Chemistry Research Papers/Topics

Synthesis And Characterization Of Metal Complexes Of 2-Benzoylpyridine And Di-2-Pyridyl Ketone Schiff Base Ligands Derived From S-Methyldithiocarbazate Fragment And Its Application To Biologi

ABSTRACT The synthesis, characterization, spectroscopic and biological evaluation of 2-benzoylpyridine-s-methyldithiocarbazate (HL1 ) and di-2-pyradylketone-s-methyldithiocarbazate (HL2 ) with selected metal ions of copper (II), zinc (II), cadmium (II), nickel (II), iron (II) and cobalt (II). The ligands, HL1 and HL2 were synthesized by an acid catalyzed condensation reaction of s-methyldithiocarbazate with 2-benzoylpyradine and di-2-pyradylketone respectively. The reaction of metal salts wi...

Assessment Of Heavy Metal Concentrations In Water And Sediment Of Dams In Central Namibia And Bioaccumulation Of Copper In Locally Occuring Crabs And Fish

ABSTRACT Mining is a major contributor to water pollution, which can lead to accumulation of heavy metals in aquatic systems. Mining activities in the Karstveld, specifically in the Tsumeb-Grootfontein-Otavi area, may potentially result in heavy metal pollution of water sources. A seasonal study was conducted to assess the concentration of heavy metals in aquatic systems that receive water from the Karstveld aquifer. The potential of locally occurring fish and crab species as bio-indicators ...

A Computational Study Of The Structure, Bonding, And Thermochemical Properties Of Primary Ozonides Derived From Substituted Phenol And Thiophenol

ABSTRACT Ozone (O3) is an allotrope of oxygen occurring naturally in the earth’s atmosphere. Its importance in environmental issues is well documented and cannot be overemphasized. Ozone reacts with carbon-carbon multiple bonds such as in alkenes via the ozonolysis process. The first step of ozonolysis involves the formation of an important but very unstable primary ozonide (POZ) which after formation, immediately rearranges to the more stable secondary ozonide (SOZ). Due to its instabilit...

Interactions Of Cadmium Selenide (Cdse) Quantum Dots With Coagulant Proteins Extracted From Moringa Oleifera Seeds

ABSTRACT In order to investigate the interaction mechanism between Cadmium selenide (CdSe) quantum dots (QDs) and Moringa oleifera seeds coagulant protein (MOCP), CdSe QDs with hexagonal phase and crystalline size of 3.1-8.1 nm were synthesized in presence of organic solvent Trioctyl-n-phosphine oxide (TOPO) and Trioctyl phosphene (TOP) using colloidal synthesis. The purified mesoporous M. oleifera seeds coagulant protein (MOCP) with a surface area of 8.4134 m2 /g, was extracted from M. olei...

Chemical Characterisation Of The Volatile Constituents Of Essential Oil From Commiphora Wildii (Omumbiri) Resin

ABSTRACT Commiphora wildii (Omumbiri), a member of the Burseraceae family, is the most important resin‒producing plant used by Himba women for perfume. The Opuwo Processing Facility (OPF) is currently producing Omumbiri essential oil which they supply to companies in Namibia, South Africa, Germany and France. However, most of their products are sold in Southern Africa, and supply outweighs the demand. OPF is currently working on improving the reproducibility of production of the oil to mak...

The Synthesis And Characterization Of Copper(Ii) Complexes Containing Thiosemicarbazone And Semicarbazone Ligands Derived From Ferrocene And Pyridyl Fragments

ABSTRACT The synthesis and characterization, spectroscopic, and biological studies of 2-acetylferrocenyl-4- phenylthiosemicarbazone, 2-acetylferrocenyl-4-methylthiosemicarbazone, 2-acetylpyridine-2- thiophenecarboxylsemicarbazone and 2-acetylferrocenyl-2-thiophenecarboxylsemicarbazone with copper(II) chloride are reported here. The ligands were synthesized by condensation reaction of appropriate carbonyl and amine compounds. The reactions were carried out in the presence of acetic acid. The ...

Industrial Pollution In Ghana: Some Selected Case Studies Of Industries In Tema.

Abstract Waste waters from eight selected industries namely Tema Oil Refinery, Tuyee Manufacturing Industries, Cocoa Processing Company, Tema Lube Oil Company Limited, Pioneer Food Cannery Limited, Bridaltrust Paints Company Limited, Ghana Textiles Manufacturing Company and Ghana Textiles Printing Company Limited were sampled and subjected to various physico-chemical and trace metal analysis to determine levels of pollutants, using standard methods of WHO, AO AC and APHA. Generally, the ROD v...

Synthesis, Characterization And Luminescent Properties Of Bipodal And Tripodal Pyrazole And Triazole Lanthanide Coordination Complexes,

ABSTRACT Lanthanide complexes have been established as promising agents in their application as catalysts and photo-luminescent materials. Recent research has been geared towards the optical application of these lanthanide complexes, especially as organic light-emitting diodes (OLED) for TV screens, phones and other portable electronic devices. The luminescent ability of these complexes is largely dependent on the choice of ligand environment. We report here for the first time lanthanide comp...

Structure Determination And Bioactivity Of Novel Chlorinated Peptides Isolated From Rhodococcus Sp. M1042

ABSTRACT The Rhodococcus sp. M1042 is a new microbial strain that was isolated from soil sediments collected from Munzur Valley in Tunceli, Turkey. Species in this genus have been found to harbour extensive secondary metabolic pathways that produce novel metabolites with bioactivity with industrial and environmental bio-applications. The complete genome sequence of this strain contains 5,948,800 mega base pairs with 230 NRPS, PKS and NRPS-PKS gene clusters, some of which have been identified ...

Bioaccessibility Studies Of Potential Toxic Elements (Ptes) In Medicinal Plants From Different Locations In Accra Metropolis, Ghana

ABSTRACT Medicinal plants represent an important class of various traditional medicines. Over the years, their usage in primary health care intervention has increased in both developed and developing nations. Nowadays herbs are known to be the storehouses of most potential toxic elements (PTEs). In Ghana, most studies on PTEs have focused on only single environmental compartment to characterize medicinal plant contamination. In the present study, an integrated sampling programme that relates ...

Synthesis And Evaluation Of Piperazine-Carboxamide Derivatives As Potential Antimalarial /Antimycrobialagents

ABSTRACT Malaria and tuberculosis continue to be endemic in Africa and several other regions across the globe. Malaria is caused by a parasite transmitted by the female anopheles’ mosquito. Plasmodium falciparum is responsible for human malaria in most part of Africa and Plasmodium vivax causes malaria in Asia. Tuberculosis on the other hand is caused by Mycobacterium tuberculosis which is propelled when an infected person coughs, sneezes or even talks. Together, these two diseases are resp...

Enhancement of Solubility, Dissolution And Stability Properties of Griseofulvin

ABSTRACT  Good aqueous solubility and permeability of a drug is essential for the desired concentration (bioavailability) to be achieved in systemic circulation. Poor solubility of drugs remains a major challenge in pharmaceutical firms. Such drugs lead to poor bioavailability, dissolution rates, stability, permeation through membrane and extensive presystemic metabolism. Oral route remains the preferred choice of drug administration but the poor solubility of Griseofulvin, a class II drug o...

Thin Layer Chromatographic Studies on Some Herbicides in Two Soil Ecosystems

ABSTRACT Depletion rates of three triazine herbicides, atrazine, simazine and ametrine and two urea based herbicides, diuron and metobromuron, under laboratory conditions have been investigated in soil samples collected from GAEC, a coastal savannah soil, and KNUST, a forest zone soil. Two hundred grammes of the soil samples were treated with herbicides standard solution to generate herbicide-soil the concentration of 10 pg/g and incubated at room temperature for 12 weeks. TLC methodology wa...

Distribution Of Heavy Metals In Cocoa Farm Soils In The Western Region Of Ghana

Western Region is the largest cocoa producer in Ghana. Cocoa farmlands have over the past decades received heavy doses of agrochemical application to boost cocoa production. These agrochemicals, however, may contain heavy metals and it is therefore likely that the metals may have accumulated in the soils. Evaluating the total concentrations and understanding the distribution characteristics of heavy metals in cocoa growing soils can aid environmental managers and even help regulate the r...

Industrial Pollution In Ghana: Some Selected Case Studies Of Industries In Tema

Abstract Waste waters from eight selected industries namely Tema Oil Refinery, Tuyee Manufacturing Industries, Cocoa Processing Company, Tema Lube Oil Company Limited, Pioneer Food Cannery Limited, Bridaltrust Paints Company Limited, Ghana Textiles Manufacturing Company and Ghana Textiles Printing Company Limited were sampled and subjected to various physico-chemical and trace metal analysis to determine levels of pollutants, using standard methods of WHO, AO AC and APHA. Generally, the ROD v...


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