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Articles by Ugbogu Eziuche Amadike
Total Records ( 2 ) for Ugbogu Eziuche Amadike
  Ogbonna Chidi Enyinnaya , Ikpeazu Victor Okezie , Emmanuel Okezie , Uzor Uzoma Evangeline and Ugbogu Eziuche Amadike
  Background and Objective: Ageratum conyzoides L. (Asteraceae) is nutrient compliant weed used as forage for grazing animals. It is used in the treatment of various ailments such as wounds, diabetes, pneumonia, asthma and stomach upset. This present study investigated the influence of quarrying on the nutritional composition, heavy metals and oxidative stress indices of the leaves, stem and root of Ageratum conyzoides. Materials and Methods: The various parts of Ageratum conyzoides harvested from a quarry site were compared with those harvested from a non-quarry (control) environment. Phytochemicals, proximate, mineral compositions as well as heavy metals, oxidative stress and air pollution tolerance index were investigated using standard analytical methods. Results: The results from this study revealed greater amount of alkaloid, saponins and flavonoids in the leaf, stem and root from the quarry site when compared to the control site. The micromorphological foliar revealed constricted venial and stomatal deformed guard cells on the quarry site when compared to the control. There were increased levels (p<0.05) in ascorbic acid, air pollution tolerance index (APTI) and pH in the samples collected from the quarry site, while percentage relative water and chlorophyll contents significantly decreased (p<0.05) in the quarry site when compared to the control. Conclusion: The results show that quarry mining activities induced biochemical stress and increased health promoting phytochemicals in Ageratum conyzoides.
  Ogbonna Chidi Enyinnaya , Ude Victor Chibueze , Ugbogu Ositadinma Chinyere , Emmanuel Okezie , Nnorom Innocent Chidi and Ugbogu Eziuche Amadike
  Background and Objective: Physiological and biochemical changes in plants are indicators used for monitoring cellular activity of plant prior and post exposure to harsh environment. This study investigated the impact of quarrying and stone crushing activities on heavy metals, plant nutritional composition, phytochemicals and oxidative stress indices of Aspilia africana. Materials and Methods: Different parts of A. africana were collected from the quarry site and compared to those growing from non-quarry mining environment. Results: The result shows that A. africana from quarry mining site had significant (p<0.05) increase in phenol, tannin, alkaloid, saponin, flavonoid, Mg2+, Na+, Fe2+, Cu2+ and Zn2+ levels when compared to that of control site. Ascorbic acid, chlorophyll and Air Pollution Tolerance Index (APTI) level significantly (p<0.05) decreased in the quarry site. The photomicrograph of the A. africana leaves from the quarry site demonstrated a squeezed venial arrangement, necrotized surface, closed stomata and compressed vein. Conclusion: The result suggests that quarrying and stone crushing activities may induce oxidative stress on A. africana. Based on its APTI rating, A. african can be used in the monitoring of air pollution. The results revealed that quarrying and stone crushing activities increased health promoting phytochemicals and some minerals of A. africana growing around the quarry environment.
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