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- Professor Nathaniel Owusu Boadi is a Professor at the Department of Chemistry, Kwame Nkrumah University of Science an... moreProfessor Nathaniel Owusu Boadi is a Professor at the Department of Chemistry, Kwame Nkrumah University of Science and Technology, Ghana. He holds BSc. Chemistry (Hons), MSc. Environmental Chemistry and PhD. Inorganic Chemistry degrees, all from the Kwame Nkrumah University of Science and Technology, Ghana. Professor Boadi worked as a research fellow at the University of Manchester, United Kingdom from July 2011 to December, 2013 where he worked under Professor Paul O’Brien, researching into novel single source routes to the synthesis of lead chalcogenide nanoparticles and thin films.edit
The study aimed to ascertain the levels of trace elements present in the face powders marketed in Ghana. Fifteen different brands of facial makeup powders were purchased from a local market in Ghana. The samples were analyzed using an... more
The study aimed to ascertain the levels of trace elements present in the face powders marketed in Ghana. Fifteen different brands of facial makeup powders were purchased from a local market in Ghana. The samples were analyzed using an X-ray fluorescence (XRF) analyzer to determine the concentrations of 16 elements (Pb, As, Hg, Zn, Fe, Mn, Cr, Ti, Cu, Ni, Co, Sb, Cd, Ag, Sn, and Au). The contents of the trace elements were ordered in the following descending order according to the maximum concentrations: Fe > Zn > Ti > Mn > Cr > Hg > As > Pb > Cu, Ni, Co, Sb, Cd, Ag, Sn, and Au. Pearson correlation statistics showed strong positive relationships between Pb and Zn (r = 0.71), Pb and Cr (r = 0.57), Hg and Zn (r = 0.63), Hg and Fe (r = 0.73), Hg and Cr (r = 0.61), Zn and Fe (r = 0.69), Zn and Cr (r = 0.88), Fe and Cr (r = 0.67), and Fe and Ti (r = 0.62). Except for Pb and Cr, all the other elements had their margin of safety (MOS) values less than 100. The hazard...
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Zinc sulphide (ZnS) is an important semiconductor with widespread electronic and catalytic applications. The growth kinetics of ZnS nanocrystals synthesized by the thermal decomposition of zinc ricinoleate carboxylates in an... more
Zinc sulphide (ZnS) is an important semiconductor with widespread electronic and catalytic applications. The growth kinetics of ZnS nanocrystals synthesized by the thermal decomposition of zinc ricinoleate carboxylates in an oleylamine:dodecanethiol (1 : 1) solvent mixture isreported. Crystalline sphalerite ZnS nanocrystals with quantum dot sizes of 2.3–5.3 nm were obtained at temperatures higher than 240°C. The p-XRD patterns showed a clear relationship between the crystallite sizes and the peak broadness at a temperature range of 250–300°C. The optical bandgap energies of the ZnS nanocrystals reduced from 4.27 eV to 3.73 eV as the time of reaction increased from 20 to 60 min at 250°C. The activation energy for the growth kinetics of the ZnS nanocrystals was determined to be 36.24 kJ/mol which compares closely to those reported in the literature for aqueous systems.
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Research Interests:
Introduction: Geophagia although pleasurable and somewhat a necessity among pregnant women, also comes along with its own attendant problems such as exposure to potentially hazardous substances like bacteria, fungi, helminthes and ova,... more
Introduction: Geophagia although pleasurable and somewhat a necessity among pregnant women, also comes along with its own attendant problems such as exposure to potentially hazardous substances like bacteria, fungi, helminthes and ova, radioactive materials, and toxic elemental minerals in the soil depending on the geographical location. Methodology: This study evaluated the potential health risk involved during the exposure of pregnant women to toxic elemental minerals via the consumption of clay as pica (geophagia). Elemental mineral analysis was carried out using Buck Scientific 210VGP Flame Atomic Absorption Spectrophotometer (Buck Scientific, Inc. East Norwalk, USA). Risk assessment methods were also used to ascertain the various risks factors and the overall risk level. Results: Concentrations of the macro elements investigated were 1.38 ± 1.5, 2.40± 1.5, 7.74± 1.5, 4.01± 1.0, 13.24± 2.2 and 13.76± 2.1 mg/Kg for Fe, Cu, Zn, K, Mg and Na respectively. While that for the micro e...
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Nickel sulfides have unique and diverse structural features, making them ideal for energy conversion and storage. This research focuses on the synthesis and characterization of nickel sulfide thin films and nanocrystals from nickel ethyl... more
Nickel sulfides have unique and diverse structural features, making them ideal for energy conversion and storage. This research focuses on the synthesis and characterization of nickel sulfide thin films and nanocrystals from nickel ethyl xanthate complex using spin-coating and solventless methods. The nickel ethyl xanthate complex (C6H10S4NiO2) was characterized using Fourier-transformed infrared (FT-IR), ultraviolet-visible (UV-Vis), and nuclear magnetic resonance (NMR) spectroscopies as well as thermogravimetric analysis (TGA). The NiS thin films and nanoparticles were analyzed with energy dispersive X-ray (EDX) spectroscopy and X-ray diffraction (XRD). Nickel ethyl xanthate was synthesized in an 81.2% yield. The bandgaps of the nickel sulfide obtained from the spin-coating method ranged from 4.35–4.88 eV. For the solventless method, the bandgap of the nickel sulfide ranged from 3.93–3.96 eV. The crystal phase observed from the spin-coating and solventless methods was α-NiS (hexag...
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An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely... more
An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Optimum fish production is greatly dependent on the physical, chemical and biological qualities of water. Hence, successful fish pond management requires an in-depth understanding of water quality. A study to assess heavy metal (Cr, Cd,... more
Optimum fish production is greatly dependent on the physical, chemical and biological qualities of water. Hence, successful fish pond management requires an in-depth understanding of water quality. A study to assess heavy metal (Cr, Cd, Mn, Pb and Zn) contamination and physicochemical parameters of water samples from eight selected fish ponds in Sunyani, Ghana, was conducted. The parameters included temperature, pH, salinity, total hardness, electrical conductivity (EC), chemical oxygen demand (COD) and biological oxygen demand (BOD). The results revealed detectable Mn and Zn levels in all the selected fish ponds; with Mn levels in three ponds being significantly higher than the World Health Organization (WHO) recommended limit (< 0.500 mg/L). Of the three samples, which showed detectable Cr and Cd levels, concentrations of two exceeded the permissible limits. Pb was below the detection limit in all the samples whilst Cu levels detected in two of the ponds were below the permissi...
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Research Interests:
Abstract The quality of drinking water is necessary for good health. In this study, twenty borehole drinking water samples were collected from homes and communities and assessed for their quality. The results indicated that 95 % of the... more
Abstract The quality of drinking water is necessary for good health. In this study, twenty borehole drinking water samples were collected from homes and communities and assessed for their quality. The results indicated that 95 % of the samples had pH values below the World Health Organization's (WHO) drinking water guidelines of 6.5-8.5. The pH values obtained ranged from 4.33-7.03. The other physicochemical parameters fell within the WHO's set limits for drinking water. The concentrations of the cations (Ca2+, Mg2+, Na+ and K+) fell within the WHO drinking water limits. About 55 % of the samples had nitrate concentrations above the WHO threshold, with concentrations ranging from 0.04 to 107.57 mg/L. The SO42−, PO43− and Cl− concentrations for the samples were within the WHO set limits. The water quality index calculated for the water samples was 54.25, indicating that the water samples were not safe to drink. Also, 85 % of the water samples were contaminated with both total and faecal coliforms, making them unsuitable for drinking.
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Dyes are usually present in trace quantities in the treated effluents of many industries. The effectiveness of adsorption for dye removal from waste waters has made it an ideal alternative to other expensive treatment methods. This study... more
Dyes are usually present in trace quantities in the treated effluents of many industries. The effectiveness of adsorption for dye removal from waste waters has made it an ideal alternative to other expensive treatment methods. This study investigates sorption properties of Tectona grandis, Ceiba pentandra and Terminalia superba sawdust for the adsorption of Vat Yellow-4, Vat Red-1 and Natural dyes in water bodies. Physical parameters of the wood sawdust and textile dye such as pH and moisture content were determined. The dye removal capacities of the various wood species were also calculated. The pH of the dyes and wood sawdust ranged from 5.93 to 9.47; and 5.06 to 8.59 respectively. The moisture content (%) also ranged from 3.00 to 4.00 with an average of 3.50. The dye removal percentage (%) by Tectona grandis, Ceiba pentandra and Terminalia superba wood sawdust were respectively found to range from 18.39 to 44.46, 9.24 to 46.65 12.66 to 63.56 for the adsorption of the various dye ...
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The leaves of Persea americana are widely used for ethno-medicinal purposes worldwide. This study assessed the antimicrobial and antioxidant activities of the methanol, ethyl acetate, chloroform and petroleum ether leaves extracts of P.... more
The leaves of Persea americana are widely used for ethno-medicinal purposes worldwide. This study assessed the antimicrobial and antioxidant activities of the methanol, ethyl acetate, chloroform and petroleum ether leaves extracts of P. americana. Extracts displayed variable antimicrobial activities that were microorganism-specific. The methanolic extract displayed the most potent antimicrobial activities with the largest zones of inhibition (0-1.8 mm) in the agar diffusion assay and with the lowest minimum inhibitory concentration (MIC) in the broth dilution assay against a panel of microorganisms that included Bacillus subtilis, Escherichia coli, Salmonella typhi, Streptococcus aureus, Pseudomonas aeruginosa and Candida albicans. The ethyl acetate extract exhibited the most potent antioxidant potential with the lowest EC50 of 4.15x10-30 g/ml for the peroxide radical scavenging activities. The data supports the ethnomedicinal use of the leaves of P. americana for the management of ...
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This study evaluated the nutritional and medicinal properties of seeds from Adansonia digitata (BSF) and Balanite aegyptiaca (DDSF) plants. Proximate chemical composition, mineral elements composition, flavonoids, phenolics, antioxidant... more
This study evaluated the nutritional and medicinal properties of seeds from Adansonia digitata (BSF) and Balanite aegyptiaca (DDSF) plants. Proximate chemical composition, mineral elements composition, flavonoids, phenolics, antioxidant capacity, and anti-inflammatory properties were studied. Results obtained revealed that DDSF had the highest moisture, crude fat, and crude protein content of 7.66 %, 42.80 %, 20.37 %, respectively, whilst BSF gave the highest ash, crude fibre, and carbohydrate content. Elemental analysis revealed BSF had the highest Mg content (313.65 mg/100g) and DDSF gave the highest Ca content (118.62 mg/100g). Additionally, DDSF gave the highest total phenolics (18.89 mg TAE/ 100 g), total flavonoids (8.80 mg QE/ 100 g) as well as the highest total antioxidant capacity of (19.62 mg AAE/ 100 g) dry of extract. Based on results obtained in this study, seeds obtained from the Adansonia digitata and Balanite aegyptiaca could be a potential source of functional food ...
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Research Interests:
The use of organochlorine pesticides has been banned worldwide due to their toxicities. However, some farmers use them illegally because of their potency. The aim of this study was to assess the level of organochlorine pesticide (OCP)... more
The use of organochlorine pesticides has been banned worldwide due to their toxicities. However, some farmers use them illegally because of their potency. The aim of this study was to assess the level of organochlorine pesticide (OCP) residues and the potential health risk associated with vegetables, soil, and groundwater obtained from farms in Ayigya, Nsenie, Gyenyase, and Kentinkrono in Kumasi, Ghana. A total of 15 samples were analyzed using a gas chromatograph equipped with an electron capture detector. The highest mean concentration of 184.10 ± 12.11 µg/kg was recorded for methoxychlor in cabbage from Ayigya. Beta-hexachlorocyclohexane (beta-HCH) recorded the lowest mean concentration of 0.20 ± 0.00 µg/kg in cabbage from Ayigya. The combined risk index showed significant health risk to children than adults. The soil samples mainly contained methoxychlor followed by dichlorodiphenyltrichloroethane (DDT), aldrin, and other OCPs. Concentrations of total HCHs, total DDTs, and total...
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The use of single-source molecular precursors for lead chalcogenide thin films by CVD or as nanoparticles by solution methods is reviewed. The potential applications of these materials in solar energy are discussed along with the relative... more
The use of single-source molecular precursors for lead chalcogenide thin films by CVD or as nanoparticles by solution methods is reviewed. The potential applications of these materials in solar energy are discussed along with the relative advantages of the various methods.
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Lead sulphide thin films have been successfully deposited by spin coating lead hexadecyl and octadecyl xanthate onto glass substrates and annealed at moderate temperatures. The thin films were characterized using powder x-ray... more
Lead sulphide thin films have been successfully deposited by spin coating lead hexadecyl and octadecyl xanthate onto glass substrates and annealed at moderate temperatures. The thin films were characterized using powder x-ray diffractometer (p-XRD) and were found to be face centred cubic (FCC) with the (200) being the most preferred orientation. The optical band gaps obtained were 0.93 and 1.00 eV respectively for PbS from complexes (1) and (2) annealed at 350 °C. They were all blue shifted from the bulk value of 0.41 eV.
Research Interests: Materials Science and MRS
This study focused upon the determination of physicochemical and microbial properties, including metals, selected anions and coliform bacteria in drinking water samples from hand-dug wells in the Kumasi metropolis of the Republic of... more
This study focused upon the determination of physicochemical and microbial properties, including metals, selected anions and coliform bacteria in drinking water samples from hand-dug wells in the Kumasi metropolis of the Republic of Ghana. The purpose was to assess the quality of water from these sources. Ten different water samples were taken from different parts of Kumasi, the capital of the Ashanti region of Ghana and analyzed for physicochemical parameters including pH, electrical conductivity, total dissolved solids, alkalinity total hardness and coliform bacteria. Metals and anions analyzed were Ca, Mg, Fe, Mn, NO3–, NO2–, SO42-, PO42-, F– and Cl–. Bacteria analysed were total coliform and Escherichia coli. The data showed variation of the investigated parameters in samples as follows: pH, 6.30-0.70; conductivity (EC), 46-682 μS/cm; PO43-, 0.67-76.00 mg/L; F–, 0.20-0.80 mg/L; NO3–, 0-0.968 mg/L; NO2–, 0-0.063 mg/L; SO42-, 3.0-07.0 mg/L; Fe, 0-1.2 mg/L; Mn, 0-0.018 mg/L. Total ...
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Corn stover (CS) has currently received great attention worldwide as a potential feedstock for the production of bioethanol as alternative renewable fuel or additive to gasoline. This work evaluates the quantities and chemical... more
Corn stover (CS) has currently received great attention worldwide as a potential feedstock for the production of bioethanol as alternative renewable fuel or additive to gasoline. This work evaluates the quantities and chemical characteristics of the CS available in Ghana and their conversion into bioethanol. The average quantity of CS production in Ghana per year was estimated to be 1.77 × 106 t. The cellulose, hemicellulose, and lignin contents of CS obtained from Pioneer 30 W 40, a local maize variety, were found to be 37.72 %, 20.62 %, and 30.50 %, respectively. Alkali pretreatment and enzymatic hydrolysis of the CS yielded a reducing sugar concentration of 157.96 mg/ml within 24 hours and an ethanol yield of 0.045 l/kg. It was estimated that 40 % of the average annual CS production has the potential of yielding 140.855 × 106 l of bioethanol.
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Contamination of water and soil with toxic heavy metals is a major threat to human health. Although extensive work has been performed on reporting heavy metal pollutions globally, there are limited review articles on addressing this... more
Contamination of water and soil with toxic heavy metals is a major threat to human health. Although extensive work has been performed on reporting heavy metal pollutions globally, there are limited review articles on addressing this pernicious phenomenon. This paper reviews inorganic nanoparticles and provides a framework for their qualities required as good nanoadsorbents for efficient removal of heavy metals from water. Different inorganic nanoparticles including metals, metal oxides and metal sulfides nanoparticles have been applied as nanoadsorbents to successfully treat water with high contaminations of heavy metals at concentrations greater than 100 mg l −1 , achieving high adsorption capacities up to 3449 mg g −1 . It has been identified that the synthesis method, selectivity, stability, regeneration and reusability, and adsorbent separation from solution are critical parameters in deciding on the quality of inorganic nanoadsorbents. Surface functionalized nanoadsorbents were...
Background: The recovery of phenolic compounds is seen as an arduous task because phenolic compounds are available as free aglycones, as sugar or ester conjugates, or as polymers with several monomeric components. Furthermore, phenolic... more
Background: The recovery of phenolic compounds is seen as an arduous task because phenolic compounds are available as free aglycones, as sugar or ester conjugates, or as polymers with several monomeric components. Furthermore, phenolic compounds do not disperse evenly and may be connected to cell walls, carbohydrates, or proteins. This study looks at the optimization of factors that affect the efficiency for the extraction of phenolic compounds from the stem-bark of Funtumia elastica. Methods: Five independent variables (solvent concentration, time, the temperature, solid-liquid ratio, and pH) of the extraction process were selected. Single factor analysis as well as the response surface method was used to evaluate the impact of the selected factors on the total phenolic content. The effect of the extraction factors on the phenolic content was statistically significant (p <0.05). For the response surface method, a five/factor, five/level central composite design used, and a fitte...
A novel complex [Pb((SePiPr2)2N) (S2CNEt2)] has been synthesized and characterized by microelemental analysis, melting point NMR, and FT-IR spectroscopies. Its crystal structure has also been successfully determined using single-crystal... more
A novel complex [Pb((SePiPr2)2N) (S2CNEt2)] has been synthesized and characterized by microelemental analysis, melting point NMR, and FT-IR spectroscopies. Its crystal structure has also been successfully determined using single-crystal X-ray crystallography. The structure indicates a distorted square pyramidal geometry with the four basal atoms being noncoplanar. The complex was used as a single-source precursor for the deposition of lead chalcogenide thin films on glass substrates at 300, 350, 400, and 450°C by AACVD. The films were characterized by SEM, EDX, and XRD. The XRD peaks matched with cubic PbSe at all temperatures. The SEM micrographs showed the formation of cubes with the lower temperatures (300–350°C) showing well-resolved cubes while with the higher temperatures (400–450°C) showing poorly resolved cubes. The EDX analyses confirmed the formation of PbSe thin films at all the deposition temperatures.
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The study focused on using locally produced palm kernel oil, palm ethanol and CaO catalyst from guinea fowl eggshells for biodiesel production. The physicochemical properties such as density (0.8936±0.00008165 g/ml), viscosity... more
The study focused on using locally produced palm kernel oil, palm ethanol and CaO catalyst from guinea fowl eggshells for biodiesel production. The physicochemical properties such as density (0.8936±0.00008165 g/ml), viscosity (83.32±0.193cP/P), refractive index (1.4540±0.00036), pH (5.89±0.084 mol/L H +), acid value (13.9±0.3 mgKOH/g), saponification value (283.305±23.24 mgKOH/g) and iodine value (20.7±5.77 mgI 2 /g) of the crude oil was determined. The transesterification process was carried out by optimizing reaction conditions using the One-Factor (OFAC) at a time method. The biodiesel produced from optimum conditions had density (0.877±0.001g/ml), iodine value (13.97±1.037 mgI 2 /g) and cetane index (76.215±0.531). The results also gave a kinematic viscosity (7.87±0.531 mm²/s), pour point (8.667±0.943°C), acid value (0.92±0.145 mgKOH/g) and saponification value (161.75±11.017 mgKOH/g).
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The physicochemical and microbial properties of some sachet drinking water sold in the Kumasi Metropolis of Ghana is reported in this study in order to assess the quality of water being consumed by the public. Nine different sachet water... more
The physicochemical and microbial properties of some sachet drinking water sold in the Kumasi Metropolis of Ghana is reported in this study in order to assess the quality of water being consumed by the public. Nine different sachet water samples were taken from different parts (sub- metropolises) of Kumasi and analysed for their odour, colour, turbidity, pH, electrical conductivity, total dissolved solids, alkalinity, total hardness and coliform bacteria. Metals and anions analysed were Ca, Mg, Fe, Mn, NO3−, NO2−, PO42− and Cl−. Microbes determined were faecal and total coliforms. The faecal coliform determined was Escherichia coli. Most of the sachet water samples analysed within the Ghana and WHO standards for drinking water. However, BKD, AHN and DDE water samples failed bacteriological tests and therefore makes them unwholesome and harmful to consumers.
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Dyes are usually present in trace quantities in the treated effluents of many industries. The effectiveness of adsorption for dye removal from waste waters has made it an ideal alternative to other expensive treatment methods. This study... more
Dyes are usually present in trace quantities in the treated effluents of many industries. The effectiveness of adsorption for dye removal from waste waters has made it an ideal alternative to other expensive treatment methods. This study investigates sorption properties of Tectona grandis, Ceiba pentandra and Terminalia superba sawdust for the adsorption of Vat Yellow-4, Vat Red-1 and Natural dyes in water bodies. Physical parameters of the wood sawdust and textile dye such as pH and moisture content were determined. The dye removal capacities of the various wood species were also calculated. The pH of the dyes and wood sawdust ranged from 5.93 to 9.47; and 5.06 to 8.59 respectively. The moisture content (%) also ranged from 3.00 to 4.00 with an average of 3.50. The dye removal percentage (%) by Tectona grandis, Ceiba pentandra and Terminalia superba wood sawdust were respectively found to range from 18.39 to 44.46, 9.24 to 46.65 12.66 to 63.56 for the adsorption of the various dye samples used. Adsorption of the textile dyes unto the selected Ghanaian wood sawdust conformed to the Type I isotherm according to the classification by IUPAC. The Freundlich model showed a better fit for the experimental data and could be attributed to the heterogeneous surface energies and exponential distribution of active sites which are characteristic of such cellulosic materials.
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The leaves of Persea americana are widely used for ethno-medicinal purposes worldwide. This study assessed the antimicrobial and antioxidant activities of the methanol, ethyl acetate, chloroform and petroleum ether leaves extracts of P.... more
The leaves of Persea americana are widely used for ethno-medicinal purposes worldwide. This study assessed the antimicrobial and antioxidant activities of the methanol, ethyl acetate, chloroform and petroleum ether leaves extracts of P. americana. Extracts displayed variable antimicrobial activities that were microorganism-specific. The methanolic extract displayed the most potent antimicrobial activities with the largest zones of inhibition (0-1.8 mm) in the agar diffusion assay and with the lowest minimum inhibitory concentration (MIC) in the broth dilution assay against a panel of microorganisms that included Bacillus subtilis, Escherichia coli, Salmonella typhi, Streptococcus aureus, Pseudomonas aeruginosa and Candida albicans. The ethyl acetate extract exhibited the most potent antioxidant potential with the lowest EC 50 of 4.15x10-30 g/ml for the peroxide radical scavenging activities. The data supports the ethnomedicinal use of the leaves of P. americana for the management of infections and for other symptoms whose etiology may be linked to oxidative stress.
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Lead sulfide and lead selenide thin films have been deposited from dichalcogenoimidophosphinate lead (II) complexes by AACVD. The synthesis of the precursors, [Pb((S)PPh 2) 2 N) 2 ] and [Pb((Se)PPh 2) 2 N) 2 ], is reported and the single... more
Lead sulfide and lead selenide thin films have been deposited from dichalcogenoimidophosphinate lead (II) complexes by AACVD. The synthesis of the precursors, [Pb((S)PPh 2) 2 N) 2 ] and [Pb((Se)PPh 2) 2 N) 2 ], is reported and the single crystal X-ray crystal structure of [Pb((S)PPh 2) 2 N) 2 ] determined. The films were characterised by p-XRD and SEM.
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The bioactive compounds of the leaves of Carica papaya; solo and solomix were extracted using ethanol and n-hexane, and investigated for the presence of secondary metabolites. Both ethanol and n-hexane extracts revealed the presence of... more
The bioactive compounds of the leaves of Carica papaya; solo and solomix were extracted using ethanol and n-hexane, and investigated for the presence of secondary metabolites. Both ethanol and n-hexane extracts revealed the presence of alkaloids. Flavonoids, glycosides and saponins were present in only the ethanol extract whereas tannins were present in the n-hexane extract. The bioactivities of the leaf extracts were attributed to their phytochemical constituents. Antimicrobial activity of the extracts were determined against some human pathogenic bacteria and fungi such as Staphylococcus aureus, Escherichia coli, Streptococcus pneumoniae, Bacillus subtilis and Candida albicans using the agar well diffusion and broth dilution methods with the polar extract being more effective. The ethanol extract demonstrated a significant broad-spectrum antimicrobial activity against both gram-positive and gram-negative bacteria, with the highest activity having a zone of inhibition of 10 mm. Antioxidant activity was determined using the DPPH assay method and the absorbance measured using UV-visible spectrophotometer with ascorbic acid as control. The antioxidant activities of solo and solomix showed IC50 of 1.465x10-2 and 1.364x 10-2 respectively. This study demonstrates the efficacy of ethanolic leaf extracts of C. Papaya as an alternative antibiotic for the development of newer antibacterial agents.
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Research Interests:
Research Interests: Health Promotion, Ghana, European Union, Health Policy, Manganese, and 19 moreLevels of selection, Heavy metals, Humans, Mercury, Heavy Metal, Lead, Zinc, Iron, Fruit, Tomato, Cadmium, Analysis of Variance, Poisons, World Health Organization, Food Contamination, Food Sciences, Lycopersicon esculentum, Food Inspection, and Guideline Adherence
This study focused upon the determination of physicochemical and microbial properties, including metals, selected anions and coliform bacteria in drinking water samples from hand-dug wells in the Kumasi metropolis of the Republic of... more
This study focused upon the determination of physicochemical and microbial properties, including metals, selected anions and coliform bacteria in drinking water samples from hand-dug wells in the Kumasi metropolis of the Republic of Ghana. The purpose was to assess the quality of water from these sources. Ten different water samples were taken from different parts of Kumasi, the capital of the Ashanti region of Ghana and analyzed for physicochemical parameters including pH, electrical conductivity, total dissolved solids, alkalinity total hardness and coliform bacteria. Metals and anions analyzed were Ca, Mg, Fe, Mn, NO3−, NO2−, SO42−, PO42−, F− and Cl−. Bacteria analysed were total coliform and Escherichia coli. The data showed variation of the investigated parameters in samples as follows: pH, 6.30–0.70; conductivity (EC), 46–682 μS/cm; PO43−, 0.67–76.00 mg/L; F−, 0.20–0.80 mg/L; NO3−, 0–0.968 mg/L; NO2−, 0–0.063 mg/L; SO42−, 3.0–07.0 mg/L; Fe, 0–1.2 mg/L; Mn, 0–0.018 mg/L. Total ...
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... Boadi, NO 1* , Twumasi, SK 1 and Ephraim, JH 2. ... The more stable cyanide complexes are formed with copper (I) a and silver (I). The iron-cyanide complexes are very stable and therefore not toxic; in the dark, acute toxic levels of... more
... Boadi, NO 1* , Twumasi, SK 1 and Ephraim, JH 2. ... The more stable cyanide complexes are formed with copper (I) a and silver (I). The iron-cyanide complexes are very stable and therefore not toxic; in the dark, acute toxic levels of HCN are attained only in concentrated and aged ...