Browsing School of Science, Technology and Engineering by Title
Now showing items 74-93 of 116
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Laboratory Mix Design of Cold Bitumen Emulsion Mixtures Incorporating Reclaimed Asphalt and Virgin Aggregates
(2018-12-10)Bitumen emulsion asphalts, especially those incorporating marginal and secondary aggregates, are energy efficient, environment friendly, and sustainable alternatives to hot-mix asphalts. This study set out to compare ... -
Larviciding potency of water and ethanol extracts of Phytolacca dodecandra (L’ Herit) on Anopheles gambiae (Diptera: Culicidae)
(BIO publisher, 2015)Introduction: Plant extracts are an attractive target for search of effective malaria vector control agents. The reason for this is that they present a cost effective, target specific and bio-degradable insecticides. The ... -
Macroinvertebrate-based Index of biotic integrity (M-IBI) for monitoring the Nyando River, Lake Victoria Basin, Kenya
(Academic journal, 2009-12)A macroinvertebrate-based Index of Biotic Integrity (M-IBI) was developed to monitor ecological integrity of the Nyando River and its tributaries. Macroinvertebrates were sampled with a scoop net between September and ... -
Malnutrition and cachexia among cancer out-patients in Nairobi, Kenya
(JOURNAL OF NUTRITIONAL SCIENCE, 2017)Cancer is the third leading cause of death in Kenya. However, there is scarce information on the nutritional status of cancer patients to guide in decision making. The present study sought to assess the risk of malnutrition, ... -
Microbial community analysis in a combined anaerobic and aerobic digestion system for treatment of cellulosic ethanol production wastewater
(2015-06-22)This study investigated the microbial diversity established in a combined system composed of a continuous stirred tank reactor (CSTR), expanded granular sludge bed (EGSB) reactor, and sequencing batch reactor (SBR) for ... -
Micronutrient Zinc Deficiency as a Possible Co-factor in the Transmission and Progression of HIV/AIDS in Kenya
(2004)Thirty-four HIVIAIDS patients at various stages of disease progression volunteered to manage their ealth using a nutritional supplement that contained several micronutrients that included a 15 mg daily dose of elemental ... -
Modelling the Deflection of Reinforced Concrete Plates Using the Symplectic Method
(Journal of Sustainable Research in Engineering, 2020)This work aims to predict the flexural behavior of reinforced concrete slabs by combining a smeared finite element model derived from fracture mechanics for the simulation of the decline in the flexural rigidity of the ... -
Mycorrhizal Development and Phosphorus Concentration in selected Kenyan Sorghum Cultivars
(2015-08-19)This study was carried out on sorghum genotypes that exhibited significant difference in growth and production on P-deficient soils. The objective was to find out if the genotypes developed different levels of mycorrhizal ... -
Nutritional Characteristics of Rice (Oryza sativa L.) Composite Flours Obtained by Food Fortification
(European Journal of Agriculture and Food Sciences, 2021)High prevalence of protein-energy malnutrition among the vulnerable population, especially children has prompted research on fortification of common staple cereal foods such as rice. However, rice has inferior nutritional ... -
On (n, m)-Metrically Equivalent Operators
(International Journal of Mathematics And its Applications, 2021)In this paper, we introduce the class of (n,m)-metrically equivalent operators which is a generilazation of metrically equivalent operators and n-metrically equivalent operators. We then look at some properties of this ... -
On class (n, mBQ) Operators
(World Journal of Advanced Research and Reviews, 2021-06-26)In this paper, we introduce the class of (n, mBQ) operators acting on a complex Hilbert space H. An operator if T ∈ B (H) is said to belong to class (n, mBQ) if T ∗2mT 2n commutes with (T ∗mTn ) 2 equivalently [T ∗2mT 2n, ... -
On N-A-Metrically Equivalent and A-Metrically Equivalent Operators
(International Journal of Mathematics And its Applications, 2021)A-metrically equivalent operators may be regarded as a generalization of metrically equivalent operators. This is realized when A= I and T ]= T ∗ . Definition 1.1. Two operators S ∈ BA(H) and T ∈ BA(H) are said to ... -
On Numerical Range of Multiplication Operator
(International Journal of Mathematical Analysis, 2019)Let H be an infinite dimensional complex Hilbert space and A, B ∈ B(H) where B(H) is the C ∗ -algebra of all bounded linear operators on H. Let MAB : B(H) → B(H) be a multiplication operator induced by A and B defined ... -
On Skew Class (BQ) Operators
(Iconic Research and Engineering Journals, 2022-12)The class of Skew (BQ) operators acting complex Hilbert on an separable H is introduced in this paper. An operator if K ∈L (H) is said to belong to class Skew (BQ) if K commutes with a (BQ) operator, that ... -
Parameterized Empirical Potentials For BaF2 From Ab-Initio Methods Applied To The Study Of Superionic Transition Of C-BaF2
(Journal of Multidisciplinary Engineering Science and Technology (JMEST), 2018)Potentials for BaF2 have been generated from the ab-initio methods and tested to determine its applicability in classical dynamics. The minimization process for this force field was stopped at 17% where forces, ... -
Perception of Constructivist Learning Environment: Gender and School Type Differences in Siaya County, Kenya
(2014-12-17)Aims: The study aimed at investigating gender and school type differences in perception of Biology constructivist learning environment. Study Design: The study adopted a survey design. Place and Duration of Study: The ... -
Performance of CSTR–EGSB–SBR system for treating sulfate-rich cellulosic ethanol wastewater and microbial community analysis
(2017)Performance and microbial community composition were evaluated in a two-phase anaerobic and aerobic system treating sulfate-rich cellulosic ethanol wastewater (CEW). The system was operated at five different chemical ... -
Phylogenetic relationship among Kenyan sorghum germplasms based on aluminium tolerance
(2015-08-21)Eighty nine (89) sorghum lines sourced from various parts of Kenya were used to determine phylogenetic relationships based on 10 DNA fragments at AltSB loci with SbMATE, ORF9 and MITE primers. Nine lines of varying ... -
Physiological characterization of kenyan sorghum lines for tolerance to aluminium
(2015-08-21)Eighty nine Kenyan sorghum lines were screened for tolerance to aluminium toxicity in nutrient solution. Relative net root growth; root tip aluminium content and variation in organic acid exudation were used to determine ...
