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Articles by Dzudie Tenin
Total Records ( 3 ) for Dzudie Tenin
  Ahmed Ali , Dodo Ahmadou , Bouba Adji Mohamadou , Clement Saidou and Dzudie Tenin
  Traditional fishing and fish processing are a very important activities around the Lagdo lake, Cameroon. This study was carried out to investigate the influence of traditional fish processing on the nutritional and microbiological qualities. To this effect, some physico-chemical characteristics (moisture, proteins, fats, TBA index, total ash, minerals) were determined for fresh, smoked-dried and sun dried flesh of three fish species (Tilapia nilotica, Silurus glanis and Arius parkii) while food-spoilage and pathogenic microorganisms (Escherichia coli, Staphylococcus aureus, fecal streptococci, sulfite-reducing clostridia and moulds) were screened on the same samples. Results showed that moisture content varied between 81.49±0.35 and 84.33±1.28 g/100 g for fresh fish; between 7.58±1.13 and 8.95±1.73 g/100 g for smoked-dried fish and between 11.5±0.71 and 14.06±2.11 g/100 g for sun-dried fish. For total ash, values as high as 8.13±1.55-9.86±0.24 g/100 g were recorded in smoked-dried fish while much lower values were obtained for fresh fish. With regard to protein contents, fresh fish had lower amounts between 18.81±1.55 and 21.23±1.50g/100 g while smoked-dried had the most important protein content between 69.10±2.94 and 75.72±3.66 g/100 g. All fresh fish samples showed lower fat contents than sun-dried and smoked-dried samples. Most minerals were significantly increased by sun-drying and smoking-drying. All samples appeared to be of poor microbiological quality since Escherichia coli, Staphylococcus aureus, fecal streptococci, sulfite-reducing clostridia and moulds were detected at concentrations above recommended norms.
  Ahmed Ali , Dodo Ahmadou , Bouba Adji Mohamadou , Clement Saidou and Dzudie Tenin
  This study was carried out to investigate the impact of pollution of water and sediments on fish mineral and heavy metal load in Lagdo lake, Cameroon. Samples of water, sediments and 3 fish species were analyzed quantitatively for the presence of potassium (K), magnesium (Mg), sodium (Na), zinc (Zn), nickel (Ni), Cadmium (Cd) and lead (Pb) were determined using Atomic Absorption Spectrometer (AAS 50B, Australia). Results showed that major elements (K, Mg, Na) were detected in concentrations between 0.02±0.00 and 0.19±0.01 mg mL-1 in water between 0.15±0.01 and 10.95±0.08 mg g-1 in sediments and between 0.25±0.01 and 5.35±0.12 mg g-1 in different fish organs. For heavy metals (Zn, Ni, Cd and Pb), variable amounts were determined and were 0.68±0.07 to 4.96±1.23 μg mL-1 in water, 0.12±0.01 to 21.35±1.42 μg g-1 in sediments and 0.22±0.01 to 18.50±0.20 μg g-1 in fish organs. The sediment contained higher concentrations of minerals and heavy metals than water. The 3 fish species accumulated mineral and heavy metals with all elements most concentrated in the heads.
  Divine Nde Bup , Charles Fon Abi , Dzudie Tenin , Cesar Kapseu , Clerge Tchiegang and Zephirin Mouloungui
  The shea tree produce sheanut kernels from which shea butter is extracted. The average dimensions of the kernels are 4 cm in length and 3 cm by width. Due to its big size (4x3 cm), natural sun drying of kernels is not. Drying tests carried out in an empty indirect solar dryer, gave temperatures above 60C but were reduced to about 50-55C when loaded. At airspeeds of 1 and 1.4 m sec-1 there was no significant difference in the moisture contents of the samples on the different trays. The acid and peroxide values of the butter indicated that butter obtained from the dried kernels could be classified either as category 1 or 2 butter irrespective of the drying conditions to which the kernels were subjected. Hence, the indirect solar dryer can be used to produce butter of recommended properties for cosmetics, pharmaceuticals and in food.
 
 
 
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