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Brazzaville, Republic of the Congo

Marien Ngouabi University is the only state-funded university in the Republic of Congo. It is located in the capital of Brazzaville. Wikipedia.

Yoca S.E.,Marien Ngouabi University | Quinet P.,University of Mons | Quinet P.,University of Liege
Journal of Physics B: Atomic, Molecular and Optical Physics | Year: 2014

A pseudo-relativistic Hartree-Fock model including a large amount of configuration-interaction effects has been used to compute radiative decay rates for allowed and forbidden transitions in Nd IV. Detailed comparisons of transition probabilities, oscillator strengths and radiative lifetimes with data previously published are also reported and discussed in the present work. © 2014 IOP Publishing Ltd.

N'Goka V.,Marien Ngouabi University | Julien-David D.,University of Strasbourg
American Journal of Food Technology | Year: 2012

The triacylglycerols and fatty acids composition of the oils of the Bellicositermes natalensis Haviland obtained from two different regions of Congo were qualitatively and quantitatively determined by gas chromatography/SM. This insects contained oil in the range of 48-53% dry matter, comparable with oleaginous plants like palm tree (45-50%), peanut (45-54%), more than soya (18-25%) and sunflower (22-50%). Levels of lipid content probably could be considered sufficient for economic industrial exploitation for every usage like human's consumption and medical usages. The pre-dominant triacylglycerol was palmitoyl-Oleoyl-Palmitoylglycerol (POP), 15.6-19.2%; followed by Palmitoyl-Oleoyl-Stearoylglycerol (POS), 14.6-18.1%, the minor were stearoyl-oleoyl-stearoylglycerol (SOS), 1.7-1.9%. The pre-dominant fatty acid was oleic (C18:l) and its content was about 57-60%, followed by palmitic acid (28-30%), stearic acid (9-11%), palmitoleic acid (3.5-4.0%), myristic acid (0.4%) and undetermined acid (0.2%). High qualitative similarity with butter fatty acids composition was observed and more, the content of this oil in monounsaturated fatty acids (60.5-62.5%), is near of the favourite olive oil which is 67.2%. © 2012 Academic Journals Inc.

Yoca S.E.,Marien Ngouabi University | Quinet P.,University of Mons | Quinet P.,University of Liege
Journal of Physics B: Atomic, Molecular and Optical Physics | Year: 2013

Transition probabilities and oscillator strengths for electric dipole radiation in triply ionized praseodymium are reported for the first time in this paper. They were computed using a semi-empirical relativistic Hartree-Fock approach including core-polarization effects. Due to the lack of experimental data in the Pr IV spectrum, the accuracy of our results is estimated and discussed on the basis of comparisons between calculations performed with a similar physical model and laboratory measurements previously published for the isoelectronic ion Ce2+. In view of their great interest in optical materials and nanophotonics, radiative rates for forbidden lines within the 4f2 ground-state configuration of Pr3+ were also calculated in our work. © 2013 IOP Publishing Ltd.

Kongo-Dia-Moukala J.U.,Jiangnan University | Kongo-Dia-Moukala J.U.,Marien Ngouabi University | Zhang H.,Jiangnan University
American Journal of Food Technology | Year: 2011

A number of operating parameters including temperature, pH, solvent/flour ratio and time influence the yield of protein during extraction. In order to effectively identify the good combinations of the extraction conditions, Response Surface Methodology (RSM) was employed to determine optimum conditions for extraction of protein from defatted corn. The coefficient of determination (0.9789) was good for the second-order model. Protein extraction from defatted corn was mainly affected by pH and solvent/flour ratio. From RSM-generated model, the optimum extraction conditions were 54°C, 11.55, 1:18 and 33 min for temperature, pH, solvent/flour ratio and time, respectively. Under these conditions, the experimental protein content was 69.25 mg mL -1 which agreed closely with the predicted value 71.23 mg mL -1. To ensure that the protein extract could be utilized for food application, some functional properties such as water holding capacity, oil holding capacity, emulsifying capacity, foaming capacity and foaming stability were evaluated. Defatted corn protein had a good water holding and foaming capacity. Thus, it can be used in food formulation systems. © 2011 Academic Journals Inc.

Mayengue P.,Marien Ngouabi University | Ndounga M.,Center dEtudes sur les Ressources Vegetales | Malonga F.,Marien Ngouabi University | Ntoumi F.,University of Tubingen
Malaria Journal | Year: 2011

Background: The characterization of malaria parasite populations circulating in an area is part of site characterization, as a basis for evaluating the impact of malaria interventions on genetic diversity, parasite species, and multiplicity of infection. The present study was aimed at analysing genetic diversity of Plasmodium falciparum merozoite surface proteins 1 and 2 (MSP-1 and MSP-2) and to determine the multiplicity of infection in clinical isolates collected from children living in the Southern district of Brazzaville in the Republic of Congo. Methods. A total of 125 isolates from patients with uncomplicated malaria attending Terinkyo and Madibou health centres were collected between January and June 2005 while evaluating the therapeutic efficacy of amodiaquine-artesunate combination. DNA was extracted and msp-1 and msp-2 genes were genotyped using allele-specific nested-PCR. Results: Out of 468 distinct fragments detected, 15 msp-1 and 20 msp-2 genotypes were identified. For the msp-1 gene, K1 family was the predominant allelic type carried alone or in association with RO33 and Mad20 types, whereas the 3D7 family was the most prevalent in the msp-2 gene. Overall, the mean multiplicity of infection was 2.2. Out of 125 samples, 104 (83%) harboured more than one parasite genotype. There was no statistical significant difference in the multiplicity of infection by either sex or age of patients. However, a statistically significant correlation was found between parasite densities and the number of genotypes. Conclusion: Polymorphism in P. falciparum clinical isolates from Brazzaville was high and mainly of multiple clones. The basis for the positive association between parasite densities and multiplicity of infection is discussed. © 2011Mayengue et al; licensee BioMed Central Ltd.

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