ABSTRACT Nicotinic acid hydrazide (NH) and isonicotinic acid hydrazide (INI-1) and their respective acetone hydrazones were prepared. They were each complexed with U022' using the nitrate and acetate salts respectively. Both the ligands and complexes were characterized by IR, UV-VIS, gravimetric analysis, melting point measurement, and the invitro susceptibility test. The results indicate that the ligands form complexes with the metal ion with varying coordination numbers. The IR data show t...
ABSTRACT Chelates of 2-bromovaleric acid hydrazide (BVH) and acetone2- bromovaleric acid hydrazone (ABVH) with MS04 (where M is Ni, Cu, Co, Mn, Zn, V02+) were synthesized in water-methanol medium. They were characterized by infrared and electronic spectral studies, solubility, elemental analysis, conductivity and antimicrobial screemng. Electronic spectral data indicate an octahedral geometry for all the complexes while the infrared spectral data suggest that the ligands act as neutral biden...
Abstract Complexes of Malonyl and Succinyl Dihydrazides with Copper(Ii) And Uranyl(Vl) Nitrafes and uranyl acclate U02(CII/'00)2, copper nitrate Cu (N01h and copper acetate (Cl I1C00) ( 'u have lx:en synthesized using I: I metal to ligand reactant ratio. The complexes have been characterised;.ed li·mn elemental analysis, conductivity measurements, and electronic and IR spectra studies. I R data show that the ligands behave as letradmtatc ligands coordinating through both carbonyl oxygen and ...
ABSTRACT Petroleum sludge samples from Warri Refinery and Petrochemical Company (WRPC), Delta State, Nigeria and soil samples from five selected oil-impacted communities (Ubeji- 500 m, Ekpan- 1 .5 km, Aja-Etan - 2.5 km, Ifie-Kporo - 3.0 km, ljala-Ikenren - 3.8 km from WRPC) around WRPC were collected and analyzed to appraise the levels of total petroleum hydrocarbons (TPH), Polycyclic aromatic hydrocarbons (PAH), and heavy metals (Cr, Cd, Pb, Ni, Cu, Co, Mn, Fe and Zn) caused by the petroleu...
Abstract Anaerobic biodegradation of banana leaves by cellulolytic fungus (yeast) was conducted at optimum operational conditions of concentration, temperature and pH for biogas and bio liquid production. Proximate analysis of both the fermented and unfermented substrates was carried out. Effects of nutritive additives on biogas and bio liquid production were investigated. The bio liquid generated was extracted by soxhlet extraction and, its components were separated into maltenes (soluble c...
ABSTRACT The Cu, Pb, Zn and Mn content of ten chocolates and candies purchased from Abuja municipal aiea council were determined by Atomic Absorption Spectrometry (AAS). The HN03 digestion method was evaluated by the analysis of the ten replicates of the candies and chocolate which gave a precision of 2%, 3%, 17% and 2% for Cu, Mn, Ni and Zn respectively. The results of the analysis showed that the mean metal levels in the chocolate and candy samples were Ni 0.077+0.0µglg Cu/0.26±0.05...
ABSTRACT The concentrations of Fe, Zn, Cu, Pb and Cd in vegetables grown in Kaduna metropolis were determined. The nitric acid -per chloric acid mixture was used in the digestion procedure and a precision of 4.2%, 3.8%, 2.4%, 5.3%, and 5.7% was obtained for Fe, Zn, Cu, Pb and Cu respectively. Good recoveries between 88-96% were obtained for the metals studied. The concentrations of metals in the vegetables varied from 40-1 OOµg/g for Fe, 21.3-51.3µg/g Zn, 9.0-28. Oµg/g Cu, 0.7-2.6µg/g Pb...
ABSTRACT The concentrations of some trace metals (zinc, iron, copper, cadmium and lead) in 51 canned foods (fish, vegetable and fruit juice) samples purchased within Abuja Municipal Area Council (Nigeria) were determined using the flame atomic absorption spectrophotometry (FAAS). The wet oxidation procedure of HN03-H20 2 was used in the preparation of the samples. The ranges obtained for trace metals analyzed in ug/g are as follows: Canned fish: Zn (19.15±0.8-32.50±0.3), Fe (17.92± 1.2 --...
CHAPTER ONEINTRODUCTION 1.1 General Pollution affects more than our water and air; soils also are seriously polluted. It is easy to forget that the soil is more than just a mass of inert matter. In its own way, the soil is a living organism. (I) Soil is a crucial component of the rural and urban environments, and in both cases, land management is the key to soil quality. Pesticides are synthetic organic or inorganic chemicals used to control weeds in fields and lawns, and unwanted...
ABSTRACT The Ghanaian ecosystem plays host to various lagoons which serve different purposes. The most important of them is being home for different types of fish species. Examples are Sarotherodon melanotheron (Cichlidae) which is popularly called blackchin tilapia and Tilapia guineensis (Bleeker) also known as redchin tilapia. Quality assessment was done to ascertain the level of pollution in water and sediment samples from Sakumo, Chemu and Kpeshie lagoons. Physicochemical parameters (pH, ...
The pyridyl based Schiff base ligands from 2-aminopyridine and benzaldehyde and 2-aminopyridine and 2, 4-dihydroxylbenzaldehyde were synthesized by: 1. For Schiff base from 2-aminopyridine and benzaldehyde; Distillation of Benzaldeyde to ensure maximum purity from possible contaminant like water and ammonia, and refluxed with freshly prepared 2-aminopyridine. The refluxing was done with ethanoic acid catalyst at a time and without catalyst. The process was followed up with Thin Layer Chromato...
Structure of thesis The results from the thesis have been presented in chapters based on various experiments conducted. These chapters are intended as manuscripts for submission to international peer reviewed journals. Chapter 1 gives a general background to the thesis and presents pertinent literature on the topics understudy. While literature may be replete on neonicotinoids and other topics discussed in this thesis, these topics cannot be exhaustively discussed. As such, the literature mos...
CHAPTER ONE1.0 INTRODUCTIONIn the past with the necessary of metals it always seems impossible to join two metals together with grooving riveting, this idea leads to alternative of finding a lasting solution to the problem. This brought about the idea of a welding machine with a well laminated core and coil wound together to form a high rated transformer which is immersed in a can of oil.Welding is the most economical and effi...