Posted by admin on Nov 1, 2014 in |
CoII complexes of ligands pyridine3carboxamide thiosemicarbazone (L1), pyridine 3 carboxamide semicarbazone (L2), pyridine2carboxamide thiosemicarbazone (L3) and pyridine 2 carboxamide semicarbazone (L4) have been synthesized. The ligands were characterized based on elemental analyses, IR, 1HNMR studies while the complexes were characterized by elemental analyses, molar conductance, magnetic moment, IR, electronic and EPR spectral studies. The complexes are not soluble in ordinary organic solvent but highly soluble in dimethylsulfoxide. The conductivity data show the nonelectrolytic nature of the complexes. Based on elemental analyses, molar conductance data and other spectral studies the complexes were found to have general composition [Co (L)2X2] (where L=L1, L2, L3 and L4, X = Cl–, ½SO42–,NO3–) and exhibit distorted octahedral...
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Posted by admin on Nov 1, 2014 in |
The novel Co (II) and Zn (II) complexes have been synthesized by reaction of CoCl2/ZnCl2 with Schiff bases of benzoyl derivative of 3-methyl-1-phenyl-2-pyrazoline-5-one and sulfa drugs in 1:2 ratio. The synthesized complexes were screened/tested for their antimicrobial activity against pathogenic bacterial strains i.e. E. coli, Staphylococcus aureus strain I, Staphylococcus aureus strain II, Staphylococcus aureus strain III, Vibrio cholera, Gram positive Cocci, Gram positive Bacillus, Gram negative Bacillus, Bacillus subtilis and Salmonella typhimurium. It was found that metal complexes have more antimicrobial activity than their parent Schiff bases. Complexes of Schiff base ligand sulfamerazine and bmphp (L2) were also found to be more...
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Posted by admin on Nov 1, 2014 in |
The present study evaluates the anti-inflammatory potential of the methanol and chloroform extracts of Cleome viscosa and C. burmanni by in-vitro methods.The anti-inflammatory property of the extracts was assessed using albumin denaturation assay, proteinase inhibitory activityand hyaluronidase inhibition assay and the results compared against reference drugs such as Aspirin and Indomethacin. The present findings exhibited a concentration dependent inhibition of albumin denaturation and hyaluronidase enzyme by the extracts of both plants. Proteinase activity was also significantly inhibited by both plant extracts. The methanol extract was more effective than chloroform extract and was comparable to the standards.From the present study, it can be concluded that the extracts of C. viscosa and C. burmanni possessed marked in- vitro anti-inflammatory activity and the effect could be due to the presence of various phytochemicals present in the...
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Posted by admin on Nov 1, 2014 in |
ABSTRACT: (-)-Hydroxycitric acid (HCA) has been found to be the principal acid in genus Garcinia, which is a potential metabolic regulator of anti-obesity activity and inhibitor of lipogenesis. Presence of (-)-HCA as the principal acid has added importance to thegenus Garcinia. The present study deals with extraction and estimation of (-)-HCA from Garcinia lanceaefolia,collected from four administrative districts of Assam, NE India. An improved HPLC methodology has been developed in the present study for estimation of (-)-HCA. Detection of (-)-HCA was done by observing the orange spot on paper chromatography. The Rf values were observed at 0.34 and 0.45 for free HCA and HCA lactone, respectively. Estimation of (-)-HCA was done by HPLC analysis, using water as mobile phase by taking UV detection at 210 nm and has been found to be 4.56 ± 0.13gm/10gm of dried sample. This is the first report of its kind on Garcinia lanceaefolia...
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Posted by admin on Nov 1, 2014 in |
Two new cardenolide metabolites, 7β-OH-uzarigenin (1M) and 7β-OH-odoroside-H (2M) were obtained through the biotransformation of uzarigenin (1) and odoroside-H (2). Compounds 1 and 2 were isolated from the air-dried roots of Nerium oleander L. The plant, belonging to family Apocynaceae, was collected in October, 2010 from Mansoura university garden in Egypt. The methylene chloride extract of the N. Oleander roots was chromatographed using silica gel column, gradually eluted by petroleum ether: Ethyl acetate with increasing proportions of EtOAc. Further purification by repeated crystallization from hot methanol afforded both compounds. The biological transformation was acheived by Cunninghamella echinulata NRRL 1382 with different incubation periods. The structures of the isolated compounds and the newly assigned metabolites were identified using extensive studies; (1H, 13C, HSQC, HMQC, 1H-1H COSY and 1H-13C HMBC), mass spectral analysis (EI and ESI /MS) and IR....
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