Browsing School of Pure and Applied Sciences by Issue Date
Now showing items 61-80 of 170
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Deriving Penalized Splines For Estimation Of Time Varying Effects In Survival Data
(International Journal of Scientific & Technology Research, 2014)The major interests of survival analysis are either to compare the failure time distribution function or to assess the effects of covariate on survival via appropriate hazards regression models. Cox’s proportional hazards ... -
CLASSIFICATION RATES: NON-PARAMETRIC VERSES PARAMETRIC MODELS USING BINARY DATA
(Journal of Agriculture, Science and Technology, 2014)Estimations of the conditional mean and the marginal effects for particular small changes in the covariates have been of interest in financial, economics and even educational sectors. The standard approach has been to ... -
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 ... -
Assessment of Zinc Intake, Status and Influencing Factors in Kenya
(2015)Zinc (Zn) is vital for many biological functions and plays a crucial role in more than 300 enzymes in the human body (Brown & Wuehler 2002). The risk ... -
The influence of oxygen partial pressure on material properties of Eu3+-doped Y2O2S thin film deposited by Pulsed Laser Deposition.
(Elsevier B.V., 2015)Eu3+-doping has been of interest to improve the luminescent characteristics of thin-film phosphors. Y2O2S:Eu3+ films have been grown on Si (100) substrates by using a Pulsed Laser Deposition technique.The thin films grown ... -
Material Properties of RE-Doped Ln (Ln= Y, La) oxides and oxysulfides phosphors for red-emitting devices
(University of the Free State, 2015)Structural and optical properties of Eu3+-doped Ln (Ln=Y, La) oxide and oxysulfide nano crystals synthesized by sol-combustion method were analysed as a function of host to fuel ratio. Structural characterization shows ... -
Biochemical Characterization of Allene Oxide Synthases from the Liverwort Marchantia Polymorpha and Green Microalgae Klebsormidium Flaccidum Provides Insight into the Evolutionary Divergence of the Plant CYP74 Family
(Springer Berlin Heidelberg, 2015)Allene oxide synthase (AOS) and hydroperoxide lyase (HPL) mediate the formation of precursors of jasmonates and carbon-six volatiles, respectively. AOS and HPL utilize fatty acid hydroperoxides and belong to the plant ... -
Glutathionylation and Reduction of Methacrolein in Tomato Plants Account for Its Absorption from the Vapor Phase
(American Society of Plant Biologists, 2015)A large portion of the volatile organic compounds emitted by plants are oxygenated to yield reactive carbonyl species, which have a big impact on atmospheric chemistry. Deposition to vegetation driven by the absorption of ... -
On The Existence of a Non-Relativistic Hermitian Time Operator
(2015)The existence of a hermitian time operator is proposed in the framework of non-relativistic quantum mechanics. The Heisenberg equation of motion is shown to yield constant rate of flow of time. It is shown to yield results ... -
The monotypic genus Bulborrhizina belongs to Bulbothrix sensu lato (Parmeliaceae, Ascomycota)
(The American Bryological and Lichenological Society, Inc., 2015)The phylogenetic position of the monotypic genus Bulborrhizina is studied using molecular data from three loci (mtSSU, nuLSU and ITS) aligned with sequences from 95 other samples of parmelioid lichens. Bulborrhizina africana ... -
A Design Unbiased Variance Estimator of the Systematic Sample Means
(American Journal of Theoretical and Applied Statistics, 2015) -
On Estimation of Panel Data Regression Model in the Presence of Endogeneity and Heterogeneity
(International Journal of Mathematics & Computation, 2015) -
Investigating the Asymptotic Properties of Some Estimators for Panel Data Regression Model with Individual Effects
(International Journal of Statistics & Economics, 2015) -
CLASSICAL CONSTRUCTION OF ANGLES IN GENERAL
(International Journal of Mathematical Archive, 2016)The construction of angles in general is a classical problem in mathematics. The early mathematicians failed to redress the problem under the stated restrictions because they did not have a bearing to approach the problem ... -
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 ... -
Optical properties of ZnO nanoparticles synthesized by varying the sodium hydroxide to zinc acetate molar ratios using a Sol-Gel process.
(Springer, 2016)Material property dependence on the OH−/Zn2+ molar ratio of the precursor was investigated by varying the amount of NaOH during synthesis of ZnO. It was necessary to control the water content and temperature of the mixture ... -
Wide visible emission and narrowing band gap in Cd-doped ZnO nanopowders synthesized via sol-gel route.
(Elsevier Ltd., 2016)Cd doped ZnO nanopowder (Zn1−XCdXO, 0.15≤ X ≤0.45) has been synthesized by facile sol-gel method. The X-ray diffraction (XRD) shows the powder possess polycrystalline with hexagonal wurtzite structure of ZnO without formation ... -
Polyphyly of the genus Canoparmelia—uncovering incongruences between phenotype-based classification and molecular phylogeny within lichenized Ascomycota (Parmeliaceae)
(PHYTOTAXA, 2016)Many phenotypical features traditionally used to classify genera in Parmeliaceae and in lichens in general have evolved several times independently, potentially limiting their taxonomic utility. Here, we aim to elucidate ... -
Molecular data show that Hypotrachyna sorocheila (Parmeliaceae) is not monophyletic
(The American Bryological and Lichenological Society, Inc, 2016)Lichens that reproduce by means of vegetative propagules (soredia or isidia) are generally thought to have broad geographic distributions. However, recent studies have shown that some asexually reproducing lichens with ... -
Phylogenetic studies uncover a predominantly African lineage in a widely distributed lichen-forming fungal species
(MycoKeys, 2016)A number of lichen-forming fungal species are widely distributed. Here, we investigate biogeographic patterns in a widely distributed isidiate taxon –Parmelinella wallichiana – using molecular sequence data. Our results ...