Research Papers/Topics in Applied Physics

Preparation of natural dyes from different plants as photosensitizer in modified SnO2 photoanode films for dye sensitized solar cell application

Abstract  The study focuses on the potential of naturally occurring dyes as photosensitizers in dye-sensitized solar cells (DSSCs). DSSCs are a type of solar cell that uses chemicals called photosensitizers to absorb energy from visible light and produce excited electrons. In 1991, Grätzel and his co-workers developed DSSCs, which have gained attention in recent years. However, the ruthenium-based compounds used as photosensitizers are expensive, and research suggests that organic dyes ...

Naturally Occurring Radionuclides present in some vegetable found in Owerri Imo State Nigeria

Naturally occurring radionuclide materials are usually absorbed by plants through their root systems as nutrients, which in turn pose a radiation risk to humans when they consume the plants as food. This study evaluated the radionuclide risks from naturally occurring radionuclides in samples of commonly consumed vegetables in Owerri. Gamma ray spectroscopy was used to analyze and profile the 226Ra, 232Th and 40K levels in the vegetable samples of African basil, water leaf, uziza leaf and bitt...

Naturally Occurring Radionuclides present in some vegetable in Owerri, Imo State, Nigeria

Naturally occurring radionuclide materials are usually absorbed by plants through their root systems as nutrients, which in turn pose a radiation risk to humans when they consume the plants as food. This study evaluated the radionuclide risks from naturally occurring radionuclides in samples of commonly consumed vegetables in Owerri. Gamma ray spectroscopy was used to analyze and profile the 226Ra, 232Th and 40K levels in the vegetable samples of African basil, water leaf, uziza leaf and bitt...

A MODEL OF NEUTRINO MASSES: GRAVITY-EMBEDDED WEINBERG OPERATOR

This paper investigates the propagation of neutrinos in a curved spacetime background. Following from this, we propose a novel mechanism for generating their masses via gravity-embedded Weinberg operator. This model arises from a hitherto unexplored interaction between gravitational field and the Majorana-neutrino fields. Two distinct methods, each, of calculating dimensionless gravitational couplings from a  gravitational field and spontaneous-symmetry-breaking mass-scale  of high-energ...

Applications of Computer On Airport Customs Station (Nigeria Customs Service) A Case Study Of Nnamdi Azikiwe International Airport Abuja

Many physical processes are expensive or impracticable to observe directly, and certainly they can only be observed in operation under conditions that actually exist. Almost any industrial process, almost any natural biological, physical, or social environment, and almost any large computing system is quite complex. Such as, building a large chemical plant based on a newly discovered sequence of reactions without knowing that it will work on a large scale much as it does in the laboratory wou...

Reported Incidence of Motor Cycle Crash in Agona Swedru Municipal Hospital

ABSTRACT Road traffic injuries among motorcyclists worldwide have persisted as a serious public health problem with much of the health burden in the developing countries especially the middle and low-income countries. This problem has not excluded Ghana which continually suffers from road traffic injuries and fatalities mainly caused by over speeding, non-adherence to road safety regulations (helmet usage) and poor enforcement of traffic regulations. The main aim of the study was to determin...

Design And Fabrication Of A Labview Automated Computer-Based Fire Fighting System

ABSTRACT Despite many building have firefighting systems installed in them; many people are still losing their lives and property due to fire accidents. The cost of installation of these systems is usually high and most of them are operated manually. They are often located inside the building which may not be accessible during fire accidents. In this research, an automatic cost effective prototype of a fire fighting system for the detection and control of fire has been designed and fabricated...

Mechanical, Thermal, Diffusion And Degradation Properties Of High Density Polyethylene ‘And’ Cellulose Blends

ABSTRACT Advanced technology in petrochemical based polymers has brought many benefits to mankind. However; it has become evident that the ecosystem is being disturbed because of non-biodegradable plastic materials. The environmental impact of persistent plastic wastes is growing into a more global concern. Currently, there is considerable interest in biodegradable polymers, which can be used as alternatives to traditional plastics, thus reducing the pollution caused by plastic wastes. The ma...

Radiometric Survey And Estimation Of Radiation Exposure From Archean Rocks: A Case Study Of Migori Gold Belt Complex, Kenya

ABSTRACT Natural radiation is the major source of external doses in our environment. Human exposure to high dose rates poses a health risk. In this research work, radiometric survey and dose rate assessment was carried out on Archean rocks within the gold belt mining complex of Migori, Kenya. The objective was therefore to find out the contribution of different Archean rocks to the ambient gamma-ray dose in the mining complex. The high-resolution gamma-ray spectroscopy NaI (TI) provided a sen...

A Comparative Study Of Antibiotic Resistance Profiles Among Enteric Bacteria In Broilers And Traditional Chicken From Selected Farms In Kericho, Kenya

ABSTRACT Antibiotic resistance is a growing concern for public and animal health. Threats to public health could come from the transfer of pathogens from animals to people via indirect contact such as through food or by direct contact with animals during handling process. Development and prevalence of antibiotic resistance of Salmonella and Escherichia coli strains is common. There is also acquisition of pathogenicity by the commensals. The purpose of the present study was to determine the pr...

Analysis Of Essential Trace Elements In Soils, Amaranthus Cruentus And Amaranthus Hypochondriacus Grains, Leaves And Stems From Selected Parts Of Kenya

ABSTRACT Kenya has been experiencing rising cases of diseases such as diabetes, tuberculosis, liver complications, HIV/AIDS among others. Management of these conditions can be enhanced by use of plant-based trace elements. There is a need therefore to investigate crops that can provide a cheap source of these essential immune boosting trace elements. Grain amaranth is grown in different parts of Kenya including Bureti, Mt Elgon, Bondo, Meru and Embu. However, little research has been reporte...

Assessment Of The Geothermal Potential Of Lake Baringo Area Using Magnetic Method

ABSTRACT Ground magnetic survey in Lake Baringo area was carried out to examine underlying geology in relation to anomalies in the magnetic field of the earth arising from the magnetic properties of subsurface lithology. This has been done to delineate areas associated with high temperature reservoir in the study area and establish if it relates with the occurrence of geothermal manifestations. The field stations were selected carefully along a profile in the study area and were positioned us...

Levels Of Selected Macronutrients In Varieties Of Pumpkin (Cucurbita Spp) Grown In Four Selected Districts In Lake Victoria Basin

ABSTRACT Lake Victoria Basin is one of the regions in sub-Sahara Africa which is densely populated and majority of the inhabitants are poor economically. Cases of diseases related to nutrient deficiency, child mortality, high HIV and AIDS have increased in the recent years due to malnutrition and undernourishment as the cost of basic foods have been on the rise. One way of reducing malnutrition is increased consumption of indigenous fruits and vegetables which offer variety of nutrients. The ...

Concentration Of Iron In Laterites From Different Localities Of Tunyai Division In Tharaka Nithi County In Kenya Using Magnetic Separation

ABSTRACT Iron is the single element used in industries in larger quantities than all the other metallic elements combined. This is because of the very wide applications of the metal in manufacture of machinery, vehicles, utensils, trains and train rails, ships and bars used in re-enforced concrete. Whereas the element occurs in more than 80 minerals, only a small number is important as a source of iron. However, even these must be concentrated to make them suitable for putting in a blast fur...

Pozzolan city, Compressive Strength And Ingress Of Selected Aggressive Ions In Kibwezi Bricks Based Cement

ABSTRACT The quality of cement as a binding material in building and construction depends on many factors. Among the most important is its resistivity to the aggressive environment and its strength. The most aggressive ions to reinforced concrete are Cland SO4 2- . This study investigated the diffusivity of these ions into mortar made from a mixture of ground calcined clay bricks from Kibwezi region (GB) vis-a-vis ordinary Portland cement (OPC) and Commercial Portland Pozzolana cement (PPC)....


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