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.
ABSTRACT River sediments are known to contain natural radionuclides, the concentrations of which if beyond certain limits can cause adverse health effects. The sediments from Ogun river provide large quantities of sand for construction purposes in Nigeria. Despite this, data are scarce on the natural radionuclides: 40K, 226Ra and 232Th distribution in the river sediments. This work was aimed at determining the spatial distribution of these natural radionuclides and their concentrations in th...
ABSTRACT The Boltzmann kinetic equation was used to investigate and derived theoretically the current density characteristics of carbon nanotubes exposed simultaneously to both constant (dc) and high-frequency (ac) electromagnetic fields. Generation and amplification of terahertz radiation at room temperature was predicted. We demonstrated that this can suppress electric current instabilities while still preserving a broadband THz gain. We have further shown that THz gain in the conditions of...
ABSTRACT The study analyzed imports revenue contributions from six high-risk commodities obtained from the Inspection and Control Services Company at Tema port. The six items were Auto-parts, Rice, Computers and Accessories, Household Electricals, Poultry Products and Used Clothing. The data covered five years from 2004 to 2008. The objective was to obtain revenue estimates of these six items. Another objective was to provide forecasts of yearly total revenue based on the five years revenue d...
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.
ABSTRACT Merozoite surface protein-119 (MSP-119) specific antibodies which include processing inhibitory, blocking and neutral antibodies have been identified in individuals exposed to Plasmodium falciparum. Here we intend to look at the effect of single andmultiple amino acid substitutions ofMSP-119 on the recognition by polyclonal antibodies from children living in Igbo-Ora, Nigeria. This would provide us with information on the possibility of eliciting mainly processing inhibitory antibodi...
ABSTRACT During studies on the epidemiology of malaria at a rural community, Igbo-Ora, Southwest Nigeria, genotyping of Plasmodium falciparum extracted from infective Anopheles gambiae s.l. was undertaken. Circumsporozoite (CSP) ELISA was used on crushes from head-thorax for DNA extraction and PCR amplification for the determination of P. falciparum genotypes on merozoite surface protein-I and 2 (MSP-I & 2). Of the 65 infective anophelines, P. falciparum genotypes were positively identified i...
ABSTRACT Ambient air inhalable particulate matter, Black Carbon (BC) and heavy metal concentration levels in the ambient air derived from combustion at a local palm kernel production site was assessed in this study. The goal of this work was to identify the effect of biomass burning from palm kernel oil production activities on ambient air quality at Akotokyir and its environs and the possible health effects. An IVL sampler and a Sierra Anderson (GAST) pump were used to sample PM10 air partic...
ABSTRACT Among the major lithostratigrahic units making up the Bida Basin are the lokoja and Patti formation overlain by the Agbaja Ironstone.
ABSTRACT Fault diagnosis, isolation and restoration from failure are crucial for maintenance and reliability of equipment.
ABSTRACT This work investigated the effects of mechanical depulping (asa means of pulp pre-conditioning) on thechemical, physicochemical and polyphenolic constituents during fermentation and drying of Ghanaian cocoa beans. The fermentation study and the drying study were conducted using a 5x4 factorial experiment with the principal factors being;(a) concentration of depulped beans (0, 25, 50, 75 and 100%),(b) fermentation time (0, 2, 4 and 6 days) and(a) concentration of depulped beans (0, ...
Abstract It has become certain that part o f the haemolytic component o f the anaemia of Plasmodium falciparum malaria results from increased removal o f unparasitized red blood cells. There have been several reports o f associations between positive Coom bs’ DAT and anaemia, and also of observations o f unparasitized erythrocytes in monocytes o f patients with P. falciparum infections. Perturbations in cytokine balance have also been blamed for reduced red cell survival as well as for defe...
ABSTRACT The blood type of malaria patients may determine the outcome of disease. Blood group O associates with protection, while non-O blood groups (A, B or AB) are associated with severe malaria. Rosetting of red blood cells (RBC), which is mediated by blood group A and other red blood cell surface molecules, is also associated with severe disease in the two most virulent species of Plasmodium that infect humans. The interaction of parasite ligands with blood group carbohydrates on RBC and ...
ABSTRACTQuestionnaires were administered to a hundred and thirty- two mothers (132) selected at random at four (4) mother and child welfare clinics in Accra in order to obtain their views and expectations of cowpea-fortified weaning formulations. Majority of these mothers (>80%) prepared infant weaning porridges from raw ingredients, eg. fermented maize dough, and were willing to incorporate cowpea into their infant porridges and other foods if it was available as a raw or pre-cooked flour on...