scholarly journals Antioxidant and Antimicrobial Activities of Ethanol Extract from the Stem and Leaf of Impatiens balsamina L. (Balsaminaceae) at Different Harvest Times

Molecules ◽  
2013 ◽  
Vol 18 (6) ◽  
pp. 6356-6365 ◽  
Author(s):  
Suk-Nam Kang ◽  
Young-Min Goo ◽  
Mi-Ra Yang ◽  
Rashid Ibrahim ◽  
Jae-Hyeon Cho ◽  
...  
Keyword(s):  
Ethanol Extract ◽  
Antimicrobial Activities ◽  
Impatiens Balsamina ◽  
Antioxidant And Antimicrobial Activities

scholarly journals Phytochemical analysis, antioxidant and antimicrobial activities of Salvia virgata mericarps

2021 ◽  
Vol 45 (2) ◽  
pp. 223-231
Author(s):  
Kara Guzel ◽  
Mahmut Ulger ◽  
Ahmet Kahraman
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Ethanol Extract ◽  
Antimicrobial Activities ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Dietary Fibers ◽  
Reference Drug ◽  
Phenolic And Flavonoid ◽  
Antioxidant And Antimicrobial Activities

The phytochemical contents of Salvia virgata mericarps and the antioxidant and antimicrobial activities of its ethanol extract were studied for the first time. S. virgata mericarps were collected in the province of Trabzon, Turkey. Chemical analyses were performed using chromatographic methods. The total phenolic and flavonoid contents and antioxidant potential were measured using Folin-Ciocalteu, Al(NO3)3, and DPPH radical scavenging activity methods, respectively. The antimicrobial activity was evaluated using the microdilution method for all the tested bacterial and fungal strains, with the exception of Mycobacterium tuberculosis for which the resazurin microtiter plate method was applied. The mericarps were rich in glutamic acid (3934 mg/100 g), potassium (12578.8 ?g/g), calcium (12092.0 ?g/g), and dietary fibers (35.565 g/100 g). The total phenolic and flavonoid contents were 2.50 ?g GAE/mg extract and 0.34 ?g QE/mg extract, respectively. The most effective DPPH free radical scavenging activity determined for the highest applied concentration was 92.44%. The ethanol extract obtained from the mericarps was found to be as effective as the reference drug ampicillin (MIC value = 125 ?g/mL) against the nosocomial pathogen Acinetobacter baumannii. In conclusion, S. virgata mericarps provide good nutritional value with low amounts of carbohydrates and high dietary fibers, amino acids, minerals and total phenolic and flavonoid contents and medicinal properties.

scholarly journals Phytochemical Screening, Antioxidant and Antimicrobial Activities of the Essential Oils and Ethanol Extract of Psidium guajava Leaf

2019 ◽  
pp. 1-8
Author(s):  
Andrew Emmanuel ◽  
Dimas Kubmarawa ◽  
Galo Yahaya Sara ◽  
Akurenda Wahu
Keyword(s):  
Essential Oil ◽  
Ethanol Extract ◽  
Psidium Guajava ◽  
Antimicrobial Activities ◽  
Herbal Remedies ◽  
Diffusion Method ◽  
Phytochemical Screening ◽  
Standard Drug ◽  
Dpph Method ◽  
Antioxidant And Antimicrobial Activities

Objective: To investigate the Phytochemical screening, antioxidant and antimicrobial activities of the essential oil and ethanol extract of Psidium guajava. Methods: The leaf of Psidium guajavabelongs to the myrtle family (Myrtacease) which is used as herbal remedies for the cure of many ailments by natives in northern part of Nigeria, was collected in June, 2018 from the Professor’s Quarters of Modibbo Adama University of Technology (MAUTECH) Yola. The leaf was air dried, pulverized and extracted by simple overnight maceration technique and then analyzed. Fresh leaf of the aforementioned was extracted using modified steam distillation. The phytochemical screening of the ethanol extract was carried out using standard method. Results: The result revealed the present of Tannin, Flavanoid, Alkaloid, Volatile oil, Triterpene, Saponin, Glycoside while phenolic compound was absent in the ethanol extract of Psidium guajava. The result of the antioxidant activity of the essential oil was screened using DPPH method and the IC25 values of ascorbic acid (standard drug)  was 57.92 µl/m and Psidium guajava of the essential oil  was 46.55 µl/ml  respectively. Antibacterial activity was carried out using dics diffusion method and the results showed reasonable zone of inhibition against tasted organisms, with Staphylococcus epidemidis being the most inhibited (23 mm) and Proteus vulgari being the least inhibited (2 mm) with the ethanol extract of Psidium guajava. In contrast, Staphylococcus aureus was the most inhibited (13 mm) and Salmonella typhi showed the least inhibition (9mm) in the essential oil of Psidium guajava. Conclusion: The result, thus support the use of the plants traditionally to treat chronic diarrhea, fever, diabetes, malaria and suggest its usage in the formulation of new antioxidant and antibacterial drugs.

The antioxidant and antimicrobial activities of methanolic extracts from houseleek (Sempervivum marmoreum L.) leaves

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
S Stojièević ◽  
I Stanisavljević ◽  
D Velièković ◽  
V Veljković ◽  
M Lazić
Keyword(s):  
Antimicrobial Activities ◽  
Methanolic Extracts ◽  
Antioxidant And Antimicrobial Activities

scholarly journals Precursor-Boosted Production of Metabolites in Nasturtium officinale Microshoots Grown in Plantform Bioreactors, and Antioxidant and Antimicrobial Activities of Biomass Extracts

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4660
Author(s):  
Marta Klimek-Szczykutowicz ◽  
Michał Dziurka ◽  
Ivica Blažević ◽  
Azra Đulović ◽  
Małgorzata Miazga-Karska ◽  
...  
Keyword(s):  
Photosynthetic Pigments ◽  
Human Fibroblasts ◽  
Antimicrobial Activities ◽  
Precursor Feeding ◽  
Nasturtium Officinale ◽  
Qualitative And Quantitative ◽  
Normal Human ◽  
Inhibition Zones ◽  
Ferulic Acids ◽  
Antioxidant And Antimicrobial Activities

The study demonstrated the effects of precursor feeding on the production of glucosinolates (GSLs), flavonoids, polyphenols, saccharides, and photosynthetic pigments in Nasturtium officinale microshoot cultures grown in Plantform bioreactors. It also evaluated the antioxidant and antimicrobial activities of extracts. L-phenylalanine (Phe) and L-tryptophan (Trp) as precursors were tested at 0.05, 0.1, 0.5, 1.0, and 3.0 mM. They were added at the beginning (day 0) or on day 10 of the culture. Microshoots were harvested after 20 days. Microshoots treated with 3.0 mM Phe (day 0) had the highest total GSL content (269.20 mg/100 g DW). The qualitative and quantitative profiles of the GSLs (UHPLC-DAD-MS/MS) were influenced by precursor feeding. Phe at 3.0 mM stimulated the best production of 4-methoxyglucobrassicin (149.99 mg/100 g DW) and gluconasturtiin (36.17 mg/100 g DW). Total flavonoids increased to a maximum of 1364.38 mg/100 g DW with 3.0 mM Phe (day 0), and polyphenols to a maximum of 1062.76 mg/100 g DW with 3.0 mM Trp (day 0). The precursors also increased the amounts of p-coumaric and ferulic acids, and rutoside, and generally increased the production of active photosynthetic pigments. Antioxidant potential increased the most with 0.1 mM Phe (day 0) (CUPRAC, FRAP), and with 0.5 mM Trp (day 10) (DPPH). The extracts of microshoots treated with 3.0 mM Phe (day 0) showed the most promising bacteriostatic activity against microaerobic Gram-positive acne strains (MIC 250–500 µg/mL, 20–21 mm inhibition zones). No extract was cytotoxic to normal human fibroblasts over the tested concentration range (up to 250 μg/mL).

Sign in / Sign up

Export Citation Format

Share Document