed in oven-dried fruits. Microwave pretreatment oven drying method resulted in browner product. Although the highest phenolic concentration and antioxidant activity were occurred in freeze-dried sample, microwave pretreatment before oven drying could be applied to reduce the time and cost of drying in terms of phenolic compounds and antioxidant activity.

The Effect of Heating Temperature on Total Phenolic Content, Antioxidant Activity, and Phenolic Compounds of Plum and Mahaleb Fruits

2019 ◽  
Vol 15 (11-12) ◽  
Author(s):  
Kashif Ghafoor ◽  
Isam A. Mohamed Ahmed ◽  
Süleyman Doğu ◽  
Nurhan Uslu ◽  
Gbemisola J. Fadimu ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Gallic Acid ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Heating Temperature ◽  
Dry Weight ◽  
Total Phenolic ◽  
Dihydroxybenzoic Acid ◽  
Different Temperatures

AbstractThe effect of heating at different temperatures (60, 80, 90, 110, and 130 °C) on the total phenolic content, antioxidant activity, and phenolic compounds present in plum and mahaleb fruits was investigated. The antioxidant activity values and total phenolic contents of fresh plum (93.82% measured by DPPH method, 787.79 mg gallic acid equivalent (GAE)/100 g dry weight determined by Folin method) and mahaleb fruits (81.80%, 634.47 mg GAE/100 g dry weight) were higher than plum and mahaleb fruits dried at different temperatures (p < 0.05). Generally, the heating process caused a reduction in both total phenolic content and antioxidant activity for plum and mahaleb. While (+)-catechin (92.62 mg/kg), 1,2-dihydroxybenzene (132.15 mg/kg), gallic acid (107.01 mg/kg), and 3,4-dihydroxybenzoic acid (74.59 mg/kg) are the key phenolic compounds in fresh plum, (+)-catechin, 3,4-dihydroxybenzoic acid, 1,2-dihydroxybenzene, and syringic and caffeic acids were the major phenolic compounds of mahaleb fruits. The polyphenol content of fruits and the class of phenolics present are significantly affected by heating temperature.

scholarly journals Variety and Year Impact on Phenolic Content of Arkansas-Grown Sweetpotato Leaves

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 371-371
Author(s):  
Josue Bolanos ◽  
Sun-Ok Lee ◽  
Luke Howard ◽  
Cindi Brownmiller ◽  
Shahidul Islam ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Chlorogenic Acid ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Statistical Significance ◽  
Radical Scavenging ◽  
Dry Weight ◽  
Antioxidant Potential ◽  
Total Phenolic

Abstract Objectives Sweetpotato leaf (SPL) is a natural source of phenolic compounds with potential utility as an antioxidant. The study aimed to measure the impacts of the years on SPL total phenolic content and antioxidant capacity and to identify and quantify the individual phenolic compounds. Methods Sweetpotato leaves in 2018 (27 varieties) and 2019 (24 varieties) were grinded and lyophilized. Phenolic compounds were extracted with 70% ethanol from SPLs. Total phenolic content was determined by Folin-Ciocalteu method and antioxidant potential was determined by DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging assay. Five SPL samples with statistically highest antioxidant capacity were identified and quantified by HPLC. All statistical analyses were carried out by SAS software using ANOVA. Statistical significance was accepted at P &lt; 0.05. Results The average of total phenolic contents in 2018 SPL samples was 43 ± 13 mg gallic acid equivalent (GAE)/g dry weight (DW) SPL whereas in 2019, it was 53 ± 9 mg GAE/g dry weight SPL. Antioxidant capacity in 2018 was 110 ± 75 µmol Trolox equivalent (TE)/g dry weight SPL whereas in 2019, it was 132 ± 32 µmol TE/g dry weight SPL. SPL1 had the highest antioxidant potential, followed by SPL9, SPL3, SPL28, and SPL11 (P &lt; 0.05). The concentrations of major identified phenolics from the five SPL samples (#1, 9, 3, 28, and 11) in dry weight of SPL were: chlorogenic acid at 3.05 ± 0.35 mg/g, 5-monocaffeoylquinic acid (CQA) at 0.71 ± 0.06 mg chlorogenic acid equivalent (ChAE)/g, 4-CQA at 0.99 ± 0.07 mg ChAE/g, 3,4-diCQA at 1.22 ± 0.18 mg ChAE/g, 3,4,5-triCQA at 1.2 ± 0.18 mg ChAE/g, and 3,5-diCQA at 15.5 ± 4.05 mg ChAE/g. 3,5-diCQA, the predominant phenolic, was present in the highest amounts in SPL1. Conclusions The results showed that sweetpotato leaves collected in 2019 contained higher total phenolics and antioxidant capacity than the ones collected in 2018. Phenolic compounds have strong antioxidant activity in Arkansas-grown sweetpotato leaves. This study warrants further investigation of sweetpotato leaves to be utilized as an antioxidant. Funding Sources The work was supported by USDA-NIFA.

scholarly journals STUDI OPTIMASI EKSTRAKSI KANDUNGAN SENYAWA FENOLIK TOTAL DAN UJI AKTIVITAS ANTIOKSIDAN DARI DAUN MANGGIS (Garcinia mangostana Linn.)

2019 ◽  
Vol 10 (1) ◽  
pp. 36
Author(s):  
Emil Salim ◽  
Yogi Afritunando ◽  
Nindi Antika Febriana ◽  
Mai Efdi
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Garcinia Mangostana ◽  
Activity Test ◽  
Ic50 Value ◽  
Dpph Method

This study aims to determine antioxidant activity and total phenolic content of mangosteen leaves in several different solvents. The antioxidant activity test of the extract was determined by the DPPH method and the total phenolic content was determined by the Folin-Ciocalteu method. The phytochemical test of mangosteen leaves showed the presence of phenolic compounds, saponins, triterpenoids and alkaloids. The extraction results increase with increasing water content in methanol, ethanol and acetone. The highest amount of extract was obtained using 50% acetone solvent (34.98 ± 0.17%). Extraction using 100% ethanol showed the highest total phenolic content (614.25 ± 5.58 mg GAE / g extract) and the lowest IC50 value (5.81 mg / L). The results of this study indicate that the use of 50% acetone solvent can optimize the amount of extract and 100% ethanol can optimize the content of total phenolic compounds and antioxidant activity of mangosteen leaves.

scholarly journals A Comparative Study on the Phenolic Composition and Biological Activities of Morus alba L. Commercial Samples

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3082 ◽  
Author(s):  
Milena Polumackanycz ◽  
Tomasz Sledzinski ◽  
Elzbieta Goyke ◽  
Marek Wesolowski ◽  
Agnieszka Viapiana
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Inhibitory Activity ◽  
Antioxidant Potential ◽  
Total Phenolic ◽  
Phenolic Composition ◽  
Herbal Products ◽  
Water Extracts ◽  
Ache Inhibitory Activity ◽  
White Mulberry

Morus alba L. (white mulberry) has been commonly used as a functional food and for medicinal purposes. Hence, the aim of the study was to compare the phenolic profile of white mulberry commercial samples in relation to their antioxidant potential and acetylcholinesterase (AChE) inhibitory activity. It is of interest to determine whether herbal products originating from different commercial sources differ in their phenolic profiles. For this purpose, a simple and rapid high-performance liquid chromatography (HPLC) method was used for the separation and determination of ten major phenolic compounds. Total phenolic (TPC), total flavonoid (TFC), and total phenolic acid contents (TPAC), as well as l(+)-ascorbic acid (ASA) contents, were determined. The antioxidant potential was assessed by DPPH (2,2-diphenyl-1-picrylhydrazyl radical) scavenging activity and ferric-reducing/antioxidant power (FRAP) assay, while the AChE inhibitory activity was determined by the Ellman assay for water extracts. The study revealed that excluding two herbal products containing fruits and a sample containing leaves of white mulberry, yerba mate and lemon, the remaining samples were generally consistent in terms of phenolic composition as well as antioxidant potential and AChE inhibitory activity. This reflects the health-promoting properties of the samples under study. Moreover, the results showed that the water extracts of white mulberry were richer in phenolic compounds and presented higher antioxidant activity than the hydromethanolic extracts. However, the water extracts showed low inhibitory activity against AChE. Moreover, the correlation analysis indicated a high positive relationship between phenolic composition and antioxidant activity in extracts of white mulberry. Overall, the obtained results may be useful in the evaluation of new dietary supplements and food products. The water extracts of white mulberry could be used for antioxidant purposes, while the hydromethanolic extracts could be incorporated in antioxidant formulations.

Estimation of total Phenolic and ϑlavonoids content and Studies on antioxidant activity of different extracts of Olax scandens by FRAP assay

2020 ◽  
Vol 11 (3) ◽  
pp. 3367-3371
Author(s):  
Pranaya P ◽  
Akiladevi D
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Potential ◽  
Total Phenolic ◽  
Frap Assay ◽  
Aerial Parts ◽  
Reducing Ability ◽  
Ic50 Value

Olax scandens Roxb. (family Olacaceae) available in throughout tropical India. The current study, aerial parts of different concentrates of Olax scandens was evaluated for its in-vitro antioxidant potential by FRAP assay taking ascorbic acid as the standard and estimation of total phenolic content and flavonoids content. The IC50 value was originated that methanolic concentrates of Olax scandens are more efficient in antioxidant activity by FRAP methods compared EA & PE concentrates. The methanolic concentrates of Olax scandens & ascorbate exhibited antioxidant potential possessing IC50 207µg/ml & 50µg/ml by Ferric reducing ability Power assay. The methanolic and EA concentrates of Olax scandens showed the total phenolic content (14.426 ± 0.032, 4.128 ± 0.025) respectively, and ৒lavonoids content (11.526 ± 0.054, 3.682 ± 0.042) respectively. Invitro antioxidant studies show methanolic concentrates of Olax scandens have better antioxidant activity as well as a higher content of total phenolic and flavonoids content. These results indicate that aerial parts of methanolic concentrates Olax scandens could serve as a natural antioxidant, which may be useful in preventing free radical-induced diseases.

Phenolic Composition and Antioxidant Activity of Leaves of Strawberry Tree (Arbutus unedo L.) Populations from Morocco

2021 ◽  
Author(s):  
Z. Ait lhaj ◽  
K. Taghzouti ◽  
A. Bouyahya ◽  
G. Diria ◽  
K. Bakhy ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Gallic Acid ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Phenolic Composition ◽  
Leaf Extracts ◽  
Arbutus Unedo ◽  
Scavenging Effect ◽  
Promising Source

This study was aimed at determining the phenolic composition and the antioxidant activity of leaves of Arbutus unedo populations belonging to seven Moroccan locations. Antioxidant activity is evaluated using two methods: scavenging effect on DPPH and scavenging effect on ABTS radicals. The Arbutus unedo leaf extracts displayed average values of 61.95 mg GAE, 3.60 mg QE, and 0.15 mg CE per g of dry weight (DW) in polyphenols, flavonoids, and tannins contents, respectively. All extracts exhibited a strong antioxidant effect on both assays, presenting mean IC50 values of 4.22 in DPPH assay and 4.86 μg/ml in ABTS assay. Significant variability (P < 0.0001) was showed among surveyed populations; samples from the Chefchaouen location (CH) was revealed the highest total phenolic content (107.67 mg GAE/g DW) and the strongest antioxidant activity (IC50 values of 0.80 and 1.56 μg/ml, in DPPH and ABTS tests, respectively). The phenolic profile achieved by HPLC-DAD-ESI/MS was dominated by gallic acid, Gallic acid glucose derivative, and Galloylquinic acid derivative. A significant negative correlation (P < 0.05) was observed between the total phenolic content and the antioxidant activity. These results provide that Arbutus unedo leaves should be considered as a promising source of natural antioxidants, and as ingredients in complimentary food and nutraceutical products.

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