Browsing Chemistry by Issue Date

VOLTAMMETRIC DETERMINATION OF ASCORBIC ACID IN GINGER USING GLASSY CARBON ELECTRODE

Mulunesh, Assaye (2017-10-11)

The oxidative behavior of ascorbic acid (AA) in Ginger Rhizome was studied at a glassy carbon electrode in 0.1 M Na2HPO4-NaH2PO4 buffer as a solvent and supporting electrolyte using cyclic voltammetry (CV), and square-wave ...

Phytochemical, Antioxidant and Antimicrobial Studies of Ethanolic and Methanolic Extracts of Aloe elegans Leaves gel

Halefom, Nigus (2017-10-11)

The present study aimed at investigating the phytochemical, antioxidant and antibacterial activities of the ethanolic and methanoli extracts of Aloe elegans leaves gel. The phytochemical screening revealed the presence ...

Synthesis, Structural Investigation and Assessment of Antibacterial Activities of New Cu (II) Complexes Containing 2, 2’-Bipyridine and 1, 10- phenanthroline

Etsana, Kiros (2017-10-11)

The discoveries of metal complex drugs are found to be more effective than parent drugs to overcome the microbial resistance towards antibiotics. This work involves synthesis, structural investigation and assessment of ...

GREEN SYNTHESIS OF COPPER OXIDE (CuO) NANOPARTICLES USING KHAT LEAF EXTRACT AND EVALUATION OF ITS ANTIBACTERIAL ACTIVIES

KIFLOM, G/MEDHN KELELE (2017-10-11)

In the present investigation a fast, convenient and environment friendly method has been used for the synthesis of copper oxide nanoparticles by biologically reducing 1 mMCuSO4 solution with extract of 2 % (m/v) of Khat ...

COLORIMETRIC DETERIMINATION OF Cr (VI) IN TANNERY EFFLUENT USING BIOLOGICALLY SYNTHESIZED SILVER NANO PARTICLE

ANTENEH, DEMELASH (2017-10-11)

COLORIMETRIC DETERIMINATION OF Cr (VI) IN TANNERY EFFLUENT USING BIOLOGICALLY SYNTHESIZED SILVER NANO PARTICLE

Synthesis and Investigations of Antibacterial Activities of New Mixed Ligand Complexes of Co (II) containing 1, 10-Phenanthrolineand 2, 2’-Bipyridine

Zerubabel, Moges (2017-10-11)

To overcome the alarming problem of microbial resistance to antibiotics, the discovery of metal complex drugs are found to be more effective than parent drugs to inhibit the microbial resistance to antibiotics.In this work, ...

SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITIES OF MONONUCLEAR COPPER (II) COMPLEX OF 1, 10-PHENANTHROLEIN AND ACITAMID LIGANDS

WONDIE, MEKONNEN (2017-10-13)

In this thesis, the synthesis, characterizations (conductivity measurements, melting point determination ,chlorideestimation,FT-IR, UV-Vis, ICP-OES) and biological activities of a new mononuclear copper(II) complex of the ...

Investigation of Total Polyphenolic Compounds, Antioxidant Activity and Determination of Some Selected Metals level on Dovyalisabyssinica (Koshem in Amharic) fruit grown inAmhara Region, Ethiopia

Berhanu, Tadesse (2017-10-13)

Dovyalisabyssinica (koshem in Amharic) is an endemic fruit in Ethiopia but now available in various countries in the world. However there is a paucity of information about some of its constituents. In this study,total ...

Assessment of the Level of Selected Metals in Chile Pepper and Soil samples fromFogera Woreda, SouthGondar,Ethiopia

Fasika, Molla (2017-10-13)

Pepper (Capsicum annuum)is a staple spice food for more than half of the population ofthe world. In Ethiopia, for example, it is the mostcommon and cultivated food species. In this work Flame Atomic Absorption techniquewas ...

GREEN SYNTHESIS OF SILVER NANOPARTICLES USING MANGO LEAF EXTRACT AND EVALUATION OF ITS ANTIBACTERIAL ACTIVITIES

AGEGNEHU, GASHAW (2017-10-13)

In the present investigation a fast, convenient and environment friendly method has been used for the synthesis of silver nanoparticles (AgNPs) by biologically reducing 30 ml of 4 mM AgNO3 solution with extract of 2 ml of ...

SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITIES OF NEW COBALT (II) MIXED-LIGAND COMPLEX CONTAINING 1, 10-PHENANTHROLINE AND ACETONITRILE

Kassahun, Fetwi (2017-10-13)

Coordination compounds play vital roles in biology, biochemistry and medicine. Thus, synthesis and study of new mixed ligand complex is very important. In this study a new Co (II) mixed ligand complex was synthesized using ...

CHARACTERIZATION OF NATURAL ZEOLITE FROM ETHIOPIA (HAMUSIT) AND ITS APPLICATION FOR HEXAVALENT CHROMIUM REMOVAL

Anisha, Hussien (2017-10-13)

The enhancingdemands for a healthy environment, particularly for the removal of pollutants from industrialand municipal wastewater, are a major reason to search for new materials.Zeoliteshave been reported as confident ...

EXCHANGEABLE SECONDARY NUTRIENT AND TRACE ELEMENT COMPOSITION OF SELECTED FERTILIZERS USED IN LASTA WOREDA, NORTH WOLLO ZONE, ETHIOPIA

DEMEKE, MELESSE (2017-10-13)

Essential secondary macronutrients ( Ca, Mg, S) and trace elements (Fe, Mn, B, Cl, Zn, Cu, Mo) present in relatively low concentrations in NPK fertilizers could be necessary for maintaining the life processes in plants. ...

PHYTOCHEMICAL ANALYSIS AND DETERMINATION OF ANTIOXIDANT AND ANTIMICROBIAL ACTIVITIES OF LEAF EXTRACTS OF Otostegia integrifolia(TINJUTE

YIKETEL, ADEGE (2017-10-13)

This study was conducted to analyze the major phytochemicals,to evaluate the antioxidant capacities by using, 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activities and ferric reducing antioxidant potential (FRAP)as ...

DETERMINATION OF TOXIC METALS (Ni, Pb, Cr & Cd) IN DIFFERENT BRANDS OF CHOCOLATES AND CANDIES MARKETED IN BAHIR DAR CITY, ETHIOPIA

Molla, Zewdie (2017-10-13)

Chocolates and candies are among sweet food items consumed primarily by small children. In present study, four toxic metals, cadmium (Cd), nickel (Ni), chromium (Cr) and lead (Pb) were determined in different brands of ...

INVESTIGATION OF ANTIOXIDANT AND ANTIBACTERIAL ACTIVITIES OF (Rosmarinusofficinalis) ROSEMARYLEAF EXTRACTS

TAREKEGN, BEYENE (2017-10-13)

The antioxidant and antibacterial activities of the extracts were determined by reducing activity assay. The phytochemical screening tests were done using defferent confirmatory tests pirior to quantitative determination. ...

Synthesis, Structural Investigation and Assessment of Antibacterial Activities of Mixed Ligand Complexes of Copper(II), 1,10-Phenanthroline and Adenide

Yilma, Shiferaw (2017-10-13)

Infectious diseases are still remains a crucial and challenging problem and metal-based drugs are found tobe morepotent than parent drugs to inhibit infection disease. In this work, Mixed ligand Cu(II) complexes containing ...

DETERMINATION OF PHENOLIC COMPOUNDS & THEIR ANTIOXIDANT ACTIVITIES IN ROOT EXTRACTS OF PLECTRANTHUS EDULIS (ETHIOPIAN POTATO) GROWN IN AWI ZONE

Desalew, Kassie (2017-10-13)

Plectranthus edulis (Ethiopian potato) which are cultivated in three different districts found in awi zone Amhara region (Ethiopia) were analyzed for the estimation of their total secondary metabolites (polyphenols and ...

COMPARATIVE STUDY ON ANTIMICROBIAL AND ANTIOXIDANT ACTIVITIES OF CRUDE EXTRACTS OF LEAVES OF Citrulluscolocynthis (YEMEDER EMBUAY)AND Justicaschimperiana (SIMEZA or SENSEL

TABOTE, KASAGN (2017-10-13)

The crude powdered leaves of these plants were extracted by 70%ethanol. J. schimperiana leaf extract had higher amount of yield (11.29 %) than C. colocynthis leaf extract (8.28%). The total flavonoid was higher inJ. ...

Synthesis and Assessment of Antibacterial Activities of a New Complexes of Ni (II) Containing 2, 2- Bipyridine, and 1,10-phenanthroline

Tewolign, Mitku (2017-10-13)

Designing coordination compounds by ligand tailoring with therapeutic abilities has become a fascinating research field. In this work three new 1, 10-Phenanthroline and 2, 2’-Bipyridine mixed ligand complexes of ...

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