Posted by admin on Jun 30, 2015 in |
A series of novel 3-(substituted aryl)-1-(5-methylfuran-2-yl)prop-2-en-1-one derivatives (3a-k) were synthesized from commercially available 2-acetyl-5-methylfuran and various substituted aromatic aldehydes in presence of anhydrous potassium carbonate in ethanol solution and by microwave irradiation method with good yield compared to conventional method. Anhydrous potassium carbonate has been utilized as safe, inexpensive and efficient basic catalyst for synthesis of chalcones. The structures of the all synthesized compounds have been established on the basis of IR, Mass, 1H NMR and 13C NMR. The antimicrobial activities of these derivatives were evaluated by quantifying the minimal inhibitory concentration (MIC) against various microbial strains such as Escherichia coli [ATCC-9637], Staphylococcus aureus [ATCC-25923], Klebsiella pneumonia [ATCC-13883], Candida albicans [ATCC-28366], Rhizopus arrhizus [ATCC-11145] and Aspegillus niger [ATCC-26036]. Among the tested compounds, compound 3h exhibited strong microbial activity against most of the microbial strains except A....
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Posted by admin on May 30, 2015 in |
The present study deals with the evaluation of the antimicrobial activity in methanolic extracts of in vivo (leaf, stem and seed) and in vitro (callus) plant parts of Merremia dissecta and Merremia aegyptia belonging to family Convolvulaceae. The antimicrobial activity against six different microbial strains, four bacterial viz. Bacillus thuringiensis, Bacillus subtilis, Eschrechia coli and Pseudomonas putida and two fungal strains viz. Candida albicans and Aspergillus niger was studied. Initially, plant extracts prepared in four different solvents (Aqueous, Methanol, Ethanol, and Petroleum Ether) were screened for their antimicrobial activity through TTZ test (Tetrazolium Chloride Test). It was assessed that alcoholic sample extracts possessed highest antimicrobial activity amongst all. Later the antimicrobial activity of the methanolic extracts was confirmed using Disc-Agar Diffusion technique. The inhibition zone observed was representative of the antimicrobial potency of that particular sample extract. Zones of inhibition ranging from 6mm to 14mm were observed. The largest zones of inhibition were observed from the leaf extracts of these plants and the leaf extract of Merremia aegyptia also...
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Posted by admin on May 30, 2015 in |
Biologically potent compounds are one of the most important classes of materials for the upcoming generations. Increasing number of microbial infectious diseases and resistant pathogens create a demand and urgency to develop novel, potent, safe and improved variety of antimicrobial agents. This initiates a task for current chemistry to synthesize compounds that show promising activity as therapeutic agents with lower toxicity. Therefore, a substantial research is needed for their discovery and improvement. Transition metal complexes share an important place in this regards. Further, it is evidenced that complexation of above metal ions with nitrogen and sulphur donor ligands increases the efficiency of biocidal activity. For the same, metallic soaps of copper (derived from common fatty acids) were complexed with substituted 2-amino benzothiazole derivatives. Complexes were characterized by elemental analysis IR, NMR and ESR spectral data. Their purity was checked by Thin Layer Chromatography. Their antimicrobial efficacy / biological activity was examined against selective bacteria such as Pseudomonas aeruginosa (Gram negative), Lactobacillus aciedophillus (Gram positive), antifungal activity against Fusarium semitectum...
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Posted by admin on May 30, 2015 in |
Heterocyclic compounds are acquiring more importance in recent years because of their pharmacological activities. Pyrazolones have a particular value due to their broad spectrum of biological activity and their wide ranging utility as synthetic tools in the design of various bioactive molecules. Pyrazolone is a five membered lactum ring, containing two nitrogen and one ketonic group in its structure. In addition, pyrazolones possess antimicrobial, antifungal, antimycobacterial, antibacterial, anti-inflammatory, antitumor, gastric secretion stimulatory, antidepressant and antifilarial activities. They also serve as precursors for dyes, pigments, pesticides and chelating agents, besides finding applications in the extraction and separation of various metal ions. The high therapeutic properties of the pyrazolone releted drugs have encouraged the medicinal chemists to synthesized a large number of novel chemotherapeutic agents. Numerous methods for the synthesis of pyrazolone and also their various structure reactions offer enormous scope in the field of medicinal chemistry. This articles aims to review the work reported, their chemistry and biological activities of pyrazolone during past...
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Posted by admin on May 30, 2015 in |
The aim of this study was to determine the anti-microbial and anti-adhesive properties of a Lactobacillus and Bacillus, against several micro-organisms, including Gram-positive and Gram-negative bacteria. Biofilm producing micro- organisms were isolated from different samples. The isolated micro-organism were characterized and identified. The anti-microbial and anti-adhesive activities were determined. The bacteroicin production was quantified and was observed. The maximum bacteroicin production was observed among various isolated micoorganisms. The bacteroicin produced by the Lactobacilli and Bacilli showed antimicrobial activity against pathogenic micro-organisms (including Pseudomonas, Escherichia col, Staphylococcus, Aspergillus and Salmonella typhi), the minimum inhibitory concentration (MIC) were achieved for bacteroicins the most. The antagonistic characteristics of bacteriocin were studied by agar well diffusion method. Furthermore, the micro- organism showed anti-adhesive activity against most of the micro-organisms evaluated. Biofilm production was observed and quantified among various biofilm producing isolated micro-...
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