Journal Articles (PAS): Recent submissions
Now showing items 1-20 of 277
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Development of a Traceability Model for Geographical Origin of Kenya’s Black Teas Based on Principal Component Analysis of FTIR and UV-Vis Spectral Data
(INTERNATIONAL JOURNAL OF RESEARCH AND INNOVATION IN APPLIED SCIENCE (IJRIAS, 2025)Authentic tracing of the origins of black tea is important in the tea market as this helps to extrapolate the quality and thus prices. Tasting on its own can be a misleading test for tea quality and origin tracing since ... -
Electrophoretic Deposition of TiO2/Nb2O5 Composite Electrode Thin Films for Photovoltaic Application
(Journal of Energy and Power Engineering, 2014)Nano sized powders of TiO2 (titanium dioxide) and Nb2O5 (Niobium (V) oxide) were used to fabricate TiO2/Nb2O5 composites thin films by EPD (electrophoretic deposition) technique. The metal oxide powders, together with ... -
Effect of Process-Related Parameters on Band Gap of Electrophoretically Deposited TiO2/Nb2O5 Composite Thin Films
(Africa Journal of Physical Sciences, 2014)Nano-crystalline composite thin films of titanium dioxide and niobium (v) oxide (TiO2/Nb2O5 ) were successfully deposited on fluorine doped tin oxide (FTO) coated glass substrate using electrophoretic deposition (EPD) ... -
Electrophoretic Deposition and Characterization of TiO2/Nb2O5 Composite Thin Films for Dye Sensitized Solar Cells
(Journal of Materials Physics and Chemistry, 2018)In this study, Electrophoretic Deposition (EPD) technique was used to fabricate TiO2/Nb2O5 composite thin films on FTO coated glass for application as photoelectrodes in Dye Sensitized Solar Cells (DSSC). A TiO2/Nb2O5 ratio ... -
Effects of Varying Growth Temperature on Optical and Structural Properties of Iron-doped Zinc Oxide Nanoparticles
(Nanoscience and Nanotechnology, 2025)Iron-doped zinc oxide nanoparticles (Fe: ZnO NPs) have gained attention in biomedical fields due to their tunable optical properties and potential as biomedical agents. However, the influence of growth temperature on ... -
Effects of Glutathione Concentration Used as a Capping Agent on the Structural, Optical, and Photoluminescence Properties of Fe: ZnO NPs
(American Journal of Condensed Matter Physics, 2025)Glutathione (GSH) capped Iron-doped zinc oxide nanoparticles (GSH-Fe: ZnO NPs)at varying GSH concentrations (0.002, 0.004, 0.006, 0.008, 0.01, 0.012, 0.014M) were successfully synthesized through sol-gel route to study their ... -
Optimization Of Ph, Time, Yeast Substrate Ratio And Temperature For Production Of Bioethanol From Sweet Potato (Ipomoea Batatas) Peels
(IOSR Journal of Applied Chemistry (IOSR-JAC), 2025)Introduction: The growing demand for renewable energy has led to increased interest in bioethanol production from non-food biomass. Sweet potato (Ipomoea batatas) peels, an agro-industrial waste, present a viable feedstock ... -
Influence Of Hydrochloric Acid Concentration On Reducing Sugar Yield And Fermentation Ph In Sweet Potato Peels Hydrolysis
(IOSR Journal of Applied Chemistry (IOSR-JAC), 2025)Introduction: Acid hydrolysis remains one of the most effective methods for converting starchy and lignocellulosis feedstocks into fermentable sugars as compared to physical and thermal methods. This study determines the ... -
Synthesis and characterization of Ag-ZnO using citrus reticulata peel extract
(Mater. Res. Express, 2025)To minimize the use of fossils fuels, solar cells have been considered to be effective despite facing major setbacks such as its cost and effectiveness. In this research Ag-ZnO was synthesized using Citrus reticulata as ... -
Structural and Optical Properties of Fe Doped Tio2 Nanoparticles: Investigation of Effects of Different Doping Concentration
(Advances in Materials, 2024)Fe-doped TiO2 nanoparticles (F-T NPs) were synthesized using the sol-gel method where different molar concentrations (0, 1, 2, 3, 5, 7, 9, and 10%) of Iron (iii) nitrate were added to a constant amount of the metal precursor ... -
Removal Of Phenolic Compounds From Aqueous Media Using Triethylamine Anchored Rice Husks
(IOSR Journal of Applied Chemistry (IOSR-JAC), 2024)Phenolic compounds in water are contaminants of concern even at low concentrations. They get incorporated in water from various sources such as industrial, mining and natural sources. Natural sources of phenolic compounds ... -
Proximate Analysis and Physicochemical Properties of Oil from Four Avocado Cultivars from Murang’a County, Kenya
(American Journal of Chemistry, 2025)Avocado has a high nutritional value with a high content of unsaturated fatty acids, vitamins, phytochemicals, fiber, protein, and minerals such as magnesium and potassium. However, it is difficult to determine the ... -
Human Health Effects Associated with Aluminium Poisoning and Remediation
(African Journal of Pure and Applied Sciences, 2025)Aluminium is a common element available on the earth’s surface mostly in combined form. It has numerous applications in many areas of everyday life. Aluminium has relatively superior metallic characteristics such as good ... -
Effects of Tin Doping Concentration on the Structural and Optical Properties of Cadmium Oxide Nanoparticles
(Advances in Materials, 2025)Wet chemical process was successfully used to synthesize tin doped and undoped cadmium oxide nanoparticles. Cadmium acetate, sodium hydroxide, mercaptopropionic acid and tin chloride were used as starting materials for ... -
Effects of Growth Temperature on the Structural and Optical Properties of Synthesized Titanium Dioxide Nanoparticles
(American Journal of Materials Science, 2024)The nanoparticles (NPs) of titanium dioxide (TiO2) were synthesized using sol-gel method. This method was preferred as it gives NPs with uniform particle size, surface properties, control of reaction time and temperature, ... -
Effects of Different Zn Doping Concentration on the Optical and Structural Properties of TiO2 Nanoparticles
(Nanoscience and Nanotechnology, 2024)Zn-doped TiO2 nanoparticles (Z-T NPs) were successfully synthesized using the sol-gel method. Titanium isopropoxide, ethanol, and diethanolamine were used in the ratio of 1:6:1 as the metal precursor, solvent precursor, ... -
CONCENTRATION OF LATERITES USING BIOMASS
(Kenya Industrial Property Institute, 2015-06)A method of concentrating iron in laterites to make the iron extraction process economical is disclosed. Concentration using biomass yields higher levels of iron by using appropriate ratio of biomass: laterites. The ... -
A Comprehensive Review On Pesticides: Classifications, Sources, Impacts, And Analytical Methods
(IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), 2025)Background: Pesticides are synthetic compounds that are widely used to control pests, insects, and weeds in various settings. They are classified into organophosphates, carbamates, pyrethroids, neonicotinoids, and ... -
Effects of Psidium guajava Extract on Optical and Structural Properties of Tin Oxide Nanoparticles
(American Journal of Materials Science, 2025)Nanotechnology has become the most promising area of research with its application in various fields of science such as solar cell. Metals and metal oxide nanoparticles (NPs) are mainly synthesized by chemical methods that ... -
Heavy Metal Concentration Levels in Some Selected Fish from Lake Turkana, Kenya
(International Journal of Research and Analytical Reviews (IJRAR), 2025)Heavy metal pollution in water poses a risk to both drinking water and fish consumed by people. This study aimed to assess how various heavy metals are distributed among different fish species. The study measured the levels ...