scholarly journals Bioactive compounds, antioxidant and antimicrobial activities of extracts from different plant parts of two Ziziphus Mill. species

PLoS ONE ◽  
2020 ◽  
Vol 15 (5) ◽  
pp. e0232599 ◽  
Author(s):  
Yassine Yahia ◽  
Mohamed Ali Benabderrahim ◽  
Nizar Tlili ◽  
Mohamed Bagues ◽  
Kameleddine Nagaz
Keyword(s):  
Bioactive Compounds ◽  
Antimicrobial Activities ◽  
Plant Parts ◽  
Antioxidant And Antimicrobial Activities

scholarly journals Antioxidant and Antimicrobial Activities, and Phenolic Compounds of Selected Inula species from Turkey

2013 ◽  
Vol 8 (4) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Alper Gökbulut ◽  
Onural Özhana ◽  
Basri Satılmiş ◽  
Kadir Batçioğlu ◽  
Selami Günal ◽  
...  
Keyword(s):  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Antimicrobial Activities ◽  
Total Phenolic ◽  
Methanol Extracts ◽  
Plant Parts ◽  
Antimicrobial Potential ◽  
Phenolic Components ◽  
Antioxidant And Antimicrobial Activities

Three Inula species, I. viscosa, I. helenium ssp. turcoracemosa and I. montbretiana, collected from different locations of Anatolia were investigated for their antioxidant and antimicrobial potential, and their total phenolic content and phenolic composition. Antioxidant activities of various extracts of the plant parts were measured using DPPH radical scavenging and ABTS assays. Antimicrobial potential of methanol extracts of the plant parts was determined by the agar dilution method against Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, Candida albicans and Candida tropicalis. All the extracts were more active against Gram-positive bacteria and yeasts than Gram-negative bacteria. The extracts exhibited antioxidant and antimicrobial activities in different concentrations. Total phenolic concentration of the extracts was estimated with Folin-Ciocalteu reagent using gallic acid as standard. The total phenolic content varied widely in different parts of the three tested Inula species, ranging from 21.1 ± 0.8 to 190.9 ± 6.1 mg GAE/g extract. Phenolic components, such as chlorogenic acid, caffeic acid, rutin, myricetin, quercetin, luteolin and kaempferol were quantified by HPLC-DAD in the methanol extracts of the Inula species. It was obvious that the antioxidant and antimicrobial properties of the plants were due to the phenolics.

scholarly journals Bioactive compounds, antioxidant and antimicrobial activities of Arum maculatum leaves extracts as affected by various solvents and extraction methods

2019 ◽  
Vol 7 (2) ◽  
pp. 465-475 ◽  
Author(s):  
Reza Farahmandfar ◽  
Reza Esmaeilzadeh Kenari ◽  
Maryam Asnaashari ◽  
Dina Shahrampour ◽  
Tahmineh Bakhshandeh
Keyword(s):  
Bioactive Compounds ◽  
Extraction Methods ◽  
Antimicrobial Activities ◽  
Arum Maculatum ◽  
Antioxidant And Antimicrobial Activities

scholarly journals Optimization of the Microwave-Assisted Extraction Process of Bioactive Compounds from Annatto Seeds (Bixa orellana L.)

Antioxidants ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 37 ◽  
Author(s):  
Julian Q. Quiroz ◽  
Angélica C. Torres ◽  
Luisa M. Ramirez ◽  
Mariluz S. Garcia ◽  
Gelmy C. Gomez ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Microwave Treatment ◽  
Extraction Process ◽  
Antimicrobial Activities ◽  
Microwave Assisted Extraction ◽  
Solvent Concentration ◽  
Polyphenol Compounds ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Antioxidant And Antimicrobial Activities

This study deals with the extraction, optimization, and evaluation of the antioxidant and antimicrobial activities of bioactive compounds obtained from the seeds of annatto using microwave-assisted extraction as compared to leaching. Annatto seeds were subjected to a microwave treatment of 2450 MHz and power of 700 watts using a response surface design involving four factors: pH (4–11), solvent concentration (ethanol) (50–96 %), solvent-to-seed ratio (2–10), and microwave exposure time (0–5 min). The contents of polyphenol compounds and bixin were taken as response variables. Subsequently, the antioxidant and antimicrobial activities were assessed at the optimal processing conditions predicted by the experimental design. Microwaves, solvent concentration, and the solvent-to-seed ratio showed a statistically significant effect for the extraction of polyphenol compounds and bixin. Thus, microwaves accelerated the extraction of those compounds and the slight increase in temperature caused some degradation of the polyphenol compounds. The microwave-assisted extraction increased the contents of polyphenols and bixin along with their antioxidant activity as compared to leaching extraction. However, this technique does not significantly improve the antimicrobial activity against Bacillus cereus and Staphylococcus aureus.

scholarly journals Evaluation of Vitamin Contents, Antioxidant and Antimicrobial Activities of Different Leaf Extracts of Taraxacum officinale (Dandelion)

2021 ◽  
pp. 13-26
Author(s):  
I. E. Daniel ◽  
K. N. Mathew ◽  
P. L. John
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Bioactive Compounds ◽  
Pathogenic Bacteria ◽  
Taraxacum Officinale ◽  
Antimicrobial Activities ◽  
Leaf Extracts ◽  
Phytochemical Compounds ◽  
Bacteria And Fungi ◽  
Antioxidant And Antimicrobial Activities

Methanol and ethyl acetate leaf extracts of Taraxacum officinale (dandelion) were evaluated for phytochemical compounds, vitamins, antioxidant and antimicrobial activities. Phytochemical compounds and vitamins were determined using standard procedures while antioxidant activity was determined using 2, 2’-diphenyl-1-picrylhydrazyl (DPPH) and Ferric reducing/antioxidant power (FRAP) Assay.  Antimicrobial activity against various pathogenic bacteria and fungi were screened using disc diffusion method. The results indicated that the bioactive compounds (total phenol, flavonoids, saponins, tannins and alkaloids) determined quantitatively were present in appreciable concentration in both extracts. The result also showed that both extracts contain a variety of vitamins (A, B complex, C and E), with vitamins C and A having the highest concentration while the B-vitamins (B1, B2 and B3) and vitamin E were present in moderate concentrations. Both extracts showed significant scavenging and reducing ability comparable to the reference antioxidant, ascorbic acid in a dose dependent manner, with methanol exhibiting the highest scavenging and reducing capacity. The antimicrobial activity of both extracts showed appreciable broad spectrum activity against the pathogenic bacteria and fungi strains tested at various concentrations. Methanol extract was found to be most effective compared to ethyl acetate extract. These results indicated that the leaf extracts of dandelion possess antioxidant and antibacterial activity against the tested bacteria possibly due to the presence of bioactive compounds and other nutrients.

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