Browsing School of Pure and Applied Sciences by Title
Now showing items 213-232 of 259
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Reactivity, Characterization of Reaction Products and Immobilization of Lead in Water and Sediments using Quercetin Pentaphosphate
(RSC, 2016)Lead is currently ranked the number one heavy metal pollutant with maximum contaminant level (MCL) of 0.015 mg/L. The use of organicsolvent free methods to immobilize lead from the environment is attracting the attention ... -
Reconfigurable high-speed optical fibre networks: Optical wavelength conversion and switching using VCSELs to eliminate channel collisions
(Elsevier, 2017-01)We experimentally provide an alternative solution to channel collisions through upwavelength conversion and switching by using vertical cavity surface-emitting lasers (VCSELs). This has been achieved by utilizing purely ... -
A Reduced Form of the Three Factor Commodity Derivative Valuation Model
(Research India Publications, 2016)This study build a reduced form of three factor valuation model by explicitly taking into account the unobservable character of the convenience yield. The spot priceprocess,theinstantaneousconvenienceyieldandCIRinterestr ... -
Reduction and Degradation of Paraoxon in Water Using Zero-Valent Iron Nanoparticles
(MDPI, 2022-08-02)Paraoxon is an emerging organophosphate pollutant that is commonly used as a pesticide and a drug, hence increasing the risk of contamination of water supplies. Its intensive use for vector control has led to pollutions ... -
Reduction of Hexavalent Chromium Using Naturally-Derived Flavonoids
(American Chemical Society, 2012)Quercetin is a naturally occurring flavonoid that is known to form complexes with metals; a process that reduces the environmental availability of toxic metals such as chromium. We hereby report the first evidence of the ... -
Refined node polynomials via long edge graphs
(2015)The generating functions of the Severi degrees for sufficiently ample line bundles on algebraic surfaces are multiplicative in the topological invariants of the surface and the line bundle. Recently new proofs of this fact ... -
Regime-Switching Temperature Dynamics Model for Weather Derivatives
(Hindawi, 2018)Weather is a key production factor in agricultural crop production and at the same time the most significant and least controllable source of peril in agriculture. These effects of weather on agricultural crop production ... -
A residual-based bootstrap for functional autoregressions
(arXiv preprint, 2019)We consider the residual-based or naive bootstrap for functional autoregressions of order 1 and prove that it is asymptotically valid for, e.g., the sample mean and for empirical covariance operator estimates. As a crucial ... -
Residue levels and dis charge loads of antibiotics in waste water treatment plants (WWTPs), hospital lagoons, and rivers within Lake Victoria Basin, Kenya
(Environ Monit Assess, 2016)The detection of antibiotics in water systems has instigated great environmental concern due to the toxicological effects associated with these compounds. Their discharge into the environment results from the ubiquity of ... -
Residue levels and discharge loads of antibiotics in wastewater treatment plants (WWTPs), hospital lagoons, and rivers within Lake Victoria Basin, Kenya
(Springer International Publishing Switzerland, 2015-12)The detection of antibiotics in water systems has instigated great environmental concern due to the toxicological effects associated with these compounds. Their discharge into the environment results from the ubiquity ... -
A review of aquaculture production and health management practices of farmed fish in Kenya
(International Journal of Veterinary Science and Medicine, 2018)Warm water aquaculture is widely practiced in Kenya and is dominated by the culture of Nile tilapia (Oreochromis niloticus) (75% of total production) followed by African catfish (Clarias gariepinus) at 18%. Aquaculture ... -
Rhizons improved estimation of nutrient losses because of seepage in aquaculture ponds
(Journal of Earth Science & Climatic Change, 2017)The effects of climate change have highly challenged the productivity of the agricultural sector. The increasing temperatures and erratic rains, as well as diseases and pests have significantly reduced crop yields in the ... -
Risk factors for Aedes aegypti household pupal persistence in longitudinal entomological household surveys in urban and rural Kenya
(Springer Nature, 2020)Aedes aegypti is an efcient vector of several arboviruses of public health importance, including Zika and dengue. Currently vector management is the only available avenue for disease control. Development of efcient vector ... -
Robust Optimal Portfolio and Bank Capital Adequacy Management
(Research India Publications, 2018)The task of jointly estimating an optimal portfolio and bank capital adequacy ratio under model uncertainties is a real and challenging problem to portfolio managers in the banking industry. In this paper, we investigate ... -
Salary Determinants for Higher Institutions of Learning in Kenya
(2014)There has been a debate over the years on which category of salary determinants best predicts an employee salary, that is, whether it is organizational characteristics or individual attributes. This study adopts a hybrid ... -
Sediment Accumulation in Fish Ponds; Its Potential for Agricultural Use
(2014)ABSTRACT An experiment was conducted at the World Fish Center in Egypt, to describe and quantify sediment and nutrient accumulation in semi-intensive tilapia ponds, evaluate the effect of input type and stocking density ... -
A signal impairment-aware scheme for next-gen flexible spectrum in 10 Gb/s VCSEL metro-access optical fibre networks
(Elsevier, 2017-07)We experimentally characterized and optimized link performance of a multi-node flexible spectrum network. The cheap and low power consuming and wavelength tunable vertical cavity surface-emitting lasers (VCSELs) have ... -
Signal monitoring and performance stability evaluation tool in a high speed optical communication network
(Elsevier, 2016)The diverse communication systems in South Africa have changed drastically over the last few years and are envisioned to continue to improve as evidenced by the deployment of high speed optical fibre networks, in both ... -
A silver Nanoparticle/Poly (8-Anilino-1-Naphthalene Sulphonic Acid) Bioelectrochemical Biosensor System for the Analytical Determination of Ethambutol
(2011)Ethambutol (2S, 2′S)-2, 2′-(ethane-1, 2-diyldiimino) dibutan-1-ol) is a first-line antitubercular drug effective against actively growing Mycobacterium tuberculosis. Resistance of the mycobacterium to ethambutol among ...