Asian Journal of Environment & Ecology <p style="text-align: justify;"><strong>Asian Journal of Environment &amp; Ecology (ISSN: 2456-690X)</strong> aims to publish high quality papers (<a href="/index.php/AJEE/general-guideline-for-authors">Click here for Types of paper</a>) in all areas of ‘Environment and Ecology’. This journal facilitates the research and aims to publish papers as long as they are technically correct, scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer reviewed, open access INTERNATIONAL journal.</p> SCIENCEDOMAIN international en-US Asian Journal of Environment & Ecology 2456-690X Assessment of Water Quality of Surma River and Its Impacts on Urban Residents: The Case of Sylhet City Corporation <p>This study intends to assess the current water quality of the Surma River alongside Sylhet City and its impacts on urban residents. The water quality has been assessed by laboratory analysis considering a total of seven water quality parameters, viz. pH, DO, BOD, COD, TS, TSS and TDS and water samples were collected from four stations. The impacts of water quality on human health, fishing, the soil, agriculture and the surrounding environment are analyzed based on primary data collected through questionnaire survey covering a total of 200 respondents who resides at the bank of the river. The average values of parameters are DO 11.15 mg/l, BOD 1.77 mg/l, COD 25.27 mg/l, pH 7.2, TSS 131.5 mg/l, TDS 26.47 mg/l and TS 158 mg/l. Among of them only pH is within standard value. Respondent of the study area opined that they have no waste dumping station where they can put their waste. For that reason they compelled to dump waste into the river.Inadequate waste management system and lack of proper waste management initiatives accelerating the pollution exponentially. The scenario can be improved by implementing the recommendations made by the study, which can have the positive changes in the human and aquatic life, environment and ecosystem of the river area.</p> Afruja Begum Md. Muyeed Hasan ##submission.copyrightStatement## 2019-09-09 2019-09-09 1 9 10.9734/ajee/2019/v10i230109 Neural Oxidant-stress by Azadirachtin Induces Anti-oxidative Enzymes Evincing Biomarker Potential in Paddy Pest, Spathosternum prasiniferum prasiniferum (Orthoptera:Acridoidea) <p>Azadirachtin (C<sub>35</sub>H<sub>44</sub>O<sub>16</sub>/AZT) develops antifeedancy/growth-regulation/fecundity-suppression/ sterilization/oviposition/repellence and deformity in insect via biochemical/cellular changes and causes their death. Agricultural productivity/quality/eco-sustainability is concerned to this issue. ROS are cytotoxic-factors generated in invertebrates in stress-conditions. The present in-vivo/in-vitro study aimed to investigate the impact of dose dependant AZT toxicity on oxidative-stress-marker (alkaline-phosphatise/ALP; thiobarbituric-acid-reactive-substances/TBARS; non-protein-soluble-thiols/NPSH; acetyl-cholinesterase/AChE) and antioxidant-enzyme activity (superoxide-dismutase/SOD; catalase/CAT; glutathione-peroxidise/GPx; amylase) in brain/hemolymph of <em>Spathosternum prasiniferum prasiniferum</em> (Walker,1871) (Orthoptera:Acridoidea). Acridids are highly abundant and bio-indicator of grassland-ecosystem. During cultivation, insects are exposed (dose/time dependant) to AZT. AZT developed restlessness, jerky-movements and swarming-movements in the insects. It promoted oxidative-stress-marker in brain/hemolymphin both sexes but female had significantly stimulated antioxidant-enzymes to overcome cellular-stress. Increase of brain TBARS, antioxidant-enzymes and decrease in NPSH by AZT indicates oxidative-stress induction in this species. In several instances damage to the brain DNA was noticed. In general female insect responded more intensely with some prominent adaptive strategies.</p> Balaram Manna Smarajit Maiti Amlan Das ##submission.copyrightStatement## 2019-09-09 2019-09-09 1 10 10.9734/ajee/2019/v10i230111