PhD Theses: Department of Department of Physical Sciences
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Effect of microbial biocementation on physicochemical And mechanical properties of mortar Made from portland cements
(Daniel Karanja Mutitu, 2020-11)Microorganisms in soil and water play a significant role in physico-chemical and mechanical properties as well as the durability of building materials. The microorganisms can either contribute to the improvement or ... -
Formulation and Characterization of Prototype Particleboards using selected Crop Residue and Starch from Cassava Peels as a Binder
(University of Embu, 2020-11)Particleboards are formulated from lignocellulose material bound with adhesives. Conventional lignocellulose material used is wood particles and adhesive is formaldehyde-based resin. Due to reduction of tree cover, wood ... -
The Role of Seagrass Meadows in Gazi Bay, Kenya as Carbon Sinks
(Edinburgh Napier University, 2017-04)Ongoing work on the ‘blue carbon’ has established that vegetated coastal ecosystems – mangroves, seagrasses and tidal marshes – are exceptionally powerful natural carbon sinks. Hence, there are important applied arguments ... -
Extraction of Copper Using Chicken Dung and Concentration of Titanium Using Biomass from Ores in Maragwa Location, Tharaka Nithi County
(University of Embu, 2020-02)Mineral data shows several deposits of copper and titanium minerals in Kenya yet the country continues to import copper and titanium products. In some regions of Tharaka Nithi County, occurs ores that are known to contain ... -
Effects of Selected Media on Novel Portland Pozzolana Cement
(Kenyatta University, 2009-02)Cement is subject to degradation by aggressive media found in the environment. Durability tests are therefore necessary for any cementitious material in a given environment. The work reported in this thesis involved the ... -
Design, Fabrication and Characterization of an appropriate Solar Thermal Electricity Generating System
(Jomo Kenyatta University of Agriculture and Technology, 2015-07)The sun provides an abundant and clean source of energy. However the supply of this energy is periodic following yearly and diurnal cycles, intermittent, unpredictable and it is diffused. Its density is low compared to the ... -
Studies on Potassium requirements for maize in Nyamira County, Kenya
(2015-03)In Kenya, Maize is a key cereal crop and a major staple food in most Kenyan families. Most maize farmers mainly apply nitrogenious and phosphorous fertilizers to improve on maize yields in the country and Nyamira county ...
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