Papers by Sk Hanan Rahman
International Journal of Research in Pharmaceutical Sciences, 2020
Physical and chemical approaches to synthesize nanoparticles are not suitable for safer medical u... more Physical and chemical approaches to synthesize nanoparticles are not suitable for safer medical usage. Thus, green method could be a suitable approach to produce safe and non-toxic nanoparticles. In this study, silver nanoparticles were synthesized by Escherichia coli and its biological activities were determined. The produced bacterial biomass (supernatant) was mixed with silver nitrate to produce silver nanoparticles. Escherichia coli acting as reducing agents to produce nanoparticles. The colour changes from colourless to brown was observed to indicate the formation of silver nanoparticles. It was further reconfirmed using UV-Vis Spectroscopy, where the peak at 300 nm confirmed the formation of AgNPs. The antimicrobial and cytotoxicity activity of synthesized nanoparticles was tested. At 1 mg/ml concentration, the nanoparticles were effective against all the micro-organisms tested, Bacillus subtilis (12.7±2.5 mm) Staphylococcus aureus (13.7±2.3 mm), Pseudomonas aeruginosa (14.3±2...
Frontiers in Cellular and Infection Microbiology
Dengue is a major public health concern, affecting almost 400 million people worldwide, with abou... more Dengue is a major public health concern, affecting almost 400 million people worldwide, with about 70% of the global burden of disease in Asia. Despite revised clinical classifications of dengue infections by the World Health Organization, the wide spectrum of the manifestations of dengue illness continues to pose challenges in diagnosis and patient management for clinicians. When the Zika epidemic spread through the American continent and then later to Africa and Asia in 2015, researchers compared the characteristics of the Zika infection to Dengue, considering both these viruses were transmitted primarily through the same vector, the Aedes aegypti female mosquitoes. An important difference to note, however, was that the Zika epidemic diffused in a shorter time span compared to the persisting feature of Dengue infections, which is endemic in many Asian countries. As the pathogenesis of viral illnesses is affected by host immune responses, various immune modulators have been propose...
Conference Presentations by Sk Hanan Rahman
IOP Conf. Series: Earth and Environmental Science, 2024
Environmental pollution by wastewater is a prominent crisis in the modern world, and currently, a... more Environmental pollution by wastewater is a prominent crisis in the modern world, and currently, available treatments consume high amounts of electricity, leading to another global crisis of resources. Present system designs in Malaysia focus mainly on treating municipal effluents. This leaves a wide scope for treating other substrates such as landfill leachate effluents. Landfill leachate is one of the alarming pollutants of water reservoirs due to the presence of high concentrations of contaminants such as chemical oxygen demand, ammonia, phosphate, nitrogen, and harmful heavy metals. This raises an immediate focus to modernize its' treatment system in Malaysia by using sustainable biological treatment with minimal use of energy. Thus, this research targets treating leachate landfill wastewater using an anaerobic digestion process by bacteria that will not only remove the high chemical oxygen demand contents of the wastewater but also utilize them to generate electricity. The two anaerobic electrogenic bacteria, Shewanella oneidensis and Klebsiella pneumoniae were used in this study at 10%, 30%, and 50% concentration, presenting a substantial removal of chemical oxygen demand (COD) from landfill leachate wastewater, in turn, producing a power output of 0.09μA to 0.36μA on a microliter scale, measured using a compact paper-based electro-fluidic array that mimics a microbial fuel cell. However, the bacterial digestion of landfill leachate was found to be inhibited due to the presence of high concentrations of ammoniacal nitrogen and phosphate.
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Papers by Sk Hanan Rahman
Conference Presentations by Sk Hanan Rahman