Browsing Faculty of Science & Technology (FST) by Title
Now showing items 2662-2681 of 4283
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A Neoarchean paleomagnetic pole from the Kisii Series of western Kenya: Implications for crustal mobility
(University of Nairobi, 2016)The Kisii Series lavas of western Kenya were the target of a paleomagnetic study. The Kisii Series is a volcano-sedimentary sequence dated to 2531 ± 3 Ma (U–Pb) that rests unconformably over the Mesoarchean–Neoarchean ... -
Neotectonics and extension direction of the Southern Kenya rift, lake Magadi area
(University of Nairobi, 2003)The Magadi area, located in the southern part of the Kenya Rift, is a seismically active region where rifting is still in progress. The recent tectonic activity has been investigated through a seismological survey and the ... -
A nested multivariate chemometrics based calibration strategy for direct trace biometal analysis in soft tissue utilizing Energy Dispersive X-Ray Fluorescence (EDXRF) and scattering spectrometry.
(University of Nairobi, 2017)Compton scatter-modulated fluorescence and multivariate chemometric (artificial neural network (ANN) and principal component regression (PCR)) calibration strategy was explored for direct rapid trace biometals (Mn, Fe, Cu, ... -
A nested PCR assay exhibits enhanced sensitivity for detection of Theileria parva infections in bovine blood samples from carrier animals
(School of Biological Sciences, 2010)Theileria parva causes East Coast fever, an economically important disease of cattle in sub-Saharan Africa. We describe a nested polymerase chain reaction (nPCR) assay for the detection of T. parva DNA in cattle blood ... -
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 ... -
New Amblyseius mite from Brazil. Rev. Brasil. Biol., 35: 549
(School of Biological Sciences, 1975) -
New antitrypanosomal tetranotriterpenoids from Azadirachta Indica
(University of Nairobi, 1972-07)Organic extracts of the leaves of Azadirachta indica A. Juss. yielded ten antitrypanosomal terpenoids. Three of these (1 – 3), are novel and are derivatives of nimbolide and nimbin. They were extracted from chloroform fraction ... -
New Approach in Research Education to Solve Problems of Dryland Farming in Africa
(University of Nairobi.Department of Botany University of Nairobi Kenya, Africa, 1996)For quite some time now, Africa has faced food shortages that are largely due to deterioration of agricultural environments and high population growth rates, leading to a combination of production pressures. The agricultural ... -
A New Approach to Search for the Bioactive Conformation of Glucagon: Positional Cyclization Scanning
(2001-09)In search for the bioactive conformation of glucagon, “positional cyclization scanning” was used to determine secondary structures of glucagon required for maximal interaction with the glucagon receptor. Because glucagon ... -
New aspects and perspectives on Tsavorite Deposits
(2013)Tsavorite, the vanadian variety of green grossular, is a high value economic gemstone. It is hosted exclusively in the metasedimentary formations from the Neoproterozoic Metamorphic Mozambique Belt. The deposits are mined ... -
A new basic chromosome number in Saccharum spontaneum L.
(College of Biological Sciences, University of Nairobi, 1990)Study of meiosis in a clone of S. spontaneum (2n = 54), revealed that 11.39 ± 2.52% of PMCs undergo cytomixis during premetaphase I. Only 18 bivalents migrated with the nucleolus into the recipient cell and 9 remained in ... -
A new C-C linked benzophenathridine-2-quinoline dimer, and the antiplasmodial activity of alkaloids from Zanthoxylum holstzianum
(University of Nairobi, 2023)The CH2Cl2/MeOH (1:1) extract of Zanthoxylum holstzianum stem bark showed good antiplasmodial activity (IC50 2.5 ± 0.3 and 2.6 ± 0.3 µg/mL against the W2 and D6 strains of Plasmodium falciparum, respectively). From the ... -
New dematiaceous hyphomycetes from Kenyan rare plants
(University of NairobiCollege of biological and physical science, 1999) -
New Dialkyl Benzoquinones from Fruits of Myrsine africana L and Maesa lanceolata, Forsk
(Department of Chemistry, 1996)Two new natural benzoquinones, 2,5-dihydroxy-3-methyl-6-undecyl-1,4-benzoquinone (1, muketanin) and 2-O-methyl-muketanin (2) have been isolated from fruits of Myrsine africana and Maesa lanceolata respectively. -
New ent-clerodane and abietane diterpenoids from the roots of Kenyan croton megalocarpoides Friis & M. G. Gilbert
(University of Nairobi, 2016)The roots of the endangered medicinal plant Croton megalocarpoides collected in Kenya were investigated and twenty-two compounds isolated. Among them were twelve new ent-clerodane (1–12) and a new abietane (13) diterpenoids, ... -
A New Flavonol Tetraglycoside from Myrsine Africana Leaves
(Department of Chemistry, 1996)A new flavonol glycoside, quercetin 3 - glucosyl (1′″ - 4″) rhamnoside - 7 -rhamnosyl (1′″ - 6″″) glucoside (1) together with known flavonol glycosides, quercetin 3 -rhamnoside (2), quercetin 3 - glucoside (3) and myricetin ... -
New fossilferous sites in Gatarakwa, central Kenya : Their geological setting, stratigraphy, and contribution to palaeontological research in East Africa
(Department of Geology, University of Nairobi, 2001) -
A new genus in the subfamily Nothopodinae with description of four new species from East Africa (Acari : Eriophyoidea : Eriophyidae)
(1992)A new genus and four new species are described. Neofloracarus guajavae gen. et sp. nov. and Phyllocoptes lantanae sp. nov. were found on guavas and Lantana camara, resp., in Kenya, and Aculus didymbotryae sp. nov. and ...