Impact of Roasting to Total Phenolic, Flavonoid and Antioxidant Activities in Root, Bark and Leaf of Polyscias fruticosa

Phytochemical Constituents ◽

Radical Scavenging Ability ◽

The Stability

Polyscias fruticosa belongs to Araliaceae family widely cultivated in Vietnam. It is a medical plant highly valued recently owing to its diversified therapeutic functions. It’s exploited in all parts including root, bark and leaf for medicinal purposes. In the herbal tea production, the final step is normally ended with the roasting in order to improve its flavor and aroma. There’s a concern about the detrimental effect of thermal roasting to the stability of phytochemical constituents. In this research, we attempted to evaluate the reduction of total phenolic (mg GAE/100 g), total flavonoid (mg QE/100 g), DPPH radical-scavenging ability (mM TE/100 g), FRAP ferric reducing antioxidant power assay (mM TE/100 g) in root, bark and leaf of Polyscias fruticosa under different roasting conditions. All samples were steamed in vapor for 30 seconds before being dried by convective dryer at 45°C for 6 hours to final moisture content around 12%. Then these samples would be roasted in different conditions (125/15; 130/12, 135/9, 140/6, 145/3, °C/minutes). Our results revealed that roasting at 135/9°C/minutes was appropriate to preserve the most phytochemical constituents.

Antioxidant activity and polyphenol composition of Pistacia terebinthus fruit from Tessala (Western Algeria)

The North African Journal of Food and Nutrition Research - July-December 2021 ◽

10.51745/najfnr.5.11.30-34 ◽

2021 ◽

Vol 5 (11) ◽

pp. 30-34

Author(s):

Nazim Bellifa ◽

Abdelhak Ismail Benhaddou ◽

Houssem Eddine Ferkous ◽

Mohammed Adil Selka ◽

Houari Toumi ◽

...

Keyword(s):

Antioxidant Activity ◽

Antioxidant Activities ◽

Radical Scavenging ◽

Total Phenolic ◽

Antioxidant Power ◽

Scavenging Effect ◽

Coffee Substitute ◽

Pistacia Terebinthus

Background: Consumption of traditional herbal beverages has been generally increased in the last decades, Terebinth coffee, known as ‘‘menengic coffee’’ in Turkish, is one of the most consumed herbal coffees in Turkey, turpentine tree is one of the components of the Mediterranean bush, particularly in Algeria, known as Betoum el Kiffan is largely used as food and in traditional medicine. Aims: In this study, Total phenol, flavonoid content, and antioxidant activity of three extracts of Pistacia trebinthus fruit growing in Algeria was measured using radical scavenging activity tests and metal-related tests including, ferric-reducing antioxidant power (FRAP). The chemical composition profile of the fruits and the coffee brands was identified by thin-layer chromatography, the effects of roasting method of this fruit was rivaled also. Materials and Methods: The total phenolic content of the extracts was determined using the Folin-Ciocalteu method. All extracts of the terebinth fruits and coffee brands displayed a high DPPH scavenging effect. Results: The results of the ferric-reducing antioxidant power show that the reduction capacity is proportional to the increase in the concentration of the samples. All the extracts of the plant exhibit antioxidant activities lower than those of the reference product besides the infusion extract of the P. terebinthus roasted coffee, which is the most active with an optical density of 1.68 nm at a concentration of 400 μg/mL. The chromatography results show that the various extracts of Pistacia terebinthus fruit carry a large number of polyphenols, in particular the carboxylic acids phenols. Conclusions: The plant can be considered as a coffee substitute and opens up promising avenues for the food and pharmaceutical industry in Algeria. Keywords: Antioxidant, Pistacia terebinthus, Coffee, FRAP, polyphenol.

Antioxidant Activity and Total Phenolic Content of 24 Lamiaceae Species Growing in Iran

Natural Product Communications ◽

10.1177/1934578x1000500219 ◽

2010 ◽

Vol 5 (2) ◽

pp. 1934578X1000500 ◽

Cited By ~ 4

Author(s):

Omidreza Firuzi ◽

Katayoun Javidnia ◽

Maryam Gholami ◽

Mohammad Soltani ◽

Ramin Miri

Keyword(s):

Antioxidant Activities ◽

Radical Scavenging ◽

Dry Weight ◽

Natural Antioxidants ◽

Total Phenolic ◽

Dpph Assay ◽

Antioxidant Power ◽

Phenolic Contents ◽

Methanolic Extracts ◽

The antioxidant activities of the methanolic extracts of 9 Salvia species and 15 other Lamiaceae plants growing in Iran were evaluated using ferric reducing antioxidant power (FRAP) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assays. FRAP values ranged form 8.5 to 79.0 μM quercetin equivalents/g dry weight, and IC50 values in the DPPH assay from 115.7 to 1350.2 μg dry weight/mL. Salvia species showed the highest antioxidant activities. S. santolinifolia, S. eremophila and S. palestina, which have not been studied before, were the most active plants. These were more active than the previously studied species from this family, such as S. multicaulis and Marrubium vulgare. S. hydrangea and Gontscharovia popovii also showed high antioxidant activities. FRAP and DPPH assay results showed good correlations with the total phenolic contents of the plants, measured by the Folin-Ciocalteau assay (r2 = 0.925 and 0.799, respectively, p < 0.0001). In conclusion, our study shows that some Lamiaceae plants growing in Iran represent good potential sources of natural antioxidants useful for either prevention or treatment of oxidative stress-related diseases.

Effectiveness of Solvent Extraction on Phytochemicals and Antioxidant Activities from Fresh and Dried Wheatgrass

European Journal of Nutrition & Food Safety ◽

10.9734/ejnfs/2021/v13i230370 ◽

2021 ◽

pp. 1-10

Author(s):

Towkir Ahmed Ove ◽

Anwara Akter Khatun ◽

Said Bin Saifullah ◽

Maruf Ahmed

Keyword(s):

Solvent Extraction ◽

Antioxidant Activities ◽

Radical Scavenging ◽

Total Phenolic ◽

Scavenging Activity ◽

Antioxidant Power ◽

Chlorophyll Contents ◽

Methanolic Extracts ◽

Aims: This study was intended to investigate and quantify the phytochemicals and the antioxidant activities of fresh and powdered wheatgrass. Study Design: The experiment was performed by solvent extraction technique for determining the phytochemicals of wheatgrass samples. Place and Duration of Study: The study was conducted at the Food engineering laboratory in Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh between June 2018 and December 2018. Methodology: Fresh and powdered wheatgrass were used for the experiment. Methanol and ethanol solutions were separately utilized, in an attempt to assume the efficient solvent for extraction. UV-Vis spectrophotometric methods were employed in general throughout the study. Total phenolic contents (TPC), total flavonoid contents (TFC), DPPH scavenging activity, ferric reducing antioxidant power (FRAP) and the total chlorophyll contents of both solvent extracts were analyzed. Results: Phytochemicals and antioxidant activity were found lower in both solvent extracts of powdered wheatgrass than fresh leaves. Phenolic content and Chlorophyll were significantly (P < 0.05) higher in fresh samples (extracts). Due to heating, a significant decrease was observed in the DPPH radical scavenging activity of powdered extracts. Ferric Reducing Antioxidant Power (FRAP) was significantly (P < 0.05) higher in methanolic extracts than in ethanolic extracts. No significant (P > 0.05) difference was observed in total flavonoids contents. Conclusion: These findings endorsed that both solvents demonstrate competitive potentials to extract bioactive compounds from wheatgrass and its derivatives and hence can be chosen specifically according to the components.

Genotype-Related Differences in the Phenolic Compound Profile and Antioxidant Activity of Extracts from Olive (Olea europaea L.) Leaves

Molecules ◽

10.3390/molecules24061130 ◽

2019 ◽

Vol 24 (6) ◽

pp. 1130 ◽

Cited By ~ 11

Author(s):

Hakime Hülya Orak ◽

Magdalena Karamać ◽

Ryszard Amarowicz ◽

Adnan Orak ◽

Kamila Penkacik

Keyword(s):

Phenolic Compound ◽

Antioxidant Activities ◽

Radical Scavenging ◽

Hierarchical Cluster ◽

Primary Component ◽

Total Phenolic ◽

Leaf Extracts ◽

Antioxidant Power ◽

Linoleic Acid Emulsion

The phenolic compound contents and antioxidant activities of the leaf extracts of nine olive genotypes were determined, and the obtained data were analysed using chemometric techniques. In the crude extracts, 12 compounds belonging to the secoiridoids, phenylethanoids, and flavonoids were identified. Oleuropein was the primary component for all genotypes, exhibiting a content of 21.0 to 98.0 mg/g extract. Hydroxytyrosol, verbascoside, luteolin 7-O-glucoside, and luteolin 4′-O-glucoside were also present in noticeable quantities. Genotypes differed to the greatest extent in the content of verbascoside (0.45–21.07 mg/g extract). The content of hydroxytyrosol ranged from 1.33 to 4.03 mg/g extract, and the aforementioned luteolin glucosides were present at 1.58–8.67 mg/g extract. The total phenolic content (TPC), DPPH• and ABTS•+ scavenging activities, ferric reducing antioxidant power (FRAP), and ability to inhibit the oxidation of -carotene-linoleic acid emulsion also varied significantly among genotypes. A hierarchical cluster analysis enabled the division of genotypes into three clusters with similarity above 60% in each group. GGE biplot analysis showed olive genotypes variability with respect to phenolic compound contents and antioxidant activities. Significant correlations among TPC, FRAP, the values of both radical scavenging assays, and the content of oleuropein were found. The contents of 7-O-glucoside and 4′-O-glucoside correlated with TPC, TEAC, FRAP, and the results of the emulsion oxidation assay.

Evaluation of Free Radical Scavenging Activity and Reducing Power of Careya arborea Roxb.

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.886.86 ◽

2019 ◽

Vol 886 ◽

pp. 86-91

Author(s):

Wanvisa Ninlaor ◽

Thaksaorn Thongom ◽

Chawapon Phoomphong ◽

Warachate Khobjai

Keyword(s):

Antioxidant Activities ◽

Radical Scavenging ◽

Reducing Power ◽

Chloroform Extract ◽

Total Phenolic ◽

Antioxidant Compounds ◽

Antioxidant Power ◽

Active Substances

Antioxidant plays an important role in inhibiting and scavenging radicals, thus providing protection for human against infection and degenerative diseases. The aim of this study was to evaluate the effect of the solvent on the extraction of the antioxidant compounds from Careya arborea (CA) Roxb. The leaves of CA were extracted by using water, ethanol, methanol, and chloroform. The total phenolic content of the extracts was determined by the Folin-Ciocalteu reagent and their antioxidant activity was measured using 2, 2-diphenyl-1 picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) methods. The antioxidant activities of the extracts for DPPH and FRAP were in the order: water > methanol > ethanol > chloroform extract. According to the results, water is the most suitable solvent for extraction of active substances with antioxidant activities.

Antimicrobial and Antioxidant Activities of a Malaysian Medicinal Plant Anisophyllea Disticha (Jack) Baill. And Quantification of Its Phenolic Constituents

Bangladesh Journal of Botany ◽

10.3329/bjb.v50i3.55830 ◽

2021 ◽

Vol 50 (3) ◽

pp. 515-521

Author(s):

Nurul Ashikin Abdul Bari ◽

Sahena Ferdosh ◽

Md Zaidul Islam Sarker

Keyword(s):

Antioxidant Activities ◽

Radical Scavenging ◽

Total Phenolic ◽

High Positive Correlation ◽

Antioxidant Power ◽

Growth Inhibitory ◽

Growth Inhibitory Activity ◽

Phenolic Constituents ◽

The ethanolic extracts of different parts of Anisophyllea disticha were tested for antimicrobial capability using disc diffusion assay. The result revealed positive growth inhibitory activity, but was considered weak for all extracts against Gram positive bacteria. Leaf extract displayed the highest zone of inhibition with values of 10.67 ± 0.58 and 8.67 ± 0.58 mm against Staphylococcus epidermidis and S. aureus, respectively. On the other hand, stem showed the highest amount of total phenolic content (TPC) (27.73 ± 4.10 mg GAE/g extract) and similar trend was also observed in antioxidant potential in terms of DPPH radical scavenging activity (66.20 ± 11.74%) and ferric reducing antioxidant power assay (FRAP) (203.63 ± 16.03 mg Fe(II)/g extract). High positive correlation was found between TPC and antioxidant activities, suggesting that phenolic compounds contribute to the antioxidant power of plant extracts. HPLC analysis identified and quantified gallic acid, p-coumaric, ferulic acid and quercetin in the extracts. Bangladesh J. Bot. 50(3): 515-521, 2021 (September)

Degradation of Phytochemical and Antioxidant Capacity of Noni (Morinda Citrifolia L.) Pulp Tea during Drying and Roasting Treatment

Journal of Pharmaceutical Research International ◽

10.9734/jpri/2020/v32i230401 ◽

2020 ◽

pp. 34-37

Author(s):

Minh Phuoc Nguyen

Keyword(s):

Antioxidant Capacity ◽

Radical Scavenging ◽

Good Health ◽

Morinda Citrifolia ◽

Total Phenolic ◽

Antioxidant Power ◽

Tea Production ◽

Radical Scavenging Ability ◽

Dpph Radical Scavenging

Noni (Morinda citrifolia L.) fruit is highly evaluated as an important herb with a good source of natural antioxidant against various ailments as well as maintain overall good health. It’s normally disposed due to unpleasant aroma from the ripened fruit. There is limited literature mentioned to the decomposition of this valuable fruit during thermal processing. Hence this reseach aimed to evaluate the possible degradation of total phenolic (mg GAE/100 g), total flavonoid (mg QE/100 g), DPPH radical-scavenging ability (mM TE/100 g), FRAP ferric reducing antioxidant power assay (mM TE/100 g) in raw, dried and roasted noni pulp tea. The highest contents of functional constituents and antioxidant capacity were noticed in the raw sample; meanwhile decreased dramatically in the roasted one. However, degradation of noni flavonol glycosides during roasting could produce aglycone metabolites, which in turn, may lead to increased bioavailability. Owing to degradation of phytochemical and antioxidant ability by harsh thermal treatment, it’s necessary to be careful in drying and roasting to limit detrimental effect in herbal noni tea production.

Grape Canes from Typical Cultivars of Campania (Southern Italy) as a Source of High-Value Bioactive Compounds: Phenolic Profile, Antioxidant and Antimicrobial Activities

Molecules ◽

10.3390/molecules26092746 ◽

2021 ◽

Vol 26 (9) ◽

pp. 2746

Author(s):

Giuseppe Squillaci ◽

Carla Zannella ◽

Virginia Carbone ◽

Paola Minasi ◽

Veronica Folliero ◽

...

Keyword(s):

Southern Italy ◽

Antiviral Agents ◽

Radical Scavenging ◽

Antimicrobial Activities ◽

Total Phenolic ◽

Antioxidant Power ◽

Herpes Simplex Viruses ◽

Antioxidant And Antimicrobial Activities

The purpose of the current study was to determine the phenolic composition, antioxidant, and antimicrobial activities in grape cane extracts from typical cultivars of Southern Italy. Aqueous extracts at different pHs (1–13) were prepared from “Aglianico”, “Fiano”, and “Greco” grape canes. The results demonstrated that an alkaline pH (13.00) produced the best polyphenol-rich extracts, as the total phenolic content was more than double when compared to the respective extracts prepared at pH 1.00. “Greco” grape canes gave the highest quantity of phenolic compounds at each pH, ranging from 42.7 ± 0.4 to 104.3 ± 3.0 mg Gallic Acid Equivalents (GAE)/g Dry Extract (DE) from pH 1.00 to 13.00. The Radical Scavenging Activity (RSA) and the Ferric Reducing Antioxidant Power (FRAP) were measured. The highest antioxidant activity was showed by “Greco” extract at pH 7.00. Seventy-five compounds were identified in the extracts by HPLC-MS with six of them described for the first time in grape canes. Procyanidins were highly abundant in extracts at pH 7.00, whereas stilbenoids were the most represented compounds at pH 13.00. Very strong antiviral activity against herpes simplex viruses was recorded for the extracts at pH 7.00 and 13.00 that were active in the early stages of infection by acting directly against the viral particles. The overall results suggest that grape canes, currently underutilized, can be usefully valorised by providing active extracts to use as antioxidant and antiviral agents.

Phenolic Profiles and Antioxidant Activities of 30 Tea Infusions from Green, Black, Oolong, White, Yellow and Dark Teas

Antioxidants ◽

10.3390/antiox8070215 ◽

2019 ◽

Vol 8 (7) ◽

pp. 215 ◽

Cited By ~ 18

Author(s):

Cai-Ning Zhao ◽

Guo-Yi Tang ◽

Shi-Yu Cao ◽

Xiao-Yu Xu ◽

Ren-You Gan ◽

...

Keyword(s):

Antioxidant Activities ◽

Dry Weight ◽

Trolox Equivalent Antioxidant Capacity ◽

Total Phenolic ◽

Antioxidant Power ◽

Phenolic Contents ◽

Tea Infusions ◽

Phenolic Profiles ◽

Trolox Equivalent ◽

Tea is among the most consumed drink worldwide, and its strong antioxidant activity is considered as the main contributor to several health benefits, such as cardiovascular protection and anticancer effect. In this study, the antioxidant activities of 30 tea infusions, which were obtained by the mimic of drinking tea of the public, from green, black, oolong, white, yellow and dark teas, were evaluated using ferric-reducing antioxidant power (FRAP) and Trolox equivalent antioxidant capacity (TEAC) assays, ranging from 504.80 ± 17.44 to 4647.47 ± 57.87 µmol Fe2+/g dry weight (DW) and 166.29 ± 24.48 to 2532.41 ± 50.18 µmol Trolox/g DW, respectively. Moreover, their total phenolic contents (TPC) were detected by Folin-Ciocalteu assay and were in the range of 24.77 ± 2.02 to 252.65 ± 4.74 mg gallic acid equivalent (GAE)/g DW. Generally, Dianqing Tea, Lushan Yunwu Tea, and Xihu Longjing Tea showed the strongest antioxidant activities among 30 teas. Furthermore, the phenolic compounds in tea infusions were identified and quantified, with catechins most commonly detected, especially in green tea infusions, which were main contributors to their antioxidant activities. Besides tea polyphenols, considerable content of caffeine also presented in 30 tea infusions.

Comparative Study on Phytochemical Profile and Antioxidant Activity of an Epiphyte, Viscum album L. (White Berry Mistletoe), Derived from Different Host Trees

Plants ◽

10.3390/plants10061191 ◽

2021 ◽

Vol 10 (6) ◽

pp. 1191

Author(s):

Mahak Majeed ◽

Tanveer Bilal Pirzadah ◽

Manzoor Ahmad Mir ◽

Khalid Rehman Hakeem ◽

Hesham F. Alharby ◽

...

Keyword(s):

Antioxidant Activities ◽

Pearson Correlation ◽

Juglans Regia ◽

Radical Scavenging ◽

Reducing Power ◽

Viscum Album ◽

Total Phenol Content ◽

Leaf Extracts ◽

Antioxidant Power ◽

The study aimed at evaluating the antioxidant profile of a medicinal epiphyte Viscum album L. harvested from three tree species, namely, Populus ciliata L, Ulmus villosa L., and Juglans regia L. The crude extracts were obtained with ethanol, methanol, and water and were evaluated for the total phenol content (TPC), total flavonoid content (TFC), and antioxidant activities using total reducing power (TRP), ferric reducing antioxidant power (FRAP), 1, 1-diphenyl 1-2-picryl-hydrazyl (DPPH), superoxide radical scavenging (SOR), and hydroxyl radical scavenging (•OH) assays. Our results showed that crude leaf extracts of plants harvested from the host Juglans regia L. exhibited higher yields of phytochemical constituents and noticeable antioxidative properties. The ethanolic leaf samples reported the highest phenols (13.46 ± 0.87 mg/g), flavonoids (2.38 ± 0.04 mg/g), FRAP (500.63 ± 12.58 μM Fe II/g DW), and DPPH (87.26% ± 0.30 mg/mL). Moreover, the highest values for TRP (4.24 ± 0.26 μg/mL), SOR (89.79% ± 0.73 mg/mL), and OH (67.16% ± 1.15 mg/mL) were obtained from aqueous leaf extracts. Further, Pearson correlation was used for quantifying the relationship between TPC, TFC, and antioxidant (FRAP, DPPH, SOR, OH) activities in Viscum album L. compared to their hosts. It was revealed that the epiphyte showed variation with the type of host plant and extracting solvent.