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Browsing College of Natural Sciences by Author "Dagne, Ermias (PhD)"

Browsing College of Natural Sciences by Author "Dagne, Ermias (PhD)"

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  • Lakew, Shewaye (Addis Ababa Universty, 2011-07)
    In vitro study of the antifungal activity of essential oils, plant extracts with MeOH : CHCl3, pure compounds and, condensed smoke extracts were conducted using agar disc diffusion method. Out of these 14 showed strong, ...
  • Alemayehu, Gizachew (Addis Ababa Universty, 1982-06)
    As part of our attempts to synthesize Kosotoxin (1) simple synthetic procedures for the synthesis of related compounds !, ~,. 52,· shown below have been developed. Furthermore D and F which are key intermediates for the ...
  • Mammo, Wendimagegn (Addis Ababa Universty, 1982-06)
    In this project, the reactions of several functionalized compounds possessing the nicotine skeleton have been investigated. Studies also have been conducted on the cycloaddition reactions of C-pyridyl-h-methylnitrone with ...
  • Genet, Solomon (Addis Ababa Universty, 1990-06)
    The Ethylacetate extracts of the fermentation culture broths of c. coffeanum and Fusarium sp , gaveaphytot oxic a ndantibiotic compound identified as Brefeldin A and an uncharacterized an tibiotic compound respectively . ...
  • Asmellash, Senait (Addis Ababa Universty, 1991-12)
    Higher fungi collected from Central and Southern Ethiopia were investigated. The ethyl acetate extracts of submerged cultures of fifty fungi were screened for antimicrobial activity and lethality to brine shrimp (Artemia ...
  • Lemma, Bekele (Addis Ababa Universty, 1994-06)
    The ethyl acetate extract of the fermentation culture broth of Phellinus sp. gave two i compounds identified as3-chloro-4-methoxybenzaldehydeand 3,4-dimethoxybenzaldehyde. I Both 3-chloro-4-methoxybenzaldehyde and ...
  • Haile, Bisrat (Addis Ababa Universty, 1987-06)
    A gas chromatographic method was employed to monitor plasma levels of phenytoin and phenobarbital in 101 Ethiopian epileptic patients who were on chronic drug treatment and kinetics and plasma level-response relationship ...
  • Tesfai, zerom (Addis Ababa Universty, 1988-06)
    There are two indegineous Euclea species in Ethiopia of a total of nearly 20 species of Euclea in the world all of which are restricted to tropical and subtropical Africa, Eucl80 schimJ?erU (family Ebenaceae), known ...
  • Abebe, Gctachew (Addis Ababa Universty, 1999-03)
    Two species of Ocimum Species localiy known as 'Ajuban' and 'Besobla' are widely used in Ethiopia for fragrance and flavour purposes respectively. Until recently the two varieties were known botanically as 0. basilicum ...
  • Tesfaye, Tegene (Addis Ababa Universty, 1999-04)
    The genus Commiphora is one of the 20 genera belonging to the Bnrseraceae family. In the course of this study leaves and barks of five Commiphora species, for botanical identification , and resins of four of these species ...
  • M . Ndegwa, John (Addis Ababa Universty, 1994-06)
    Chemical investigation of the rhizome of Kniphofia fotiosa (Hochst), Asphodelaceae, led to the isolation of a minor product code named KKA-1 (40) . The spectral data suggested that it was a dimer of knipholone (32) and ...
  • Alemu, Melaku (Addis Ababa Universty, 1990-06)
    Chemical investigations on the leaves of A. berhana Reynolds, A. rivae Oaker, A. megalacantha Baker and A. pulcherdma ined. resulted in the isolation of a total of nine compounds, the structures of which were established ...
  • Mitiku, Solomon (Addis Ababa Universty, 1994-06)
    Three cytotoxic cytochalasins were isolated and characterized from Xylaria sp. (LEP-12) cultured on a sterile moist rice. The fungus grown on the above medium for 14 days at room temperature produced three cytochalasins, ...
  • Adefris, Belete (Addis Ababa Universty, 2008-07)
    Coffee is an important commodity culturally, commercially and economically in the world. Because of its consumption in most countries in the world, it is important to investigate the exact amounts of its chemical constituents. ...
  • Asefa, Abera (Addis Ababa University, 1995-06)
    The essential oils of the leaves of six Eucalyptus species (E. globulus Labill., E. citriodora Hooker, E. tereticornis Sm., E. viminalis Labill, E. robusta Sm. and E. camaldulensis Dehn) acclimatized in Ethiopia ...
  • Hailu, Solomon (Addis Ababa Universty, 1997-03)
    The essential oils of the leaves of Thymus species ( I vulgaris and T. schimperi) grown in different parts of Ethiopia were investigated using GC and GC-MS. The results indicated that T. vulgaris was rich in thymol (>40%) ...
  • Debella, Asfaw (Addis Ababa Universty, 1990-06)
    This thesis covers the phytochemical investi- gation of two Lupinus species (Lsguminosae), namely L, albus and L. princei. in. 2'-Hydroxydai-- 1 ' ' j : 1 f . i t » , ’ - ’ , , n,e, gP.nus"Lup^n_iJs:< , , ’ ‘ . 5 t ...
  • Dinku, Bekele (Addis Ababa Universty, 1987-06)
    The Chloroform extract of Tephrosia pumila ( Lam.) Pers. (Leguminosae) revealed the presence of eight flavonoids. Out of t,hese three flavonoids were isolated. The major component was identified as the known praecansone ...
  • Melese, Asmare (Addis Ababa Universty, 2007-07)
    The genus Boswellia is one of the 17 genera belonging to Bureseraceae family. In the course of this study leaves and barks of Boswellia species and its resins were collected from Kebtele area for botanical identification and ...
  • Dekebo, Aman (Addis Ababa Universty, 1997-06)
    The family Burseraceae with 17 genera is widely distributed in tropical and subtropical countries. The genus COlllllliphora comprises 150-200 species and B05wellia 20 species. Gum exudates of some COlllllliphora and ...

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