November 2013

Status and distributions of pesticides buried at five sites in Arusha and Mbeya regions, Tanzania

This study investigated the compositions and distributions of pesticides buried at five sites in Tanzania. Samples were collected from various depths up to 220 cm. The analytes in samples were extracted by pressurized fluid extraction. Labelled internal standards were used for identification and quantification. Clean-up of extracts was conducted by using column chromatographic techniques. Determination of the analytes...

Author(s): John A. M.  Mahugija

November 2013

Corrosion inhibition of Aluminum in 1 M phosphoric acid solutions using some Chalcones derivatives and synergistic action with halide ions

The purpose of this paper is to investigate the inhibition effect of some Chalcone derivatives on the corrosion behavior of aluminum in 1 M phosphoric acid solutions with and without Chalcone derivatives and to investigate the influence of halide additives namely: KCl, KBr and KI on the inhibition efficiency of aluminum. For this purpose, polarization (DC) and weight loss measurements were used. To increase the...

Author(s): A. S. Fouda, M. Abdallah and M. Eissa

November 2013

Phytochemicals, anti-microbial and free radical scavenging activities of Momordica charantia Linn (Palisota Reichb) seeds

Extractives from the seeds of Momordica charantia Linn were screened for phytochemical, antioxidant and anti-microbial activities against Escherichia coli, Candida albicans, Staphylococcus aureus, Staphylococcus epidedermis, Klebsiella pneumonia and Proteus mirabilis. The phytochemical screening of Momordica charantia seeds showed the presence of flavonoids, glycosides, sterols, fat and oil in hexane, ethyl acetate and...

Author(s): Oragwa Leonard N., Efiom Otu O. and Okwute Simon K.

November 2013

Potentials of Nigerian calcined kaolin as paint pigment

Pigment is one of the main components in paint formulation which is dominated with the use of titanium dioxide, due primarily to three important physical characteristics; which are high refractive index, high opacity and chemical inertness. However, due to increasing demand of this important pigment and the attendant increase in price, it has become imperative to develop cheaper alternative source with similar...

Author(s): Alabi F. M. and Omojola. M. O.