Phytochemical and biological studies of extracts of flower heads of spitanthes mauritiana D.C.

Simple item page
dc.contributor.authorWafula, Alphonse Wanyonyi
dc.date.accessioned2012-05-17T08:12:44Z
dc.date.available2012-05-17T08:12:44Z
dc.date.issued2012-05-17
dc.descriptionDepartment of Biochemistry and Biotechnology, The QK 866.W6 1992en_US
dc.description.abstractPhytochemical analysis of extracts of the flowers of spilanthse mauritiana DC revealed the occurrence of alkaloids, anthocyanins, steroids, polyoses, tannins, flavonoids, coumarins, polyacetylenes and reducing compounds. Chromatographic purification led to five homogenous samples. Uv and ir spectral analysis suggested the presence of triple and double bonds as well as hydroxy or amine or amide groups. One of the fractions yielded a crystal after repeated chromatographic purification. The Uv, ir,ms and nmr data of the chrystals led to the identification of the compound as stigmasterol. The methanol and chloroform extracts of the flowers gave LD50 of mosquitolarvicidal activities at 31.6 ppm and 2.23 ppm respectively. The methanol extract showed no molluscidal activity upto 500 ppm. Fractions three upto ten from chloroform extract purified on open silica gel column showed percentage mortality rate of 40,68,90,98,94,78 and 60 respectively at the concentration of 5 ppm against mosquito larvae.en_US
dc.description.sponsorshipKenyatta Universityen_US
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/4636
dc.language.isoenen_US
dc.subjectBotanical chemistry Spilanthesen_US
dc.titlePhytochemical and biological studies of extracts of flower heads of spitanthes mauritiana D.C.en_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Phytochemical and biological studies of extracts.pdf
Size:
52.6 MB
Format:
Adobe Portable Document Format
Description:
Theses full text
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.68 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
MST-Department of Biochemistry and Biotechnology