ABSTRACT Nine pesticide residues were detected in soil and water samples from the Waanpu Dam in the Bimbilla District of Ghana at varying mean concentrations using Gas Chromatography. The pesticide residues detected in the soil and water samples were chlorpyrifos, beta-endosulfan, cypermethrin, aldrin, heptachlor, beta-BHC, heptachlor-epoxide, dieldrin, and methoxychlor. The concentration of beta-endosulfan was the highest among all the pesticides detected. It ranged from 0.001 – 0.070 µg...
ABSTRACT Valerohydroxamic and Isovalerohydroxamic acids were synthesised and recrystallised from ethylacetate. They were characterised by melting point, pka and spectral (IR NMR) studies. Their melting points are 77.78°C and 76.77°C for valerohydroxamic acid and isovalerohydroxamic acid respectively and their pka values at 0.1mol dm-3 at 28°C are 9.50+0.01 and 9.51+0.01 for valerohydroxamic acid and isovalerohydroxamic acid respectively. The IR and NMR (1H and 13C) for both valerohydroxami...
ABSTRACT The use of plastics such as polyethylene in the food industry in Ghana as opposed to traditional forms of packaging such as the use of leaves and paper is constantly growing with different designs and compositions. These plastics contain chemicals that are added during the manufacturing process. These chemicals, such as plasticizers, are used to make the plastics flexible but are not covalently bonded to the polymer, hence are able to migrate from the food packages into food when hea...
ABSTRACT The ethanolic extract (crude extract) was successively extracted with nhexane, chloroform, water, 103 aqueous methanol and n_hexane to give the corresponding fractions. The crude exfract, 103 "aqueous methanol, vvater soluble and n-hexane fractions of the root of .c_.africana, were screened for antimicrobial activity and chemical constituents. The n-hexane fraction was chromatographed on a column of silica gel to give a number of fairly pure components. The infrared spectra of the co...
Abstract The corrosion inhibition of aluminium and mild steel in H2SO4 in the presence of Bromothymol blue, BTB, Dimethyl yellow, DMY, Methyl orange, MO, Titanium (IV) oxide, TO and Cassia Siamea Lam, CSL leaves extract at 303 – 313K was studied using “Absorbance difference” technique. The results showed that inhibition efficiency (%IE) increased with increase in inhibitor concentration (except for BTB, where beyond a “critical” concentration of 0.0007M, it reversed its function and...
ABSTRACT The levels of Cd, Cu, Ni, Pb and Zn in soils of municipal solid waste and ground water within the Abuja municipality was determined. The flame atomic absorption spectrophotometry was used to determine the metals. The aqua reqia extraction method was used to extract metals from the soils. The average concentration of metals in the soil samples were Cd = 4.3 J..Lgg-1 dry weight (2.4-5.9 J..Lgg-1 dry weight), Cu = 12.4 J.!gg-1 dry weight (3.4 - 19.9 J.!gg-1 dry weight) Ni = 8.3J..Lgg-1...
Abstract This \ork. is aimed at developing solid base catalysts from locally sourced materials and applying them to an environmentally beneficial reactive distillation process for transesterification of vegetable oils with methanol into biodiesel. Solid base catalysts include calcium oxides (prepared from the calcinations of poultry eggshell, limestone, chalk clay and marble stone). By investigating these processed solid base catalysts samples catalytic behaviors in the transesterificat...
ABSTRACT Water of good quality is indispensable to human survival on earth. The provision of potable water to both the rural and the urban populations is necessary to prevent health hazards. The aim of this research was to assess water quality with respect to physicochemical parameters and trace metals levels in the water, the sediment and the fish species from the Kpong Reservoir on the Lower Volta River. The water, the sediment and the fish samples were collected monthly for six (6) months ...
ABSTRACT The investigations of Cissampe/os owariensis have largely been driven by the desire to find new drugs or new drug leads. The studies were carried out to confirm the traditional medicinal uses of the plant C. owariensis, and to identify the chemical constituents responsible for the activity. The ethnomedicinal uses of the plant include whooping cough, wound, irregular menstrual cycle, typhoid and malaria fevers. Phytochemical screening of the roots extracts revealed the presence of...
ABSTRACT The total concentration of Cd, Co, Cu, Mn, Ni, Pb and Zn were detemlined in the soil and plant materials from some selected local government areas of Nassarawa state, Nigeria. The modified USEPA- 3050 method of HNOr HCI04 - H202 was used in the preparation of soil sample for total deternlination whilst the plant materials were digested with HN03 -H202. The CaCh. DTPA extraction method was used in the determination of the concentration of bio available metals in soil samples. The fla...
Abstract Buruli ulcer (BU) is a bacterial infectious disease of the subcutaneous fat caused by Mycobacterium ulcerans, resulting in chronic, devastating, necrotizing consequences. M. ulcerans produces a polyketide-derived macrolide toxin called mycolactone, required for the organism’s virulence. The disease manifests initially as a painless pre-ulcerative subcutaneous nodule, a plaque or as a rapidly progressing oedema. The oedema, the severe form breaks down to form characteristic ulcers w...
ABSTRACT The persistent prevalence of Counterfeit and substandard drugs poses a clear and present danger globally. Its higher degree of occurrence and under-reporting in developing nations especially in Africa and Asia is of great concern. Antibiotics are amongst the most used and abused in developing countries and as such, the need for its constant surveillance cannot be over emphasised. This study involved the assessment of the quality of three commonly used therapeutic groups of antibioti...
ABSTRACT The reactions of 2-chloro-5-nitro pyridine with piperidine have been studied in acetone and in methanol In acetone, the rate constants are measured as a function of the amine concentration.
INTRODUCTION B—Diketones participate in tautomeric equilibria where an apparently pure compound is actually a mixture 'of two or three substances having keto and enol structures
INTRODUCTION B-Diketones participate in tautomeric equilibria where an apparently pure compound is actually a mixture 'of two or three substances having keto and enol structures.