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Search Results: 1 - 10 of 359043 matches for " D. N. Fonkem "
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A Microbiological and Nutritional Evaluation of the West African Dried Meat Product, Kilishi
M. J. Jones, V. N. Tanya, C. M.F. Mbofung, D. N. Fonkem, D. E. Silverside
Journal of Food Technology in Africa , 2001,
Abstract: The quality attributes of Kilishi, a West African dried meat product were studied over an eight week storage period comparing traditional production and packaging systems with a potassium sorbate treatment system and simple modern packaging. Changes in chemical composition and microbiological counts are reported. Moisture and water activity results indicated that the experimental Kilishi was sufficiently dried to minimise microbial growth. Fat oxidation levels measured by free fatty acids (FFA) (%) on extracted fats were unacceptably high (>1.2-2.1%) and may be a reflection of the quality of the groundnut and its oil in the ingredients. Processing of beef into Kilishi appears to lead to a decrease in mineral availability. Results suggest that treatment of Kilishi with 10% (w/v) potassium sorbate confers a degree of protection of the product from mould contamination. Aflatoxin levels far exceeded all established safe limits and are thought to be due to the use of pre-contaminated groundnut, as mould growth levels in Kilishi were very low. The Journal of Food Technology in Africa Volume 6 No.4, 2001, pp. 126-129 KEY WORDS: aflatoxins, dried meat, food preservative, kilishi, potassium sorbate.
Effets de la saison sur les qualités microbiologiques de Kilishi, une viande sèche traditionnelle du Cameroun
Fonkem, DN.,Tanya, VN.,Ebangi, AL.
Tropicultura , 2010,
Abstract: Effects of Season on the Microbiological Quality of Kilishi, a Traditional Cameroonian Dried Beef Product. The microbiological quality of Kilishi, a traditional Cameroonian dried meat, produced in the Northern part of the country, was studied over one-year period. 79 Kilishi samples collected at various selling points were used for microbiological evaluation. The results on the microbiological analyses were then subjected to a statistical analysis using the General Linear Model (GLM) approach to assess environmental factors that affect quality. Final results indicated that the quality of Kilishi was greatly affected (P< 0.001) by the season and location of production though the total bacterial, mould and yeast counts (cfu/g) were lower than the recommended acceptability limit for the total viable bacterial counts of micro-organisms in meat at the point of consumption.
Neurobehavioral Effects of Levetiracetam in Brain Tumor Related Epilepsy
Abigail Bernett,Richard Phenis,Ekokobe Fonkem,Jose Aceves,Batool Kirmani,Daniel Cruz-Laureano
Frontiers in Neurology , 2013, DOI: 10.3389/fneur.2013.00099
Abstract: The neurobehavioral profile of anti-epileptic drugs (AEDs) has been a recurrent research topic in the scientific literature. As pharmacological treatments for epilepsy continue to evolve, there is a general consensus that newer AEDs have less detrimental side effects in comparison to their older counterparts. Among newer AEDs and epilepsy patients, potential risk for neurobehavioral changes has been reported with levetiracetam (LEV). Conversely, limited data exists regarding the manifestation of this symptomatology in a subgroup of epilepsy patients with brain tumors. The current paper reviews the literature regarding the neurobehavioral profile of LEV in brain tumor related epilepsy and suggestions for future research will be discussed.
Efficacy and Tolerability of Intravenous Levetiracetam in Children
Jose Aceves,Owais Khan,Diana Mungall,Ekokobe Fonkem,Chanin Wright,Batool Kirmani
Frontiers in Neurology , 2013, DOI: 10.3389/fneur.2013.00120
Abstract: Intractable epilepsy in children poses a serious medical challenge. Acute repetitive seizures and status epilepticus leads to frequent emergency room visits and hospital admissions. Delay of treatment may lead to resistance to the first-line anticonvulsant therapies. It has been shown that these children continue to remain intractable even after acute seizure management with approved Food and Drug Administration (FDA) agents. Intravenous levetiracetam, a second-generation anticonvulsant was approved by the FDA in 2006 in patients 16 years and older as an alternative when oral treatment is not an option. Data have been published showing that intravenous levetiracetam is safe and efficacious, and can be used in an acute inpatient setting. This current review will discuss the recent data about the safety and tolerability of intravenous levetiracetam in children and neonates, and emphasize the need for a larger prospective multicenter trial to prove the efficacy of this agent in acute seizure management.
Between the Barrio and the City: Pathways of Work among Scavenging Families  [PDF]
Débora Gorbán
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.24024
Abstract: In this article, I will reconstruct, through brief stories, some of the traits that characterize the way of life of families in the El Salvador neighborhood, in Buenos Aires, Argentina, go scavenging everyday in Buenos Aires city. These stories will not only tell us who they are and how they arrived at the El Salvador neighborhood, from where, and in what manner they began to salir con la carreta, but will also permit us to move closer to the day-to-day existence of these families in relationship to their life in the barrio and the activities they engage in, thereby giving us a fuller understanding of family dynamics. In the research that originated this paper, I followed an ethnographical perspective to study and analyze the way of life of those families living from the recyclable waste they recollect in Buenos Aires city.
Dirichlet Averages, Fractional Integral Operators and Solution of Euler-Darboux Equation on Hölder Spaces  [PDF]
D. N. Vyas
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.714129
Abstract: In the present paper, we discuss the solution of Euler-Darboux equation in terms of Dirichlet averages of boundary conditions on H?lder space and weighted H?lder spaces of continuous functions using Riemann-Liouville fractional integral operators. Moreover, the results are interpreted in alternative form.
Third Order Current Mode Universal Filter Using Only Op.amp. and OTAs  [PDF]
G. N. Shinde, D. D. Mulajkar
Circuits and Systems (CS) , 2010, DOI: 10.4236/cs.2010.12011
Abstract: A novel current mode active-only universal filter using four dual current output Operational Transconductance Amplifiers (OTAs) and three Operational Amplifiers (OAs) is presented. The circuit can realize low pass and high pass filter characteristics by choosing the suitable current output branches. The filter performance factors natural frequency (ω0), bandwidth , quality factor Q and transconductance gain gm are electronically tunable. The proposed circuit has very low sensitivities with respect to circuit active elements. From sensitivity analysis, it has been clearly shown that the proposed circuit has very low sensitivities with respect to the circuit active elements. The gain roll-off of high pass and low pass configuration is 18 dB/oc- tave. The proposed circuit facilitates integrability, programmability and ease of implementation.
Effects of LiF on the Structure and Electrical Properties of (Na0.52K0.435Li0.045)Nb0.87Sb0.08Ta0.05O3 Lead-Free Piezoelectric Ceramics Sintered at Low Temperatures  [PDF]
P. D. Gio, N. D. Phong
Journal of Materials Science and Chemical Engineering (MSCE) , 2015, DOI: 10.4236/msce.2015.311003
Abstract: The (Na0.52K0.435 Li0.045)Nb0.87Sb0.08Ta0.05O3 (KNNLST) + x wt% LiF piezoelectric ceramics, where x = 0, 2, 4, and 6, have been fabricated successfully by the conventional solid-state reaction method. The effect of LiF on the sintering temperature, the structure and electrical properties of KNNLST ceramics was systematically studied. The LiF addition significantly reduced the sintering temperature of the ceramics from 1100℃ to 930℃. Experimental results showed that with the doping of LiF, all the ceramic samples could be well sintered and exhibit a dense, pure perovskite structure. With increasing LiF content, the tetragonal-orthorhombic transition point (TO-T) and the Curie temperature (Tc) of the ceramics shifted to the lower and higher temperatures, respectively. The specimens containing 4 wt% LiF sintered at 930℃ showed the good electrical properties: the density of 4.26 g/cm3; the electromechanical coupling factor, kp = 0.27 and kt = 0.40; the dielectric constant, ε = 744; the piezoelectric constant (d31) of 41 pC/N.
Characterization of the Organic Matter in the Formations with Juniperus phoenicea, and Pinus halepensis in the Matorrals of the Mostaganémois Littoral  [PDF]
N. Lahouel, N. Benabadji, D. Benmansour
Open Journal of Ecology (OJE) , 2014, DOI: 10.4236/oje.2014.45024

In the present work, we were able to verify the utility of splitting the organic matter that seems to be indispensable, especially when it comes to the soil humus which is very little polymerized and containing a large proportion of non-decomposed organic matter. This study even if it remains unfinished, it provides some useful information. Moreover, this work reflects the fundamental influence exerted by the organic matter as a soil and as a driving force of its dynamics. Humus factor in the vocation of a soil can promote or remove some plant species. The statistic analysis shows that the humification of the organic matter is faster on calcareous sandstone substrate (Calabrien) as on Tithonique Substrate with advanced cretaceous which can be explained by the very high rate of humic acids as the calcareous sandstone substrate. At the level of plant development, the organic matter provided by the mixed stands (Eucalyptus, Pinus halepensis, Juniperus phoenicea) with an undergrowth which is formed by (Retama monosperma,calycotome spinosa,Pistachia lentiscus, Phylaria latifolia, Lavandula stoecka) has a very god humification with a predominance of humic acids that indicate the acceleration of the development of clay-humic complexes and a permanent wealth of energy reserves.

Analytical Signal and Reduction to Pole Interpretation of Total Magnetic Field Data at Eppawala Phosphate Deposit  [PDF]
N. D. Subasinghe, W. K. D. G. D. R. Charles, S. N. De Silva
Journal of Geoscience and Environment Protection (GEP) , 2014, DOI: 10.4236/gep.2014.23023

A magnetic survey was carried out to find out the possibilities of demarcating a phosphate deposit from the surrounding country rocks. It is a well-established fact that the magnetic mapping can be utilised to investigate the subsurface objects, materials or different rock types based on their magnetic properties. Those rocks with ferro-magnetic minerals such as magnetite generate magnetic anomalies which in turn help to investigate the subsurface occurrence of mineral deposits. An economic phosphate deposit in Sri Lanka, known as Eppawala Phosphate deposit was selected for this study. The deposit was formed as an accumulation of secondary products of an apatite-rich carbonatite. Due to weathering of iron-rich carbonatite, magnetite and its derivatives are intimately bound with the said deposit. Therefore, the magnetic signature of the phosphate body is different to that of the surrounding country rocks. Despite some studies on different aspects of the deposit, subsurface extents of the ore body are so far not adequately studied. Therefore, this study was conducted to identify the boundaries of the phosphate body. The study was carried over an area of 12 km2 5 km north from the current mining site and survey was conducted. GSM-19 Overhouser system with integrated GPS was used to collect field data. Magnetic anomalies were plotted using a predefined grid. The maximum positive and negative anomalies encountered in the survey area are 690 nT and 829 nT respectively. This study showed that magnetite is not distributed evenly in the area and the deposit extended along the north south direction. Further, processing of analytical signal using the anomalies showed that the carbonatite occurs as a continuous body trending in North South direction. Low magnetic latitudes magnetic data interpretation is difficult because the vector nature of the magnetic field. Therefore, “reduction to pole” concept and “analytical signal concept” were used for the data analysis. Reduction to pole map and analytical signal map are comparatively similar and the change of declination value has no significant effect on the map of reduction to pole.

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