substances from other sources with proven antimicrobial activity. C 4 grasses are more competitive under the conditions of high temperature, solar radiation and low moisture. [9] C 4 grasses are more efficient at gathering Carbon dioxide, utilizing nitrogen from the atmosphere and recycled N in the soil. [10-11] C. setigerus L. (Poaceae) is highly nutritious grass and considered excellent for pasture in hot, dry areas and is valued for its production of palatable forage and intermittent grazing during droughty periods in the tropics. This grass has excellent soil binding capacity which helps to conserve soil in desert areas. [12] Although, C. setigerus is most suitable and highly nutritive grasses for desert environmental conditions, still no antimicrobial work has yet been recorded. The present investigation evaluated the antibacterial and antifungal effects of crude extracts of C. setigerus and
Aim:The aim of present study is to investigate the antimicrobial activity of (Flower, Ripen fruit and calyx) of Withania somnifera (RUBL20668) extracts, in order to use them as a possible source of new antimicrobial substances against important human pathogens. Materials and Methods: Crude extracts of different parts of both species of W. somnifera were evaluated against some important bacteria (two Gram +ve and four Gram-ve bacteria). Staphylococcus aureus (Gram +ve), Bacillus Subtilis (Gram +ve), Escherichia coli (Gram-ve), Raoultella planticola (Gram-ve), Pseudomonas aeruginosa (Gram-ve), Enterobactor aerogens (Gram-ve), one yeast Candida albicans and one fungus Aspergillus flavus. The dried and powdered seeds were successively extracted with hexane, toluene, iso propyl alcohol, acetone and ethanol, using the soxhlet assembly. The antimicrobial activity assay was done by both disc diffusion and serial dilution methods. Result: The results indicate that all the extracts in different polar solvents did not show any antibacterial activity against S. aureus, E. coli, R. planticola or E. aerogens or any antifungal activity against A. flavus. Conclusion: All extracts in the different polar solvents did not have or had very less antibacterial and antifungal activities.
The present study was carried out to determine the possible bioactive components (steroids) -stigmasta-4,22-dien-3-one(4.93%), δ4-sitosterol-3-one (stigmast-4-en-3-one)
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