Japfü Christian College

Ex-situ doping of the semiconductor bismuth oxy bromide (BiOBr) by the green synthesized Ag nanoparticles is detailed in this work. BiOBr and Ag-doped BiOBr nanoparticles are synthesized using the co-precipitation technique. Ocimum tenuiflorum leaf extract is used as the reagent for reducing silver nitrate to silver nanoparticles for the preparation of Ag-doped BiOBr. The incorporation of Ag into the BiOBr lattice is confirmed by the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies. Mesoporous nature of the BiOBr and Ag-doped BiOBr nanoparticles was identified using Brunauer–Emmett–Teller (BET) analysis. The pore radius and surface area were found to increase as a result of Ag doping in BiOBr. The Ag-doped BiOBr nanoparticles delivers an excellent 100

This study examines the solar flares of 2012 and their effects on geomagnetic disturbances at the high-latitude station Resolute Bay (RES). Employing the Vertical Variance (VV) method, the analysis highlights that geomagnetic field perturbations following solar flares are strongly influenced by sharp variations in the X-component of the solar wind speed, along with the solar flare X-ray flux and the Interplanetary Magnetic Field (IMF).The characteristic nonlinearity of the solar wind-magnetosphere system makes it difficult to estimate the relative influence of the various interplanetary parameters that impact the geomagnetic activity. This work addresses this challenge by employing line-fit correlation coefficients to assess and compare the effects of the solar wind speed and solar flare flux. The findings demonstrate that fluctuations in the X-component of solar wind speed exert a greater influence on geomagnetic disturbances than variations in solar flare flux. Additionally, the role of the Z-component of the IMF in modulating geomagnetic activity is substantiated. Abrupt changes in the SW speed occurring when the IMF is southward are found to produce strong disturbances in the geomagnetic field. The study provides new insights into the dynamics of solar wind-magnetosphere coupling and advances our understanding of geomagnetic disturbances driven by solar activity.

pH sensitive tautomerism of the hydrazone, 5-(2-(2-hydroxyphenyl)hydrazono)-2,2-dimethyl-4,6-dione, derived from Meldrum's acid and 2-hydroxyphenol is studied by comparing the electronic spectra under different pH conditions. The azo-enol tautomerism of the compound on coordination is further established by the synthesis and characterisation of Copper(II) complex. The characterisation methods include microanalytical, FTIR, UV-Vis spectroscopy, molar conductance and magnetic susceptibility measurements, ESR and single crystal XRD methods. The microanalytical methods prove the metal-ligand stoichiometry in the complex to be 1:1 and the molar weight 343.8. The comparison of the FTIR spectrum of the complex with that of the ligand proves the ligand undergoes enolisation prior to complexation. Further, the complex shows characteristic Cu-N and Cu-O vibrations in the FTIR spectrum at 580 cm-1 and 512 cm-1 respectively. In addition to the intraligand transitions, the electronic spectrum shows three d-d transitions in the visible region corresponding to 2B1g <- 2B2g (dx2-y2 <- dxy), 2B1g <- 2Eg (dx2-y2 <- dyz, dxz) and 2B1g <- 2A1g (dx2-y2 <- dz2) which is consistent with the square planar environment of the metal ion in the complex. The X-band ESR spectrum of the complex at LNT exhibits the characteristic four-line hyperfine splitting pattern with g|| = 2.25, g perpendicular to = 2.06 and gav = 2.12 suggesting square planar configuration around the metal center. The crystals of the complex belong to the monoclinic P21/n space group with unit cell parameters a = 6.4568 (4) angstrom, b = 26.4916 (15) angstrom, c = 7.7584 (4) angstrom, alpha = 90 degrees, (3 = 102.066 (2)degrees and gamma = 90 degrees. The complex possess a distorted square planar coordination geometry with the tridentate ligand coordinated via phenolate oxygen, enolate oxygen and azo nitrogen. The fourth coordination site is occupied by the oxygen atom of a water molecule. The in vitro antimicrobial studies of the compounds suggest the complex as specifically active against S. aureus bacteria with IC50 4.6 mu g/mL and MIC 10 mu g/mL.

Evidence has demonstrated that uncertainty about compatibility with religious beliefs and limited health knowledge hinder uptake of family planning (FP), even among women who would like to prevent or delay childbearing. Empowering women and men to choose the number and timing of children is a global goal and enhances both maternal and child health. Building on data demonstrating the effectiveness of religious leaders in Tanzania to provide public health information in communities, the aim of this study was to understand whether and how an educational seminar about FP that was provided to Tanzanian Muslim religious leaders could be an effective means by which education about FP could reach members of their communities. This study employed a mixed-methods approach to pilot-test a one-day educational seminar about social, medical, and theological aspects of FP. The seminar was provided to Muslim religious leaders from two mosques in northwest Tanzania in April 2022. Six weeks after the seminar, the same religious leaders were invited to evaluate the seminar both by a quantitative survey assessing acceptability, appropriateness, and feasibility, and in in-depth interviews. Interviews explored participants' knowledge and perceptions of FP, views of its permissibility in Islam, and actions that they had taken since attending the seminar. Demographic and survey data was analyzed using R software. Thematic analysis using de-identified transcripts was performed using NVivo (Version 12). In June 2022, 48 Muslim religious leaders (26 women; 22 men) completed the quantitative survey and in-depth interviews. Participants rated the seminar as highly acceptable, appropriate, and feasible, with mean scores above 4.5 out of 5 for every statement. Participants viewed the seminar as enlightening and expressed that it improved their knowledge about FP and enabled them to consider FP from both medical and Islamic faith-based viewpoints. Others described having taught their communities about FP and described the positive impact the seminar had for enhancing couple communication and enabling FP uptake for those desiring to use it. Almost all participants recommended that the seminars return to their community more frequently and indicated the importance of allowing discussion time for men and women separately during part of the seminar. Muslim religious leaders reported feeling equipped by an educational seminar to teach about FP to their communities. These data highlight the high potential of trusted religious leaders to build knowledge about FP, which could address women's current unsatisfied demand for FP and promote maternal and child health in Muslim communities in Tanzania.

The present study investigates the cause of oscillation in the critical frequency (foF2) and peak height (hmF2) of the F2 layer during evening hours in the low solar activity year 2020 using 5-min resolution ionogram data from the midlatitude stations Nicosia (35.025°N, 33.157°E) and Athens (38.0°N, 23.5°E). Analysis of geomagnetically quiet days reveals that the normalized fluctuations in foF2 and hmF2 exhibit oscillations with periodicities ranging from 120 to 240 min, which are associated with large-scale atmospheric gravity waves (AGWs)/traveling ionospheric disturbances. Observations reveal two distinct types of wave-induced oscillations in foF2 and hmF2: one that begins in the afternoon, intensifies after sunset, and fades before midnight; and another that initiates shortly after sunset and similarly weakens before midnight. Analysis of the events indicates westward-propagating acoustic-gravity waves (AGWs), with estimated propagation velocities ranging from 439 to 615 m/s for afternoon AGWs and 256 to 341 m/s for solar terminator AGWs.