African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1047

Table of Content: August 2013; 7(8)

August 2013

Planning a functional city centre in a physiographic constrained landscape: A case study of Lokoja, Nigeria

  The city centre planning and redevelopment in developing cities, the location, function and physical form of such cities notwithstanding often remain the hardest planning proposal to be accomplished by any planning endeavour. The magnitude of this problem has been linked to the origin and locations of many settlements especially those associated with poor relief environment which later poses numerous planning...

Author(s): Simon, R. Funsho, Adewale Bukola and Fulani Omoyeni

August 2013

Sustainable development in a developing economy: Challenges and prospects

  Sustainable development implies development which ensures maximization of human well being for today’s generation which does not lead to declines in future well being. Attaining this path requires eliminating those negative externalities that are responsible for natural resource depletion and environmental degradation. All human activities and developmental projects are associated with environmental...

Author(s): P. C. Okonkwo

August 2013

An appraisal of the of eco-climatic characteristics in Northern Nigeria

        The character of the sub-regional eco-climatic zones has possibly changed as suggested in the dwindling fortune of agricultural productivity, documented changes in vegetation and freshwater resources and rising poverty levels especially in the hitherto productive Northern Nigeria. To determine and map the changes, if any, in these eco-climatic characteristics is therefore important...

Author(s): AbdulKadir A., Usman M. T., Shaba A. H. and Saidu S.

August 2013

Exploring opportunities for climate change adaptation in semi arid areas of Tanzania: A case of Nzega District in Tabora region

  Climate change and associated impacts are now widely acknowledged by most communities, institutions and organizations in the World to be affecting people’s livelihoods. The University of Dar es Salaam in Tanzania through the Institute of Resource Assessment (IRA) implemented a three years research program to study the implications of climate change on natural and social systems in three agro ecolocilal...

Author(s): Majule, A. E., Kauzeni, A. S and Mujwahuzi, M.

August 2013

Nature and dynamics of climate variability in the uganda cattle corridor

        The study was conducted in the districts of Nakaseke and Nakasongola stratified into four farming systems of crop dominancy, pastoralists, mixed crop and livestock and fishing. The study was guided by two research questions: (1) how do community residents perceive climate change/variability? (2) What is the trend and nature of climate variability and how does it compare with...

Author(s): Nimusiima Alex, Basalirwa  C. P. K., Majaliwa J.G.M, Otim-Nape  W. , Okello-Onen J., Rubaire-Akiiki C., Konde-Lule J. and Ogwal-Byenek S.

August 2013

Integration of hydro-climatic data and land use in neural networks for modeling river flows: Case of Lobo river in the southwest of Cote d’ivoire

  In a context of climate disruption due to uncontrolled human activities, the classical models of rainfall-runoff modeling are almost unusable. In addition on the Lobo River (Southwest of Côte d’Ivoire), no simulation study has been carried out yet despite that, this river has flooded fields and villages causing huge losses in September 2007. Neural networks appear in this case as a solution for...

Author(s): Yao Blaise KOFFI, Kouassi Ernest AHOUSSI, Amani Michel KOUASSI, Ouattara KOUASSI, Loukou Christophe KPANGUI and Jean BIEMI

August 2013

Antimicrobial activity of earthworm (Eudrilus eugeniae) paste

        Earthworm plays a major role in the proper functioning of the soil ecosystem. It acts as scavenger and helps in recycling of dead and decayed plant material by feeding on them. Earthworm increases the soil fertility and is often referred to as a farmer’s friend. Earthworms have been used in medicine for various remedies. The paste prepared from earthworm, Eudrilus eugeniae was...

Author(s): K. Vasanthi, K. Chairman and A. J. A. Ranjit Singh

August 2013

Evaluation of effect of Ophiostoma novo-ulmi on four major wood species of the elm family in Rasht (North West of Iran)

  Dutch elm disease is the most common and destructive disease of the elm family. The pathogen of Ophiostoma novo-ulmi will systematically lead to the blockage of xylems and cavities, and will finally lead to the development of wilt symptoms. The present study aimed to compare the diameter size of vessels and the number of xylary rays in four species: Ulmus carpinifolia, Ulmus glabra, Zelkova carpinifolia and...

Author(s): Shaghayegh Zolghadry, Mehrdad Ghodskhah Daryaee and Javad Torkaman

August 2013

Copepoda parasites in economically important fish, Mugilidae (Mugil cephalus and Liza falcipinnis from Lac Nokoue Lagoon in Republic of Benin, West Africa

  Fish parasitology is an indispensable tool in aquatic health studies and a basic understanding of richness of a community parasitism in many localities is essential for instituting control. Many copepod parasites are ecto-parasites which negatively affect the appearance and reduced production of species of economically important fish, both from the wild and fish farms, thus making them difficult to market. In...

Author(s): Nike F. Aladetohun, Nestor G. Sakiti and Emmanuel E. Babatunde

August 2013

The relative contributions of climatic elements and environmental factors to flooding in Awka urban area

        The aim of this paper was to determine the relative contributions of climatic elements and environmental factors to urban flooding in Awka urban area of Anambra State. Towards achieving this aim, 10 year (2000-2009) meteorological data of temperature and rainfall of the study area were collected from synoptic meteorological station in Awka and data on environmental factors were...

Author(s):   E. E. Ezenwaji, A. C. Okoye and A. K. Awopeju

August 2013

Ambient air pollution and assessment of ozone creation potential for reactive volatile organic compounds in urban atmosphere of southwestern, Nigeria

  Volatile organic compound (VOC) species react at different rate and exhibit differences in reactivity with respect to ozone formation in polluted urban atmosphere. To assess this, the variations pattern, reactivity relative to OH radical and ozone creation potential of ambient VOCs were investigated in field studies at designated sites in urban centers of Akure and Ado-Ekiti, Southwestern, Nigeria, between...

Author(s): Olumayede E. G. and Okuo J. M.

August 2013

A comparative study on Pb2+ removal efficiencies of fired clay soils of different particle size distributions

        Batch adsorption studies were carried out to evaluate the Pb2+ adsorption capacities of three different fired clay soils with different particle size distributions. Adsorption efficiency was observed to increase with an increase in clay content. Adsorption efficiencies of the fired clay soils were also influenced by the firing temperature, the solution’s acidity, initial Pb2+...

Author(s): Dejene A. Tessema and Dessalew D. Alemayehu

August 2013

Heavy metal levels in Sokoto metropolis as a result of local production of aluminium utensils

  Assessment of the levels of heavy metal pollution due to production of local aluminum articles have been carried out. Atomic absorption spectrophotometric method of analysis was used for the determination of Cu, Cd, Cr, Fe, Mn and Pb, while ethylenediaminetetraacetic acid (EDTA) back titration with ZnSO4 was used for Al. Results show that the various concentration obtained follows the order, Al > Cu >...

Author(s): A. U. Cheche, U. A. Birnin-Yauri, C. Muhammad and A. Umar

August 2013

Nitrogen mass balance in waste stabilization ponds at the University of Dar es Salaam, Tanzania

  Nitrogen mass balance in waste stabilization pond system at the University of Dar es Salaam was determined using a dynamic mathematical model in order to elucidate the biological nitrogen transformation mechanisms that are effective for removal of nitrogen in this pond system. Results show that the pond system removed 4741 g/day of nitrogen from an influent load of 8036 kg/day, which is equivalent to 59%...

Author(s): Aloyce W. Mayo

August 2013

Impairment in biochemical indices in sprayers exposed to commonly used organophosphorus and pyrethroids: A case study

        This study was carried out to evaluate the effect of spraying organophosphate, carbamate and synthetic pyrethroid pesticides on biochemical parameters viz., red blood cell (RBC) acetylcholine esterase (AchE) and plasma butyrylcholinesterase (BChE) activities, oxidative stress parameters viz.,  plasma T-BARs, catalase activity and antioxidant levels such as reduced glutathione,...

Author(s): Padmaja R. Jonnalagadda, A. Y. E. Prasad, U. V. R. Vijaya Sarathi,  G. Manohar and K. Venkaiah