Adama University

About: Adama University is a education organization based out in Nazrēt, Ethiopia. It is known for research contribution in the topics: Population & Adsorption. The organization has 840 authors who have published 1010 publications receiving 5547 citations. The organization is also known as: Adama Science and Technology University & ቴክኖሎጂ ዩኒቨርሲቲ, አዳማ ሳይንስና ቴክኖሎጂ ዩኒቨርሲቲ.

A Grid-Connected Distributed System for PV System

Abstract: Renewable energy like solar energy, wind energy and hydropower energy may be used to connect with grid-connected distributed system. The excess energy available by renewable energy sources may be supplied to grid and to get some positive cash flow. In this paper, application of power electronics has been explained and discussed and also providing some simulation results to be used with grid-connected distribution system. To achieve a reliable working of grid-connected distribution system, active and reactive power are suggested as compensation for decrease of grid voltage due to the reactive power injected to the grid. Absorption of reactive power has been accompanied with increase in active power injection. Also, increase in active power absorption has been accompanied reactive power injection. Rated active power has been supplied to the grid voltage. The active power injection has been decreased till minimum optimized value of active power being achieved.

Comparative Analysis of Phytochemicals Screening, Proximate and Elemental Analysis of Anacardium occidentale L. Nuts and Carica papaya Seeds

Abstract: Aims: The aim of this study was comparative analysis of phytochemicals screening, proximate and elemental analysis of Anacardium occidentale L nut and Carica papaya seeds extracts. Study Design: The samples were cleaned, washed with water, dried, and grinded with a laboratory mortar and pestle, packed in an air tight container and stored ready for further analysis. Place and Duration of Study: The research was conducted at the Chevron Biotechnology Centre, Modibbo Adamawa University of Yola, Nigeria which lasted for about three months. Methodology: The nuts were manually separated from fruit pulp, cleaned, washed with water, dried, roasted and grinded with a laboratory mortar and pestle, packed in an air tight container and stored ready for further analysis. Results: The result of Anacardium occidentale L nut phytochemicals screening showed that with Glycosides (-), Tannins (+), flavonoids(+++), Alkaloids(++), Saponins(-) and the proximate composition (%) were as follows: moisture content (9.7 ± 0.2), ash content (3.46±0.3), crude fat (26.79± 0.5), crude protein (14.26 ± 0.01) carbohydrate (by difference) (45.78± 0.01) Calorific (Energy) value 482.00 Kcal. The mineral analysis (mg/100g) revealed that magnesium (3.50 ± 0.01), Manganese (2.00 ± 0.01), Nickel (3.22 ± 0.01) and Cobalt (0.13 ±0.01) while the phytochemical screening for Carica papaya seeds extracts also showed Glycosides (+), Tannins (++), flavonoids(++), Alkaloids(++), Saponins(-) for the moisture content (8.59 ± 0.3), ash content (4.09±0.16), crude fat (15.60± 0.2), crude protein (15.84 ± 0.01) carbohydrate (by difference) (41.63) Calorific (Energy) value 1549.25 Kcal. The mineral analysis (mg/100g) revealed that magnesium (3.02 ± 0.02), Manganese (0.22 ± 0.01), Nickel (3.41 ± 0.01) and Cobalt (0.18 ± 0.01). Conclusion: The study therefore indicates that the Anacardium occidentale L nut and Carica may not provide all the nutrients required by human in the right proportion though it contains an appreciable quantity of some essential nutrients like Fats, Proteins, Carbohydrate and some minerals.

Statistical Evaluation of Compressive Strength in High Performance Concrete (HPC) with Steel Fiber Addition

Abstract: In this study, statistical analysis of High performance concrete (HPC) with steel fiber addition at 0.50, 0.75, 1.00, 1.25, & 1.50 % was evaluated each with a sample size (N) of 50 using 100 mm side cubes. Normality test and screening was done on the data set, frequency histogram with superimposed normal distribution curve plotted, as well as P-value compared with the significance level. Other parameters investigated were confidence interval and probability plot. It was seen that the data does not follow the normal distribution because the data float around the ideal normal curve, P-value is less than the significance level and Anderson-darling is high. An attempt was made to transform the data set for Goodness of fit using Johnson Transformation, and it was seen that the P-value significantly improved. Overall, an improvement in the mean compressive strength is observed with increase in fiber addition by utilizing large sample size.

Oat (Avena sativa L.) supplemented with fenugreek (Trigonella foenum-graecum L.) as a potential alternative for teff [Eragrostis tef (Zucc.) Trotter] for human nutrition in Ethiopia

Abstract: Teff is an important food crop in Ethiopia and mainly used for the production of injera, a flatbread considered the country’s national dish. But due to increasing demand of teff it is important to ...