scholarly journals Olive Paste-Enriched Cookies Exert Increased Antioxidant Activities

2021 ◽  
Vol 11 (12) ◽  
pp. 5515
Author(s):  
Eleni-Anna Argyri ◽  
Stylianos-Panagiotis Piromalis ◽  
Antonios Koutelidakis ◽  
Dimitrios Kafetzopoulos ◽  
Andreas S. Petsas ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Total Phenolics ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Total Phenolic ◽  
Strongly Correlated ◽  
Unsaturated Fat ◽  
Daily Diet ◽  
The Impact

Functional foods are beneficial to human health and are part of the daily diet of people trying to follow a healthier lifestyle. Olive paste is a good source of functional compounds, mainly phenolic compounds, that have been shown to have health benefits. At the same time, cookies are an ideal snack that can be fortified with additional ingredients to address human dietary needs. The study aimed to enrich cookies with olive paste and extra ingredients for flavor differentiation and evaluate the impact of the enrichment on their antioxidant properties. Enriched cookies were prepared analyzed and tested for sensorial acceptability, total phenolics, and antioxidant activities by DPPH, ABTS, FRAP, and CUPRAC assays. Enriched cookies were sensorially acceptable. Unsaturated fat, total phenolics, and antioxidant activities of enriched cookies were higher compared to control cookies, while among enriched cookies the extra addition of 1% garlic, 0.5% thyme, and 0.5% oregano resulted in higher total phenolics and antioxidant activities compared to cookies that were flavored either with 3% vegetables or 3% orange zest. Antioxidant activity in cookies was strongly correlated with total phenolic content. Cookies enriched with olive paste may be healthy functional food in terms of increased antioxidant activity.

scholarly journals EFFECT OF MATURITY STAGES AND SOLVENT POLARITY ON PHENOLIC CONTENT AND ANTIOXIDANT CAPACITY OF GUAVA CULTIVARS

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
Surabhi Shukla ◽  
Radha Kushwaha ◽  
Monika Singh ◽  
Jyotsana Singh ◽  
Vinita Puranik ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolics ◽  
Antioxidant Activities ◽  
Solvent Polarity ◽  
Total Phenolic ◽  
Maturity Stages ◽  
Ripening Stages

Tropical fruits claim to have phenolic compounds that have been reported to possess strong antioxidant activity. The study investigatedantioxidant activity and total phenolic content of five Guava cultivars namely Allahabad Safeda, Allahabad Surkha, Lalit, Chittidar and Apple color harvested at three fruit ripening stages (unripe, semi-ripe and ripe) and extracted by four solvents (ethanol, methanol, acetone and water) with different polarities (50%, 70% and 100%).The findings suggest that guava cultivars with maturity stages and extracting solvent affected its phenolic content and antioxidant activity significantly. Pure solvents were inefficient extraction medium for antioxidants. Enhanced extraction yields were obtained from solvent containing higher water concentrations and 50% ethanol is a recommended solvent for extracting antioxidants compounds from guava fruit. High correlations between phenolic compositions and antioxidant activities of guava extracts were observed. The total phenolics and antioxidant capacity decreases as the ripening proceeds (unripe>semi-ripe>ripe) in all five cultivars.This study facilitates information on the total phenolic content and antioxidant capacities of guava cultivars which is an important commercial fruit. Results obtained showed that solvent polarities and ripening stages played the major role in extraction of ployphenolics from Guava. The significant declines in the levels of total phenolics and antioxidant capacity during fruit development suggest that the unripe fruits can also be taken for processing into nutraceutical foods.

Comparative Antioxidant Potential of Bark and Leaves of Terminalia arjuna (Roxb) Wight & Arn from Himachal Pradesh

2017 ◽  
Vol 6 (1) ◽  
pp. 27 ◽  
Author(s):  
Vikas Kumar ◽  
Kamal Dev ◽  
Anuradha Sourirajan ◽  
Prem Kumar Khosla
Keyword(s):  
Antioxidant Activity ◽  
Gallic Acid ◽  
Phenolic Content ◽  
Total Phenolics ◽  
Antioxidant Activities ◽  
Ethanolic Extract ◽  
Terminalia Arjuna ◽  
Total Phenolic ◽  
Flavonoid Content ◽  
Phenolic And Flavonoid

The present study aimed to compare antioxidant activities, total phenolic and flavonoid content present in leaves and bark of Terminalia arjuna and check whether there is any correlation between phenolic content and flavonoid content with antioxidant activities or not. Phytochemical screening of ethanolic extract of leaves and bark revealed the presence of phenols, flavonoids, tannins, carbohydrates, glycosides, saponin, phytosterols and phytosteroids. Total phenolic content was found to be higher in bark (272.71±3.18 mg/g gallic acid equivalents) as compared to that of leaves (95±3.11 mg/g gallic acid equivalents). Similarly, flavonoid content of ethanolic extract of bark was found to be higher (203.95±5.13 mg/g rutin equivalents) than that of leaves (87.625±4.28 mg/g rutin equivalents). DPPH activity of ethanolic extract of bark (IC50-17.41 µg/ml) was more than that of leaves (IC50-20.22µg/ml). FRAP activity of bark (IC50- 4.781 µM Fe (II) equivalents) is more than that of leaves (IC50-7.572 µM Fe (II) equivalents). Nitric oxide (NO) scavenging activity of bark (IC50-12.87 µg/ml) was higher than that of leaves (IC50-13.91 µg/ml).The present study clearly showed that there is a correlation between total phenolics, flavonoid contents and antioxidant activity of leaves and bark of T. arjuna. The phenolic compounds and flavonoids could be major contributor to antioxidant activity of T. arjuna. Keywords: Terminalia arjuna, DPPH, FRAP, NO, IC50, Antioxidants

scholarly journals Antioxidant activity and phenolic content of leaf infusions of Myrtaceae species from Cerrado (Brazilian Savanna)

2015 ◽  
Vol 75 (4) ◽  
pp. 948-952 ◽  
Author(s):  
L. K. Takao ◽  
M. Imatomi ◽  
S. C. J. Gualtieri
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Activity Index ◽  
Antioxidant Properties ◽  
Natural Antioxidants ◽  
Brazilian Savanna ◽  
Total Phenolic ◽  
Plant Materials ◽  
Dpph Method

Abstract There is considerable interest in identifying new antioxidants from plant materials. Several studies have emphasized the antioxidant activity of species belonging to the Myrtaceae family. However, there are few reports on these species from the Cerrado (Brazilian savanna). In this study, the antioxidant activity and phenolic content of 12 native Myrtaceae species from the Cerrado were evaluated (Blepharocalyx salicifolius, Eugenia bimarginata, Eugenia dysenterica, Eugenia klotzschiana, Hexachlamys edulis, Myrcia bella, Myrcia lingua, Myrcia splendens, Myrcia tomentosa, Psidium australe, Psidium cinereum, and Psidium laruotteanum). Antioxidant potential was assessed using the antioxidant activity index (AAI) by the DPPH method and total phenolic content (TPC) by the Folin–Ciocalteu assay. There was a high correlation between TPC and AAI values. Psidium laruotteanum showed the highest TPC (576.56 mg GAE/g extract) and was the most potent antioxidant (AAI = 7.97, IC50 = 3.86 µg·mL−1), with activity close to that of pure quercetin (IC50 = 2.99 µg·mL−1). The extracts of nine species showed IC50 of 6.24–8.75 µg·mL−1. Most species showed TPC and AAI values similar to or higher than those for Camellia sinensis, a commonly consumed tea with strong antioxidant properties. The results reveal that the analyzed Myrtaceae species from the Cerrado possess high phenolic contents and antioxidant activities. Thus, they are a potential source of new natural antioxidants.

scholarly journals Characteristics and antioxidant properties of cold pressed high oleic and linoleic oils from Mexican safflower varieties

2019 ◽  
pp. 679
Author(s):  
Athziri Longoria-Sanchez ◽  
Maribel Valdez Morales ◽  
B. Dave Oomah ◽  
Xochilt M. Ochoa-Espinoza ◽  
Andrés M. Góngora-Gómez ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Fatty Acid ◽  
Antioxidant Activities ◽  
Fatty Acid Content ◽  
Antioxidant Properties ◽  
Physicochemical Characteristics ◽  
Total Phenolic ◽  
Strongly Correlated ◽  
High Oleic ◽  
Cold Pressed

Six cold press oil extracted from high oleic and linoleic Mexican safflower varieties resistant/tolerant to Ramularia carthami were evaluated for their composition, physicochemical characteristics and antioxidant activity. High oleic varieties were rich in oleic (65-78%), linoleic (9-15%), palmitic (2-5%) and stearic (3-5%) acids, whereas high linoleic oils contained 76-79% linoleic, 6-9% oleic, palmitic 6-10% and 3-5% stearic acids. Calculated oxidative stability was highly associated with monounsaturated fatty acid content. High linoleate safflower oils had significantly (p < 0.05) higher b*, ∆E, absorbance (K232 and K272), conjugated diene, triene, peroxide and totox values, total phenolics and ORAC antioxidant activity than high oleate oils. Oil characteristics were strongly correlated with their fatty acid profile, particularly the monounsaturated/polyunsaturated ratio. Total phenolic content was moderately associated with the antioxidant activities of safflower oils (r = 0.714 and 0.540, p < 0.001 for DPPH and ORAC, respectively).

scholarly journals Determination of the Phenolic Content in Iranian Trehala Manna and Evaluation of Their Antioxidant Effects

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Farzaneh Darikvand ◽  
Mehrdad Ghavami ◽  
Masoud Honarvar
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Major Type ◽  
Total Phenolic ◽  
Ferric Ion ◽  
Pharmaceutical Industries

One of the most challenging issues in the food and pharmaceutical industries is finding effective and safe antioxidants from natural resources compared to their synthetic compounds, which have side effects. In this regard, Trehala manna was considered a great antioxidant source categorized as the major type of manna produced naturally and by the Echinops plant in response to insect activity. In this study, the antioxidant activity and phenolic content of the numerous Trehala manna in Echinops sp. have been investigated. Different methods of radical scavenging activity comprising 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) have been investigated to evaluate antioxidant activity. The phenolic contents were measured by Folin–Ciocalteu and standard phytochemical methods. Quantitative and qualitative amounts of phenolic content, including caffeic, ferulic, coumaric, syringic, and hydroxybenzoic acids, were quantified by high-performance liquid chromatography (HPLC). The results indicated the significant changes in the amounts of phenolics and the antioxidant properties in Trehala manna samples, based on the place of collection. Based on results, antioxidant capacity detected by DPPH and ABTS tests showed the IC50 values of 40–94 µg/mL and 28–72 µg/mL, respectively. Results of the FRAP test represented very strong ferric ion reducing activities (0.04–0.83 mmol Fe2+/g). Ferric ion reducing data were not markedly different from ABTS and DPPH ones. These samples also presented the highest phenolic content (1.32–2.28 mg GAE/100 g). Jahrom Trehala manna was the highest in both phenolic content and antioxidant value, while Sabzevar was the lowest. We found a significant relationship between the antioxidant values and total phenolic counts. It indicates that the phenolics contribute to the observed antioxidant activities of these samples.

scholarly journals Evaluation of total phenolic content and antioxidant activity of malting and hulless barley grain and malt extracts  

2017 ◽  
Vol 35 (No. 1) ◽  
pp. 73-78 ◽  
Author(s):  
Šimić Gordana ◽  
Horvat Daniela ◽  
Dvojković Krešimir ◽  
Abičić Ivan ◽  
Vuletić Marija Viljevac ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolics ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Barley Grain ◽  
Total Phenolic ◽  
Malt Extract ◽  
Hulless Barley

Nine malting and six hulless barley varieties were evaluated for their grain characteristics, β-glucans, total phenolic contents, and corresponding antioxidant activities determined by DPPH radical scavenging method. Samples were malted to compare malt quality properties between hulled and hulless types of barley and to estimate the influence of malting process on total phenolics. The highest levels of total phenolics and antioxidant activity were observed in the hulless barley lines GZ-191 and GZ-186. Malts were found to have higher antioxidant activity and contents of total phenolics than their corresponding barley. Results from the present study showed that hulless barley lines had on average higher protein, starch, β-glucan, malt extract content, and wort viscosity, but lower Kolbach Index and malt friability when compared to hulled malting varieties. The analysis of fifteen different barley samples shows that the barley type has an influence on both the total phenolic content and the antioxidant activity, as well as on the malting performance of hulless and hulled barley.

SKRINING FITOKIMIA DAN UJI AKTIVITAS ANTIOKSIDAN DAN ANTITUMOR 20 TUMBUHAN OBAT ASAL KABUPATEN MANOKWARI

2008 ◽  
Vol 7 (1) ◽  
Author(s):  
Bimo Budi Santoso
Keyword(s):  
Antioxidant Activity ◽  
Medicinal Plants ◽  
Antitumor Activity ◽  
Traditional Method ◽  
Extraction Efficiency ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Phenolic Contents ◽  
Total Phenolic Contents

<strong><em>Flavanoid, steroid, and terpenoid contents of 20 Manokwari medicinal plants were analyzed.  The antioxidant activity, total phenolic contents and antitumor activity of 20 Manokwari medicinal plants were also evaluated. The result shows that 83% positif to flavanoid test, 59% positif to terpenoid test and only 25% positif steroid. Antioxidant activity and total phenolic contents evaluated using Ferric Thiocianate (FTC) and Folin-Ciocalteu methods respectively. Antioxidant activity and total phenolic contents of medicinal plants were extracted by the traditional method, boiling in water and also in 80% methanol. Twenty plants evaluated in both exstracts have significantly varies of antioxidant activities and phenolic contents,  A significant and linier correlation coefficient between the antioxidant activity and the total phenolic content was found in both aqueous (R<sup>2</sup>= 0,77) and methanol (R<sup>2</sup> = 0,85). Antitumor activity was tested using cell maurine P-388 and only 2 of medicinal plants are active to inhibit cell maurine P-388. Comparing extraction efficiency of the two methods, the methanol extracted phenolic compounds more efficiently, and antioxidant activity of the extract was higher.</em></strong>

Evaluation of diuretic and antioxidant properties in aqueous bark and fruit extracts of pine

2020 ◽  
Vol 17 ◽  
Author(s):  
Hadi Shariati ◽  
Mohammad Hassanpour ◽  
Gholamreza Sharifzadeh ◽  
Asghar Zarban ◽  
Saeed Samarghandian ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Antioxidant Properties ◽  
Pine Bark ◽  
Male Rats ◽  
Total Phenolic ◽  
Dependent Manner ◽  
Aqueous Extracts ◽  
Antioxidant Power ◽  
Dose Dependent

Objective: The present study has been carried out to evaluate the diuretic and antioxidant properties of pine herb in an animal model. Materials and Methods: 45 adult male rats were randomly divided into nine groups including: groups I (the negative control), groups II (positive control, furosemide 10 mg/kg), groups III to VIII (treatment groups received 100, 200, 400 mg/kg of the aqueous extracts of bark and fruit) and group IX received the combination of aqueous extract of bark (100 mg/kg) and the fruit (100 mg/kg). The urine output, glomerular filtration rate (GFR), electrolytes, urea, and creatinine levels were evaluated . Furthermore, the phenolic content and antioxidant activity of both extracts were also assessed using 2, 2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) and Folin–Ciocalteu methods. Results: The aqueous extracts of the pine bark and fruit increased the urinary output in a dose-dependent manner. The combination of the two extracts compared to the other extracts alone significantly increased the serum potassium level. This study also showed each extract increase creatinine clearance in a dose-dependent manner (p<0.01 and p<0.05). The increase of GFR in the combination group was not significant. The current data showed a significant increase in the total phenolic content in pine bark extract in compared with the fruit extract. Conclusion: The pine bark and fruit can be useful in the prevention and treatment of kidney stones due to the high antioxidant activity.

scholarly journals Effect of particle size on phytochemical composition and antioxidant properties of Sargassum cristaefolium ethanol extract

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. S. Prasedya ◽  
A. Frediansyah ◽  
N. W. R. Martyasari ◽  
B. K. Ilhami ◽  
A. S. Abidin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Ethanol Extract ◽  
Total Phenolic ◽  
Particle Sizes ◽  
Epicatechin Gallate ◽  
Particle Size Reduction ◽  
Phytochemical Composition

AbstractSample particle size is an important parameter in the solid–liquid extraction system of natural products for obtaining their bioactive compounds. This study evaluates the effect of sample particle size on the phytochemical composition and antioxidant activity of brown macroalgae Sargassum cristaefolium. The crude ethanol extract was extracted from dried powders of S.cristeafolium with various particle sizes (> 4000 µm, > 250 µm, > 125 µm, > 45 µm, and < 45 µm). The ethanolic extracts of S.cristaefolium were analysed for Total Phenolic Content (TPC), Total Flavonoid Content (TFC), phenolic compound concentration and antioxidant activities. The extract yield and phytochemical composition were more abundant in smaller particle sizes. Furthermore, the TPC (14.19 ± 2.08 mg GAE/g extract to 43.27 ± 2.56 mg GAE/g extract) and TFC (9.6 ± 1.8 mg QE/g extract to 70.27 ± 3.59 mg QE/g extract) values also significantly increased as particle sizes decreased. In addition, phenolic compounds epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC), and Epigallocatechin gallate (EGCG) concentration were frequently increased in samples of smaller particle sizes based on two-way ANOVA and Tukey’s multiple comparison analysis. These results correlate with the significantly stronger antioxidant activity in samples with smaller particle sizes. The smallest particle size (< 45 µm) demonstrated the strongest antioxidant activity based on DPPH, ABTS, hydroxyl assay and FRAP. In addition, ramp function graph evaluates the desired particle size for maximum phytochemical composition and antioxidant activity is 44 µm. In conclusion, current results show the importance of particle size reduction of macroalgae samples to increase the effectivity of its biological activity.

scholarly journals Effect of Parinari curatellifolia Peel Flour on the Nutritional, Physical and Antioxidant Properties of Biscuits

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1262
Author(s):  
Shonisani Eugenia Ramashia ◽  
Felicia Matshepho Mamadisa ◽  
Mpho Edward Mashau
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Polyphenolic Compounds ◽  
Total Phenolic ◽  
Crude Fibre ◽  
Yellowness Index ◽  
Antioxidant Power ◽  
Parinari Curatellifolia ◽  
Ferric Reducing Antioxidant Power ◽  
The Impact

This study investigated the impact of Parinari curatellifolia peel flour on the nutritional, physical and antioxidant properties of formulated biscuits. Biscuits enriched with 5%, 10%, 15% and 20% of Parinari (P). curatellifolia peel flour were formulated and characterised. Thermal, physicochemical, polyphenolic compounds and antioxidant properties of flour and biscuits were determined. The incorporation of P. curatellifolia peel flour significantly increased (p < 0.05) thermal properties (onset, peak and conclusion temperatures) of flour. However, enthalpy of gelatinisation, viscosity and pH of flour samples decreased. Nutritional analysis revealed an increase in ash (0.74% to 2.23%) and crude fibre contents (0.39% to 2.95%) along with an increase of P. curatellifolia peel flour levels. Protein content and carbohydrates decreased while moisture content was insignificantly affected by the addition of P. curatellifolia peel flour. The L*, b* values and whiteness index of formulated biscuits decreased while parameter a* value (10.76 to 21.89) and yellowness index (69.84 to 102.71) decreased. Physical properties such as diameter (3.57 mm to 3.97 mm), spread ratio (2.67 to 3.45) and hardness (1188.13 g to 2432.60 g) increased with the inclusion levels of peel flour while weight and thickness decreased. The inclusion of P. curatellifolia improved the polyphenolic compounds and antioxidant activity of biscuits with values of total flavonoids content ranging from 0.028 to 0.104 mg CE/g, total phenolic content increasing from 20.01 mg to 48.51 mg GAE/g, ferric reducing antioxidant power (FRAP) increasing from 108.33 mg to 162.67 mg GAE/g and DPPH (2,2-diphenyl-1-picrylhydrazyl) from 48.70% to 94.72%. These results lead to the recommendation of the utilisation of P. curatellifolia peel flour to enhance the nutritional value, polyphenolic compounds and antioxidant activity of bakery products such as biscuits.

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