Influence of dissolved oxygen on the synthesis of Ag-Au mono and bimetallic nanostructure using Cudrania tricuspidata leaf extract and its broad-spectrum antibacterial activity

2021 ◽  
pp. 131471
Author(s):  
Palanivel Velmurugan ◽  
Vinayagam Mohanavel ◽  
Palanivel Sekar ◽  
Selvaraj Vijayanand ◽  
Arunachalam Chinnathambi ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Dissolved Oxygen ◽  
Broad Spectrum ◽  
Leaf Extract ◽  
Cudrania Tricuspidata ◽  
Bimetallic Nanostructure

scholarly journals In vitro antibacterial potential of acetone leaf extract of Otostegia integrifolia Benth against human selected bacterial pathogens

2020 ◽  
Vol 11 (3) ◽  
pp. 3024-3033
Author(s):  
Kidu Hintsa ◽  
Tekleweyni Tadege ◽  
Tesfay Weletnsae ◽  
Gopalakrishnan V K ◽  
Kamalakararao K ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Broad Spectrum ◽  
Leaf Extract ◽  
Bacterial Pathogens ◽  
Resistant Bacteria ◽  
Phytochemical Analysis ◽  
Leaf Extracts ◽  
Broth Dilution ◽  
Antibacterial Potential

Otostegia integrifolia Benth (O. integrifolia) is the endogenous medicinal plant of Ethiopia mostly used for the treatment of Stomach ache, tonsillitis, hypertension, malaria, ascariasis, and lung diseases. The current study was focused on phytochemical analysis and evaluation of the antibacterial activity of O. integrifolia Benth leave extracts against selected human bacterial pathogen by the agar well diffusion and microtube broth dilution method. Plant leaves were extracted with less polar to high polar solvents such as petroleum ether, chloroform, acetone, and ethanol. Phytochemical investigation was carried out for the identification of secondary metabolites responsible for antibacterial activity. In vitro antibacterial potential of O.integrifolia Benth leaf organic extracts against human pathogenic gram-negative (E. coli, K. pneumonia, V. cholera) and positive bacteria (B.subtilis, E. faecalis, S.aureus) were assessed by agar well diffusion, and bacterial inhibitory concentration of effective plant extracts was determined by 96 well plate broth dilution assay. Among all the tested organic leaf extracts, the acetone leaf extract of O.integrifolia Benth exhibited a promising broad spectrum of in vitro antibacterial activity against all tested multiple drug-resistant bacteria pathogens with significant MIC values of K.pneumoniae (2.144µg/ml), V. cholera (2.025µg), B.substilis (2.604 µg), and S.aureus (3.028 µg), respectively. The significant antibacterial activity of acetone leaf extracts of O. integrifolia Benth was due to the existence of flavonoids and phenolic compounds. The current studies demonstrated that the broad-spectrum antibacterial activity of acetone leaf extracts of O.integrifolia Benth might be helpful for the isolation of novel potent antibacterial agents against infectious bacterial pathogens without any side effects.

Evaluation of antioxidant enzyme content, phenolic content, and antibacterial activity of Commiphora gileadensis grown in Saudi Arabia

2021 ◽  
Vol 19 (4) ◽  
pp. 329-343
Author(s):  
Yaaser Q. Almulaiky ◽  
Ammar AL-Farga
Keyword(s):  
Antibacterial Activity ◽  
Saudi Arabia ◽  
Oral Hygiene ◽  
Leaf Extract ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Scavenging Activity ◽  
Reference Drug ◽  
Wide Range ◽  
Peel Extract

Commiphora gileadensis is commonly used in Saudi Arabia for oral hygiene. A lack of data about its biological activity encouraged us to evaluate the antioxidant and antibacterial activities of its leaf and stem extracts. Ethanol, methanol, acetone and deionized water were tested as extraction solvents. 80% methanol gave the highest extracted concentrations of phenolic and flavonoid substances. The leaf and stem extracts were respectively evaluated for their radical scavenging activity with DPPH (EC50 = 3.39, and 1.06), ABTS (EC50 = 0.690, and 0.55), and peroxide scavenging activity (EC50 = 2.43, and 1.28). GC-MS identified a wide range of compounds that may be responsible for these activities of the results observed. The highest levels of chlorophyll, carotenoids, and lycopene were found in the leaf extract while level of proanthocyanidins was found in the stem peels extract. The peroxidase and catalase activities of stem peel extract were higher than those of the leaf extract. The findings showed that the leaf and stem peel extracts of C. gileadensis exhibited significant antibacterial activity against the test organisms. The minimum inhibitory concentrations for the plant extracts were compared with the standard reference drug Augmentin but the time–kill curves for the C. gileadensis extracts showed that they were less effective than Augmentin. Moreover, the stem peel extract exhibited stronger antibacterial activity than the leaf extract. In conclusion, C. gileadensis can be an important source of natural antioxidants, used as a healthy chewing stick for teeth brushing and oral hygiene purposes.

Green Synthesis of Silver Nanoparticles using Citrus aurantifolia (Bangladeshi Lemon Leaf) Extract and Its Antibacterial Activity

2021 ◽  
Author(s):  
Joy James Costa ◽  
Hassan Hosseinzadeh ◽  
Dabasish Kumar Saha ◽  
Shihab Uddin Al Mahmud ◽  
Bhuiyan Mohammad Mahtab Uddin ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Citrus Aurantifolia

scholarly journals PHYTOCHEMICAL ANALYSIS AND ANTIBACTERIAL ACTIVITY OF SWIETENIA MAHAGONI – A HIGHLY MEDICINAL PLANT IN INDIA

2016 ◽  
Vol 9 (6) ◽  
pp. 62
Author(s):  
Dhanapaul Vinoth Kumar
Keyword(s):  
Antibacterial Activity ◽  
Bacillus Subtilis ◽  
Leaf Extract ◽  
Phytochemical Analysis ◽  
Zone Of Inhibition ◽  
Volatile Oils ◽  
Medicinal Uses ◽  
Antibacterial Study ◽  
Active Constituents ◽  
Swietenia Mahagoni

The present study was designed to evaluate the phytochemical analysis and antibacterial activity of Swietenia mahagoni leaf extract. The leaf extract was subjected to a variety of phytochemical analysis. The qualitative phytochemical tests exhibited the presence of common phytocompounds like alkaloids, tannins, saponins, phlobatannins, flavanoids, terpenoids and volatile oils as major active constituents. The plant (Swietenia mahagoni) leaf has valuable medicinal uses, hence petroleum ether (18.2g) was found to be a good solvent for the phytochemical and antibacterial study. Similarly, the Methanolic leaf extract of Swietenia mahagoni has highest zone of inhibition on Bacillus subtilis.

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