Asian Journal of Chemical Sciences https://journalajocs.com/index.php/AJOCS <p style="text-align: justify;"><strong>Asian Journal of Chemical Sciences (ISSN: 2456-7795)</strong> aims to publish high quality papers (<a href="/index.php/AJOCS/general-guideline-for-authors">Click here for Types of paper</a>) in all aspects of Chemical Sciences. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer reviewed, open access INTERNATIONAL journal.&nbsp;</p> SCIENCEDOMAIN international en-US Asian Journal of Chemical Sciences 2456-7795 The Impact of Galena Mining in North-Eastern Nigeria on Nearby Food Crops https://journalajocs.com/index.php/AJOCS/article/view/19031 <p><strong>Aims:</strong> To investigate and evaluate trace elements concentration in soils and bioaccumulation on food crops grown on agricultural fields around galena mine area, Wukari, north eastern Nigeria.</p> <p><strong>Study Design:</strong> The studied area is situated in the northwestern part of Wukari Local Government Area of Taraba State, North-East Nigeria. The hydrology of the area is conducive for the cultivation of crops and fresh water for fishing. The soils and food crops samples were collected in the month of May, 2018.</p> <p><strong>Methodology:</strong> Edible parts of plants such as leaf, stem and seed were collected from Soybeans (<em>Glycine max</em>), Guinea corn (<em>Sorghum bicolor</em>), Millet (<em>Penniselum typhoides</em>), Spinach (<em>Amaranthus</em>) and Tomato (<em>Lycosipinus esculentum</em>). A 1.00 g of the finely ground soil samples were digested with 10 mL of aqua regia (a mixture of 1:3 HNO<sub>3</sub>/HCl v/v) at 70°C on hot plate for 3 hours in a fume hood and 1.00 g of each sieved plant samples were digested with 10 mL mixture of HNO<sub>3</sub>: HCIO<sub>4</sub> in the ratio 5:1 at 90°C for 30 minutes in a fume cupboard.</p> <p><strong>Results:</strong> The concentrations (µg/g DW) of the trace elements in soil are in the order Mn &gt; Fe &gt; Se &gt; Pb &gt; Cr &gt; Cu &gt; Al &gt; As. The bio-accumulation of trace elements in all food crops were in the range: Se (0.250 – 20.88 µg/g DW), Al (0.250 – 0.980 µg/g DW), As (0.070 – 0.620 µg/g DW) and Pb (0.020 – 0.090 µg/g DW). Cr, Cu, Pb, Mn concentrations in food crops were above FAO/WHO permissible limits of 2.30, 40.0, 0.30, 500 µg/g DW respectively.</p> <p><strong>Conclusion:</strong> The Health Risk Index of As, Cr and Fe in spinach and Guinea corn were &gt; 1. The study revealed that food crops grown on farmlands around mining areas are not safe for consumption.</p> G. G. Yebpella A. M. Magomya R. Odoh N. H. Baba J. Yakubu ##submission.copyrightStatement## 2020-06-16 2020-06-16 1 14 10.9734/ajocs/2020/v8i119031 One Pot Synthesis of Cu(II) and Ni(II) Peroxo Complexes Containing Schiff Base: Physicochemical, Spectral and Antibacterial Investigations https://journalajocs.com/index.php/AJOCS/article/view/19032 <p>Two new peroxo complexes of Cu(II) and Ni(II) ion containing Schiff base (SB) were synthesized and characterized by TLC, Elemental analyses, conductivity, magnetic moment measurements, UV-Vis. and IR and ESI-MS spectral studies. The Schiff base ligand derived from cinnamaldehyde and <em>o</em>-aminophenol participated in complexation through a single pot reaction. IR spectra showed that the Schiff base ligand coordinated to the metal ion through nitrogen of azomethine group and oxygen of hydroxyl group &amp; peroxo group (O-O). Magnetic moment value coupled with electronic spectral data suggested a square planar geometry for both the complexes. The molar conductance values indicated the non-electrolytic nature of the complexes. Antibacterial activity of the complexes was tested against four pathogenic bacteria, two Gram-positive<em> Staphylococcus aureus </em>&amp;<em> Bacillus cereus</em> and two Gram-negative <em>Escherichia coli </em>&amp; <em>Shigella dysenteriae </em>with <em>Kanamycin (K-30)</em> standard. The result shows that Cu(II) complex exhibited more potential antibacterial activity than the Ni(II) complex against all the tested organisms.</p> Md. Mahasin Ali Md. Nur Amin Bitu Md. Saddam Hossain Md. Faruk Hossen Md. Ali Asraf Md. Akhter Farooque Md. Kudrat-E- Zahan ##submission.copyrightStatement## 2020-06-23 2020-06-23 15 21 10.9734/ajocs/2020/v8i119032 Synthesis, Chracterization and Antibacterial Activity of Cd(II) and Zr(IV) Peroxo-complexes https://journalajocs.com/index.php/AJOCS/article/view/19033 <p>Two new peroxo-complexes of Cd(II) and Zr(IV) ion containing Schiff base (SB) were synthesized and characterized by Thin Layer Chromatography (TLC), Elemental analyses, conductivity, magnetic moment measurements, UV-Vis. and FT-IR spectral studies. The Schiff base ligand derived from cinnamaldehyde and <em>o</em>-aminophenol participated in complexation through a single pot reaction. FT-IR spectra showed that the Schiff base ligand coordinated to the metal ion through nitrogen of azomethine group and oxygen of hydroxyl group &amp; peroxo group (O-O). The molar conductance values indicated the non-electrolytic nature of both the complexes. Antibacterial activity of the complexes was tested against four pathogenic bacteria, two Gram-positive<em> Staphylococcus aureus </em>&amp;<em> Bacillus cereus</em> and two Gram-negative <em>Escherichia coli </em>&amp; <em>Shigella dysenteriae </em>with standard<em> Kanamycin</em>-30. The result showed that Cd(II) complex exhibited more potential antibacterial activity than the Zr(IV) complex against all the tested pathogens.</p> Md. Mahasin Ali Md. Nur Amin Bitu Md. Saddam Hossain Md. Faruk Hossen Md. Ali Asraf Md. Akhter Farooque Md. Kudrat-E- Zahan ##submission.copyrightStatement## 2020-07-03 2020-07-03 22 28 10.9734/ajocs/2020/v8i119033