TY  - JOUR
T1  - Studies on Bioactive Metabolites Constituents and Antimicrobial Evaluation of Leaf Extracts of Eucalyptus Globulus
AU - , P.A. Egwaikhide AU - , S.O. Okeniyi AU - , E.E Akporhonor AU - , S.O. Emua 
JO  - Agricultural Journal
VL  - 3
IS  - 1
SP  - 42
EP  - 45
PY  - 2008
DA  - 2001/08/19
SN  - 1816-9155
DO  - aj.2008.42.45
UR  - https://makhillpublications.co/view-article.php?doi=aj.2008.42.45
KW  - Bioactive metabolites
KW  -antimicrobial evaluation
KW  -eucalyptus
KW  -globules
KW  -phytochemical screening
KW  -bacterial strain
KW  -bacterial strain
KW  -functional groups
AB  - Hexane, ethyl acetate and methanolic extracts of dried powdered leaves of Eucalyptus globulus were screened for basic secondary metabolites and antibacterial activity against <I>C. pyogenes</I>, <I>S. aureus</I>, <I>S. faecallis</I>, <I>B.  stearothermophilus</I>, <I> S.  epidermidis</I>, <I>B. cereus</I>, <I>B. polymyxa</I>, <I>K. pneumonia</I>, <I>P. aeruginosa</I>, <I>B. anthacis</I>, <I>B. subtilis</I>, <I>E. coli</I>, <I>P. fluorescens</I> and <I>C. sporogenes</I>. Phytochemical investigation of crude extracts of Eucalyptus globulus (leaf) revealed the presence of tannins, phlobatannins, saponins, flavonoids, steroids, terpenoids, cardiac glycosides and reducing sugar in the plant. The antimicrobial sensitivity of the extracts against  four  species  of  Gram-ve  and  ten  Gram+ve  bacterial stain for Eucalyptus globulus (leaf) revealed very high antimicrobial activity. The extracts of hexane, ethylacetate and methamol of Eucalyptus globulus (leaf) were all very active on almost all the bacterial strains. The Infra Red (IR) spectra revealed the presence of different functional groups ranging from OH (3406-3338.6 cm <SUP>1</SUP>) stretching, C-H (2926.6 cm <SUP>1</SUP>, 864.1 cm <SUP>1</SUP>) stretching   alkyl,    methyl    C = 0, (2162.1 cm )   anhydrides,   C = C (1697.6 cm <SUP>1</SUP>)   aromatic   ring  sretching, C-0 (1310.6-1059 cm <SUP>1</SUP>) alcohol, ethers, esters, carboxalic acid bending.
ER  -