Antimicrobial studies of some selected medicinal plants.

Dept. of Biochemistry, J.J.College of Arts & Science, Pudukkottai-622 404. Tamil Nadu, India.
Ancient science of life 04/2002; 21(4):230-9.
Source: PubMed

ABSTRACT Antimicrobial activities were detected in the 80% ethanolic extract of Achyranthes aspera, Ficus glomerata, Leucas aspera, Thespesia populnea and Zizyphus jujube against Escherichia coli, Klebsiella pneumoniae and salmonella typhi. The treatments resulted in the formation of various inhibitory zones, in contrast to the control where no inhibitory zone was observed.

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    ABSTRACT: BAU Kul (Zizyphus mauritiana) is a new and improved variety of plum fruit from Bangladesh. This study was to investigate the antioxidant potency and antimicrobial activity of BAU Kul. BAU Kul is a very good source of phenolics, flavonoids, ascorbic acid and tannins. The reducing sugar and protein content of BAU Kul were 1.68 and 0.81% by weight, respectively. BAU Kul was very active in DPPH scavenging and the ferric reducing antioxidant power assay (527.28 ± 9.2 [µM Fe (II)]/100 g), thus confirming its high antioxidant potential. Antibacterial activities were measured using the agar well diffusion method. BAU Kul was most toxic to Pseudomonas aeruginosa, followed (in order) by Staphylococcus aureus, Salmonella paratyphi, Escherichia coli and Chromobacterium violaceum. In conclusion, BAU Kul is a nutritious fruit that provides good antioxidant and antibacterial activities (in particular towards P. Aeruginosa) and a cheap source of vitamins.
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    ABSTRACT: A chyranthes aspera Linn. (Amaranthaceae family) is an important medicinal plant that possesses many therapeutic properties. The study was conducted to investigate the quantitative components, total antioxidant, and free radical scavenging activities of various extracts of roots and inflorescences of A. aspera. Present study was conducted to evaluate the antioxidant activity of different sequential extracts (petroleum ether, benzene, chloroform, ethyl acetate, ethanol, and distilled water) of A. aspera roots and inflorescence, which includes 1,1-diphenyl-2-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), and total antioxidant capacity (TAC). On other hand, quantitative assays (total phenol content, total flavonol content, total flavonoid content, total proanthocynidin content, and total tannin content) were also assessed using standard protocols. Results depicted strong antioxidant activity in both root and inflorescence parts of A. aspera. It can be inferred that A. aspera serves as a potent antioxidant agent and could be exploited to manufacture drug for the treatment of various human ailments.
    Asian Journal of Pharmaceutics 03/2014; DOI:10.4103/0973-8398.134085
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    ABSTRACT: Nerium indicum [Family:Apocynaceae] is commonly known as Arali [Tam] found throughout India, and has been used in the treatment of cancer, cardiotonic, leprosy and skin diseases. Plant parts such as root, bark and leaves are used. The present study is therefore undertaken to analyse its phyto chemical constituents in solvents like Benene, Chloroform and Alcohol and to screen its antibacterial activity. The dried leaf sample is extracted with solvents by cold maceration. The phytochemical analysis showed the presence of Alkaloids, Terpenoids, Cardiac glycosides, Saponins, Tannins & Carbohydrates in all the solvents. All the extracts were screened for antibacterial activity by Disc Diffusion Method. Out of the cultures used Staphylococccus aureus, Pseudomonas aeruginosa and Salmonella typhimurium showed better zone of inhibition which is 10mm, 9mm & 7 mm respectively.
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