School of Pure and Applied Sciences: Recent submissions
Now showing items 21-40 of 170
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On quantiles estimation based on stratified sampling using multiplicative bias correction approach.
(Journal of Mathematics, 2022)In the context of stratified sampling, we develop a nonparametric regression technique to estimating finite population quantiles in model-based frameworks using a multiplicative bias correction strategy. Furthermore, the ... -
Estimating a Finite Population Total using a Density Function
(Eurasian Bulletin of Mathematics, 2021-05-02)An improved method for finite population total estimation is proposed using a multiplicative semi-parametric bias reduction density function. The density is first applied to estimate a non-parametric regression model which ... -
The genus Relicinopsis is nested within Relicina (Parmeliaceae, Ascomycota).
(British Lichen Society, 2017)Macro-morphological features traditionally used to segregate genera in Parmeliaceae have been shown to be highly plastic, placing limits on their taxonomic value. Here we aim to elucidate the evolutionary relationships of ... -
Bias Correction Technique for Estimating Quantiles of Finite Populations under Simple Random Sampling without Replacement
(Open Journal of Statistics, 2021-10)In this paper, the problem of nonparametric estimation of finite population quantile function using multiplicative bias correction technique is considered. A robust estimator of the finite population quantile function based ... -
Two new genera in the Magnaporthaceae, a new addition to Ceratosphaeria and two new species of Lentomitella
(Taylor & Francis, 2008)Ceratosphaerella is described as a new genus for C. castillensis and C. rhizomorpha. The genus is related to Ophioceras but distinguished by ascomata with a basal stroma and shorter, fusiform ascospores. Muraeriata is ... -
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 ... -
Establishment of an efficient screening system to isolate rice mutants deficient in green leaf volatile formation
(Taylor & Francis, 2011)Green leaf volatiles (GLVs) are involved in defense responses of plants against wide range of stresses. In order to investigate the ecological significances of GLVs in rice plants, we started screening of rice mutants that ... -
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 ... -
The importance of lipoxygenase control in the production of green leaf volatiles by lipase-dependent and independent pathways
(Frontiers in Plant Science, 2014)Green leaf volatiles (GLVs) are six-carbon volatile compounds. They are formed from fatty acids by a dioxygenation reaction catalyzed by lipoxygenase and a subsequent cleavage reaction catalyzed by hydroperoxide lyase. GLVs ... -
E-2-hexenal promotes susceptibility to Pseudomonas syringae by activating jasmonic acid pathways in Arabidopsis
(Frontiers in Plant Science, 2013-04)Green leaf volatiles (GLVs) are C6-molecules – alcohols, aldehydes, and esters – produced by plants upon herbivory or during pathogen infection. Exposure to this blend of volatiles induces defense-related responses in ... -
Two new genera in Magnaporthaceae, a new addition to Ceratosphaeria, and two new species of Lentomitella
(2008)Ceratosphaerella is described as a new genus for C. castillensis and C. rhizomorpha. The genus is related to Ophioceras but distinguished by ascomata with a basal stroma and shorter, fusiform ascospores. Muraeriata is ... -
A molecular phylogenetic reappraisal of the Hysteriaceae, Mytilinidiaceae and Gloniaceae (Pleosporomycetidae, Dothideomycetes) with keys to world species.
(PubMed, 2009)A reappraisal of the phylogenetic integrity of bitunicate ascomycete fungi belonging to or previously affiliated with the Hysteriaceae, Mytilinidiaceae, Gloniaceae and Patellariaceae is presented, based on an analysis of ... -
A new species of Melanochaeta from Kenya
(Verlag Ferdinand Berger & Söhne Ges.m.b.H., 2008)Melanochaeta taitensis is described as a new species from Kenya. It is distinguished from the other known species of Melanochaeta by having large, 3-septate, strongly curved ascospores. Phylogenetic analyses of nuclear 28S ... -
Parallel evolution of hysterothecial ascomata in ascolocularous fungi (Ascomycota, Fungi).
(The Natural History Museum, 2009-12-01)Ascoma morphologies have traditionally been used to classify filamentous ascomycete fungi. Phylogenies generated using DNA sequence data have since shown most of the previously identified groups not to be monophyletic. The ... -
Two new xylariaceous species from Kenya
(Mycotaxon, 2009)A survey of wood rotting ascomycetes in Kenya produced taxa in Biscogniauxia and Kretzschmaria that did not match descriptions of any known species and are hereby described as new species. The species of Biscogniauxia ... -
Multigene phylogeny of the Coronophorales (ascomycota): morphology and new species in the order.
(PubMed, 2009)The phylogenetic relationships within Coronophorales have been debated because of uncertainty over the taxonomic usefulness of characterisitics such as quellkörper, number of ascospore appendages, presence of subiculum and ... -
New Records of Lichen-forming Fungi from Kenya
(Journal of East African Natural History, 2012) -
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 ... -
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 ... -
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 ...