Browsing Masters Theses:Department of Physical Sciences by Issue Date
Now showing items 1-8 of 8
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Low Cost Pozzolana based Cement from Industrial and Agricultural Waste Materials
(Kenyatta University, 2003-09)This thesis reports the results of a study aimed at making low cost cement from some agricultural and industrial wastes. The utilization of these wastes would avail an economical and environmentally friendlier waste ... -
Preparation and Properties of Long Afterglow CaAl2O4 Phosphors Activated by Rare Earth Metal Ions
(University of the Free State Republic of South Africa, 2011-11)This work comprises of several aspects of calcium-aluminate phosphor activated with rare earth metal ions i.e. (CaAl2O4:Eu2+, Nd3+, and Dy3+). In particular the luminescent and structural properties of the long afterglow ... -
Structure and Biomass Accumulation of Natural Mangrove Forest at Gazi Bay, Kenya
(Kenyatta University, 2013-08)Mangroves occupy only 0.4% of forested areas globally but are among the most productive ecosystems on earth. They account for about 11% of the total input of terrestrial carbon into the oceans. The above ground carbon ... -
Microplastic Abundance, Composition and Distribution in the Endorheic Lake Naivasha, Kenya
(University of Embu, 2020-10-28)Plastic pollution has recently gained global concern due to the negative effect it presents on both the environment and human health. In the environment, plastics degrade yielding millions of micro- and nano-scale plastic ... -
EFFECTS OF TEMPERATURE, DEFECT, AND ph ON PROPERTIES OF caal2o4: Eu2+, Dy3+ PHOSPHOR FOR LIGHTING APPLICATION
(Samuel Ndung’u Waithira, 2024-08)Electricity is the main source of energy used for lighting but still worldwide, a population of about 1.4 billion does not have any access to electricity, with 85 % of them coming from rural areas. Most of the people in ... -
Solid-liquid extraction of heavy metals in aqueous solutions using chelating ligands anchored on solid supports
(Ian Tharau Kabogo, 2024-08)The rapid surge of population growth has translated to an unprecedented increase in heavy metal pollution in the environment resulting from various anthropogenic activities. Their non-biodegradable nature, toxicity and ... -
SYNTHESIS OF LUMINESCENT sral2o4:Eu2+,Dy3+ NANOMATERIALS FOR EMERGENCY DISPLAYS
(Victor Saidi Kadenge, 2024-08)SrAl2O4:Eu2+,Dy3+ are phosphors with unique tuneable properties. This work comprises of several aspects of strontium-aluminate phosphor doped with rare earth metal ions (SrAl2O4:Eu2+,Dy3+). In particular the optical and ... -
Harnessing the nutraceutical properties, Microbial composition of scarabaeoid beetle Larvae and antibacterial compounds of its Endozoic fungus (aspergillus welwitschia)
(Sylviah Syombua Mwanza, 2024-08)The systematic development of antibiotic resistance poses huge worldwide health challenges, specifically in low- and middle- income countries (LMICs) increasing the treatment costs. There is heightened need to broaden the ...
