A case study of whistlers recorded at Varanasi (L = 1.07)

Abstract

Large number of high dispersion whistlers recorded at low latitude station Varanasi (L = 1.07) are analysed and it is find out that they have propagated along L 2.12-2.76. This is explained by considering the propagation of whistlers through the earth-ionosphere wave guide after exiting from the duct towards the equator. Using diffusive equilibrium model (DE-1), we have estimated equatorial electron density, total electron content in a flux tube and large scale convective electric fields which are in good agreement with the results reported by other workers from the analysis of mid latitude whistlers. The significance of this paper is to probe mid latitude plasmasphere using whistlers recorded at low latitudes. Further, an attempt has been made to study the propagation mechanism of low latitude whistlers.

Design of diastereomeric salt resolutionviamulticomponent system characterization: a case study with hydrate formation

“…It was developed by Pfizer and became a blockbuster for treating epilepsy, generalized anxiety disorder, neuropathic pain, and other pain-related problems. 19,20 Since the expiration of relevant patents, 21,22 PG has been available as a generic medication in most countries, including the United States, as of 2019. As (S)enantiomer of PG exhibits the desired pharmacological activity, 23,24 it is produced and commercialized in enantiomerically pure form.…”

Population Balance Modeling of Diastereomeric Salt Resolution

“…Pregabalin, also known as 3-isobutyl-γ-aminobutyric acid, is a racemate-forming chiral compound with anticonvulsant and anxiolytic effects. , This top-selling drug was developed and commercialized by Pfizer, but since 2019, it has been available worldwide as a generic medication. , Pregabalin has a wide indication range, including the treatment of epilepsy, generalized anxiety disorder, neuropathic pain, and other pain-related problems. The desired pharmacological activity is carried by the ( S )-enantiomer; thus, it is produced in enantiopure form. , Besides enantioselective synthesis using the chiral pool, asymmetric catalysis, − chemoenzymatic reaction, − or chiral auxiliaries, , several chiral resolution methods were developed.…”