Please use this identifier to cite or link to this item:
Title: Biological and Phytochemical Studies on Some Medicinal Orchids of Nepal
Authors: Marasini, Ramesh
Keywords: Medicinal orchids;Phytochemical studies
Issue Date: 2012
Publisher: Department of Chemistry
Institute Name: Central Department of Chemistry
Level: Masters
Abstract: Biological and phytochemical screenings of some orchid species growing in Nepal were studied. The ethanolic extracts of orchid species were tested against both gram positive and gram negative standard bacterial strains viz. Vibrio cholerae, Staphylococcusaureus, Klebsiella pneumoniae, Bacillus subtilis and Escherichia coli. All orchid extracts showed good bacterial Zone of Inhibition(ZOI) against Staphylococcus aureus. The crude extracts of Pholidota imbricata and Coelogyne cristatawere shown highest activity against Vibrio cholerae (ZOI -14 mm) and Staphylococcus aureus(ZOI –14 mm) respectively. The MIC and MBC value of the extracts of Pholidota imbricata and Coelogyne cristata were found to be 62.5 mg/ml and 31.25 mg/ml, 125 mg/ml and 250 mg/ml respectively. Only Pholidota imbricata and Pholidota articulata extracts were shown fairly good activity but all others extracts were shown very less activity or even failed to show any activity against fungal organisms viz.Candida albicans, Rhizopus stolonifer and Mucor spp. From the ethanolic extracts of orchid species, phytocon stituents detected qualitatively were Alkaloids, Terpenoides, Flavonoides, Tannins, Reducing sugars and Cynonogenicglycosides.
Appears in Collections:Chemistry

Files in This Item:
File Description SizeFormat 
Full Thesis.pdf2.43 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.