Archives-J 

Sulphate-rich acid mine drainage (AMD) generated by some mining industries is a serious issue to water treatment industry operators and the South African government. The aim of carrying this study is to reduce if not completely remove the high concentration of sulphate in the AMD by using reagent grade chemical barium chloride. Precipitation technique was used to synthesize barium sulphate from sulphate-rich acid mine water with the addition of barium chloride solution to form a white precipitate. The precipitate formed was characterized using analytical techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HTREM), Fourier transform infra-red (FTIR) spectroscopy and Brunauer-Emmett-Teller (BET). Synthesized barium sulphate was compared with reagent grade synthesized BaSO4 was characterize with XRD to identify the mineral phase, while SEM and HRTEM revealed similar morphology and the BET surface area for both synthesized and reagent grade barium sulphate crystals were determined to be 7.7 m2/g and 68 m2/g. The results from this study shows that sulphate in the acid mine water can be used to synthesize barium sulphate.

Chlamydia trachomatis is an obligate intracellular bacterium associated with sexually transmitted genital tract infection in humans and cause genital infection in both men and women. It is one among the major causes for complications in pregnancy. In this study prevalence of the C trachomatis genital infection among the pregnant women of reproductive age group has been studied. A total of 300 pregnant women with symptomatic genital infections were included in this study. Blood samples were collected from them and screened for Chlamydia trachomatis specific IgM antibodies by Micro Immuno Fluorescence (MIF). The results showed an overall 16% prevalence of C trachomatis infection among the various age groups of the pregnant women . From this informations, we conclude that the C.trachomatis infection is quite prevalent among the pregnant women belongs to our area - south India. Hence, we suggest the need of implementing the screening programme as mandatory for the detection of Chlamydial genital infection among pregnant women, in view of preventing the adverse effects related to pregnancy outcomes.

In this article computational study by using DFT on Exalite – 392A is reported. The quantum mechanical analysis of various energies of molecule in ground state was calculated by using DFT technique. The effect of the solvent on optimized geometry, Mulliken charge distribution in ground and excited state were analysed. With the help of computed highest occupied molecular orbital (HOMO) - lowest unoccupied molecular orbital (LUMO) gap of Exalite – 392A in different medium, we can analysed solvation energy, ionization potential, electron affinity, chemical hardness, electron chemical potential, electronegativity and global electrophilic. UV-Vis spectrum was obtained by using TDDFT technique. The total electron density (TED), potential distribution over molecule by electrostatic potential (ESP) positions of molecule were obtained from molecular electrostatic potential (MEP) and frontier molecular orbitals (FMO) simulated. Main objective is to determine their electronic, thermodynamic and spectroscopic parameters on the basis of the DFT quantum chemical studies and also we are studying the effect of solvent and solute-solvent interactions. This molecule is helpful in designing of lasers.

Ureterosigmoidostomy has been widely used as a surgical urinary diversion technique. However, it can be the cause of many infectious, metabolic, or tumoral complications. We report a case of a patient who developed a rectosigmoid carcinoma at the site of a previous ureterosigmoidostomy after a long latent period.

Blends of cassava flour and partially defatted soybean meal were processed in a single-screw extruder. Experimental design with feed moisture (16, 20, 24 g water/100g flour), amount of soybean (10–30 g soybean/100g flour) and barrel temperature (120, 145, 170 oC) as independent variables leading to 17 combinations that were studied using Box-Behnken Design of response surface methodology to investigate the effect of these input variables on extruder system parameters, namely: product temperature, residence time, machine throughput and specific mechanical energy. The recorded values for all responses varied from 121 to 175 oC, 42.34 to 65.11 seconds, 3.65 to 4.56 kg/hr and 159.01 to 213.63kJ/kg, respectively. Second-order polynomials were used to model the extruder responses as a function of process variables. All three variables affected responses significantly especially their linear terms (p<0.05) and all the fitted models were significant (p<0.05) and correlated well with experimental data (R2 ? 0.934).

This paper presents the concept of Responsive Web Design and Development for Web Applications meant to be present on screens of different resolution like desktop, tablets and mobile phones. It brings into light some of the features of Web Application and Native Applications and how the difference between them is narrowing down. A brief look into the traditional form of web designing is also mentioned in order to understand its drawbacks. It also focuses on the concepts of Media Queries and Twitter Bootstrap, a new front end framework. It overall brings into limelight the new perspective of Web Development so as to make it more flexible and efficient.

A novel method for analytical detection of H2O2 based on ruthenium nanoparticles (RuNPs) functionalized chemically reduced graphene (CRGR) nanocomposite is developed. The RuNPs/CRGR nanocomposite was characterized employing different techniques, such as transmitted electron microscope (TEM), cyclic voltammetry (CV) and chronoamperometry (CA). The RuNPs/CRGR nanocomposite sensor exhibits higher catalytic effect to H2O2 by greatly enhancing the reduction peak current and completely eliminating the interference of other species as compared with a bare electrode. A fast amperometric response was observed by the RuNPs/CRGR electrode with a linear range from 10 to 170 µM and lower detection limit of 0.16±0.01 µM as compared to some other reports. The high reproducibility, specificity as well as long time stability obtained with the proposed sensor indicated that the present method is an effective for H2O2 determination.

The world of education is always changing, in line with the times and the demands of the country's needs . Therefore, the education system needs someone thought leaders in achieving the dream and vision. In educational institutions, the role of the principal is very important in any leadership style can influence and improve the level of change and reform in schools. Effective leaders are leaders who have specific characteristics such as intelligence, honesty and integrity, leadership motivation, self-confidence and creativity. A principal who play an active role as a leader should use the latest approaches to advance the institution he led. One approach that can be used is the charismatic leadership or charismatic leader. Library-based research paper, data was collected using textbooks, journal articles and internet search. In addition, the information valid and reliable used to fulfill the purpose of this paper. This paper was written to study the transformation of the School Management Approach against Charismatic Leadership Styles. It will also touch on the findings obtained from several researchers on topics related to this paper. Charismatic leadership approaches should be emphasized in school management

This paper discusses Second Life, an interactive platform where college students can take advantage of learning opportunities. My interest in distance education presents Second Life as a very useful platform that could promote education at the university level. Through a very modern internet interactive platform, it has the potential of becoming a very useful avenue where virtually all subjects can be addressed. As an educator, I have found the use of Second Life more positive than negative. Second Life helps the students to explore the world around them using the virtual world, by combining the use of games and other interactive instruments. Virtual worlds are not limited to games, but, depending on the degree of immediacy presented, can encompass computer conferencing and text-based chat rooms. Literature shows that there is an ever-increasing growth of people accessing Second Life for educational advantages.

This paper evaluates the benefits of operating an electric distribution network in a security-constrained optimal power flow (SCOPF) in order to mitigate against possible blackout in an N-1 contingency. A 16-bus UKGDS network was used for the analysis. An SCOPF was performed on the network by introducing N-1 line contingency to the network and this resulted to constraints violations. The infeasibility in the solution occurred due to the radial nature of the network. The operation of SCOPF is realized in a mesh network system, which was done by connecting branches between bus 5-7 and bus 12-16 to the network. The system was simulated to operate in SCOPF and N-1 line contingency was inserted to the network to test for constraint violation/ feasibility of the system. This resulted in feasible solution in all the line contingencies with no constraint violation.