Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2768

SRE Articles

Safety and efficacy of Contiflo OD (Tamsulosin) on catheterized patients treated for acute urinary retention caused by benign prostatic hypertrophy in Ekiti State, Nigeria

June 2013

    This study aims to assess the safety and efficacy of Contiflo OD (Tamsulosin) on catheterized adults treated for Acute Urinary Retention (AUR) caused by benign prostatic hypertrophy (BPH). In this randomized double blind prospective study, patients that reported at the Accident and Emergency Department of Ekiti State University Teaching Hospital (EKSUTH) with AUR and had...

Author(s):   Adegun P. T. and Areo P. O.

First report of Tuber macrosporum occurrence in Poland

June 2013

    Tuber macrosporum, a large spore species is first time confirmed from Poland. It grows naturally in southern part of Poland, in calcareous soils. The fruit bodies of the species were found in mixed fresh forest with dominant tree species such as:Pinus sylvestris, Carpinus betulus and Quercus robur. The soil chemistry and texture of the site was analysed. Fruit...

Author(s):     Dorota HilszczaÅ„ska, Aleksandra Rosa-Gruszecka, Katarzyna Sikora and Hanna Szmidla  

Design of an HIV drug resistant patient management system in a digitally connected world

June 2013

    It is inevitable that drug resistance will become of concern in the treatment of HIV/AIDS infected patients due to the fact that the virus mutates at a high speed, selective pressure and patients that default from treatment. Not only is the management of HIV drug resistant patients difficult, but so too is the management of the patients’ data. The use of information...

Author(s):   Yashik Singh, and Maurice Mars

Surveillance of the condition of bacteria and Amaranthus viridis in a gasoline contaminated soil

June 2013

  The condition of bacteria and Amaranthus viridis in gasoline-contaminated soil was surveyed. The soil was treated with different concentrations of petrol oil: 0 ml (control), 18, 56, 112, 168 and 224 ml. Each of the concentrations was in triplicates. Seventeen (17) bacterial isolates were recovered from the control soil while twenty (20) bacterial isolates were recovered from the...

Author(s):   Adetitun, D. O., Olayemi, A. B., Kolawole, O. M., Akintunde, O. M. and Anibijuwon, I. I.

Management of vegetal covers on Pecan tree with fertilizer irrigation

June 2013

    The pecan Carya illinoinensis (Wangeh.) K. Koch is a fruit tree in domestication process, and the components of its profitable and sustainable management are continuously generated by research (Wood, 1991, 2006). For the soil management, the plants that grow on it are traditionally cataloged under the “weed” concept, which states that they must be...

Author(s):   Socorro Héctor Tarango Rivero, Erasmo Orrantia Borunda and A. Duarte Moller

Homotopy analysis method for Zakharov-Kuznetsov (ZK) equation with fully nonlinear dispersion

June 2013

    In this paper, we apply Homotopy Analysis Method (MHAM) to find appropriate solutions of Zakharov-Kuznetsov (ZK) equations. Numerical results coupled with graphical representation explicitly reveal the complete reliability of the proposed algorithm. Key words: Homotopy analysis method, Zakharov-Kuznetsov (ZK) equation, exact solutions,...

Author(s):     Muhammad Usman, Irfan Rashid, Tamour Zubair, Asif Waheed and Syed Tauseef Mohyud-Din

Influences of rosuvastatin on the expression of matrix metallopeptidase 9 (MMP-9) through extracellular-signal-regulated kinases (ERK) pathway in mononuclear cell line (THP-1) derived macrophages induced by oxidized low density lipoprotein

June 2013

    The current study aims to probe the changes in matrix metallopeptidase 9 (MMP-9)expression during differentiation as the mononuclear cell line THP-1 is converted into foam cells, as well as the underlying influence and mechanism of rosuvastatin.PMA was used to induce THP-1 cells transform into macrophages and treated with various concentrations, whereas...

Author(s):   Qian Zhang, Hong-jun Zhu, Ji Yan, Li-kun Ma, Jian Xu, Hua Yu and Kang-yu Chen

Influences of nitrogen and potassium fertilizer rates on pepper and tomato yield and nutrient uptake under field conditions

June 2013

    The influence of nitrogen (N) and potassium (K) fertilizers on pepper (Capsicum annuum L.) and tomato (Lycopersicon esculentum Mill) growth, fruit production and nutrient uptake was determined under field conditions for two successive years. The aim of the experiment was to determine the optimum N and K fertilizer rate for yield and quality parameters. Experiments were...

Author(s): Ibrahim ORTAS

Effect of drought stress on yield and yield components of maize hybrids

June 2013

    The effect of drought stress on yield and its components was studied on six (6) Iranian commercial corn hybrids at the Khorasan Razavi Agricultural Research and Natural Resources Institute Mashhad, Iran in 2010. The study was conducted in a randomized complete block design with three replications under drought stress conditions. There were significant differences among hybrids...

Author(s):     Khodadad Mostafavi, Morteza Firoozi and Seyed Mohammad Nasir Mousavi

Community knowledge of traditional mosquito repellent plants in Kolla Temben District, Tigray, Northern Ethiopia

June 2013

    Insect repellents have been used to reduce human-vector contact for long periods of time in different parts of the world. Thus, the aim of this study was to assess the knowledge of traditional mosquito repellent plants among inhabitants of Kolla Temben district, Ethiopia. Two hundred and forty households were selected for an ethnobotanical survey using stratified, systematic...

Author(s):     Dawit Kidane, Zewdneh Tomass and Tadesse Dejene

Validation of dynamic modelling of an industrial vibratory bowl feeder

June 2013

    This paper presents a simple approach to model an industrial vibratory bowl feeder. The vibratory feeder is a device used to separate, feed and locate automatically a variety of parts in order to speed up the process of manufacture and assemble in industry. The analytical model obtained is validated through an experimental setup, assembled in laboratory, composed by a...

Author(s):   Marcos A. Felizola, Álvaro M. S. Soares, João B. Gonçalves and Pedro P. L. Prado

Static synchronous series compensator and static var compensator interaction on voltage stability limit enhancement and active power loss minimization through differential evolution algorithm

June 2013

    This paper proposes an application of differential evolution (DE) algorithm based extended voltage stability margin and minimization of real power loss incorporating static synchronous series compensator (SSSC) and static var compensator (SVC) devices. A new circuit element based model of SSSC and variable susceptance model of SVC are utilized to control the line power flows...

Author(s):   L. Jebaraj, C. Christober Asir Rajan, K. Sriram, J. Ramesh and R. Sivasankari

Donkey traction, use and welfare needs at Daman region of Dera Ismail Khan, Pakistan

June 2013

  This paper reviews donkey utilization in the livelihood of people in the arid zone of Dera Ismail Khan and adjoining areas of Khyber Pakhtoon Khawa, commonly known as Daman. The physical atmosphere of Daman region is rather harsh and the annual rainfall is low. The lands are sandy to muddy or mixed, very poor in nutrients and relatively salty. Most of the region is a broad plain approximately 500 to...

Author(s): Muhammad Shuaib Khan , Muhammad Ghias Uddin Shah, Syed Atta Husain Shah, Jamil Ahmad Gandahiz, Sumera Ali Khan, Farooq Alam, Ghulam Murtaza Lochi and Syed Mubashir Hasan

A review on the fabrication techniques of functionally graded ceramic-metallic materials in advanced composites

June 2013

    Whenever two or more dissimilar materials are bonded, large jump in the stresses occurred at the interface during the fabrication will leads to the delamination and poor load-bearing performance on the final structures. Functionally graded material (FGM) which has compositional and microstructure gradient along its thickness was introduced to be a great solution to this...

Author(s): Siti Nur Sakinah Jamaludin, Faizal Mustapha, Dewan Muhammad Nuruzzaman and Shah Nor Basri

Influence of feeding synbiotic containing Enterococcus faecium and inulin on blood metabolites, nutrient digestibility and growth performance in sheep fed alfalfa-based diet

June 2013

    The present study was conducted to investigate the effects of synbiotic (SYN) containing Enterococcus faecium and Inulin on blood metabolites, nutrients apparent digestibility and performance of sheep fed alfalfa based diet. The 21 Farahani sheep averaging body weight 33.9 kg were allocated in a completely randomized design with 7 replicates in each treatment. The...

Author(s): M. Kazemi-Bonchenari, H.A. Ghasemi, M. Khodaei-Motlagh, A. H. Khaltabadi-Farahani, and M. Ilani

Developing new exchanger for removal of inorganic arsenic species from groundwater

June 2013

    A new Dowex monospher-BBr exchanger was prepared by the reaction between the conjugated base sulfonic acid [R-S-O3]- of DOWEX MONOSPHERE MR-450 UPW and the strong Lewis acid BBr3 forming adduct (coordinated complex) [(R–S-O3)2 BBr3]+3. The prepared resin is a promising exchanger for the removal of inorganic arsenic species from underground water. More than...

Author(s):   Reham S. Hassan and M.R. El-Naggar  

Linear thermoelastic analysis of a functionally graded (FG) rotating disk with different boundary conditions using Adomian’s decomposition method

June 2013

    Linear thermoelastic formulation of a functionally graded rotating disk is studied in the present paper. Thermoelastic solution of a rotating disk, due to the nonhomogenous terms, needs more mathematic operation and the solution of the governing equation is more complicated. In the present paper, thermo elastic formulation of a functionally graded rotating disk is presented...

Author(s):   M. Arefi and G. H. Rahimi  

Macroscopic and microscopic findings of infant lung in case of live or still birth

June 2013

    In the case of a newly born infant, either stillborn or found dead, the state of the lungs is of particular forensic interest. The aim of this study was to determine whether lungs are adequate for pathological comment about stillbirth or live birth of an infant. In order to evaluate the relevance of 171 autopsy reports of infants, macroscopic and microscopic findings, and body...

Author(s): Nursen Turan, Isil Pakis, Riza Yilmaz and Elif Gunce

Simulation of the adaptive neuro-fuzzy inference system (ANFIS) inverse controller using Matlab S-function

June 2013

    In this paper, for the purpose of simulating the mathematical model of adaptive neuro-fuzzy inference system (ANFIS), we use Matlab/Simulink environment with its powerful S-functions. The simulated model of ANFIS network can be then used to make the simulation of the identification and the control of linear or nonlinear systems. Created Simulink block of ANFIS give...

Author(s):     Tarek Benmiloud

Theoretical analysis on the laminar flow of an elastico-viscous fluid between a moving elliptic plate with constant injection and the ground

June 2013

    A theoretical study is presented for the problem of injection of an elastico-viscous fluid through a moving elliptic plate. The governing equations are reduced to a system of nonlinear ordinary differential equations by means of appropriate transformations for the velocity components. The resulting boundary value problem is solved numerically using the Matlab solver singular...

Author(s):     Serdar Barış and M. Salih Dokuz

Experimental and numerical stress analysis of glass fiber-reinforced polymer (GFRP) -stiffened shells with cutout under axial loading

June 2013

    In the present study, the stress analysis of thin-walled glass fiber-reinforced polymer (GFRP) cylindrical shells with and without cutout subjected to axial loading was carried out by using experimental and finite-element method. The effect of cutout type on the stress distribution of the shell was described. In the experimental procedure electrical strain gauges...

Author(s):   Saleh Yazdani and GH Rahimi  

Screening for antimicrobial and antimalarial activities of longan (Dimocarpus longan Lour) seeds

June 2013

    In this paper, for the purpose of simulating the mathematical model of adaptive neuro-fuzzy inference system (ANFIS), we use Matlab/Simulink environment with its powerful S-functions. The simulated model of ANFIS network can be then used to make the simulation of the identification and the control of linear or nonlinear systems. Created Simulink block of ANFIS give...

Author(s):   Yuttana Sudjaroen  

Perceptions of rural consumers on the quality of mutton in the Eastern Cape Province, South Africa

June 2013

    The objective of the study was to determine the perceptions of consumers from the Eastern Cape Province of South Africa on the quality of mutton. A survey was conducted on 215 consumers from five different municipalities in the Eastern Cape province of South Africa. Data was gathered from interviewed consumers at the point of purchase, or when they left the shops. Door to door...

Author(s): Zikhona T. Rani, Arnold Hugo and Voster Muchenje

Mechanism(s) of humic acid induced beneficial effects in salt-affected soils

June 2013

    There is enough evidence that humic acid (HA) helps to enhance crops yield by promoting certain physical, chemical and biological activities in soil-plant system. Indigenously produced coal derived, HA was added to saline-sodic silty clay soil to determine its effects on activities of alkaline phosphatase, urease, microbial activities, cation exchange capacity and moisture...

Author(s): Riaz .A. Khattak, Haroon .K. and Dost Muhammad

Developing new exchanger for removal of inorganic arsenic species from groundwater

June 2013

    A new Dowex monospher-BBr exchanger was prepared by the reaction between the conjugated base sulfonic acid [R-S-O3]- of DOWEX MONOSPHERE MR-450 UPW and the strong Lewis acid BBr3 forming adduct (coordinated complex) [(R–S-O3)2 BBr3]+3. The prepared resin is a promising exchanger for the removal of inorganic arsenic species from underground water. More than...

Author(s):   Reham S. Hassan and M.R. El-Naggar

Effects of corona discharge treatment on the mechanical properties of biocomposites from polylactic acid and Algerian date palm fibres

June 2013

    In this paper, biocomposites materials based on date palm fibres (untreated or treated with corona discharge) as reinforcing elements and polylactic acid matrices were prepared and characterized. The objective of this study was to evaluate the mechanical properties of these biocomposites by modification of date palm fiber by using corona...

Author(s): Siham AMIROU, Abdelatif ZERIZER, Imane HADDADOU and André MERLIN

Determination of economic thickness of insulation of local hemispherical clay pot

June 2013

    Undue bulkiness, which characterizes most design in the past, is gradually giving way to economic approach to design, which gives optimal solutions to engineering problems through optimum design techniques, leading to material and cost economy. This paper formulates a mathematical problem and presents a computer–aided solution for determination of economic thickness of...

Author(s): Olatona G. I. and Alamu O. J.

Evolution of menstruation in mammals

June 2013

  Why do placental mammals dismantle their endometrium in cyclic pattern? And why the amount of blood that is lost relative to the reabsorbed amount differs between species Some species as in humans shed notable amount of blood in association with menstruation that occurs by the end of the menstrual cycle, whereas, other species barely discharge any blood in what is known as...

Author(s):   Rabi Ibrahim Rabady

Predicting the microbial safety of irrigation water and fresh produce: A collaborative approach

June 2013

    Outbreak of food borne illnesses as a result of consumption of fresh vegetables and fruits is occurring regularly. In USA for example, it has become business as usual to hear and read about fresh produce recalls. Although, the increase has been attributed to many factors it is however more important to find solution to the problem. An effective solution will be a proactive...


Effects of combinations of ethanolic extracts of Blighia sapida and Xylopia aethiopica on progesterone, estradiol and lipid profile levels in pregnant rabbits

June 2013

    The effects of ethanolic extracts of Xylopia aethiopica fruits and Blighia sapidaroots, used by some rural dwellers in western part of Nigeria for arbortifacient purposes, were investigated using pregnant rabbits. A combination of X. aethiopicaand B. sapida in a ratio 1:1 at concentrations of 10.0 mg/ kg body weight (group B) and 50.0 mg/ kg body...

Author(s):   Odesanmi OS, Ayepola Olayemi, Omotosho OE, Ogunlana OO, Frank Onwuka and Nwankpa Promise

Formulation, characterization and ex-vivo permeation studies on gentamicin-loaded transdermal patches based on PURASORB® polymers

June 2013

    Topical administration of gentamicin, an aminoglycoside antibiotic commonly used for treatment of bacterial infections, is limited by toxicity and membrane impermeability. The purpose of this study was to develop an alternative non-invasive, convenient and cost-effective drug delivery system for enhanced skin delivery of gentamicin. The patches were formulated...

Author(s):   Petra Obioma Nnamani, Franklin Chimaobi Kenechukwu, Esther Uju Dibua, Celestine Chidi Ogbonna, , Mumuni Abdul Momoh, Augustina Uche Olisemeka, Agubata Chukwuma Obumneme and Anthony Amaechi Attama

Regulation of cytokine gene expression during Brucella abortus infection

June 2013

  Toll-like receptors (TLR) play a key role in antimicrobial host defense. Bacterial cell wall components and lipopolysaccharide (LPS) are recognized by macrophages via TLR, resulting in activation of professional antigen-presenting cells, initiation of acquired immune responses and further elimination of the invasive bacteria. TLR2 and TLR4 have been shown to recognize bacterial components. TLR2...

Author(s):     Cervantes-Flores Maribel, Martínez-Romero Aurora, Ramírez-Valles Eda Guadalupe, Saucedo Mendiola-Leticia, Moreno-Lafont Martha C., López-Santiago Rubén, Estrada-García Iris and Mojica-Marín Virgilio

Role of hydrogen peroxide (H2O2) enhanced anaerobic co-digestion of petrochemical wastewater on cycle time minimization during biomethanation

June 2013

    The latent of per-oxidation pretreatment to petrochemical waste water (PWW) prior to anaerobic co-digestion process was explored in continuous stirred tank reactor (CSTR) continually with dairy cattle and beef cattle manure. Oxidation by hydrogen peroxide (OHP), elevated biodegradability index (BOD/COD) up to 35%. While CSTR operated with non-OHP PWW, system was found to be...

Author(s):     Md. Nurul Islam Siddique, Mimi Sakinah Abd. Munaim and A. W. Zularisam

Effects of infrared irradiation on barley grain starch degradation in the rumen of sheep

June 2013

    This study was conducted to evaluate effects of infrared irradiation for 60, 90, 120 and 150 s on starch ruminal degradability and chemical composition of barley grain. Three ruminally fistulated rams were used to measure in sacco degradation. There was a linear increase on DM chemical...

Author(s):   Amir Fattah, Ali Asghar Sadeghi, Ali Nikkhah and Mohammad Chamani

Polymorphic dominant height and site index models for Chinese fir (Cunninghamia lanceolata) plantations in Southern China

June 2013

    Difference methods based on six growth equations namely: Richards, Weibull, Korf, Logistic, Schumacher and Sloboda were adopted to build polymorphic dominant height and site index equations for Chinese fir plantations in Southern China. Data from stem analysis of 157 trees were used for the model construction. The performance of 15 equations including 10 kinds of difference...

Author(s):   Ai-Guo Duan, Jian-Guo Zhang, Shu-Zhen Tong and Cai-Yun He

Farmers’ common bean variety and seed management in the face of drought and climate instability in southern Ethiopia

June 2013

    This study reports the various elements and contexts that characterize the farmers’ use and management of common bean seed and varieties in southern Ethiopia. The study used focus group discussions, contact-farmer interviews and surveys. The results demonstrate that farmers’ cropping systems and preferences vary strongly. Moreover, the high level of environmental...

Author(s):   Asrat Asfaw,, Conny J. M. Almekinders, Paul C. Struik and Matthew W. Blair

Community composition and abundance of residential birds in selected church forests, Tigray Region, Northern Ethiopia

June 2013

    Birds are among the best known parts of the earth’s biodiversity. This study was conducted in three selected church forests located in different agroclimate zones (Kola, Weyna Dega and Dega) in Tigray region, Northern Ethiopia to investigate the community composition and abundance of residential birds. Data collection was carried out between November 2011 and March 2012...

Author(s):   Hailemariam Areaya, Meheretu Yonas and Tsegazeabe Hadush Haileselasie

Intelligent-classical hybrid scheme controller for better transient response and steady state error of twin rotor MIMO system

May 2013

  A hybrid control scheme of Sugeno Fuzzy PD-like System (SFPDS) and PID controller is introduced in this work. The idea of the proposed strategy is to manipulate the control error signal in two stages: the SFPDS first, and then the PID. The manipulated signal is finally provided as a control action to the system. The proposed control strategy aims at combining the benefits of utilizing the artificial...

Author(s): Tang S. H., Thair Sh. Mahmoud and Mohammed H. Marhaban

Morphogenetic types of cuticles and melanin granules in the anagen phase of hair follicles

May 2013

  Our studies on the scalp and hair follicles have a particular interest in the formation of white hair and melanin; however, representative images of white hair and melanin formation have been difficult to find. The morphogenetic types of melanosomes and cuticles in hair follicles are diverse. The generated form of melanin granules include soft melanosomes that penetrate through the outer root sheath...

Author(s): Ju-Young Lee, and Byung Soo Chang

Investigation of corrosion properties of uncoated and hot dip galvanised dual phase steel (DP450) welded using spot welding

May 2013

  DP450 dual phase steel has attracted an increasing attention as a material with commercial value for certain applications in automotive industry, nowadays. The purpose of this study was to investigate microstructure, micro-hardness, tensile shear tests, and corrosion properties of DP450 dual phase steel sheet welded using spot welding under both uncoated and hot dip galvanised conditions. Experimental results...

Author(s): Mustafa ACARER, Hayrettin AHLATCI and Fatih HAYAT

Moments of the number of triangular configurations in binomial trials

May 2013

  Consider a matrix of locations in rows and columns, and suppose that at each location a binomial trial materializes independently which results in a specified event E with some probability. One possible configuration is that the event occurs at three adjacent locations, which we call a triangular configuration. The number of these triangular configurations is a random variable with a highly complex...

Author(s): Zafar Iqbal

Development of drought vulnerability maps in the Parambikulam - Aliyar Basin, Tamil Nadu, India

May 2013

  Assessment of occurrence of drought in a basin provides useful information for sustainable water resource planning and management. This study attempts to develop the spatial pattern of drought vulnerability based on frequency and severity of drought events at 3 and 12 month time scales in the Parambikulam-Aliyar river basin. Using the standardized precipitation index (SPI) as a drought assessment and...

Author(s): M. Manikandan and D. Tamilmani

Analytical and computational fluid dynamics (CFD) investigation of the applicability of a ferrofluidic magnetic micropump for fluids with stress-sensitive mircroparticles

May 2013

  This paper presents analytical and computational fluid dynamics (CFD) investigations of the applicability of a novel ferrofluidic magnetic micropump for fluids with stress-sensitive microparticles. The velocity, pressure, and stress fields in the annular channel of the pump were determined analytically for the case of channels with rectangular cross sections and small aspect ratios (h/w→ 0) under...

Author(s): M. I. Kilani, M. I. Al-Widyan and A. Al Halhouli,

Regional climate model: Investigating the impacts of climate change on water availability in Nigeria

May 2013

  Nigeria and the rest of African nations, despite the fact that they produce less than 4% of global greenhouse gas emissions, are considered the world’s most vulnerable regions with regard to the effects of climate change due to the fragility of their economies. However, it is still very difficult to assess the extent of such changes and the specific environmental impacts particularly on water...

Author(s): O. J., Matthew, Awotoye, O. O., Dada, A. C. and Odedokun, O. D.

An improvement on the use of empirical green functions for ground motion synthesis to predict Tehran’s main earthquake

May 2013

  This research presents potential use of the empirical green function (EGF) approach and kinematic rupture models as a predicting tool in strong ground motion seismology. The former applications of EGF were employed on very small earthquakes, so the results were not reliable for almost all earthquakes recorded in the crowded metropolitan areas, due to improper signal to noise...

Author(s): A. Golara, and R. Ahmady Jazany

Computational simulation of frequency inverter ramps applied to an electric vehicle

May 2013

  This work aims to represent acceleration/deceleration ramps generator and a voltage/frequency control through a SCICOS block diagram for evaluation of values commonly used with electric vehicles. It was opted for the representation of functional block diagrams for implementing the models, and was adopted the free software SCILAB/SCICOS to design and to simulate the representations proposed. Also measurements...

Author(s): Francisco Jose Grandinetti,, Luiz Octavio Mattos dos Reis, Wendell de Queiroz Lamas, Paulo Antonio dos Santos and Denis Fernando Ramos

Screening for antimicrobial and antimalarial activities of longan (Dimocarpus longan Lour) seeds

May 2013

  The aims of this study were to evaluate methanolic extract of longan seed for antibacterial, antimalarial (antiplasmodial) activity and conducted with cytotoxicity test by using sulforhodamine B (SRB) assay with Vero cells (African green monkey kidney cell line). The methanolic extract was tested for antimicrobial activity with five strains of pathogenic bacteria including Staphylococcus...

Author(s): Yuttana Sudjaroen

Characteristics of duckweed and its potential as feed source for chickens reared for meat production: A review

May 2013

  With the high cost of the conventional protein required in producing meat and its products to meet demand by the ever-increasing population, it is imperative that other cheaper alternatives be explored. One such protein source is duckweed. This paper focuses on the attributes that duckweed has which make it a special contender as a protein source for chickens. The paper also focuses on the challenges...

Author(s): Marizvikuru Mwale and Francisca Rumosa Gwaze

Spatial and temporal variability of windborne dust in the Sahel-Sahara zone in relation with synoptic environment

May 2013

  Windborne dusts have been recognised as climatic indicators in the Sahel region, because of their ability to cause reduction in horizontal visibility. These phenomena have intensified after the exceptionally drought periods in the 1970s over the Sahel region. In this work, we have analysed the spatial and temporal evolution of visibility reduction in the Sahel-Sahara zone between 1957 and 1987. The results...

Author(s): Siélé SILUE, Abdourahamane KONARE, Arona DIEDHIOU, Véronique YOBOUE, N&#;Datchoh E. TOURE, and Paul ASSAMOI

Characterisation of two kaolin facies from Ediki, Southwest Cameroon

May 2013

  Sand-rich (ESR) and sand-poor kaolin (ESP) facies from Ediki, Southwest (SW) Cameroon, have been mineralogically and geochemically characterised in order to elucidate on their emplacement and degree of kaolinization. The mineralogical assemblage comprised quartz, kaolinite, muscovite, microcline, goethite and anatase. ESP registered a sharp peak at 3620 cm-1 and two weak inflections between the doublets...

Author(s): M. L. DIKO, and G. E. EKOSSE

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