J.M. Nzikou

Marien Ngouabi University, Brazzaville, Republic of the Congo · Sciences et Technologie Alimentaire

Cocoa, a widely cultivated crop in tropical countries, is a crucial raw material in the food industry, particularly in chocolate production. Its quality is influenced by various factors, including variety, cultivation practices, fermentation, and drying. The aim of this work was to investigate the impact of the cocoa variety on the merchant quality...

This paper identifies the medicinal plants used for the treatment of oxidative stress-related diseases by the Congolese population. The objective of the present survey is to list the major plants used in Congolese traditional folk medicine for the treatment of oxidative stress-related diseases as well as to review the phytogeographical distribution...

The impact of thermal and chemical pretreatments on the physicochemical, rheological, and functional properties of sweet potato flour was investigated. The chemical pretreatment consisted in dipping peeled sweet potatoes in 1 % (w/v) calcium chloride (CaCl2), while the thermal pretreatment was achieved by blanching them in tap water at 90 °C for 1...

The aim of the study was to investigate the physicochemical properties and the kinetics of degradation of Moringa oleifera seed oil during heating. The seed is a good source of oil (40%). The physical properties of the oil extracts showed the state to be liquid at room temperature and indicated that the oil had refractive index, 1.4680; the peroxid...

This study is part of a wider program on the development of oilseeds in the Congo Basin and its aim was to contribute to the knowledge of Irvingia smithii kernel by studying his chemical composition following the example of those of Irvingia gabonensis and Irvingia wombulu. Irvingia smithii kernel, like those of Irvingia gabonensis and Irvingia wom...

Nsinga kuata or Mbumba kua in local language is a vegetable. It pushes to the wild state. Outside its knowledge on the geographical distribution, one does not arrange the scientific information. The data of this study showed that the name of this vegetable is Cuervea isangiensis (De Wild.) N. Hallé. the physical features are: Length 15.32±0.22 cm;...

The aim of the study was to investigate the physicochemical properties and the kinetics of degradation of gumbo seed oil during heating. The seed is a good source of oil (23.27%). The physical properties of the oil extracts showed the state to be liquid at room temperature and indicated that the oil had refractive index, 1.4689; the peroxide value,...

The aim of the study was to investigate the physico-chemical properies and the kinetics of degradation of papaya seed oil during heating. The seed is a good source of oil (32%). The physical properties of the oil extracts showed the state to be liquid at room temperature and indicated that the oil had refractive index, 1.4680; the peroxide value, 0...

The aim of the study was to investigate the chemical composition and the kinetics of degradation of roselle seed oil during heating. The seed is a good source of oil (23.27%). The physical properties of the oil extracts showed the state to be liquid at room temperature and indicated that the oil had refractive index, 1.4652; the peroxide value, 3.1...

The seeds and seed oil of Terminalia catappa were analyzed to establish their chemical compositions and nutritional properties in order to investigate the possibility of using them for human and/or animal consumption. The seed is a good source of oil and protein; these were found to be 51.80% and 23.78% respectively. The seeds were found to be good...

Proximate composition, energy content and mineral concentrations of oil seeds which can be used in the preparation of Congolese diets were investigated. The paper also reports the physicochemical characteristics of the oil extracts from the seeds. Moisture content (on dry weight basis) was highest (9.45 ± 0.8%) in gumbo (Abelmoschus esclentus) seed...

Congo mango seeds w ere collected and the kernels were separated and dried. This study was carriedout on mango seed kernels to clarify their proximate composition and the characteristics of the extracted oilincluding unsaponifiable matter and fatty acid composition. Mango seed kernels contained a considerableunsaponifiable matter, and a low amount...

The aim of this study to characterization and the kinetics of degradation of the oil during heating on the seed and Sesame oil (Sesamum indicum L.). The results showed that the seed contained 5.7% moisture, 20% crude protein, 3.7% ash, 3.2% crude fiber, 54% fat and 13.4% carbohydrate. The seeds were found to be good sources of minerals. Potassium (...

The quality of soybean oil (SO) and refined palm oil (RPO), frying at 180oC for 12 h was investigated. The purpose of the study was to find out the quality deterioration of the two oils with respect to time as affected by fritters frying and to generate equations that can be used for predicting the quality parameters. The physicochemical characteri...

Proximate composition and physicochemical analyses were carried out on the seed and extractedoil of Annona muricata. The results showed that the seed contained 7.7% moisture, 8.5% crude protein, 9.7%ash, 5.2% crude fiber, 40% fat and 34.1% carbohydrate. The seeds were found to be good sources of minerals.Potassium (357.14±1.84 mg/100 g) was the hig...

Chemical and physical properties of mature gumbo (Abelmoschus esculentus L.) seeds fromImpfondo, in North Congo-Brazzaville were evaluated. The chemical properties evaluated were moisture, crudeprotein, crude oil, crude ash, crude fiber, and crude energy. The oil from A.esculentus seeds was extracted usingtwo oils extraction methods with petroleum...

In this study, the proximate composition and physicochemical analyses were carried out on the larvaand extracted oil of Rhynchophorus phoenicis. The results showed that the larva contained 0% moisture, 24%crude protein, 6.3% ash, 68.5% fat and 1.2% carbohydrate. The larvas were found to be good sources ofminerals. Sodium (832.59±0.5 mg/100g) was th...

The aim of this study to investigate the essential oil of the giant variety of lemon grass (Poaceae) obtained from farmers in Congo-Kinshasa and tested in Congo-Brazzaville. Chemical analysis, by GC and GCMS, of the essential oil from different parts of the plant, extracted at different stages of growth, revealed the very high stability of the citr...

Irvingia gabonensis seed kernels of two Congo Brazzaville localities (Ouesso and Sibiti) were analyzed for their main chemical composition. Studies were also conducted on properties of oil extracted from Irvingia gabonensis seed kernels and margarines. The following values were obtained for two seed kernels cultivars respectively: protein (8.33-8.7...

With the aim of diversifying the lipids sources eaten by the African populations and those of Congo Brazzaville in particular, a physicochemical study of Solanum nigrum L seeds was carried out and three chemical methods (Soxhlet, Bligh and Dyer, and Folch) were used to extract the oil. The dry matter content of the seeds is 94.22%. Average lipids c...

The quality of Soybean Oil (SO) and oil produced from the oil mixture of soybeanpalm (6:4) (MO), frying at 180°C for 12 h was investigated. The aim of the study was to find out the quality deterioration of the two oils with respect to time as affected by fritters frying and to generate equations that can be used for predicting the quality parameter...

Proximate composition and physicochemical analyses were carried out on the seed and Sesame oil (Sesamum indicum L.). The results showed that the seed contained 5.7% moisture, 20% crude protein, 3.7% ash, 3.2% crude fiber, 54% fat and 13.4% carbohydrate. The seeds were found to be good sources of minerals. Potassium (851. 35 ± 3.44 mg/100g) was the...

The seeds of Terminalia catappa were analyzed to establish their chemical compositions and nutritional properties in order to investigate the possibility of using them for human and/or animal consumption. Proximate analyses showed that the seed contained 4.13% moisture, 23.78% crude protein, 4.27% ash, 4.94% crude fiber, 51.80% fat, 16.02% carbohyd...

The oil from Jatropha curcas seeds variety "Congo-Brazzaville" was extracted using two oils extraction methods w ith petroleum ether (Soxlhet) and extraction with a mixture of chloroform:methanol (1:1) (Blye and Dyer). The oils were compared of Jatropha curcas other countries. The oil concentration ranged from 50% (Soxlhet) to 47% (Blye & Dyer). Th...

Solanum nigrum L. seeds have been subjected to standard analytical techniques in order to evaluate proximate composition, physicochemical properties and contents of nutritional valuable elements and fatty acids of the seeds and oils. Physicochemical analysis indicate that the oil content was 37.12?0.75 and 38.88?0.4 for Bligh and Dyer and Folch met...

Proximate composition, energy content and mineral concentrations of okra seeds grown in two locali-ties of Congo Brazzaville were investigated. The paper also reports the physicochemical characteristics of the oil extracted from the seeds. Ash was highest (5.84±0. 2%) in Dolisie okra seeds (DOS) followed by Brazzaville okra seeds (BOS) with a value...

Amaranthus hybridus is a vegetable which is eaten in Congo Brazzaville and in other countries. Two varieties of A. hybridus seeds (var 1 and 2) were selected for this study. Average oil content varies between 11 and 14%. A. hybridus seeds are also rich in proteins (17%) and minerals. Red oils obtained have a high saponification value (130-190) and...

The economic development of Safou fruit shows good prospects in some African countries. The fruit contains nearly 50% oil of high nutritional value and classic oil extraction could provide new markets for its exploitation. Iodine value, peroxide value and the content of thiobarbituric reactive species were measured over a period of 2 months, at fou...

Dacryodes edulis (safou) pulp oil has a high potential in Africa. But oil composition depends on fruit origin and ripening conditions. In the present study, the average safou oil extracted from raw fruits of mixed origin with those produced in the Guinea gulf are compared. The ratio of oil extracted by enzyme methods compared to the same extracted...

Safou (Dacryodes edulis) pulp oil became a new hope for fragile economics of central Africa countries. Raphia sese palm tree (Kolo) produces also an edible vegetable oil of well nutritious value. Various extraction methods were checked for the best yields. By soxhlet extractor using petroleum ether best yields were attained (47% for Safou and 52% f...

This paper presents the results of electrochemical investigations of the Ce(lii)/Ce(iv) couple, for use in a SO2/NOx abatement process. A voltammetric study was conducted at a platinum rotating disc electrode for the conditions corresponding to the gas scrubbing processes. The charge transfer coefficients were weakly affected by increasing the conc...