Browsing Faculty of Science & Technology (FST) by Title
Now showing items 4083-4102 of 4283
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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 ... -
Typhlodromalus aripode leon (acari: phytoseiidae) development and reproduction on major cassava pests at different temperatures and humidities: an indication of enhanced mite resilience
(2014)Both prey type and abiotic conditions limit performance of phytoseiid predators. The exotic predatory mite, Typhlodromalus aripo developed and reproduced when maintained on eggs and active stages of the cassava ... -
Ultrasensitive detection of plant hormone abscisic acid-based surface-enhanced Raman spectroscopy aptamer sensor
(University of Nairobi, 2022-03)Abscisic acid (ABA), as the most common plant hormone in the growth of wheat, can greatly affect the yield when its levels deviate from normal. Therefore, highly sensitive and selective detection of this hormone is greatly ... -
Ultrasensitive immunosensor for multiplex detection of cancer biomarkers carcinoembryonic antigen (CEA) and yamaguchi sarcoma viral oncogene homolog 1 (YES1) based on eco-friendly synthesized gold nanoparticles
(University of Nairobi, 2023)Cancer is one of the most extensive diseases with the highest mortality rate, accounting for almost 10 million deaths in 2020. The most common cancers are breast, lung, colon and rectum and prostate cancers. Of these, lung ... -
Ultrasonic attenuation in Kenyan clay refractories
(Department of Physics, University of Nairobi,, 1999)Ultrasonic attenuation in clay refractories fabricated under different processing parameters has been measured. It was established that refractory clay samples with high compaction efficiencies (CE) were less attenuating ...