Birla Institute of Technology, Mesra

About: Birla Institute of Technology, Mesra is a education organization based out in Ranchi, India. It is known for research contribution in the topics: Computer science & Dielectric. The organization has 2801 authors who have published 4789 publications receiving 52426 citations. The organization is also known as: BIT.

Microstructure and properties of friction stir butt-welded AE42 magnesium alloy

Abstract: The aim of the present work was to develop a friction stir joint and to investigate the microstructural and mechanical properties of magnesium (AE42 Mg alloy) sheets joined by friction stir welding (FSW). The two sheets, aligned perpendicular to the welding directions, have been successfully welded. Light optical microscopy was used to observe and study the weld zone characteristics. Dynamic recrystallisation was observed in the weld region as well as in the thermo-mechanical heat-affected zone (TMAZ). There was a clear decrease in the precipitate size from the base material through the TMAZ and into the weld zone. The precipitates observed were β-Mg17Al12, Al11Ce3 and Al2Ce. The welds were free of porosities. XRD, SEM and TEM characterization performed on the weld region showed the presence of intermetallic phases. Vickers micro-hardness testing was done along the thickness (transverse direction) of the plate in the weld region to study and understand the variation of hardness with thickness. A good correlation between the precipitate size and micro-hardness was observed.

Transcriptome-wide analysis of WRKY transcription factors in wheat and their leaf rust responsive expression profiling

Abstract: WRKY, a plant-specific transcription factor family, has important roles in pathogen defense, abiotic cues and phytohormone signaling, yet little is known about their roles and molecular mechanism of function in response to rust diseases in wheat. We identified 100 TaWRKY sequences using wheat Expressed Sequence Tag database of which 22 WRKY sequences were novel. Identified proteins were characterized based on their zinc finger motifs and phylogenetic analysis clustered them into six clades consisting of class IIc and class III WRKY proteins. Functional annotation revealed major functions in metabolic and cellular processes in control plants; whereas response to stimuli, signaling and defense in pathogen inoculated plants, their major molecular function being binding to DNA. Tag-based expression analysis of the identified genes revealed differential expression between mock and Puccinia triticina inoculated wheat near isogenic lines. Gene expression was also performed with six rust-related microarray experiments at Gene Expression Omnibus database. TaWRKY10, 15, 17 and 56 were common in both tag-based and microarray-based differential expression analysis and could be representing rust specific WRKY genes. The obtained results will bestow insight into the functional characterization of WRKY transcription factors responsive to leaf rust pathogenesis that can be used as candidate genes in molecular breeding programs to improve biotic stress tolerance in wheat.