Publications by authors named "Nirmal Kumar Singh"

Article Synopsis
  • External magnetic-field (EMF) has been identified as a significant process parameter in welding, influencing factors like the weld arc shape, molten metal flow, and weld joint properties.
  • The article reviews previous research on EMF applications in welding and highlights recent advancements in designing EMF setups for controlled arc welding.
  • Despite successful EMF integration in welding, widespread adoption in welding machines remains limited, posing challenges for researchers and manufacturers in recognizing it as a standard parameter for improving weld quality.
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This study attempted to analyze and optimize the effect of an external magnetic field (EMF) on the aspect ratio and heat input for AZ31B weld joints that were welded using the gas metal arc welding (GMAW) process. The response surface methodology (RSM) was adopted for the critical analysis, and subsequently, mathematical models were developed based on the experimental results. It was observed that the EMF and its interaction with the wire feed rate significantly affected the aspect ratio and heat input, respectively.

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RNAi is an evolutionary conserved, highly efficient, and cost effective technique of gene silencing. It holds considerable promise and success has been achieved both in vitro and in vivo experiments. However, it is not devoid of undesirable side effects as dsRNA can trigger the immune response and can also cause non-specific off-target gene silencing.

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For protection against cholera, it is important to develop efficient vaccine capable of inducing anti-toxin as well as anti-colonizing immunity against Vibrio cholerae infections. Earlier, expression of cholera toxin B subunit (CTB) in tomato was reported by us. In the present investigation, toxin co-regulated pilus subunit A (TCPA), earlier reported to be an antigen capable of providing anti-colonization immunity, has been expressed in tomato.

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