September 2013

Chromium, an essential nutrient and pollutant: A review

  The increased use of chromium (Cr) in several anthropogenic activities has led to the subsequent soil, surface water and ground water contamination. It has wide applications in the dyes, stainless steel, leather tanning, electroplating of chrome, and wood preservatives industries. Chromium exists in the environment in several diverse forms such as Cr(0), Cr(III) and Cr(VI) species. Cr toxicity depends on its...

Author(s): Mandina Shadreck and Tawanda Mugadza

September 2013

Assessment of dissolved manganese (II) pollution in river water by differential pulse cathodic stripping voltammetry: A case study of River Boubo, Côte d'Ivoire

  Boubo river and lagoon, south Côte d’Ivoire, are contaminated by manganese released in wastewater from manganese exploitation and from the soil of Grand-Lahou region in Côte d’Ivoire. So, there is a need to develop a simple method for the evaluation of manganese present in natural water. This work reports the utility of rapid and inexpensive method for determination of dissolved...

Author(s): Coulibaly Mariame, , Yao N’Guessan Alfred, Bamba Drissa, Ghanjaoui Mohammed El Amine, Yousry M. Issa and El Rhazi Mamia

September 2013

Electronic and steric effects in the control of the Anilinium chloride catalyzed condensation reaction between Aldones and 4-Phenylthiosemicarbazide

  A concise series of aldehydes and ketones were reacted in a condensation reaction with 4-phenylthiosemicarbazide in order to assess the relative influence of the steric and electronic effects in the control of this reaction. While steric effects had a modest impact, electronic effects and in particular the mesomeric donating effect delivered by a phenyl ring produced a strong passivating influence on the...

Author(s): Urbain C. Kasséhin, , Fernand A. Gbaguidi, Coco N. Kapanda, Christopher McCurdy,  André K. Bigot and Jacques H. Poupaert

September 2013

Anti-Helicobacter pylori activity of Abelmoschus esculentus L. Moench (okra): An in vitro study

The anti-Helicobacter pylori activity of the methanol and hexane extracts of Abelmoschus esculentus L. Moench (okra) dried fruits were evaluated on forty-one clinical isolates and a standard ATCC 43504 strain by the use of agar well diffusion technique. The methanol extract of A. esculentus showed A. esculentus L. Moench (okra) dried fruit had inhibitory effects against Helicobacter strains; with diameters zone of...

Author(s): Olorunnipa Taiye A., Lawal Temitope O., Igbokwe Christopher C. and  Adeniyi Bolanle A