Browsing by Author "Iwu, Irenus Chinonye"

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    Chemical and medicinal properties of xylopia aethiopica harvested from the South Eastern Nigeria
    (U. P., 2022-01-30) Iwu, Irenus Chinonye; Ukaoma, Adanna A.; Alisa, Christopher; Ali, Bilah; Obiagwu, Ifeoma; Onu, Lynda Uchenna; Anozie, Remigius Chukwudi
    The characterization of chemical and medicinal properties of the leaf of Xylopia aethiopica was carried out with the aid of Shimazu Japan Gas Chromatography 5890-11 and GC-MS QP 2010 Plus Shimazu Japan. The chromatogram revealed 34 peaks which yielded 34 compounds with their molecular weights, structures and formulars elucidated. Initial phytochemical examination revealed the presence of alkaloid 4.3%, flavonoids 5.1%, properties. saponins 4.89%, tannin 2.2%s, cardiac glycosides and steriods. Antimicrobial determination revealed activity against selected human pathogens: Pseudomonas aeruginosa 10mm, Staphylococcus aureus 20mm, Streptococcus specie 22mm ,Aspergillus niger 16mm, Mucor specie 18mm and but was resistant to Klebsiella pneumonia. Most of the compounds identified in the leaf extract such as phytol.Vitamin E, Squalene, Caryophyllene oxide ans Isoaromadendrene epoxide has proven anti-cancer, anti-tumors, anti-inflammatory antioxidant and anti-arthritic properties
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    Chemo-remediation of crude oil polluted soils obtained from recent polluted site in oil producing environs in Rivers State Nigeria
    (eSciPub, 2019) Iwu, Irenus Chinonye; Onu, Uchenna Lynda; Nkwoada, Amarachi; Onwumere, Fidelis
    The chemo- remediation of crude oil polluted soils from recent pollution sites in oil producing environs in River state was carried out by both in vivo and in vitro methods using macro-soil nutrients ( Nitrate, Phosphate and Potassium) as index for remediation. The soil samples were labeled A, B, C, D1 to D6, sample A was obtained from pollution free site used as a control.Sample C was crude oil polluted soil not treated with surfactant, sample B was crude oil polluted soil leached with surfactant and not mineralized. Samples D1-D6 were polluted soil samples, leached with surfactant and mineralized with fertilizer. The samples were leached with linear alkyl benzene sulphonate (LABS) and later mineralized with Nitrate, Phosphate and Potassium (N.P.K) fertilizer and returned to the site of excavation to fallow for four months. The samples were later re-excavated and taken to the laboratory for analysis. Nitrate and phosphate contents were obtained with the aid of spectrum lab 725 UV visible spectrophotometer and potassium content was determined by use of a flame photometer. Results showed that sample A had nitrate concentration of 330ppm, sample B had concentration of 21ppm, sample C had a concentration of 54ppm while samples D-D6 had concentrations ranging from300ppm to 420ppm.Similarly, The phosphate concentrations were 68.50ppm, 17.00ppn, 28.00ppm and 48.80-136.40ppm for sample A, B, C.D1-D6 respectively. The potassium concentrations were not different as concentrations of 46ppm, 12ppm, 28ppm and 38ppm-64ppm was recorded for samples A, B, C, and D1-D6 respectively. These results revealed that crude oils not only renders soils unusable but also destroys the nutrient availability in soils. The soils can therefore quickly be reclaimed by leaching them with surfactants and mineralizing them with adequate inorganic fertilizer.
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    Isolation and characterization of 13 -benzyl ethyl methyl abietata from the leaf of pentaclethra macrophylla.(P.BENTH)
    (Bloomfield Academic Society, 2015) Iwu, Irenus Chinonye; Alisa, Christopher Onyemeziri; Onu, Uche
    As part of our study on the bioactive agents from Pentaclethra macrophylla tree, P.Benth (oil bean tree), 13- benzyl ethyl methyl abietate was isolated from its leaves. The structure was elucidated using spectra obtained from NMR spectroscopy in combination with IR and MS. its molecular formula is C26H32O2 with molecular weight 376, calculated for M/z 375.29. The IR spectrum showed absorptions of aliphatic carbon, (2924.85, 2855.09cm-1), carbonyl group, (1736. 68 cm -1), aromatic (1457.97 cm-1) and ether (1466.20 cm-1). The fragmentation pattern was also determined