Dust in Supernovae and Supernova Remnants I : Formation Scenarios

Supernovae are considered as prime sources of dust in space. Observations of local supernovae over the past couple of decades have detected the presence of dust in supernova ejecta. The reddening of the high redshift quasars also indicate the presence of large masses of dust in early galaxies. Considering the top heavy IMF in the early galaxies, supernovae are assumed to be the major contributor to these large amounts of dust. However, the composition and morphology of dust grains formed in a supernova ejecta is yet to be understood with clarity. Moreover, the dust masses inferred from observations in mid-infrared and submillimeter wavelength regimes differ by two orders of magnitude or more. Therefore, the mechanism responsible for the synthesis of molecules and dust in such environments plays a crucial role in studying the evolution of cosmic dust in galaxies. This review summarises our current knowledge of dust formation in supernova ejecta and tries to quantify the role of supernovae as dust producers in a galaxy.Peer reviewe

Article Commentary: The Management of Pediatric Polytrauma: Review

Polytrauma is a major cause of mortality and morbidity in both developed and developing countries. The primary goal of this review is to provide a comprehensive overview on current knowledge in the management of pediatric polytrauma patients (PPPs). A database review was conducted based on a search in the Embase, Medline OVID-SP, Web of Science, Cochrane central, and Pubmed databases. Only studies with “paediatric population” and “polytrauma” as criteria were included. A total of 3310 citations were retrieved. Of these, 3271 were excluded after screening, based on title and abstract. The full texts of 39 articles were assessed; further selection left 25 articles to be included in this review. The most crucial point in the management of PPPs is preparedness of the staff and an emergency room furnished with age-appropriate drugs and equipment combined with a systemic approach