Nepal Journal of Environmental Science https://nepjol.info/index.php/njes <p>The Nepal Journal of Environmental Science is published by the <a title="Central Department of Environmental Science" href="http://www.cdes.edu.np/">Central Department of Environmental Science</a>, Tribhuvan University, Kirtipur, Nepal.</p> <p>The submission of the manuscript can be made at <strong>editor@cdes.edu.np</strong> or <strong>cmsharma@cdes.edu.np</strong>.</p> Central Department of Environmental Science, Tribhuvan University en-US Nepal Journal of Environmental Science 2350-8647 Primary studies on biotransformation of steroidal drug Prednisolone https://nepjol.info/index.php/njes/article/view/40538 <p>The less biodegradable steroidal drug, Prednisolone is one of the widely used drugs in the treatment of autoimmune and infectious diseases. Transformation of prednisolone can be achieved with microbial activity. Isolation of prednisolone-resistant microorganisms was done using a sewage sample. Out of 5 isolates, one isolate was selected for further studies based on maximum tolerability to prednisolone. The isolate was identified based on MALDI-TOF. The strain was found to have a match score of 2.336 with gram-negative bacteria <em>Klebsiella </em><em>pneumoniae</em> spp <em>pneumoniae </em>DSM3010 4T HAM. The isolate was found to degrade 80% prednisolone on the 5<sup>th</sup> day of fermentation. The concentration of prednisolone was determined using a colorimetric-based method and HPLC technique.</p> Meghmala Sheshrao Waghmode Vrishali Rajendra Bankar Ankita Subhash Gaikwad Priti Vitthal Gaikwad Neha Nitin Patil Copyright (c) 2022 Central Department of Environmental Science, Tribhuvan University http://creativecommons.org/licenses/by-nc/4.0 2022-07-12 2022-07-12 10 1 1 6 10.3126/njes.v10i1.40538 Record of Burmese Ferret Badger (Melogale personata, I. Geoffroy Saint-Hilaire, 1831) in Kathmandu, Nepal https://nepjol.info/index.php/njes/article/view/43767 <p>Burmese Ferret Badger (<em>Melogale personata)</em> was recorded by camera trapping for the first time in Nepal's Nagarjun forest of Shivapui Nagarjun National Park. According to IUCN, it was expected to inhabit only the eastern part of Nepal but recently the species has been recorded from central and western parts of the country. A globally rarely studied species was only observed during daylight in Nepal but this time it is photographed during the night. A Burmese Ferret Badger was captured for one event with three photographs with PCRI 0.085 in the dense mixed forest of<em> Schima wallichii</em><em>, </em><em>Castanopsis indica.</em> A more comprehensive study on its ecology is necessary to implement suitable conservation measures.</p> Narayan Prasad Koju Laxman Prasad Poudyal Saroj Mani Paudel Karan Bahadur Shah Copyright (c) 2022 Central Department of Environmental Science, Tribhuvan University http://creativecommons.org/licenses/by-nc/4.0 2022-07-12 2022-07-12 10 1 7 10 10.3126/njes.v10i1.43767 Impact of temperature and soil moisture on paddy weed and productivity: A case of Lalitpur District, Nepal https://nepjol.info/index.php/njes/article/view/36659 <p>Rice (<em>Oryza sativa L.)</em> is a major food crop for around 60% of the global population. The production of rice has been challenged by various biotic and abiotic factors. Temperature and soil moisture are the major abiotic and weeds are the major biotic factors for yield loss. The present experiment was conducted to investigate the impact of temperature and soil moisture on rice weed and rice productivity. The experiment was carried out under different temperatures (ambient, ambient +2°C, and ambient +3°C) and soil moisture (ambient, 25-30%, and 10-15%) conditions for the entire crop growth period from June to October 2014. Rice weeds were recorded after 28, 47 and 93 days of rice transplantation for varied soil moisture. Similarly, at varied temperature weeds were recorded after 19, 44 and 66 days of rice transplantation. The results showed that weed density increases under elevated temperature at 2°C and 3°C than under an ambient condition (existing in the surrounding area). An experiment on soil moisture stress indicates a reduction in rice productivity as the density of weed increases with the deficiency of soil moisture. Further studies on temperature and soil moisture resisting rice variety are essential. This study suggests that research on the control of weed species, targeting those weeds benefited at elevated temperature and soil moisture stress conditions, is necessary.</p> Ambika Ghimire Binod Baniya Yubak Dhoj GC Anup KC Copyright (c) 2021 Central Department of Environmental Science, Tribhuvan University http://creativecommons.org/licenses/by-nc/4.0 2022-06-29 2022-06-29 10 1 11 22 10.3126/njes.v10i1.36659