scholarly journals Study of antioxidant capacity of different parts of two south Algerian eggplant cultivars

2015 ◽  
Vol 4 (2) ◽  
pp. 164 ◽  
Author(s):  
C Boubekri ◽  
A Rebiai ◽  
T Lanez
Keyword(s):  
Antioxidant Capacity ◽  
Different Parts

scholarly journals Phytochemical, Antioxidant and Antimicrobial studies of Lannea egregia Engl. & K. Krause (Anacardiaceae) extracts and chromatographic fractions

2020 ◽  
Vol 19 (1) ◽  
pp. 348-363
Author(s):  
Philip A. Idowu ◽  
Loveth C. Ekemezie ◽  
Charles O. Olaiya
Keyword(s):  
Antibacterial Activity ◽  
Ethyl Acetate ◽  
Antioxidant Capacity ◽  
Reducing Power ◽  
Stem Bark ◽  
Diffusion Method ◽  
Total Phenolic ◽  
Phytochemical Screening ◽  
Crude Extracts ◽  
Different Parts

Screening ‘new’ medicinal plants of traditional importance for bioactive components is a sure way of discovering novel therapeutic agents to treat diseases. This study, therefore investigated the presence of phytochemical, antioxidant and antibacterial components of the extracts of Lannea egregia. Phytochemical screening was done by standard methods. Antibacterial activity of the extracts of Lannea egregia was determined by agar well diffusion method while the minimum inhibitory concentration (MIC) was determined by agar dilution method. The antioxidant capacity of the crude extracts was determined through the evaluation of total flavonoid content, total phenolic content, ferric reducing power, total antioxidant capacity and 2,2-diphenyl-1-picryhydrazyl. The phytochemical screening of the different parts of this plant revealed the presence of tannins, saponins, alkaloids, flavonoids, steroids, terpenoids, emodins, phlobatannins, anthocyanins, coumarins and phenolics. Phlobatannins was observed to be absent in the stem bark. The crude extracts obtained from the leaves, stem bark and roots of this plant exhibited good antibacterial activity against typed strains of Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa and Escherichia coli. The diameter of the zone of inhibition ranged from 9.0 to 26.0 mm at 100 mg/mL for all the plant parts. The ethyl acetate leaf extract of this plant possessed the highest antibacterial activity with MIC and MBC values of the range of (3.125 to ˃50 mg/mL) and (12.5 to ˃50 mg/mL) respectively. The zone inhibition of the chromatographic fractions of both plants ranged 15-23 mm. Antioxidant study of the extracts of the leaf of L. egregia revealed that the ethyl acetate and methanol extracts have good antioxidant potentials comparable to that of ascorbic acid control. This study has revealed that the extracts from different parts of L. egregia possess good antibacterial and antioxidant activities which could be a function of the various phytochemicals detected in the plant. Keywords: Lannea egregia, Phytochemical, Antibacterial, Antioxidant, Column chromatography.

Antioxidant capacity and antibacterial activity of different parts of mangosteen (Garcinia mangostanaLinn.) extracts

Fruits ◽  
2013 ◽  
Vol 68 (6) ◽  
pp. 483-489 ◽  
Author(s):  
Yin Sze Lim ◽  
Stefanie Sze Hui Lee ◽  
Boon Chin Tan
Keyword(s):  
Antibacterial Activity ◽  
Antioxidant Capacity ◽  
Different Parts

scholarly journals Effect of Drying on the Antioxidant Capacity and Concentration of Phenolic Compounds in Different Parts of the Erythrina americana Tree

BioResources ◽  
2016 ◽  
Vol 11 (4) ◽  
Author(s):  
Aurea Bernardino-Nicanor ◽  
José Luis Montañez-Soto ◽  
María de los Ángeles Vivar-Vera ◽  
José Mayolo Juárez-Goiz ◽  
Gerardo Acosta-García ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Different Parts

scholarly journals Bioactive Compounds, Antioxidant Capacity, and Fatty Acids in Different Parts of Four Unexplored Fruits

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Adriela Albino Rydlewski ◽  
Damila Rodrigues de Morais ◽  
Eliza Mariane Rotta ◽  
Thiago Claus ◽  
Julianna Matias Vagula ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
High Performance ◽  
Total Phenolic ◽  
Omega 3 ◽  
Total Anthocyanins ◽  
Total Variability ◽  
Different Parts

Total phenolic content (TPC), total flavonoids (TF), total anthocyanins (TA), and antioxidant capacity of different parts of four unexplored fruits from Brazil (Syzygium cuminiLam,Solanum nigrumLinn,Inga edulisMart, andHovenia dulcisThunb) were determined; the bioactive compounds and fatty acids were quantified and identified by high-performance liquid chromatography and gas chromatography, respectively.S. cuminipeels contained the most TA (63.31 mg/100 g), whilstH. dulcispulp and peels had the highest TPC (518.18 mg GAE/100 g) and TF (76.54 mg EQ/g). Phenolic compounds responsible for antioxidant capacity of fruits were gallic acid, ellagic acid, kaempferol, and epicatechin.H. dulcisseed showed the highest level of the essential fatty acid omega-3 (3985.95 mg/100 g). PCA showed that PC1 and PC2 explained 90.43% of the total variability of the antioxidant data. Most of the seeds showed omega-3, omega-6, and omega-9 fatty acids at significant concentrations, with two PCs explaining 93.80% of the total variance of the fatty acid contents.

scholarly journals Total Phenolic Content and Antioxidant Capacity of Different Parts of Cucumber (Cucumis sativus L.)

2018 ◽  
Vol 22 (2) ◽  
pp. 13-20
Author(s):  
Alkasim Kabiru Yunusa ◽  
Munir Abba Dandago ◽  
Sa’adatu Mukhtar Ibrahim ◽  
Nura Abdullahi ◽  
Abdulrashid Rilwan ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Pearson Correlation ◽  
Health Benefit ◽  
Aluminium Chloride ◽  
Total Phenolic ◽  
Frap Assay ◽  
Cucumis Sativus L ◽  
Antioxidant Power ◽  
Peel Extract ◽  
Different Parts

Abstract The aims of this research were to estimate the polyphenol content and antioxidant capacity from different parts of cucumber. The antioxidant activity was investigated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP), total flavonoid and phenolic contents were estimated using aluminium chloride and Folin-Ciocalteau reagents assays, respectively. Our finding showed that the ethanolic peel extract contained the highest phenolic (23.08 mg GAE/g) and flavonoids (14.02 mg QE/g). Also, ethanolic peel extract demonstrated significantly (p<0.05) higher FRAP value. Pearson correlation revealed that there were positive correlations (p<0.01) between TPC and TFC with FRAP assay. These findings suggest that consumption of cucumber with peel may provide optimum health benefit than its peeled counterpart.

Solanum diploconos fruits: profile of bioactive compounds and in vitro antioxidant capacity of different parts of the fruit

2016 ◽  
Vol 7 (5) ◽  
pp. 2249-2257 ◽  
Author(s):  
Alessandra Braga Ribeiro ◽  
Renan Campos Chisté ◽  
José L. F. C. Lima ◽  
Eduarda Fernandes
Keyword(s):  
Solanum Tuberosum ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Food Crops ◽  
Important Food ◽  
Different Parts

Solanum diploconosis an unexploited Brazilian native fruit that belongs to the same genus of important food crops, such as tomato (Solanum lycorpersicum) and potato (Solanum tuberosum).

Trans-resveratrol supplement lowers lipid peroxidation responses of exercise in male Wistar rats

2020 ◽  
pp. 1-6 ◽  
Author(s):  
Masoud Nasiri ◽  
Saja Ahmadizad ◽  
Mehdi Hedayati ◽  
Tayebe Zarekar ◽  
Mehdi Seydyousefi ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Wistar Rats ◽  
Enzymatic Antioxidants ◽  
Acute Response ◽  
Total Antioxidant ◽  
Male Wistar Rats ◽  
Exercise Induced ◽  
And Control

Abstract. Physical exercise increases free radicals production; antioxidant supplementation may improve the muscle fiber’s ability to scavenge ROS and protect muscles against exercise-induced oxidative damage. This study was designed to examine the effects of all-trans resveratrol supplementation as an antioxidant to mediate anti-oxidation and lipid per-oxidation responses to exercise in male Wistar rats. Sixty-four male Wistar rats were randomly divided into four equal number (n = 16) including training + supplement (TS), training (T), supplement (S) and control (C) group. The rats in TS and S groups received a dose of 10 mg/kg resveratrol per day via gavage. The training groups ran on a rodent treadmill 5 times per week at the speed of 10 m/min for 10 min; the speed gradually increased to 30 m/min for 60 minutes at the end of 12th week. The acute phase of exercise protocol included a speed of 25 m/min set to an inclination of 10° to the exhaustion point. Superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT) activity, non-enzymatic antioxidants bilirubin, uric acid, lipid peroxidation levels (MDA) and the total antioxidant capacity (TAC) were measured after the exercise termination. The data were analyzed by using one-way ANOVA. The result showed that endurance training caused a significant increase in MDA level [4.5 ± 0.75 (C group) vs. 5.9 ± 0.41 nmol/l (T group)] whereas it decreased the total antioxidant capacity [8.5 ± 1.35 (C group) vs. 7.1 ± 0.55 mmol/l (T group)] (p = 0.001). In addition, GPx and CAT decreased but not significantly (p > 0.05). The training and t-resveratrol supplementation had no significant effect on the acute response of all variables except MDA [4.3 ± 1.4 (C group) vs. 4.0 ± 0.90 nmol/l (TS group)] (p = 0.001) and TAC [8.5 ± 0.90 (C group) vs. 6.6 ± 0.80 mmol/l (TS group)] (p = 0.004). It was concluded that resveratrol supplementation may prevent exercise-induced oxidative stress by preventing lipid peroxidation.

The Role of Polyphenols in the Modulation of Plasma Non-Enzymatic Antioxidant Capacity (NEAC)

2012 ◽  
Vol 82 (3) ◽  
pp. 228-232 ◽  
Author(s):  
Mauro Serafini ◽  
Giuseppa Morabito
Keyword(s):  
Antioxidant Capacity ◽  
Dietary Intervention ◽  
Ex Vivo ◽  
The Body ◽  
Dietary Polyphenols ◽  
Enzymatic Antioxidant ◽  
Endogenous Antioxidant

Dietary polyphenols have been shown to scavenge free radicals, modulating cellular redox transcription factors in different in vitro and ex vivo models. Dietary intervention studies have shown that consumption of plant foods modulates plasma Non-Enzymatic Antioxidant Capacity (NEAC), a biomarker of the endogenous antioxidant network, in human subjects. However, the identification of the molecules responsible for this effect are yet to be obtained and evidences of an antioxidant in vivo action of polyphenols are conflicting. There is a clear discrepancy between polyphenols (PP) concentration in body fluids and the extent of increase of plasma NEAC. The low degree of absorption and the extensive metabolism of PP within the body have raised questions about their contribution to the endogenous antioxidant network. This work will discuss the role of polyphenols from galenic preparation, food extracts, and selected dietary sources as modulators of plasma NEAC in humans.

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