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Inhibition studies of Spondias mombin L. in 0.1 HCl solution on mild steel and verification of a new temperature coefficient of inhibition efficiency equation for adsorption mechanism elucidation

100%
Magu T. O., Bassey V. M., Nyong B. E., Obono O. E., Nzeata-Ibe N. A., Akakuru O. U.
World News of Natural Sciences
|
2017
|
vol. 8
15-26
EN
This research investigated the inhibition behavior of Spondias mombin leaf (SML) extracts in 0.1 M HCl solution on mild steel at various concentrations and temperatures. The result reveals that the inhibition efficiency of the extract on the mild steel sheet increases with increasing concentration of the extract and decreases with increase in temperature. Therefore, the adsorption mechanism of the extract on the mild steel surface is physical. Calculated Correlation Coefficient (R2) values show that the process follows a Freundlich adsorption isotherm. The proposed temperature coefficient equation of adsorption mechanism was found to be appropriate.
2
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Nutritional Composition, Minerals, Vitamin C and Antioxidant Analysis of Yellow Mombin (Spondias mombin L.) Nut

100%
Odokwo E. O., Uzoekwe N. M.
World News of Natural Sciences
|
2024
|
vol. 53
86-93
EN
The nutritional, mineral, Vitamin C and antioxidant capacity profiling of the nut of Spondias mombin has been carried out. The nut of S. mombin (NSM) was extracted from its fruit and then profiled quantitatively for its nutritional, mineral and vitamin C contents using the AOAC standard procedures. The antioxidant capacity of the methanol extract of NSM was carried out using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical assay and ferric reducing antioxidant potential (FRAP) techniques. The nut was found to have nutritional facts of: moisture content (12.24±0.06%), lipid content (1.69±0.01%), fibre content (45.27±0.32%), protein content (5.69±0.04%), ash content (0.41±0.02%) and carbohydrate content (34.70±0.33%). The mineral content in mg/g of sample was found to contain: K (7.014), Na (2.966), Ca (1.333), Mg (0.690), Fe (0.131), Cu (0.079), Zn (0.015), Cd (0.004) and Cr (0.009). Pb was not detected. The vitamin C content was 3.89 mg, DPPH antioxidant potential increases as concentration of NSM increases from 25.00 µg/ml to 400 µg/mL and FRAP was observed at 400 μg/ml NSM to be 75.304±0.002 mgAAE. The nut of S. mombin has shown to be good sources for alternative nutrition and as a base for minerals rich in cellular ions. The nut of S. mombin has exhibited antioxidant capacity which can be attributed to the presence of some vital phytoconstituents.
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Pollen analysis and heavy metals detection in honey samples from southern Nigeria

58%
Adekanmbi O. H., Walter O. J., Ikegbunam N. C.
World News of Natural Sciences
|
2019
|
vol. 26
176-190
EN
Pollen analytical study of two locally produced honey samples collected from Akwa Ibom and Cross River State, Southern Nigeria were carried out in order to ascertain the preferentially foraged plants by honey bees, as well as the concentration of heavy metals. Samples were subjected to standard laboratory procedures using an acetolysis mixture (pollen analysis) and atomic absorption spectrometry (heavy metals). The results from the analysis revealed 32 taxa belonging to 17 botanical families. The number of pollen grains in the honey samples varied significantly (between 4,887 - 12,755 pollen grains), indicating their richness in pollen grains. 12 elements - Ni, Cu, Zn, Se, Br, K, Ca, Ti, Cr, Mn, Rb, and Fe were detected. Potassium had the highest concentration, followed by iron, calcium, titanium, zinc, copper, chromium, nickel, among others. What is more, in this study, some important honey plants: Spondias mombin, Daniella oliveri, Manihot esculenta, Treculia africana, Syzigium guineensis, Diospyros mespiliformis, Parkia biglobosa, Terminalia superba, Senna hirsuta, among others were found to be predominant and have been identified to be characteristic of the vegetation typical of Southern Nigeria. With regard to honey, this study gives an indication of the geographical and botanical origins, as well as types, source, and degree of contamination, and also an overall measure of honey purity. Such information, when displayed, can help consumers make informed decision when purchasing honey and will also help beekeepers to avoid possible contamination. Moreover, it will assist regulatory agencies in taking proper measures for environmental and consumer protection, since the concentration of heavy metals in honey is influenced by environmental pollution.
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