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.

Study of photospheric, chromospheric and coronal activities of V1147 Tau

Abstract: We present analyses of optical photometric, spectroscopic, polarimetric and X-ray observations of the K5V binary star, V1147 Tau. Nearly 20 yr of optical observations show that V1147 Tau is a periodic variable with a photometric period of 1.4845 ± 0.0001 d. Light curves observed at 16 epochs show changes in minima, amplitude and shape indicating that the variability is due to the presence of surface inhomogeneities. The surface coverage of spots was found to be in the range of 9–22 per cent. Most of the time, the spots were resolved as two active longitudes. Switching of dominant active longitudes was also seen. The optical spectroscopy revealed that Hα is present in emission, indicating a high level of chromospheric activity. The polarimetric observations yield average values of polarization to be 0.40 ± 0.03, 0.22 ± 0.05, 0.17 ± 0.07 and 0.12 ± 0.04 per cent in B, V, R and I bands, respectively, which indicates the possibility of scattering by thin circumstellar material. The X-ray light curve was found to be rotationally modulated and was anticorrelated with optical light curves observed at quasi-simultaneous epochs. The corona of V1147 Tau consists of a two temperature plasma with kT1 = 0.07 keV and kT2 = 0.66 keV. The X-ray luminosity in the 0.2–2.4 keV energy band was found to be 4.4–6.8 × 10 29 erg s −1 . Flaring features were also seen in the X-ray light curve.

Ab initio studies on the reactivity of the CF3OCH2O radical: Thermal decomposition vs. reaction with O2

Abstract: Hydrofluoroethers are being considered as potential candidates for third generation refrigerants. The present investigation involves the ab initio quantum mechanical study of the decomposition mechanism of CF3OCH2O radical formed from a hydrofluoroether, CF3OCH3 (HFE-143a) in the atmosphere. The geometries of the reactant, products and transition states involved in the decomposition pathways are optimized and characterized at the DFT (B3LYP) level of theory using 6-311G(d,p) basis set. Energy calculations have been performed at the G2(MP2) and G2M(CC,MP2) level of theory. Two prominent decomposition channels, C-O bond scission and reaction with atmospheric O2 have been considered for detailed investigation. Studies performed at the G2(MP2) level reveals that the decomposition channel involving C-O bond scission occurs with a barrier height of 23.8 kcal mol−1 whereas the oxidative pathway occurring with O2 proceeds with an energy barrier of 7.2 kcal mol−1. On the other hand the corresponding values at G2M(CC,MP2) are 24.5 and 5.9 kcal mol−1 respectively. Using canonical transition state theory (CTST) rate constants for the two pathways considered are calculated at 298 K and 1 atm pressure and found to be 5.9 × 10−6 s−1 and 2.3 × 10−5 s−1 respectively. The present study concludes that reaction with O2 is the dominant path for the consumption of CF3OCH2O in the atmosphere. Transition states are searched and characterized on the potential energy surfaces involved in both of the reaction channels. The existence of transition state on the corresponding potential energy surface is ascertained by performing intrinsic reaction coordinate (IRC) calculation.

Utilization of vermiwash potential on certain summer vegetable crops

Abstract: The study was carried out to evaluate the impact of vermiwash on the growth, flowering and productivity of okra (Abelmoschus esculantus), lobia (Vigna unguiculata) and radish (Raphnus sativus). Vermiwash was extracted from different vermicompost which was composted from different animal agro and kitchen wastes through earthworm Eisenia foetida. It was observed that treatment of vermiwash shows significantly increased in growth and productivity and decreased flowering period. The maximum significant growth was observed in 30 mg/m 2 concentration of combination of buffalo dung with rice bran 38.0±1.3 cm. in case of okra, 30 mg/m 2 concentration of combination of buffalo dung with gram bran (seed of Cicer arientinum) 215.5±5.2 cm., in lobia crops and 30 mg/m 2 concentration of buffalo dung with gram bran 20.4±1.4 cm. The significant early starting of flowering and increased in productivity was found in all treated groups with respect to control.