George Amoako

University of Cape Coast | UCC · Department of Physics

The petroleum industries benefit immensely from developing scientific processes and procedures that determine characteristics of crude oils and distinct them. This is because crude oils are acquired from various geological sources and each sedimentary rock has its own distinct chemical properties that affect extraction, refinery and environmental s...

Developing scientific practices and procedures for finding the characteristics of various crude oils from different geological sources based on fluorescence spectra fingerprints would be beneficial to the petroleum industry. Laser-Induced Fluorescence (LIF) has gained relevance worldwide because of its advantages in crude oil analysis. Presently, t...

Qualitative and quantitative analyses of chemical elements in crude petroleum using energy-dispersive X-ray fluorescence spectroscopic technique has attracted the attention of scientific world because it is fast, cheap, non-destructive and assurance in quality compared to other methods. Metallic element characterisation of crude petroleum is import...

E. Gyan1*, S. Inkoom2, G. Amoako1 ¹Department of Physics, School of Physical Sciences, University of Cape Coast- Ghana 2Radiation protection institute, Ghana Atomic Energy Commission. Legon- Accra ABSTRACT Background: In diagnostic radiography, selection of kVp and mAs to produce acceptable image quality with a minimum dose has been a challenge...

Background: The basic challenge with conputed rediography (CR) systems is the large dynamic range which provides an opportunity for radiographers to gradually increase exposure factors and still produce good image quality, a practice that can lead to dose creep. Materials and Methods: The aim of this study was to establish the entrance skin dose (E...

Epithermal instrumental neutron activation analysis technique was applied in the determination of concentration levels of three halogens-bromine, chlorine, and iodine in Sarotherodon melanotheron (Blackchin tilapia). The species is a delicacy of the people of Komenda Edina Eguafo Abrem Municipality (KEEA) in the Central Region of Ghana, as such thi...

The amount of micronutrients in food is a key factor that determines the health status of a person. The concentrations of nine micronutrients, Sodium (Na), Magnesium (Mg), Chlorine (Cl), Potassium (K), Calcium (Ca), Vanadium (V), Manganese (Mn), Copper (Cu) and Iodine (I), in polished Jasmine 85 rice, locally cultivated in five rice farming areas i...

In brachytherapy treatment of the cervix, the tolerance of the normal tissue is often the limiting factor for the dose that can be delivered to the patient. The objective of this study is to determine the absorbed dose to the rectum in high dose rate brachytherapy of cervical cancer for empirical validation and system verification for patient treat...

The aim of this study is to design and fabricate a local anatomical water phantom for dose distribution measurements during high dose rate brachytherapy of the cervix. Phantoms for dosimetry are used when there is a need to simulate the conditions of a procedure to measure dose at certain points of interest. It is dangerous to place a human being i...

The aim of this study is to design and fabricate a local anatomical water phantom for dose distribution measurements during high dose rate brachytherapy of the cervix. Phantoms for dosimetry are used when there is a need to simulate the conditions of a procedure to measure dose at certain points of interest. It is dangerous to place a human being i...

The versatility of the DNA origami approach of organizing nanoparticles at the nanometer scale, together with thiol chemistry have been used. These approaches were used to design DNA origami structures and to functionalize them with gold nanoparticles after designing attachment sites on the DNA origami structures. In all two structures were designe...

Microbial bacteria in well-water have been treated using three different radiations and efficiency of treatment determined. The radiations were SUV (Sun with UV); SNoUV (Sun with NoUV, sun with UV portion filtered out) and LEDUV (radiations from LED source). Reduction in the Raman water peak at 526 nm and DOM fluorescence intensity at 550 nm indica...

In this review the interaction between femtosecond laser and matter with emphasis on silicon and some metals have been appraised. For silicon, spikes are produced as a result of interaction in the presence of background gas such as SF 6 , or H 2 S with an appropriate background pressure, but spikes are not formed in the presence N 2 or air. The for...

The coconut palm has a lot of uses including its use as composites and as fuels. In this work, we explored the use of a bomb calorimeter to determine the calorific values of coconut shells and coconut husks. A fixed sample mass of 0.05 kg has been used for both the shells and husks and burned in a bomb calorimeter for a duration of 5 minutes. Diffe...

The conventional treatment for carcinoma of the cervix is a combination of both the external Teletherapy and Low Dose-Rate (LDR) intracavitary brachytherapy. However, there has been an increasing trend toward the use of High Dose-Rate (HDR) brachytherapy, in combination with external beam radiotherapy (EBRT) in the treatment of cervix carcinoma.The...

During the operation of an x-ray machine, if the radiation protection of x-ray romm is insufficient, not only the patient but also clinical staff as well as public are exposed to high x-ray exposures. In this research work, leakage and scattered radiations were measured from x-ray machine in the radiography department of Cape Coast Teaching hospita...

The mean annual potential recharge rate to the ground water system in the Tarkwa gold mining district of South Western Ghana, has been estimated for the period 1977 to 2001 by analyzing precipitation recharge in response to rainfall pattern and distribution for the four main soil types; Huni, Tarkwa Phyllite, Banket and Kawere. Using the Hydrus-1D...

Polymer products have been applied in all spheres of life and their disposal after use has been a problem. In Ghana, non-biodegradable polymer products in the form of used water-sachet bags is littered everywhere. Coconut husk, which is a natural fiber, is also available as waste. We explore a means of recycling sachet-water bags and coconut husk t...

DNA origami technology provides a versatile approach for the chemical assembly of gold nanostructures. In this study the bottom-up approach of self-assembly using DNA in the origami process has been successfully applied to arrange five AuNPs asymmetrically. The DNA origami templates were modified to have binding sites that were extended with sticky...

This work made use of the strong interaction between biotin and streptavidin to connect designed DNA origami structures. The caDNAno software was used to design a 6 layer 3D origami cross-like structure. Selected DNA strands at the engineered attachment sites on the DNA origami structure were biotinylated. After folding of the origami structures, t...

The aim of the present paper is to assess some of the factors affecting on quality assurance of some conventional X-ray facilities such as reproducibility of tube voltage, dose output, X-ray tube consistency, accuracy of kVp, and half value layer. Examinations of these factors were studied using noninvasive kV meter of RMI 24A Multi-function meter....

Controlling matter at the nanoscale holds a lot of promise in nanotechnology. The DNA origami is promising if used as a template to design and arrange matter at the nanoscale. We have used the DNA origami approach to engineer staple strands at selected sites for attachment of gold nanoparticles. The covalent attachment of thiol-modified DNA oligome...

Fe doped TiO2 ceramic films were fabricated on carbon steel by plasma electrolytic oxidation. The microstructure of the film was characterised, and the photocatalytic activities of the films were evaluated. The results showed that the phases of the films were anatase TiO2 and Al2TiO5. The film surface was rough and porous. With increasing the treat...

For about three decades, DNA-based nanotechnology has been undergoing development as an assembly method for nanostructured materials. The DNA origami method pioneered by Rothemund paved the way for the formation of 3D structures using DNA self assembly. The origami approach uses a long scaffold strand as the input for the self assembly of a few hun...

Alumina ceramic coating was prepared on Q235 carbon steel by plasma electrolytic oxidation. The discharge process was analysed according to the voltage–time curve. The microstructure of the ceramic coating was investigated by scanning electron microscopy, X-ray diffractometry and energy dispersive X-ray spectroscopy. The bonding strength, thickness...

Formation of laser-induced periodic surface structures (LIPSS) during femtosecond laser ablation of highly oriented pyrolytic graphite (HOPG) is investigated. Using a 1 kHz femtosecond pulses (pulse width 130 fs, centre wavelength 800 nm) for micro-processing on HOPG, the calculated ablation threshold is 0.19 J/cm2. Two kinds of different periodic...

The rough micro- and nano- scale hierarchical structures on surfaces of materials render the surfaces superhydrophobic. In this context, we obtain both microscale grating structures and nanoscale induced structures (with some splashes) on silicon-based surfaces by means of laser etching and inducing. Our research focuses on the differences of morph...

In this article, we proposed a micro-punching process for microstructure on films based on laser driven-flyer induced spallation delamination phenomenon at the interface between a film and its substrate. To validate such a micro-punching process, a series of experiments were carried out for fabrication of microstructures on Au films coated on K9 gl...

Gold/Polyimide interfaces are prepared by depositing thin gold films onto polyimide with Si substrates and subsequently annealing at various temperatures. The interface is studied with the help of Rutherford backscattering spectroscopy. After deposition, different sample thicknesses exhibited different morphologies. High deposition rates resulted i...