Holkar Science College, officially Government Model Autonomous Holkar Science College, also known as Holkar College is an institute in Indore, Madhya Pradesh.It was established on 10 June 1891 by His Highness Maharajadhiraja Raj Rajeshwar Sawai Shri Sir Shivaji Rao Holkar Bahadur XII, the erstwhile ruler of Indore belonging to the Holkar dynasty of the Marathas. The biggest government science institute in the state, has been ranked third among government autonomous colleges in the country by Education World Rankings 2020-21.In the year 1985, the Government Holkar Science College, Indore was awarded the title of a Model College by the state Government of Madhya Pradesh and in the year 1988 the college earned the status of an autonomous college.
Cadmium complex coordinated with Schiff base ligand has a wide biological potential. The present work focuses on the Synthesis of Cadmium complex with Schiff base ligand in the ratio of 2:1 (ligand:metal), where the ligand was derived from 2-amino-3-methylbutanoic acid. The cadmium complex was examined by Cd K-edge XAFS spectroscopy using synchrotron radiation source at RRCAT, Indore, India. The XANES results confirm an octahedral coordination environment around the Cd ion in the +2 oxidation state. The experimental data were fitted with a theoretical model generated using FEFF calculations based on standard crystallographic parameters. The synthesized complex was tested for antibacterial activity against Staphylococcus aureus and E. coli using the well diffusion method. The observations provide insight into the antibacterial activity of the cadmium complex and suggest its potential for future applications.
In this article, we present a theoretical study of an inverse free-electron laser (IFEL) accelerator with a tapered undulator. The tapered undulator is modeled as step-wise tapered sections. The model yields analytical expressions for calculating the accelerating gradient, saturation length, and saturation energy of the IFEL accelerator. A numerical method is adopted to supplement and to verify the validity of the analytical solution. The numerical method used is the Runge-Kutta method of fourth order.
In this study, we investigated the structural and dielectric properties of nickel cobaltite (NiCo2O4) synthesized via low temperature sol-gel auto combustion method. From the analysis of the XRD pattern of nickel cobaltite samples, we observed that the synthesized samples were pure and exhibited the Fd3m space group, which corresponds to a face-centered cubic crystalline structure. The average d-spacing calculated using Bragg's law measured 2.37 Å. Furthermore, Debye-Scherrer's formula was used to calculate the average particle size, which was found to be 26.80 nm. The dielectric properties of nickel cobaltite were successfully investigated at room temperature. We observed a higher value of dielectric constant at lower frequency (> 3 Hz). As the frequency increased, the dielectric constant rapidly decreased. The Cole-Cole plot of impedance also confirmed the presence of grain boundaries.
The synthesis process of nanoparticles profoundly influences the chemical and physical properties of materials. Green synthesis, utilizing plant extracts as precursor materials, presents an environmentally friendly approach for producing metal oxide nanoparticles. In this study, we synthesized copper-doped nickel cobaltite (Ni1-xCuxCo2O4, x = 0.5) nanoparticles via a green synthesis method employing aloe vera leaf extract. Analysis of the XRD pattern revealed the formation of cubic spinel Ni0.5Cu0.5Co2O4 nanoparticles well-crystalline in nature (space group: Fd-3 m), free from secondary impurity phases. Crystalline size, determined using Debye Scherrer, modified Scherrer, and Williamson-Hall models, yielded values of ∼ 27 nm, ∼ 35 nm, and ∼ 62 nm, respectively. Dielectric studies conducted at room temperature revealed a frequency-dependent increase in dielectric constant. At lower frequencies, tangent loss (tan δ) showed higher values, which gradually decreased as frequency increased. Additionally, the AC conductivity demonstrated a significant increase with higher external field frequencies.
In this study, to explore a potential sensor for the valproic acid drug, pure and doped zinc oxide nanoclusters (Zn12O12, AlZn11O12, and, GaZn11O12) were utilized in the gas and solvent phase using the density functional theory calculations. The adsorption energies were calculated at -21.87, -39.64, and -24.73 kcal mol-1 for Zn12O12, AlZn11O12, and, GaZn11O12 complexes in their most stable configuration, respectively. Thermodynamic investigations were shown the interaction of valproic acid with the nanoclusters is spontaneous and exothermic. Sensor response investigation indicated 10.17, 6113.83, and 3.22 after the adsorption process for the Zn12O12, AlZn11O12, and, GaZn11O12, respectively. Thus, it is clear that the AlZn11O12 nanocluster demonstrated a significant sensor response. Further, the AlZn11O12 nanocluster had a practical short recovery time of 11.18 s. The solvent phase calculations indicated that these structures were stable in water. UV-vis calculation showed after the interaction of valproic acid with the AlZn11O12 spectrum shifted significantly to the higher wavelength region (red shift). Consequently, this study proposes the AlZn11O12 nanocluster as a potential candidate for valproic acid detection based on its suitable outcomes.
