Browsing School of Pure and Applied Sciences by Title
Now showing items 138-157 of 170
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Spatial expression of the Arabidopsis hydroperoxide lyase gene is controlled differently from that of the allene oxide synthase gene
(Taylor & Francis, 2014-12-13)The hydroperoxide lyase (HPL) pathway for six carbon (C6) volatiles and the allene oxide synthase (AOS) pathway for jasmonates (JAs) share the first part of the pathway. To avoid competition, a separate localization of ... -
Stability of phytochemicals as sources of anti-inflammatory nutraceuticals in beverages—A review
(Elsevier, 2013)Recently phytochemical constituents have attracted a lot of interest as sources of functional ingredients in food product formulations. However, before being incorporated into foods or beverages the stability of these ... -
The state of cancer in Meru, Kenya: a retrospective study
(2019)It is projected that by 2030, 70% of all cancer related deaths will occur in low-middle income countries. However, data on the state of cancer in most African countries is scanty. Cancer estimates for Kenya are based on ... -
A structural investigation of the D2O solvated, acetone solvated and nonsolvated 1,4-Diazabicyclo[2.2.2]octane complexes of the half sandwich moiety [(η5-C5H5)(CO)2Fe]
(Sabinet, 2013)Two new solvates of the dinuclear salt {(η5-C5H5)(CO)2Fe}2(μ-DABCO)](BF4)2 (DABCO = 1,4-diazabicyclo[2.2.2]octane); 1 (D2O solvate) and 2 (acetone solvate), and the mononuclear salt [(η5-C5H5)(CO)2Fe(DABCO)]BF4, 3, have ... -
A STUDY OF A HYDRO MAGNETIC FLUID FLOW IN A ROTATING SYSTEM BOUNDED BY TWO PARALLEL PLATES
(Jomo Kenyatta University of Agriculture and Technology, 2013)An electrically conducting fluid flowing between two parallel plates has been considered in this study. The fluid flow is unsteady and a magnetic field is applied perpendicular to the plates. Various configurations have ... -
Study on the Effect of Thiobacillus Intermedius Bacteria on the Physico-Mechanical Properties of Mortars of Ordinary Portland Cement
(PubMed, 2020)Most of concrete structural failures are attributed to poor workmanship and poor engineering designs. Some microorganisms present in sewer systems can degrade the concrete and/or mortar. Concrete failures due to microbial ... -
Synergistic Evaluation of Selected Plant Extracts on Potency of Pyrethrins against the Maize Weevil, Sitophilus zea-mais (MOTSCH.)
(Merit Research Journals, 2020-11)The interest in utilization of botanical insecticides, particularly essential oils have become increasingly relevant in the control of insect pests. Many plant products and their bioactive compounds with repellent, antifeeding ... -
Syntheses and structural characterization of 2,4,6-trimethylaniline complexes of iron carbonyls
(Inorganica Chimica Acta, 2014)The new 2,4,6-trimethylaniline complexes [Cp∗Fe(CO)2(NH2C6H2(CH3)3)]+ (3) and [CpFe(CO)2(NH2C6H2(CH3)3)]+ (4) (Cp∗ = η5-C5(CH3)5; Cp = η5-C5H5) have been synthesized and isolated in high yields as tetrafluoroborate salts. ... -
Syntheses, structural elucidation and reactions of allylamino compounds of the type, [η5-C5R5(CO)2Fe(NH2CH2CHCH2)]BF4
(Pergamon, 2012)The reaction of 3-aminoprop-1-ene (allylamine) with the etherate complexes [(n5-C5R5)(CO)2Fe(L)]+(R = H; L = Et2O; R = CH3; L = THF) have been investigated and found to give air stable allylamino com-plexes [(n5-C5R5)(CO ... -
Synthesis and Characterization of Macrocyclic Polyether N, N′-Diallyl-7, 16-diaza-1, 4, 10, 13-tetraoxa-dibenzo-18-crown-6
(Multidisciplinary Digital Publishing Institute, 2016)In this study an efficient and direct production procedure for a macrocyclic polyether N,N 1 diallyl-7,16-diaza-1,4,10,13 -tetraoxa-dibenzo-18-crown-6 from the reaction of catechol and N,Nbis (2-chloroethyl)prop-2-en-1-amine ... -
Synthesis and characterization of Y2O3:Eu3+ phosphors using the Sol-Combustion method.
(Elsevier B.V., 2014)Y2O3: Eu3+ phosphor powders were prepared by the Sol-Combustion synthesis method using a sulfur-contained organic fuel in an ethanol–aqueous solution. The structural, morphological and optical properties of the as-prepared ... -
Synthesis, characterization and crystal structures of two polymorphs of the iodo-bridged ruthenium salt, μ-iodido-bis {η 5-cyclopentadienyl-dicarbonyl-ruthenium (II)} tetrafluoroborate
(Elsevier, 2013)The reaction of RpI (Rp = (η5-C5H5)Ru(CO)2) and AgBF4 in two different solvents, tetrahydrofuran and dichloromethane afforded two polymorphs of the iodo-bridged cationic complex [Rp2I]BF4. Polymorph I precipitates out of ... -
Synthesis, characterization and structural elucidation of water-soluble 1-aminoalkane and α, ω-diaminoalkane complexes of the pentamethylcyclopentadienyliron dicarbonyl cation,[Cp∗(CO) 2 Fe]+
(Elsevier, 2012)A series of water-soluble alkylaminopentamethylcyclopentadienyliron dicarbonyl complexes, [Cp∗(CO)2Fe{NH2(CH2)nCH3}]BF4 (n = 2–6; Cp∗ = η5-C5Me5) and the diaminopropane bridged complex, [{Cp∗(CO)2Fe}2{μ-NH2(CH2)3NH2}](BF4)2 ... -
Synthesis, characterization and structural elucidation of water-soluble 1-aminoalkane and α,ω-diaminoalkane complexes of the pentamethylcyclopentadienyliron dicarbonyl cation, [Cp∗(CO)2Fe]+
(Elsevier, 2012)A series of water-soluble alkylaminopentamethylcyclopentadienyliron dicarbonyl complexes, [Cp ∗ (CO) 2 Fe{NH 2 (CH 2 ) n CH 3 }]BF 4 (n=2–6; Cp ∗ =η 5 -C 5 Me 5 ) and the diaminopropane bridged complex, [{Cp ∗ (CO) 2 Fe} ... -
Temperature dependence of structural and luminescence properties of Eu3+-doped Y2O3 red-emitting phosphor thin films by pulsed laser deposition.
(Springer, 2016-02)Pulse laser deposition was used to obtain nanocrystalline red-emitting Y2O3:Eu3+ thin-film phosphors.X-ray diffraction measurements show that the un-annealed thin film was amorphous, while those annealed were crystalline.At ... -
A Theoretical Model of Corruption Using Modified Lotka Volterra Model: A Perspective of Interactions between Staff and Students
(Journal of Advances in Mathematics and Computer Science, 2020)Corruption is the misuse of power or resources for private gain. This undermines economic development, political stability, and government legitimacy, the society fabric, allocation of resources to sectors crucial for ... -
Thermal Resistivity of Chemically Activated Calcined Clays-Based Cements
(Springer, 2017)The study investigated the effects of selected potential chemical activators on thermal resistivity of calcined clay based cement mortars. 0.5 M Na2SO4 and 0.5 M NaOH were used as activator solutions. The chemical composition ... -
Thermal Stress Monitoring on Piston Rings by Real Time Holographic Interferometry
(Scientific Research Publishing, 2013)In this paper, real time holographic Interferometry (RTHI) technique was used to monitor the thermal stress on the piston rings. The piston rings holograms were recorded and the holographic plate replaced on the holder ... -
Trace Elements in Carbonated Cold Springs of Eastern Mt. Kenya, Meru County
(Journal of the Kenya Chemical Society, 2021)Carbonated spring waters are natural sources of trace minerals considered to have important biological and therapeutic functions. However, some trace elements are toxic to the human body upon exposure even at low concentration ... -
Tree Layer Dynamics under Different Land Uses and Soils in Semi-Arid Areas of Kenya
(2002)A study was conducted to characterize the main factors critical to the distribution of key wood species and quantify the effects of land use on the tree layer in a semi-arid area of Kenya. Units studied were small-scale ...