Browsing Faculty of Science & Technology (FST) by Title
Now showing items 4077-4096 of 4283
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Tsetse and other biting fly responses to Nzi traps baited with octenol, phenols and acetone
(School of Biological Sciences, 2007)Octenol (1-octen-3-ol), acetone, 4-methylphenol, 3-n-propylphenol, and other potential attractants (human urine, stable fly faeces), as well as guiacol, creosol (potential repellents), were tested as baits for biting flies ... -
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 ... -
Two Lignans Derivatives and Two Fusicoccane Diterpenoids From the Whole Plant of Hypoestes Verticillaris (L.f.) Sol. Ex Roem. & Schult
(University of Nairobi, 2019)Bioassay-guided screening of Hypoestes verticillaris whole plant CH2Cl2:MeOH (1:1) extract for anti-plasmodial activity yielded four new compounds: two lignans 2, 6-dimethoxysavinin (1), 2,6-dimethoxy-(7E)-7,8-dehydrohel ... -
Two New Antiprotozoal 5-Methylcoumarins from Vernonia brachycalyx
(Department of Chemistry, 1997)Two new isomeric 5-methylcoumarins, 2‘-epicycloisobrachycoumarinone epoxide (1) and cycloisobrachycoumarinone epoxide (2), have been isolated from the roots of Vernonia brachycalyx by means of bioactivity-guided fractionation. ... -
Two new flavonoids from Dracaena usambarensis Engl.
(University of Nairobi, 2020)Investigations of the root extract of Dracaena usambarensis Engl. for anticancer principles led to the characterization of one new homoisoflavonoid, (3S)-3,4ʹ,5,6-tetrahydroxy-7-methoxyhomoisoflavanone (1) and a new ... -
Two new Graminicolous Meliolaeae from Kenya
(Department of Botany, College of Biological and Physical Sciences, University of Nairobi, 2001) -
Two new isoflavones from millettia dura
(Department of Chemistry, University of Nairobi,, 2010)The genus Millettia belongs to the family Fabaceae. It is represented by more than 200 species and is, found widely distributed in tropical Africa, Australia and Asia. Previous chemical investigationsof a number" of ... -
Two new labdanes from aframomum sulcatum
(Department of Chemistry, University of Dschang,Department of Chemistry, The University of GlasgowDepartment of Organic Chemistry 2, Chemical Center, Lund University,, 2000) -
Two new species of Meliola from Kenya
(1999)Meliola periplocae and M warburgiae are described and illustrated in this study from collections on Periploca linearifolia and Warburgia ugandensis respectively. Periploca is a new host genus for Meliola, and M warburgiae ... -
Two new species of Plectranthus L
(University of NairobiCollege of biological and physical science, 2000)Vegetative propagation studies were carried out at Maseno University, Kenya in the year 2004 and 2005 using stem cuttings on three endangered indigenous tree species namely Asystasia schimperi, Carissa edulis and Toddalia ... -
Two novel lignans derivatives and two fusicoccane diterpenoids from whole plant of Hypoestes verticillaris (L.f.) Sol. ex Roem. & Schult
(University of Nairobi, 2019)Bioassay-guided screening of Hypoestes verticillaris whole plant CH2Cl2:MeOH (1:1) extract for anti-plasmodial activity yielded four new compounds: two lignans 2, 6-dimethoxysavinin (1), 2,6-dimethoxy-(7E)-7,8-dehydrohel ... -
Two phosphoglycoproteins (phosvitins) from Kinixys erosa oocytes
(Department of Biochemistry, University of Nairobi, 1992)1. Two phosphoproteins have been isolated from maturing egg yolks of Kinixys erosa by a combination of gel filtration and anion exchange chromatography. 2. The two proteins, TEYP-2 and TEYP-3, have View the MathML ... -
Two polymethoxylated flavonoids with antioxidant activities and a rearranged clerodane diterpenoid from the leaf exudates of Microglossa pyrifolia
(University of Nairobi, 2014-12)Three novel compounds; two polymethoxylated flavonoids, 5,7,4′-trihydroxy-3,8,3′,5′-tetramethoxyflavone (1), 5,7,3′-trihydroxy-3,8,4′,5′-trimethoxyflavone (2), and a clerodane diterpenoid; 8-acetoxyisochiliolide lactone ... -
Two prenylated flavonoids from the stem bark of Erythrina burttii
(Department of Chemistry, 2003-06)From the stem bark of Erythrina burttii, a new isoflavone, 5,2′,4′-trihydroxy-7-methoxy-6-(3-methylbut-2-enyl)isoflavone (trivial name, 7-O-methylluteone) and a new flavanone, 5,7-dihydroxy-4′-methoxy-3′-(3-methylbutadie ... -
Two relaxation time model for orientational motion of molecules in a gas reservoir
(Department of Physics, University of Nairobi, Nairobi, Kenya, 1976)A classical treatment of a two relaxation time model is presented, and it is shown from a solution of the general initial value problem that the Debye relaxation rate is equal to the rate of angular momentum relaxation. -
Two Stage Interest Rate Pass Through In Kenya
(School of Business, University of NairobiSchool of Mathematics, University of Nairobi, 2013)Interest rate volatility is a major concern for emerging economies due to its crippling effects on the economy. There is wide ranging disconsensus on the effectiveness and speed of various tools. This paper proposes ... -
Two stage woth unequal a-prior probabilities
(School of Mathematics, 1984)This paper aims at working out economic groupscreening plans to sort out defective items from a population which consists of tems with unequal a-priori probabilities of being defective. It is shown that in the case of ... -
Two sympatrics potted gum species are molecular lyhomogeneous
(SpringerCentre for Biotechnology and Bioinformatics, 2010)Large fruited spotted gum eucalypt Corymbia henryi occurs sympatrically with small fruited spotted gum Corymbia citriodora subspecies variegata over a large portion of its range on the east coast of Australia. The ... -
Two unusual rotenoid derivatives, 7a-O-methyl-12a-hydroxydeguelol and spiro-13-homo-13-oxaelliptone, from the seeds of Derris trifoliata
(Department of Zoology, University of Nairobi,Department of Chemistry, University of NairobiInstitut für Chemie, Universität Potsdam, P.O. Box 601553, D-14415 Potsdam, Germany, 2006-05)The crude methanol extract of the seeds of Derris trifoliata showed potent and dose dependent larvicidal activity against the 2nd instar larvae of Aedes aegypti. From this extract two unusual rotenoid derivatives, a ...
