Indian Institute of Technology Bombay

Earliest simultaneous multi-color optical observations of GRB 230328B: from 41 seconds to the host-galaxy identification

Abstract We present a multiwavelength study of the long-duration gamma-ray burst GRB 230328B, combining prompt γ-ray observations with exceptionally early simultaneous optical photometry and extensive X-ray, radio, and host-galaxy follow-up. NUTTELA-TAO began simultaneous g′r′i′...

Strong and Weak Quantitative Estimates in Slow-Fast Diffusions Using Filtering Techniques

Abstract. The behavior of slow-fast diffusions as the separation of scale diverges is a well-studied problem in the literature. In this short paper, we revisit this problem and obtain a new proof of existing strong quantitative convergence estimates (in particular, [Formula: see...

A Descriptor and Tool for Guiding Composition Design toward Developing Single- or Mixed/Hybrid-Phase “Layered” Transition Metal Oxide Cathode Materials for Na-Ion Batteries

Abstract The structure type and phase assemblage of “layered” Na-transition metal (TM) oxides dictate their performance as cathode materials, resulting in an impetus toward developing biphasic or hybrid Na-TM-oxides. However, a fundamental understanding as to what drives the form...

Unitary quantum matter-bounce in a universe with a positive cosmological constant

Abstract We analyze the Wheeler-DeWitt quantization of a spatially flat Friedmann–Lemaïtre–Robertson–Walker universe containing pressureless dust and a positive cosmological constant ( $$\Lambda &gt; 0$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi...

Impact of α-substitution on the photodissociation dynamics of nitromethane: The CH3 and NO release channels

Photolysis of 1-nitropropane, 2-methyl-2-nitropropane, and (nitromethyl)benzene at 213 and 225 nm reveals distinct mechanistic features in CH3 and NO elimination channels. The CH3 fragments exhibit anisotropic, non-statistical translational energy distributions, consistent with b...

AllostericInhibitors of Erythromycin Resistance MethyltransferaseReverse Antibiotic Resistance

Abstract Methylation of a critical adenine residue of the 23S rRNA residing in the nascent exit tunnel of the bacterial ribosome, by Erythromycin resistant methyltransferases (Erms), reduces binding of macrolide, lincosamide, and streptogramin B (MLSB) class of antibiotics and co...

Brick kilns across India: A temporal analysis of brick kiln distribution and technology types

Thousands of brick kilns operate across India, significantly contributing to air pollution and CO 2 emissions due to outdated practices and non-compliance with environmental standards. Regulations promoting cleaner kiln technologies have been introduced, yet detailed information...

Ethylene‐Mediated Template‐Free, Enyne Metathesis Gives Macrolactone 1,3‐Dienes: Synthesis of Polvolide and Muscolide From Renewable Feedstocks

A template‐free, stereodefined strategy for the synthesis of macrocyclic 1,3‐diene lactones from renewable feedstocks derived from castor and oleic oils is reported. An endo ‐selective ring‐closing ethylene‐mediated enyne metathesis (RCEYM) proceeds with complete E ‐selectivity a...

A Discrete Dislocation Dynamics Study of Prior Particle Boundary Effects in Ni-based Superalloys

Abstract Ni-based superalloys produced via powder metallurgy (PM) undergo hot isostatic pressing (HIP) and subsequent forming operations, during which prior particle boundaries (PPBs) are formed and only partially eliminated. The residual PPB clusters strongly influence the mecha...