International Research Journal of Pure and Applied Chemistry 2021-04-23T05:42:49+00:00 International Research Journal of Pure and Applied Chemistry Open Journal Systems <p style="text-align: justify;"><strong>International Research Journal of Pure and Applied Chemistry (ISSN: 2231-3443)</strong> aims to publish original research articles, review articles and short communications in all aspects&nbsp; of pure and applied chemistry including analytical chemistry, biochemistry, medicinal chemistry, molecular biology and genetics, inorganic chemistry, organometallic chemistry, materials chemistry, chemistry of solids, liquids, polymers and interfaces between different phases, neurochemistry, nuclear chemistry, modern transmutation, organic chemistry, physical chemistry, phytochemistry, polymer chemistry, supramolecular and macromolecular chemistry, chemical thermodynamics, chemical kinetics, electrochemistry, statistical mechanics, spectroscopy, astrochemistry and cosmochemistry, quantum chemistry and theoretical chemistry, sonochemistry, agrochemistry, atmospheric chemistry, chemical engineering, chemical biology, chemo-informatics, electrochemistry, femtochemistry, geochemistry, green chemistry, histochemistry, immunochemistry, marine chemistry,&nbsp; mechanochemistry, nanotechnology, natural product chemistry, oenology, petrochemistry, pharmacology, photochemistry, radiochemistry, synthetic chemistry, kinetics and mechanisms of chemical reactions, thermochemistry, chemistry in industry and interactions between chemistry and environment.&nbsp;This is a quality controlled, peer-reviewed, open access INTERNATIONAL journal.</p> Distribution and Carcinogenicity of PCBs in Soil Contaminated with Transformer Oil in Selected Locations in Jos, Plateau State Nigeria 2021-04-21T18:12:02+00:00 E. G. Ibrahim S. J. Salami J. S. Gushit M. A. Gube-Ibrahim <p>Soil from the vicinity of transformers installation in different locations in Jos, Plateau State was investigated for Polychlorinated Biphenyls (PCBs). The assessment was carried out for both total PCBs and congeners using Agilent 6975 GC-MS in ten different locations. The soil samples were extracted with 1:1 hexane- acetone in an ultrasonic bath, concentrated and cleaned with column chromatography using silica gel and hexane as eluting solvent. The result shows five locations were polluted with PCBs that exceed the maximum limit of 2.0mg/kg as permitted by the United States Toxic Substance Control Act (TSCA) with the following values NGS 1 (14.25), NGS 3 (4.47), NGS 6 (9.48), NGS 9 (8.21) and NGS 10 (5.05) while the others have NGS 2 (0.64), NGS 4 (1.85), NGS 5 (0.83), NGS 7 (0.95) in mg/kg respectively, NGS 8 value was below the instrument detection limit (0.0012mg/kg). The order for the total PCBs concentration in these selected locations are NGS 1 &gt; NGS 6 &gt; NGS 9 &gt; NGS 10 &gt; NGS 3 &gt; NGS 4 &gt; NGS 7 &gt; NGS 5 &gt; NGS 2. The carcinogenicity of the dioxin-like PCBs calculated as total toxicity equivalence concentration (TTEC) in these selected locations corresponds to NGS 1 (0.00001), NGS 2 (0.0000051), NGS 3 (0.0000054), NGS 4 (0.0000051), NGS 6 (0.0000063), NGS 7 (0.0000078), NGS 9 (0.0000051) and NGS 10 (0.0000051) respectively. The total cancer risk computed by addition of cancer risk due to ingestion, inhalation and dermal contact revealed that all the locations have very low to low cancer risk compared with the value recommended by the United State.</p> 2021-04-15T00:00:00+00:00 ##submission.copyrightStatement## Potential Screening of Indigenous Drought Stress Tolerant Bacteria for Plant Growth Promotion (PGP) Traits: An In-vitro Study 2021-04-23T05:42:49+00:00 B. Prasanna Kumar N. Trimurtulu A. Vijaya Gopal <p><strong>Aims: </strong>The study aims to formulate relevant microbial consortia against drought stress mitigation with potential drought stress tolerant bacterial isolates by polyethylene glycol 6000 (PEG 6000) different moisture stress levels to mitigate the drought stress which can finally helpful to increase plant and soil health under adverse stress conditions.</p> <p><strong>Study Design:</strong>&nbsp; Source of rhizosphere soil samples from groundnut drought prone areas of Andhra Pradesh.</p> <p><strong>Place and Duration of Study:</strong> Department of Agricultural Microbiology, Advanced Post Graduate Centre, Acharya N.G Ranga Agricultural University, Lam, Guntur, 522 034, between June 2017 and July 2020.</p> <p><strong>Methodology:</strong> Isolated strains were also tested for further drought stress screening by polyethylene glycol 6000 <em>In-vitro</em> screening was done for different plant growth promotion activities i.e. phosphate solubilization, IAA production, ammonia production, ACC deaminase activity, HCN production and catalase. HCN production, catalase positive, colony morphology, Gram staining and biochemical tests.</p> <p><strong>Results:</strong> Fifty-one efficient bacterial isolates were obtained from drought prone rhizosphere soils of groundnut. Isolated strains were also tested for further drought stress screening by polyethylene glycol 6000 at 0% (-0.05 MPa), 10% (-0.65 MPa), 20% (-1.57 MPa), 30% (-2.17 MPa) and 40% (-2.70 MPa). Thirty-seven bacterial isolates were further found to have an enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity which improved plant growth during stress conditions. The <em>In-vitro</em> screening was done for different plant growth promotion activities, twelve bacterial isolates were positive for phosphate solubilization. IAA production was shown by almost all the bacterial isolates. Three isolates were positive for ammonia production. Two isolates were positive for HCN production and all the isolates were found to be catalase positive. Seven isolates were showing maximum plant growth promotion activities and further identified based on colony morphology, Gram staining and biochemical tests.</p> <p><strong>Conclusion:</strong> This study suggests that 51 bacterial isolates exhibited the highest tolerance to moisture stress under <em>In-vitro</em>, these are screened and considered as potential isolates against plant growth promoting characteristics. Plant growth promoting bacteria that can modulate physiological response for water shortage, enhanced water or nutrient uptake and transpiration, induction of plant growth hormone signaling and increased antioxidase activity and photosynthetic rate thereby ensuring plant survival under such stressful conditions. In regard to isolates having PGP properties from the research work presented could be studied further under <em>In-vitro</em> and in vivo conditions from different soils with several crops for confirming their use as bio inoculants.</p> 2021-04-23T00:00:00+00:00 ##submission.copyrightStatement##