Faculty of Science & Technology (FST): Recent submissions
Now showing items 3161-3180 of 4283
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Two isoflavanones from the stem bark of Erythrina sacleuxii
(University of NairobiDepartment of Chemistry, University of Nairobi, 2000-11)From the stem bark of Erythrina sacleuxii two new isoflavanones, (R)-5,7-dihydroxy-2′,4′,5′-trimethoxyisoflavanone (trivial name, (R)-2,3-dihydro-7-demethylrobustigenin) and (R)-5-hydroxy-2′,4′,5′-trimethoxy-2″,2″-dimeth ... -
Antiprotozoal Compounds from Asparagus africanus
(ACSDepartment of Chemistry, 1997)Two antiprotozoal compounds have been isolated from the roots of Asparagus africanus Lam. (Liliaceae), a new sapogenin, 2β,12α-dihydroxy-(25R)-spirosta-4,7-dien-3-one (1), which was named muzanzagenin, and the lignan ... -
Metal cations for the determination of fluorescent phosphoinositides by capillary electrophoresis
(College of Biological and Physical Sciences, University of Nairobi, 2008)Phosphatidylinositol (PI) and its phosphorylated derivatives known as phosphoinositides (PIPs), are essential regulators of cell signaling and membrane trafficking, cytoskeletal dynamics, and nuclear functions. Disruption ... -
Anchoring and Weighting Knowledge Economy and Knowledge Indices as improved measures of a country’s readiness for the Knowledge Economy: A case study of Kenya
(University of NairobiCollege of biological and physical science, 2012)This study sought to develop a set of indices better able to track a country's readiness for the knowledge economy. The new indices, the Anchored Knowledge Index and the Anchored Knowledge Economy Index are based on the ... -
Flavones and phenylpropenoids in the surface exudate of Psiadia punctulata
(University of NairobiDepartment of Chemistry, University of Nairobi, 2001-06)Three flavones, 5,7-dihydroxy-2′,3′,4′,5′-tetramethoxyflavone, 5,4′-dihydroxy-7,2′,3′,5′-tetramethoxyflavone, and 5,7,4′-trihydroxy-2′,3′,5′ -trimethoxyflavone were isolated from the leaf exudate of Psiadia punctulata, ... -
Antiplasmodial Flavonoids from Erythrina sacleuxii
(University of NairobiDepartment of Chemistry, University of NairobiDepartment of Chemistry, Maseno University, 2006-02)The acetone extracts of the root bark and stem bark of Erythrina sacleuxii showed antiplasmodial activities against the chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of Plasmodium falciparum. Chromatographic ... -
Potent Antimalarial Activity of the Alkaloid Nitidine, Isolated from a Kenyan Herbal Remedy
(Ministry of Health, KenyaThe Wellcome Trust Research LaboratoriesThe National Museums of Kenya,Kenya Medical Research InstituteDepartment of Pharmaceutical Sciences, University of StrathclydeDepartment of Pharmacology and Therapeutics, University of Liverpool, 1995)Bioassay-guided fractionation of extracts of Toddalia asiatica, a plant used by the Pokot tribe of Kenya to treat fevers, has yielded the alkaloid nitidine as the major antimalarial component. Fractions containing nitidine ... -
Building Swahili Resource Grammars for the Grammatical Framework
(University of NairobiCollege of biological and physical science, 2012)Grammatical Framework (GF) is a multilingual parsing and generation framework. In this paper, we describe the development of the Swahili Resource Grammar, a first in extending GF’s coverage with a Bantu language. The paper ... -
LINE-1 preTa Elements in the Human Genome
(Department of Biological Sciences, Biological Computation and Visualization Center, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA 70803, USA, 2003)The preTa subfamily of long interspersed elements (LINEs) is characterized by a three base-pair “ACG” sequence in the 3′ untranslated region, contains approximately 400 members in the human genome, and has low level of ... -
Peak Revision Mathematics
(2013-06-17) -
Analysis of the Human Alu Ya-lineage
(Department of Biological Sciences, Biological Computation and Visualization Center, Center for Bio-Modular Microsystems, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA 70803, USA, 2004)The Alu Ya-lineage is a group of related, short interspersed elements (SINEs) found in primates. This lineage includes subfamilies Ya1–Ya5, Ya5a2 and others. Some of these subfamilies are still actively mobilizing in the ... -
Algebra 1 and 11 (O.D.L Lecture Notes)
(2013-06-17) -
Misingi Ya Hisabati1,2,3
(2013-06-17) -
Towards sustainable production and use of charcoal in Kenya: exploring the potential in life cycle management approach
(ElsevierDepartment of Chemistry University of Nairobi, 2004)The study seeks to demonstrate the potential role that industrial ecology could play towards energy poverty reduction and environmental conservation in Kenya through sustainable charcoal production and consumption. This ... -
Success Primary Mathematics1,2,3,4,5,6,7,8 E.AE.P
(2013-06-17) -
Flavonoids and isoflavonoids from Tephrosia fulvinervis and Tephrosia pentaphylla
(University of NairobiCollege of Biological and Physical Sciences, 1989)From the roots, leaves and pods of Tephrosia pentaphylla three new 6-oxygenated rotenoids (dihydrostemonal, 9-demethyldihydrostemonal and 6-acetoxydihydrostemonal) were isolated and characterized. In addition six known ... -
Antimicrobial flavonoids from the stem bark of Erythrina burttii
(University of NairobiCollege of bilogical and physical science, 2005-07)The chloroform extract of the stem bark of Erythrina burttii showed antifungal and antibacterial activities using the disk diffusion method. Flavonoids were identified as the active principles. Activities were observed ... -
Anti-plasmodial activities and X-ray crystal structures of rotenoids from Millettia usaramensis subspecies usaramensis
(University of NairobiDepartment of Chemistry, University of NairobiDepartment of Pharmacology and Pharmacognosy, University of NairobiDepartment of Crystallography, Birkbeck College, University of London, 2003-10)The dichloromethane extract of the stem bark of Millettia usaramensis subspecies usaramensis showed anti-plasmodial activity against the chloroquine sensitive (D6) and chloroquine resistant (W2) strains of Plasmodium ... -
On the characterization of Class R_1 of non-normal operators in a Hilbert space
(Department of Mathematics, College of Biological and Physical Sciences, University of Nairobi, 2012) -
Changes in plant growth, nutrient dynamics and accumulation of flavonoids and anthocyanins by manipulating the cropping systems involving legumes and cereals- a review
(Department of botany, University of Nairobi, 2011)Improved crop production is very important in Africa, especially in such time when food required exceeds food produced. However, improved yield is constrained by a number of biophysical factors including poor planting ...
