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Now showing items 1-20 of 4195

2, 4, 6-Tris (N-Salicylidenehydrazino) S-Triazine and its Copper (II) Complex-Synthesis, Characterization and Antimicrobial Screening

Haile Kiros, Hadgu (Addis Ababa Universty, 2008-07)

A new tripodal ligand 2, 4, 6-Tris (N-Salicylidenehydrazino)-s-Triazine (L) was synthesized by the condensation of salicylaldehyde with 2, 4, 6-tris-(hydrazine)- s-triazine(THSTZ) in acetonitrile. Copper complex of the ...
2d Geometry of Quadrapole Magnetic field Lines from Neutron Star and Associated Radiation Pressure

Girma, Melkameshet (Addis Ababa University, 2011-06)

In this thesis we have derived the vector potential to determine the analytic expressions for the magnetic eld of dipole and quadrupole components of neutron star, we develop the eld line equations and the magnetic ...
A 2D Monte Carlo Investigation of Static and Dynamic Properties of Ring polymer

Admasu, Ashenafi (Addis Ababa University, 2015-02)

Monte Carlo simulation technique has been used to investigate the static properties and translocation characteristics of ring polymers in two dimensions. Each chain consists of exible linkage between monomers forming ...
2D Spin-Dependent Electron Scattering by Nanomagnets

Senbeta, Teshome (Addis Ababa University, 2012-02)

The 2D scattering problem of an electron by a magnetized nanoparticle is solved in the Born approximation with account of the dipole - dipole interaction of the magnetic moments of electron and nanomagnet. The scattering ...
3d Modelling for Urban Cadasteral Regestration,Management and Administration; The Case of Bahir Dar Town Ethiopia

Hamid, Ahmed (Addis Ababa Universty, 2016-06)

High rate of Population growth, coupled urbanization and industrialization results for high demand for land. In order to increase availability of land, the government of Ethiopia has introduced the construction of ...
9,9-Disubstituted Fluorene-Based Polymers: Preparation and Characterization

Hussen, Ayalew (Addis Ababa Universty, 2009-07)

A family of conjugated polymers based on 9,9-disubstituted fluorenes and cyanovinylenes were reported. The polymers were synthesized by employing a slightly modified Suzuki coupling polymerization reaction and condensation ...
AB Initio calculation of Optical Absorption and Optical Gap of Silicon Nanocrystallites

Gugsa, Derese (Addis Ababa University, 2007-07)

The electronic and optical properties of hydrogenated silicon nanocrystals have been investigated both in the ground- and in an excited-state configuration, through different ab-initio techniques. The presence of an ...
Absorption Coefficient and Dielectric function of direct Band Gap silicon Nanocrystallites

Gebrehiwet, Hagos (Addis Ababa University, 2007-07)

Silicon is an ubiquitous electronic material and the discovery of strong room temperature luminescence from porous silicon in 1990 raised hopes it may find a new lease of life in the emerging field of optoelectronics. ...
Abundance ; Composition and Habitat Association of Rodents in Wonji Sugarcane Area; Ethiopia

Takele, Serekebirhan (Addis Ababa University, 2006-06)

A study on the ecology of rodents was carried out in Wonji Sugarcane Plantation from August 2005 to March 2006. Three trapping grids were randomly selected in the sugarcane plantation based on the growth stage of the ...
Abundance and Diversity of Top Soil Earthworms in Relation to Chemical Use in Golden Rose Agrofarm, Tefki Area, Ethiopia

Mergia, Addisu (Addis Ababa University, 2007-07)

Despite the current environmental controversies, flower farms are becoming hot areas of investment in Ethiopia. Golden Rose Agro Farm is one of the largest, and the pioneer, flower industries in the country. To study ...
Abundance, Distribution and Insecticide Resistance of Anopheles Mosquitoes (Diptera: Culicidae) and Malaria Transmission Intensity in Relation to Agro-ecology in Sekoru District, Southwestern Ethiopia

Ejeta, Desta (Addis Ababa University, 2017-06)

Malaria is a leading cause of morbidity and mortality in several sub-Saharan African countries. Environmental/ecological changes due to anthropogenic activities are among the determinant factors for malaria transmission. ...
Ab–initio Calculations of Structural and Electronic Properties of a BexZn1-xSe Ternary Alloy

Mulualem, Getasew (Addis Ababa Universty, 2012-06)

We have used the ab-initio SIESTA code within the framework of DFT, LDA method to calculate the structural and electronic properties of BexZn1-xSe alloy for different compositions x = 0.0, 0.33, 0.66, and 1.0. The system ...
Acaia Byssinica Hochst. Exbenth: Pod and Seed Characteristics, Germination Physiology and Potentials for Seedling Establishment on Degraded Land

Haile, Berhank (Addis Ababa University, 1998-06)

This study was conducted on pod and seed characteristics, gel1ninalion physiology as well as the potentials of Acacia abyssinica Hochst. ex Benlll ssp. abyssinica fOI' growing on degraded land. Mature pods of A. ...
Acceptance and Use of E-Library Services in Ethiopian Universities: The Case of Addis Ababa and Adama Universities

Ali, Abinew (Addis Ababa University, 2010-07)

The introduction of new information and communication technologies in libraries during the last two decades has altogether changed the concepts of libraries where library patrons need not necessarily go to the library ...
Accretion Discs around magnetised Stars, in Particular Neutron Stars

Belay, Solomon (Addis Ababa University, 2010-02)

We develop a self-consistent theoretical model for the steady-state of an axisymmetric thin ac- cretion disc with an internal dynamo around a magnetised stars. Starting from the vertically integrated equations of ...
Accumulation of Certain Heavy Metals in Nile Tilapia (oreochromis niloticus) Fish Species Relative to Heavy Metal Concentrations in the Water of Lake Hawassa

Yirgu, Zenebe (Addis Ababa University, 2011-05)

The Tiliapia fish samples and water samples were collected from Lake Hawassa at three selected sampling sites namely Tikur Wuha, Dorie basana and Referral H. sites. The concentrations of certain heavy metals ( copper ...
Ace Plastion Oi\J Pola,Utons and Oetehmi Natio X Dielectric Perm!Rnvity and thickness Thin (,h2tt\l (semiconductor) films

Ahmed, Abdurahman (Addis Ababa University, 1989-06)

Su}~face pla817i\To~~'pol~n~itoriH (SP1P) whIch can be excited on dielectric/met~l (dielc(·trlc/semicouductor) interface can be used as highly sensitive non distructive probe for th" determination of tJ!e dielectric ...
Acomparative Study on the Efficacy of Some Ethiopian Traditional Taenicides As Tested on the Earthworm

Gesare, Geraldine (Addis Ababa University, 1993-06)

Intestinal parasitic infections represent serious medical and public health problems in many developing countries especially in the tropical regions. Taeniasis and cysticercosis have been recognized as important problems ...
Actinomycetes From Unexplored Environmental Niches in Ethiopia and Their Biotechnological Potentials for Antimicrobial Compound Production

Kibret, Moges (Addis Ababa University, 2018-06-04)

Actinomycetes have a widely recognized potential for the production of significant bioactive compounds. The major aim of this study was to isolate, screen and evaluate the biotechnological potential of selected actinomycete ...
Action of a Relativitic Charged Point Particle on Itself and other Charges

Tirfessa, Negussie (Addis Ababa University, 1992-06)

The different expressions for the Green function of electromagnetic field of a point charge have been considered with the special attention to the advanced contribution that is shown to be of importance for the self-action ...

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