Sir Padampat Singhania University

About: Sir Padampat Singhania University is a education organization based out in Udaipur, India. It is known for research contribution in the topics: Diesel fuel & Encryption. The organization has 124 authors who have published 228 publications receiving 2066 citations. The organization is also known as: SPSU.

Isolation and characterization of endophytic fungi from calotropis procera for their antioxidant activity

Abstract: Objective: To investigate the antioxidant activity of methanolic extract of endophytic fungi isolated from Calotropis procera plant. Methods: The endophytic fungi were isolated from explants of leaf, stem, and flower of C. procera on potato dextrose broth (PDB) medium. The fungal isolates were mass cultured in PDB. The methanolic extracts of these fungi were prepared and evaluated for the antioxidant activity by 1,1-diphenyl- 2-picryl-hydrazyl (DPPH) free radical scavenging assay and reducing power assay. The extracts were characterized for the presence of phenolics and flavonoids. Results: A total of 8 endophytic fungi were isolated from C. procera explants. Out of these 8 fungal isolates, the crude extracts of two fungi, i.e. CPIMR-2 and CPIL-1 showed positive antioxidant activity. From the morphological characteristics, the isolates CPIMR-2 and CPIL-1 were identified as Penicillium spp. and Aspergillus spp., respectively. Both the isolates were found to possess antioxidant potential with % inhibition value of 81.16% and 80.97% in the DPPH radical scavenging assay. The phytochemical screening of the methanolic extracts showed the presence of phenolics and flavonoids. The total flavonoids content in Penicillium species and Aspergillus species were found to be 130.50 μg/mg and 94.91 μg/mg of extracts, respectively. The total phenolic content was found to be 9.16 μg/mg and 12.13 μg/mg of extracts in Penicillium species and Aspergillus species, respectively. Conclusions: Endophtyic fungi were found to be present in medicinal value plant C. procera. The probable bioactive component for antioxidant activity possessed by the fungi would be the flavonoids and phenolics. These metabolite produced by endophytic fungi from C. procera need to be explored further as potential source of novel natural antioxidant compound. Keywords: Endophytes, Calotropis procera, Antioxidant, Radical scavenging, Reducing power, Flavonoids.

Prospects of inedible plant oil-driven bio-lubricants for tribological characteristics – a review

Abstract: Fossil fuel resource is on the draining stage which leads to an increment in the cost of the petroleum products Nowadays, research is focused on the development of environmental friendly lubricant

Effects of target polarization and postcollision interaction on the electron-impact single ionization of Ne(2p), Ar(3p), and Na(3s) atoms

Abstract: We report the perpendicular plane ionization results of ($e$, 2$e$) triple-differential cross sections for the Ne(2$p$) and Ar(3$p$) atoms at the incident electron energies ranging from 5 to 50 eV above ionization potential for neon atoms and from 2 to 50 eV above ionization potential for the argon atoms. The present investigation has been done in the modified distorted wave Born approximation and it has been observed that postcollision interaction and polarization of target are important in the perpendicular plane ionization of atoms. We also present the results of triple-differential cross section for the doubly symmetric coplanar ionization of Na(3$s$) atoms at the incident electron energy ranging from 6 to 60 eV above ionization potential. Thus we are able to see the effects of target polarization and postcollision interaction in coplanar as well as the perpendicular plane geometrical conditions. The results of our calculations for the Ne(2$p$) and Ar(3$p$) have been compared with the very recent measurements of Nixon et al. [K. L. Nixon, A. J. Murray, and C. Kaiser, J. Phys. B 43, 085202 (2010)] and the results of coplanar ionization of Na(3$s$) have been compared with the experimental data of Murray [A. J. Murray, Phys. Rev. A 72, 062711 (2005)]. It is observed that there are certain discrepancies between theoretical and experimental results which indicate that further theoretical efforts are required to understand the cross section trends of neon, argon, and sodium atoms. The cross section in the perpendicular plane ionization exhibits complex variations as a function of incident energy and target.

Convergence Dynamics of Consumer Innovativeness vis-a-vis Technology Acceptance Propensity: An Empirical Study on Adoption of Mobile Devices

Abstract: In the present competitive scenario, marketing practitioners often attempt to learn about customer innovators — those who are open to new ideas and to be among the first to try new products, services or practices. This study explores the relationship between consumer innovativeness on the mobile technology adoption. The results of the study reveal consumers’ reluctance to adopt innovations vis-a-vis mobile technology is chiefly attributed to higher tendency to comply with the constructs which include user interface clarity, usage friendliness, social influence, support of product and service providers, and learning predispositions. However, social influence has a moderate influence on new mobile technology adoption for the consumers who take decisions independently. The study is deemed significant as it would provide enough insights to the marketers to navigate the forces that lead to buying inertia towards newness.