scholarly journals Comparative Evaluation of Chemical Composition, Phenolic Compounds, and Antioxidant and Antimicrobial Activities of Tropical Black Bolete Mushroom Using Different Preservation Methods

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 781
Author(s):  
Jaturong Kumla ◽  
Nakarin Suwannarach ◽  
Keerati Tanruean ◽  
Saisamorn Lumyong
Keyword(s):  
Chemical Composition ◽  
Phenolic Compounds ◽  
Natural Antioxidants ◽  
Antimicrobial Activities ◽  
Fresh Sample ◽  
Antioxidant Power ◽  
Preservation Methods ◽  
Ferric Reducing Antioxidant Power ◽  
Nutritional Benefits ◽  
Antioxidant And Antimicrobial Activities

Tropical black bolete, Phlebopus portentosus, provides various nutritional benefits and natural antioxidants to humans. In this study, the chemical composition, phenolic compounds, and antioxidant and antimicrobial activities of fresh mushroom samples and samples stored for a period of one year using different preservation methods (drying, brining, and frozen) were investigated. The results indicated that the brining method significantly reduced the protein and fat contents of the mushrooms. The polyphenol and flavonoid contents of the frozen sample were not significantly different from that of the fresh sample. The results revealed that an inhibition value of 50% (IC50) for the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay of the extract of the dried and frozen samples was not statistically different from that of the fresh sample. The IC50 value of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay and ferric reducing antioxidant power (FRAP) value in the extract of the frozen sample were not found to be significantly different from those of the fresh sample. Furthermore, the lowest degree of antioxidant activity was found in the extract of the brined sample. Additionally, the antimicrobial activities of the extracts of the fresh and frozen samples were not significantly different and both extracts could have inhibited the growth of all tested Gram-positive bacteria and Pseudomonas aeruginosa.

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

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2746
Author(s):  
Giuseppe Squillaci ◽  
Carla Zannella ◽  
Virginia Carbone ◽  
Paola Minasi ◽  
Veronica Folliero ◽  
...  
Keyword(s):  
Southern Italy ◽  
Radical Scavenging Activity ◽  
Antiviral Agents ◽  
Radical Scavenging ◽  
Antimicrobial Activities ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Herpes Simplex Viruses ◽  
Ferric Reducing Antioxidant Power ◽  
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.

scholarly journals Experimental approaches targeting the biochemical and antioxidant potential of Synsepalum dulcificum dried fruits

2021 ◽  
Vol 26 (1) ◽  
pp. 2230-2235
Author(s):  
GABRIELA POPA ◽  
RADU TOMA ◽  
JEAN-FRANÇOIS BOÉ
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Dry Matter ◽  
Natural Antioxidants ◽  
Fruit Pulp ◽  
Antioxidant Power ◽  
Dried Fruits ◽  
Dried Fruit ◽  
Ferric Reducing Antioxidant Power ◽  
Pharmacologically Active

This study aimed to investigate the biochemical content and antioxidant activity of methanol extracts prepared from Synsepalum dulcificum dried fruits. The results obtained by phytochemical screening of the extracts revealed the presence of some pharmacologically active chemical compounds such as: alkaloids, flavonoids, phenolic compounds and tannins. Quantitative analysis showed that the seeds had phenols in greater amounts (157.88 ± 2.09 mg GAE / g dry matter) than dried fruit pulp (54.09 ± 2.24 mg GAE / g dry matter). Contrariwise, flavonoid content was found to be low in seed (0.013 ± 0.02 mg EQ / g) and high in fruit pulp (0.13 ± 0.05 mg EQ / g). Correlated with the high amount of total phenol, in the seed extracts was found a good antioxidant activity – measured by both DPPH and ferric reducing antioxidant power (FRAP) assays. This antioxidant capacity may be also correlated with the amount of alkaloids, flavonoids, tannins and phenolic compounds, and as well as with their synergistic interactions. Synsepalum dulcificum fruits can be used as a healthy source of additives for the food industry or as natural antioxidants for the pharmaceutical industry.

scholarly journals Chemical Composition, Antioxidant, and Antimicrobial Activities of LichenUmbilicaria cylindrica(L.) Delise (Umbilicariaceae)

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Nedeljko T. Manojlovic ◽  
Perica J. Vasiljevic ◽  
Pavle Z. Maskovic ◽  
Marina Juskovic ◽  
Gordana Bogdanovic-Dusanovic
Keyword(s):  
Lipid Peroxidation ◽  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Chemical Composition ◽  
Usnic Acid ◽  
Natural Antioxidants ◽  
Antimicrobial Activities ◽  
Phytochemical Analysis ◽  
Chelating Activity ◽  
Antioxidant And Antimicrobial Activities

The phytochemical analysis of methanol and chloroform extracts ofUmbilicaria cylindricawas determined by HPLC-UV method. The predominant phenolic compound in both extracts was depsidone, salazinic acid (1). Besides salazinic acid, the tested extracts ofU. cylindricacontain norstictic acid (2), methyl-β-orcinol carboxylate (3), ethyl haematommate (4), atranorin (5), and usnic acid (6), in different amounts and relations. The lichen extracts showed comparable and strong antioxidant activity, exhibited higher DPPH and hydroxyl radical scavengings, chelating activity, and inhibitory activity towards lipid peroxidation. The lichen extracts demonstrated important antimicrobial activity against eight strains with MIC values from 15.62 to 62.50 μg/mL. This is the first report of the detail chemical composition and antioxidant activity of the lichenUmbilicaria cylindrica, and the results suggest that this lichen can be used as a new source of the natural antioxidants and the substances with antimicrobial features.

scholarly journals Chemical Composition of Essential Oil, Phenolic Compounds Content, and Antioxidant Activity of Cistus monspeliensis from Northern Morocco

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Sara Haida ◽  
Kaltoum Bakkouche ◽  
Abdelaziz Ramadane Kribii ◽  
Abderahim Kribii
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Condensed Tannins ◽  
Natural Antioxidants ◽  
Health It ◽  
Total Polyphenols ◽  
Antioxidant Power ◽  
Liquid Liquid Extraction ◽  
Ferric Reducing Antioxidant Power

Currently, oxidative stress is one of the major problems that threatens human health. It is at the root of many diseases such as cancer. Despite the enormous efforts provided to combat this scourge, oxidative stress is still relevant and hence comes the need for research of new remedies especially from natural origin. For this purpose, the study of the antioxidant activity of extracts of Cistus monspeliensis from Morocco is a principal research objective. The phenolic extracts were obtained by maceration of the plant in a water/acetone mixture and then separated by liquid/liquid extraction with solvents of increasing polarity. The first phytochemical tests carried out on these extracts showed the existence of different families of phenolic compounds, such as flavonoids, tannins, and others. Assays for total polyphenols, flavonoids, hydrolysable, and condensed tannins were carried out by known colorimetric methods. The results of these assays have shown that the studied extracts are rich in phenolic compounds present in the plant in the form of flavonoids (69.81 ± 0.22 mg EQ/g DM), hydrolysable tannins (61.86 ± 0.89 mg ETA/g DM), and condensed tannins (70.05 ± 1.61 mg EC/g DM). The evaluation of the antioxidant activity is carried out by two different methods: the DPPH test (2,2-DiPhenyl-1-Picryl-Hydrazyl) and the FRAP test (Ferric Reducing Antioxidant Power). The results obtained show that the extracts of Cistus monspeliensis are active and have interesting antioxidant powers. In particular, the water/acetone (WAE) (IC50 = 0.079 mg/mL) and butanolic (BUE) (IC0.5 = 0.099 mg/mL) extracts are the most active with values comparable to that of ascorbic acid. The interesting results obtained in this study clearly show that Cistus monspeliensis originating from Morocco can be considered as a source of natural antioxidants. Therefore, the extracts of this plant deserve to be tested in the medicinal field, against cancer and cardiovascular diseases, and in food field as an additive and preservative.

scholarly journals Antioxidant Capacity and Phenolic and Sugar Profiles of Date Fruits Extracts from Six Different Algerian Cultivars as Influenced by Ripening Stages and Extraction Systems

Foods ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 503
Author(s):  
Malika Tassoult ◽  
Djamel Edine Kati ◽  
María África Fernández-Prior ◽  
Alejandra Bermúdez-Oria ◽  
Juan Fernandez-Bolanos ◽  
...  
Keyword(s):  
Sugar Content ◽  
Antioxidant Properties ◽  
Dry Weight ◽  
Natural Antioxidants ◽  
Antioxidant Power ◽  
Fruit Extracts ◽  
Ripening Stages ◽  
Date Fruit ◽  
Ferric Reducing Antioxidant Power ◽  
First Time

The study investigated the phenols, sugar and the antioxidant capacities of date fruit extracts obtained by organic solvents and by hydrothermal treatment from six different Algerian cultivars at two ripening stages for the first time. The analyzed cultivars exhibited potent antioxidant properties (ferric reducing antioxidant power (FRAP), 1,1-Diphenyl-2-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) scavenging capacities) and different phenols regardless of the solvents and the maturity stages. About 18 phenols were identified and quantified, mainly in the hydrothermal extracts. The earlier stages were characterized by high amounts of o-coumaric acid, cinnamic acid and luteolin, with a noticeable absence of quercetin. The tamr stage presented the highest sugar content (78.15–86.85 mg/100 mg dry weight (DW)) with an abundance of glucose. Galactose was present only in some cultivars from the kimri stage (tamjouhert). Uronic acids were mostly detected at the tamr stage (4.02–8.82 mg gallic acid equivalent/100 mg dried weight). The obtained results highlight the potential of using date fruit extracts as natural antioxidants, especially at industrial scales that tend use hydrothermal extraction.

scholarly journals Comparative Evaluation of Argania spinosa and Olea europaea Leaf Phenolic Compounds and their Antioxidant Activity

Botanica ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 76-87
Author(s):  
Aziza Lfitat ◽  
Hind Zejli ◽  
Abdelkamel Bousselham ◽  
Yassine El Atki ◽  
Badiaa Lyoussi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Olive Leaves ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power ◽  
Total Flavonoids Content

AbstractWe conducted this study to determine and compare the content of phenolic compounds and flavonoids in the argan and olive leaves as well as their antioxidant capacity in aqueous, methanolic, and ethyl acetate extracted fractions. In vitro antioxidant activity was evaluated in comparison with synthetic antioxidants by assessing DPPH• radical scavenging capacity, ferric reducing antioxidant power, scavenging ability by inhibiting the β-carotene/linoleic acid emulsion oxidation, and by the ABTS radical scavenging activity assay. Total phenolic content in argan samples ranged from 221.69 ± 2.07 to 1.32 ± 0.01 mg GAE/g DW and in olive samples from 144.61 ± 0.82 to 1.21 ± 0.02 mg GAE/g DW. Total flavonoids content in argan samples varied from 267.37 ± 1.12 to 25.48 ± 0.02 mg QE/g DW, while in olives from 96.06 ± 0.78 to 10.63 ± 0.05 mg QE/g DW. In vitro antioxidant studies strongly confirmed the antioxidant potency of argan and olive leaves and their richness in secondary metabolites that are effective in free radicals scavenging and metal chelating capacities, indicating their antioxidant power.

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