Abbreviation: Afr. J. Pure Appl. Chem.
Start Year: 2007
Page 1 of 17, showing 20 records out of 326 total, starting on record 1, ending on 20
DOI: 10.5897/AJPAC2017.0724[Article Number: 2DE281265257]
Cypermethrin is a synthetic, pyrethroid insecticide and used for agricultural practices. The leaching of this pesticide through soil is of great concern because of the possibility of contaminating ground and surface water. The mobility of pesticide in soil being the main environmental reservoir varies among soil orders and the concept is still under investigation. Hence, this study was aimed at investigating the... Read more.
DOI: 10.5897/AJPAC2017.0721[Article Number: ED173E965255]
The industrial application of a vegetable oil is determined by the oil properties. This work was undertaken to alter the properties of Jatropha curcas Kernel oil and possibly find new applications for it. The seed kernels were roasted to different temperatures (140 to 230°C) and the physicochemical properties of the cold hexane and hot water extracted oils were studied. The oil yield, saponification, iodine, acid... Read more.
DOI: 10.5897/AJPAC2016.0712[Article Number: 01105C163112]
Determination of the levels of heavy metals in sewage sludge is necessary prior to application of the sludge to agriculture because of the inherent risk of heavy metal toxicity to soil, plants and humans. The heavy metals (Cu, Cd, Pb and Zn) in sewage sludge were quantified using inductively coupled plasma optical emission spectroscopy (ICP-OES) following extraction with modified-BCR and ultrasonic assisted-BCR... Read more.
DOI: 10.5897/AJPAC2016.0700[Article Number: D85668762527]
Simultaneous citrate reduction of various ratios of silver and platinum ions leads to the formation of core-shell nanostructured bimetallics (BM). Transmission electron microscopy (TEM) and X-ray diffraction XRD data of the BMs depicted crystalline core-shell nanoparticles consisting of Ag core and Pt shell with an average size of 22.2 nm in contrast to the Pt NPs and Ag NPs monometallics average sizes of... Read more.
DOI: 10.5897/AJPAC2016.0703[Article Number: 2764FDF61453]
A biochar based adsorbent prepared from Eichhornia crassipes-molasses bio-composite was tested for its ability to remove methylene blue from aqueous solutions. Molasses were used as a granulating media for powdered biomass making it easier to prepare the biochar under set conditions. The Biochar adsorbent was prepared by igniting biomass granules at 400°C. A maximum adsorption capacity of 44.13 mg∙g-1 was achieved... Read more.
DOI: 10.5897/AJPAC2016.0701[Article Number: 22B6CCA61298]
Antibiotic resistance by microorganisms has triggered the need to discover new antibiotics to replace the old ones. The study was designed to prepare copper-paracetamol complexes which will serve as lead compounds towards the discovery of novel antibiotics. Copper sulphate was reacted with paracetamol in the presence of sodium nitrate in borate buffer to give products which were separated into three layers when... Read more.
DOI: 10.5897/AJPAC2016.0687[Article Number: A0B8D9C60136]
Four new boroxine adducts ((B3O3(Ph)3PzH) (1), (B3O3(Ph)3(PztBu,iPrH)2) (2), (B3O3(PhF2)3PzH). PzH (3) and (B3O3(PhF2)3(PztBu,iPrH)2) (4)) using phenylboronic acid, 3,5-difluorophenylboronic acid, 1H-pyrazole (PzH) and 3-tert-butyl-5-isopropyl pyrazole (PztBu,iPrH) were prepared and characterized by elemental analysis, IR, 1H-NMR and X-ray diffraction. The crystallographic study reveals that PzH and PztBu,iPrH are... Read more.
DOI: 10.5897/AJPAC2016.0690[Article Number: DB2901659678]
Nanopolyaniline (NPA) has been synthesized by chemical oxidative polymerization of aniline and characterized using Fourier transmission infrared (FTIR), X-ray diffraction (XRD) and ultra-violet visible techniques. XRD patterns confirm that NPA has crystallite size of 37 nm with monoclinic structure and UV-visible spectra indicate its band gap energy is 1.96 electron volts. Photocatalytic efficiency of as-synthesized NPA... Read more.
DOI: 10.5897/AJPAC2016.0676[Article Number: 451AB3257933]
This paper summarizes the effect of inhibitors on the corrosion of stainless steels and aluminium alloys in different media. Stainless steels and aluminium alloys have a wide range of applications in construction, transport, domestic appliances, medical, and energy related fields. The exposure of stainless steels and aluminium alloys to corroding environments however, results in the degradation of the materials.... Read more.
DOI: 10.5897/AJPAC2015.0650[Article Number: A12838856830]
We have investigated the green synthesis and antimicrobial activity of silver nanoparticles using Garcinia kola. Aqueous extract of G. kola was used to reduce AgNO3 solution to obtain black nanocrystal of silver nanoparticles. Antimicrobial activity of the silver nanoparticles was tested against Escherichia coli, Klebsiella pneumonia, Bacillus subtilis, Staphylococcus aureus, Aspergillus niger, Rhizopus stolonifer... Read more.
DOI: 10.5897/AJPAC2015.0651[Article Number: A0A449456834]
The inhibitory potentials of ethanolic extracts and four fractions of the stem bark of Ficus asperifolia – Miq. for the corrosion of mild steel were assessed using weight loss method, Fourier atomic absorption spectroscopy, scanning electron microscopy (SEM). The effects of varying immersion period, concentration of the inhibitors and temperatures for mild steel corrosion in 5 M HCl acid solution were carried out.... Read more.
DOI: 10.5897/AJPAC2015.0648[Article Number: A61ABEA56218]
A nickel vanadyl molecularly imprinted nanofiber (NVMIN) was developed by the electrospinning technique, employing polyethylene terephthalate (PET) and linear polyethylenimine (L-PEI) as the matrix polymers, nickel tetraphenylporphyrin (NTPP) and vanadyl tetraphenylporphyrin (VTPP) as the mixed-template molecules. The fabricated NVMIN was evaluated as a sorbent for the removal of NTPP and VTPP from organic media. The... Read more.
DOI: 10.5897/AJPAC2015.0654[Article Number: 4392E4856200]
The study and application of health risk assessment techniques are crucial in order to understand the risk of exposure to heavy metals and other harmful pollutants. It entails evaluating the risks of exposure at various concentrations and with reference to certain standard values approved by World Health Organization (WHO) and United States Environmental Protection Agency (USEPA). Investigation of water contamination... Read more.
DOI: 10.5897/AJPAC2015.0656[Article Number: EE1CD6956202]
New nanocomposite MnO2/Al2O3/Fe2O3 photocatalyst was successfully synthesized by sol-gel method using metal salts as precursors in the presence of acid catalyst. The as-synthesized samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), atomic absorption spectroscopy (AAS) and UV-Vis diffuse reflectance spectroscopy. Elemental analyses of the as-synthesized samples were similar to those... Read more.
DOI: 10.5897/AJPAC2015.0655[Article Number: 66018D556117]
A small library of benzimidazoles with a range of side-chain substituents have been synthesized through the condensation reaction of o-phenylenediamine derivatives and several other commercially available materials. The reactions were catalyzed by either 4M HCl or 1,3-dibromo-5,5-dimethylhydantoin (DBDMH). The compounds synthesized using DBDMH as the catalyst required a shorter reaction time, the yield was higher and... Read more.
DOI: 10.5897/AJPAC2015.0647[Article Number: 7F702F755653]
The extract of Terminalia macroptera Guill. & Perr. has been used in the management of pile and other ailments across West Africa. This has necessitated the evaluation of the toxicity of this plant in Sub-chronic and acute administration as well as heavy metal analysis. The root of T. macroptera was extracted with ethanol and analyzed for the presence of phytochemicals. The powdered root was digested and analyzed... Read more.
DOI: 10.5897/AJPAC2015.0643[Article Number: 3BC01BD55108]
This study investigated the nutritional, anti-nutritional factors, functional properties, mineral and amino acid contents of Phoenix dactylifera L. fruits using standard analytical methods. The results revealed that date palm (P. dactylifera L.) contain some percentage crude protein (1.21 ± 0.02%), crude fat (1.73 ± 0.46%), crude fibre (2.26 ± 0.07%), ash (1.88± 0.03%), moisture... Read more.
DOI: 10.5897/AJPAC2015.0636[Article Number: 4C9D8B555109]
The heterocyclic ligand (L), 3-(2-hydroxy phenyl)-2-iminothiazolidin-4-one, was synthesized by the cyclocondensation of o-hydoxy phenyl chloroacetamide with potassium thiocyanate. The stoichiometries of the title complexes were first determined by spectrophotometric mole ratio method which gave rise to the M:L ratio of 1:4 in case of Zn(II) and Cd(II) and 1:2 in case of Hg(II) ions respectively. Using these... Read more.
DOI: 10.5897/AJPAC2015.0629[Article Number: 1CAC15355110]
Volatile species (e.g. Na-,K-,Cl-, and S) are released during thermal conversion of coal causing eventual problems such as fouling, slagging and corrosion, especially in gas turbines, on super heaters and in the colder part of heat recovery systems. Thermodynamic study of the released inorganic compounds is supportive before eventually launching experimental work. Therefore, thermodynamic equilibrium was calculated... Read more.
DOI: 10.5897/AJPAC2015.0640[Article Number: 1AB127254504]
The aim of this study was to investigate alkaline reactivity potentials of calcined clay and ground waste window glass with NaOH/Na2SiO3 solution to form geopolymer, an inorganic binder. A calcined clay (CC) sourced from Ijero-Ekiti, Nigeria, was replaced by various proportions (0, 25, 50 and 75%) of ground waste window glass (GWWG) and subjected to alkaline activation by NaOH/Na2SiO3 solution. X-ray florescence (XRF)... Read more.
Page 1 of 17, showing 20 records out of 326 total, starting on record 1, ending on 20