Artificially bred triploid fingerlings of Heterobranchus longifilis (9.9 + 2.25) were fed 5% body weight with four different formulated diets (35, 40, 45 and 50% crude protein) for 56 days. Data taken include weight gain, average daily weight gain., specific growth rate and food conversion ratio. Weight gain increased as the dietary protein level increases but no significant differences (P > 0 ...

Experiments were conducted using dry tobacco (Nicotiana tobaccum) leaves aqueous extract to determine the acute toxicity and sub lethal effects on some haematological indices of Oreochromis niloticus using static renewable bioassay method. The extract was found to be toxic with a 48-h LC50 value of 109.6 mg/l. Sub lethal concentrations of the extract were found to have an inverse relationship ...

This paper describes the in vitro evaluation of antibacterial activity of DNBH and its ruthenium complexes. All the synthesized compounds exhibited antibacterial activity against the Gram-positive bacteria namely Staphylococcus aureus at a conc of 100-25 mg/ml and Gram-negative bacteria such as Escherichia coli, Salmonella typhi and Pseudomonas aeruginosa at a conc of 1µg/ml. All the metal com ...

The prevalence of airborne mycobiota at six different regions of Western desert (5 regions) and Eastern desert (1) of Egypt was determined using the exposed-plate method. A total of 44 genera, 102 species and one variety in addition to some unidentified yeasts and dark sterile mycelia were collected. Of the above, only 5 species were isolated from the 15 exposures (5 plates each, 30 minutes ex ...

The microflora associated with the root-surface of five tomato cultivars commonly cultivated in Edo State Nigeria, was investigated by inoculating serially washed 5 mm tomato root segments on potato dextrose agar (PDA) incubated at room temperature (28-30oC). Fusarium oxysporum and Ralstonia (pseudomonas) solanacearum together with Botryodiplodia theobromae, Trichoderma koningii and Aspergillu ...

The existence of pathologic population of Onchocerca volvulus as the basis of their ability to cause blinding and non-blinding onchocerciasis has already been recognized. However, documentation of molecular characterization in Nigeria which is one of the most affected country in the world is incomplete and fragmentary. Molecular characterization of O. volvulus in Lade District of Kwara State, ...

The fish and fisheries of the Lower Volta mangrove swamps were studied to provide data for the formulation of management strategies to sustain utilisation of the fishery resources in the area. Thirty-eight finfishes and 14 shellfishes species were encountered during the study period. Gerres melanopterus, Clarias anguillaris, Liza falcipinnis, Mugil curema and Sarotherodon melanotheron were the ...

A total of 62 bacterial strains (50 from Sahelian areas in Senegal, 3 from Mauritania, 8 from Mediterranean areas in Tunisia and 1 from Burundi) obtained from under Acacia raddiana trees, were compared with 51 reference strains of Rhizobium, Bradyrhizobium, Azorhizobium, Sinorhizobium and Agrobacterium. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDSPAGE) of proteins was used to ...

Résumé La zone de l\'étude est un bassin versant expérimental et de recherche d\'une superficie d\'environ 50 km². Il constitue l\'aire d\'influence d\'une petite rivière (la Néma), une des innombrables vallées qui incisent le plateau continental terminal du basin sédimentaire sénégalomauritanien. Situé au centre-ouest du Sénégal, ce bassin de trouve en pleine zone soudano-sahélien qui connaît ...

This paper presents the theoretical analysis of a simplified model of a ram press. The design of the ram press is based on the classical slider-crank mechanism. A force analysis of the press was performed for several successive positions of the driving lever (handle) and for a range of values of certain dimensionless parameters that influence the performance of this mechanism. Because the ram ...