Tag Archives: Antimicrobial properties

Characterization and Antimicrobial Properties of Volatile Component of the Ethanol Leaf Extract of Momordica Charantia (Published)

GC-MS characterization of the leaf extract of Momordica charantia  was carried out with SHIMAZU Japan Gas Chromatography 5890-11 with a fused GC column OV 101 coated with polymethyl silicon (0.25 mm x 50 m) The initial phytochemical screening of the sample  revealed the  presence of alkaloids, saponins, flavonoids, phenols, steroids glycosides and tannins .the interpretation of the GC/MS spectrum revealed 13 absorption peaks Peak 1 was identified as Benzene  propanoic acid,with molecular weight of 150g and a molecular formula of C9H10O2.   Similarly, peak 2-13 were also identified as 1- Octadecyne, 1-Tridecyne,  Pentadecanoic acid methyl ester,  Hexadecanoic acid ethyl ester, n-Hexadecanoic, 11-Octadecanoic acid methyl ester, Phytol ,Oleic acid, 1-fluoro decane, E-9-Tetradecenal, 9-Octadecenal, 1-Pentanol-4-methyl-2-propyl with the following molecular weights; 250g,180g,270g,284g,256g,296g,296g,282g,160g,  210g, 266g,144g and molecular formula of C18H34.,  C13H24,  C17H34O2, C18H36O2.  C16H32O2, , C19H36O2 , C20H40O.  C18H34O2.  C10H21F. C14H26O. C18H34O.  C9H20O respectively. The leaf extract showed marked inhibition of some of the selected pathogens,. At concentrations of 200mg/cm3 , the extract  inhibited Staphylococcus aureus, 4mm, Trichophyton 2mm, Candida albican 4mm and streptococcus auerus 10mm  The minimum inhibition concentrations are 200mg/cm3 for trichophyton spp, 20mg/cm3 for Candida albicans, 100mg/cm3 for staphylococcus aureus and 50mg/cm3 for streptococcus aureus .

Keywords: Antimicrobial properties, Ethanol Leaf, Momordica Charantia, Volatile Component


Keywords: Antimicrobial properties, Chemical composition., Essential oil, Foeniculum vulgare mill.

Testing for NDVRL Using Nonparametric Kernel Method (Review Completed - Accepted)

Using the nonparametric “kernel methods” of curve fitting, a new approach is
taken for testing exponentiality versus net decreasing variance residual lifetime
(NDVRL). The test is proposed for complete and censored data. The Pitman’s asymptotic
relative efficiency to test for other classes is discussed. Selected critical values are
tabulated. Some numerical simulations on the power estimates are presented for the
proposed test. Numerical examples are presented for illustrative our test purpose

Keywords: Antimicrobial properties, Chemical composition., Essential oil, Foeniculum vulgare mill.