Deen Dayal Upadhyay Gorakhpur University

About: Deen Dayal Upadhyay Gorakhpur University is a education organization based out in Gorakhpur, Uttar Pradesh, India. It is known for research contribution in the topics: Thermal decomposition & Lymnaea acuminata. The organization has 1032 authors who have published 1591 publications receiving 21734 citations. The organization is also known as: Gorakhpur University.

Exact solution of one-dimensional relativistic jet with relativistic equation of state

Abstract: We study the evolution of one-dimensional relativistic jets, using the exact solution of the Riemann problem for relativistic flows For this purpose, we solve equations for the ideal special relativistic fluid composed of dissimilar particles in flat space-time and the thermodynamics of fluid is governed by a relativistic equation of state We obtain the exact solution of jets impinging on denser ambient media The time variation of the cross-section of the jet-head is modeled and incorporated We present the initial condition that gives rise to a reverse shock If the jet-head cross-section increases in time, the jet propagation speed slows down significantly and the reverse-shock may recede opposite to the propagation direction of the jet We show that the composition of jet and ambient medium can affect the jet solution significantly For instance, the propagation speed depends on the composition and is maximum for a pair-dominated jet, rather than a pure electron-positron or electron-proton jet The propagation direction of the reverse-shock may also strongly depend on the composition of the jet

Diversity of Passalora on Ficus.

Abstract: During a survey of hyphomycetes, Passalora trichophila sp. nov. was discovered on living leaves of Ficus mysorensis (Moraceae) in a subtropical forest of eastern Uttar Pradesh, India. This species is described, illustrated and compared with morphologically similar species. A key to species of Passalora found on Ficus is provided. Descriptions and nomenclatural details were deposited in MycoBank (www.MycoBank.org).

Computational studies on nitramino derivatives of 1-amino-1,2-azaboriridine as high energetic material

Abstract: In this study, we have applied computational methods to determine the thermodynamic and explosive characteristics of nitramino derivatives of 1-amino-1,2-azaboriridine. Mono-, di- and tri-nitramino derivatives have been designed and considered for detailed study. Structure optimization and frequency calculation of the species have been performed at DFT-B3LYP/6-311++G(d,p) level of theory. The atomization method is employed to calculate the heat of formation (HOF), using electronic energy data calculated at G3 level. Utilizing the WFA program, crystal densities of designed compounds considered during the present study were predicted using the data obtained at B3PW91/6-31G(d,p) level. Results show that the number of nitramino groups influences the heat of formation of the title compounds. The calculated bond dissociation energies suggest that the N–NO2 bond of the nitramino group is the weakest bond and may be treated as a trigger bond involved in the detonation process. The impact sensitivities (h50) of all the compounds were evaluated and it was found that the designed compound 1-amino-2,3,3-trinitramino-1,2-azaboriridine is highly insensitive towards impact. Theoretical estimate of the condensed phase density of nitramino derivatives was found to be in the range of 1.60–1.80 g cm−3. Detonation velocity (D) and the detonation pressure (P) were found to be 8.0–9.0 km s−1 and 26.2–35.2 GPa, respectively. The present investigation reveals that one of the designed compounds 1-amino-2,3,3-trinitramino-1,2-azaboriridine meets the criteria for high energy density materials.