Browsing by Author "Ngugi, Fidelis"
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Adsorption of Heavy Metals from Aqueous Solutions using Mangroves from Kenyan Coast
Ngugi, Fidelis (2015)In this study, adsorption of heavy metals (copper, lead, zinc and cadmium) from aqueous solutions was investigated using mangrove biomass from the Kenyan Coast. The efficacy of mangrove biomass on the removal of divalent ... -
Adsorption of Lead (II) Ions from Aqueous Solutions Using Mangroves Roots (Rhizophora Mucronata) Charcoal-Carbon Nanotubes Nanocomposite
Ngugi, Fidelis; Mwangi, Joel; Njagi, Eric; Ombaka, Ochieng (2021-02)Providing clean and affordable water to meet human needs is a grand challenge of the 21st century. Worldwide, water supply struggles to keep up with the fast growing demand, which is exacerbated by population growth, global ... -
Book of Proceedings of Tharaka University College 3rd Annual International Research Conference: Integrated Research Towards Sustainable Development Amidst Global Crises.
Veronica K., Nyaga; Levi, Musalia; Obote, Denis; Munanu, Shadrack; Kiptui, David; Ngugi, Fidelis; Simiyu, Justo; Kathuni, Edward.; Kiplangat, John; Kirugua, Joseph; Karuri, Mary; Moywaywa, Dickson; Wepukhulu, Miriam; Tuei, Kevin; Karema, Lydiah; Mwiti, Moureen; Micheni, Wendy; Rwanda, Alex; Gakii, Lydia; Elijah, Karonco; Gitonga, Collins M.; Mithika, Fredrick; Njeru, Moses M (2021-11-18)The justification of Tharaka University College Third Annual Research Conference was a determination of bringing together researchers to network, collaborate share expertise, knowledge and latest research experiences. The ... -
Efficacy of Mangrove (Rhizophora Mucronata) Roots Powder in Adsorption of Lead (II) Ions from Aqueous Solutions: Equilibrium and Kinetics Studies
Ngugi, Fidelis; Onyari, John M; Wabomba, John N (2016-08)The removal of Pb (II) ions by adsorption onto mangrove roots adsorbent was investigated in this present paper. The removal of lead ions from aqueous solutions was investigated in batch mode which involved the study of ... -
Equilibrium and Kinetics Studies for the Adsorption of Aqueous Cu (II) ions onto Mangroves Biomass
Ngugi, Fidelis (2013)In this study, adsorption of copper from aqueous solutions was investigated using mangrove biomass from the Kenyan Coast. The efficacy of mangrove biomass on the removal of copper (II) ions from aqueous solutions was ... -
Evaluation Of Mung Bean (Vigna Radiata) Varieties For Resistance To Bruchid (Callosobruchus Spp) Infestation Using The “No Choice Test"
Njiru, Silas; Muthengi, Alex M; Ngugi, Fidelis; Tende, Regina; Karimi, Rael (IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS), 2024-09)Mung beans (Vigna radiata) commonly known as green grams, are an important legume crop cultivated for food and as a source of income. Mung bean seeds are highly susceptible to infestation by bruchids (Callosobruchus spp), ... -
Evaluation of Selected Green Gram (Vigna Radiata) Varieties Against Insect Pests Infestation in The Field, Tharaka Sub-County, Kenya
Musyoki, Purity W; Wepukhulu, Miriam; Ngugi, Fidelis; Osoro, Eric K (2023-10)Background: Green grams farming plays a vital role in Tharaka and the country(Kenya) at large by ensuring food security, creating employment for rural households and greatly contributing to the national economy. However, ... -
Gamma ray spectrometric analysis and assessment of radiation hazards in soils of Mbeere North region, Kenya
Muya, Joyce W; Riara, Martin; Kamweru, Paul; Ngugi, Fidelis (Radiation Protection Dosimetry, 2024)This study used gamma ray spectrometry to determine the radiological safety of construction soil sampled randomly from MbeereNorth region, Kenya. The mean activity concentration of 232Th, 238U, and 40K was 149.7 ± 2.8 ... -
Metabolite Profiling of Mung Bean (Vigna radiata) Varieties Using UV-Vis Spectroscopy: A Tool for Breeding Resilience
Njiru, Silas; Muthengi, Alex M; Ngugi, Fidelis; Tende, Regina; Karimi, Rael (Acta Scientific NUTRITIONAL HEALTH, 2024)g beans (Vigna radiata L.), commonly known as green grams, are a vital legume crop with significant nutritional and eco nomic importance. As a resilient crop suited to arid and semi-arid conditions, mung beans contribute ... -
Optimization of Glycerol Production from Mango Seed Oil Using Response Surface Methodology and Central Composite Design
Muriithi, Daniel M; Muriithi, Dennis K.; Ngugi, Fidelis; Osoro, Eric K (2023-10)The objective of this research was to optimize the glycerol production from mango seed oil using RSM and CCD. The glycerol was produced through the transesterification process where biodiesel and glycerol were produced as ... -
Optimization of Glycerol Production from Mango Seed Oil Using Response Surface Methodology and Central Composite Design
Muriithi, Daniel M; Muriithi, Dennis K.; Ngugi, Fidelis; Osoro, Eric K (International Journal for Multidisciplinary Research (IJFMR), 2023-09)The objective of this research was to optimize the glycerol production from mango seed oil using RSM and CCD. The glycerol was produced through the transesterification process where biodiesel and glycerol were produced ... -
Proceedings of First Annual International Conference on The Role of Science, Technology, Innovation and Entrepreneurship in Sustainable Food Security and Development.
Nyaga, Veronica; Kiptui, David; Obote, Denis; Munanu, Shadrack K.;; Kiplagat, John; Gitonga, Kathuni; Njeri, Evah; Ngugi, Fidelis; Moywaywa, Dickson; Justo, Simiyu; Ndagara, Maureen; Njoroge, Alexander (2019-11-27)The rationale of the just concluded Tharaka University College 1 st Annual Research Conference was aimed at bringing together researchers to network, build collaborations and share their expertise and knowledge in ... -
Proceedings of second Annual International E-Conference on The Role of Science, Technology, Innovation and Entrepreneurship in Sustainable Development.
Nyaga, Veronica; Kipkorir, David K; Obote, Denis; Musalia, Levi M; Munanu, Shadrack K.;; Tuei, Kevin; Gitonga, Kathuni; Njeri, Evah; Ngugi, Fidelis; Moywaywa, Dickson; Justo, Simiyu; Ndagara, Maureen; Wepukhulu, Miriam; Vengi, Ambrose; Kangori, Timothy; Wephukulu, Miriam; Kanampiu, Patrick (2020-11-18)Welcome to Tharaka University College 2nd Annual International E- Research Conference. This is a Virtual Conference which has been necessitated by the COVID 19 Situation in the country. I am therefore delighted to ... -
Soil To Plant Transfer Factors of Natural Radionuclides in Khat (Catha endulis) from Igembe South Subcounty, Kenya.
Eliud, Elias M; Riara, Martin; Kamweru, Paul; Ngugi, Fidelis (International Journal of Engineering and Applied Physics (IJEAP), 2024-01)This study evaluated the soil to plant transfer factors of khat (Catha endulis) to determine the absorption potential of natural radionuclides. Soil and leaves of Khat were sampled from Igembe south subcounty, Kenya and ...