Faculty of Science & Technology (FST): Recent submissions
Now showing items 1301-1320 of 4284
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A Study Of Intense Ionospheric Scintillation Observed During A Quiet Day In The East African Low-latitude Region
(University of Nairobi, 2013)[1] Ionospheric plasma density irregularities are a common feature of the equatorial and low-latitude ionosphere. These irregularities are known to cause fading and phase fluctuation (scintillation) of L-band radio navigation ... -
Repellent Activities of Essential Oils of Some Plants Used Traditionally to Control the Brown Ear Tick, Rhipicephalus appendiculatus.
(University of Nairobi, 2014-02)Essential oils of eight plants, selected after an ethnobotanical survey conducted in Bukusu community in Bungoma County, western Kenya (Tagetes minuta, Tithonia diversifolia, Juniperus procera, Solanecio mannii, Senna ... -
Decadal trends and common dynamics of the bio-optical and thermal characteristics of the african great lakes.
(University of Nairobi, 2014-04)The Great Lakes of East Africa are among the world's most important freshwater ecosystems. Despite their importance in providing vital resources and ecosystem services, the impact of regional and global environmental drivers ... -
An inventory of medicinal plants that the people of Nandi use to treat malaria.
(University of Nairobi, 2011)In Kenya, most people use traditional medicine and medicinal plants to treat many diseases including malaria. Malaria is one of the major diseases burden worldwide affecting more than 90 countries inhabited by 2.4 billion ... -
Nairobi National Park Game Census, 1966
(University of Nairobi, 1967)1. The monthly game counts of Nairobi National Park in 1966 are compared with those of 1961 to 1983 inclusive. It appears that the mean an-nual population of wild ungulates has remained constant at about 4000 animais after ... -
Further contributions to a knowledge of termite fungi in east Africa: the genus Termitomyces Heim [1968]
(University of Nairobi, 1968) -
Sustainable Management of Urban Green Environments: Challenges and Opportunities
(University of Nairobi, 2014)Urban green areas not only provide aesthetic qualities but also provide important ecosystem services in ever-shrinking habitats, and therefore need sustainable management practices. The western and northwestern parts of ... -
Structure Revision Of Isoline (Ruwenine), Bisline And Isolinecic Acid
(University of Nairobi, 2000-08)X-ray crystallography of bisline, and the chemical interconversion of bisline and isoline (ruwenine), revealed that the structures previously assigned to these alkaloids required revision; as did that of isolinecic acid. -
A Comparative Study of Embelia Schiperi and Embelia Keniensis on Blood Glucose and Triglycerides in Normal and Epinephrine- Induced Hyperglycemic Mice
(University of Nairobi, 1999)Intraperitoneal administration of the methanol extract of Embelia schiperi (ES) to normal mice caused a significant decrease in blood glucose (p < 0.01) and a significant increase in triglycerides 4 hours after administration ... -
Activity of 6-Pentadecylsalicylic Acid from Ozoroa insignis Against Marine Crustaceans
(University of Nairobi, 2002)Bioassay-guided fractionation of the dichloromethane extract from twigs of Ozoroa insignis using Artemia salina larvae as a model led to the isolation of 6-pentadecylsalicylic acid as the active principle. This is the first ... -
Structural Elucidation of New Flavanones Isolated from Erythrina abyssinica
(University of Nairobi, 1996)Three new prenylated flavanones, abyssinin I (1), II (2), and III (3), have been isolated from the African medicinal plant Erythrina abyssinica, together with six known flavanones. The structural elucidation of 1−3 by ... -
A Benzochromene from the Roots of Pentas Bussei
(University of Nairobi, 2002)A new homoprenylated benzochromene, methyl-5,10-dihydroxy-7-methoxy-3-methyl-3-[4-methyl-3-pentenyl]-3H-benzo[f]chromene-9-carboxylate (1), was isolated from the roots of Pentas bussei, collected from Kenya. The structure ... -
Neurotrophic And Antileukemic Daphnane Diterpenoids From Synaptolepis Kirkii
(University of Nairobi, 2002-10)Biological assay guided fractionation of a dichloromethane extract of Synaptolepis kirkii led to the isolation of four new and five known daphnane-type diterpene orthoesters, whose structure was established by spectroscopic ... -
Chemical Constituents And Biological Activities Of Zanthoxylum Usambarense
(University of Nairobi, 2002-02)Bioassay-guided fractionation of the dichloromethane extracts of the roots and the bark of Zanthoxylum usambarense led to the isolation of two physiologically active compounds, i.e. canthin-6-one 1 (fungicide) and pellitorine ... -
Kirkinine, a New Daphnane Orthoester with Potent Neurotrophic Activity from Synaptolepis kirkii
(University of Nairobi, 2000)The bioassay-guided fractionation of a dichloromethane extract from the roots of Synaptolepis kirkii using neuronal viability as a model allowed the isolation of the new daphnane orthoester kirkinine (1a) as a powerful ... -
On the magnetic memory phenomenon in rocks and its bearing on palaeomagnetic measurements
(University of Nairobi, 1968)The results of recent extensive studies on the low field hysteresis in basalts from India and East Africa and the memory phenomenon observed in some of the rocks have been found to have a direct bearing on the various ... -
Problems concerning the magnetic behaviour and determination of curie points of certain basalts
(1972)Magnetic hysteresis studies at different fields and temperatures have been carried out on several basalts. From such studies it would be often possible to delineate the single or multidomain character of the sample and in ... -
The Palaeomagnetism of some Scottish Tertiary Dykes and their Baked Contacts
(University of Nairobi, 1964)This paper presents results of measurements of the directions of magnetization of dyke samples and the associated baked sediments collected from Ayrshire in Scotland. The results suggest that these reversely and normally ... -
Palaeomagnetism of the tororo ring complex, S.E. Uganda
(University of Nairobi, 1973)Palaeomagnetic measurements on the pre-Miocene carbonatite volcanics of Tororo, S.E. Uganda, have yielded a pole at 75.8°N, 195.5°E with A95 = 9.4°. Along with the Tertiary poles from East African rift systems, the ... -
Impact of earthquakes and volcanic eruptions on the environment.
(University of Nairobi,, 1996)
