Archives-September 2013

Green synthesis of Zinc Oxide nanoflowers by plant extract is currently under utilization. This research account on the exploit of aqueous leaf extract of Azadirachta indica in the biosynthesis of bioactive zinc oxide nanoflowers with aqueous solutions of zinc acetate and sodium hydroxide at ambient temperature. The aqueous extract of Azadirachta Indica can be used as a template to control particle size and stabilize ZnO nanoparticles. The ZnO nanoflowers prepared by the green synthesis exhibited a hexagonal wurtzite structure with a crystalline size of 51 nm and particle size of 100 nm. To make the process environmentally viable the reaction was carried out under solvent free conditions. Formation of zinc oxide nanoflowers was confirmed by Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction patterns and scanning electron microscopy (SEM) with Energy dispersive X-ray (EDX) patterns. The results confirmed that aqueous leaf extract of Azadirachta indica is a suitable green template to prepare heterogeneous ZnO nanoflowers. Green methods are be good competent for the chemical procedures, which are environment friendly and convenient.

The aim of this study was firstly to compare between different gelling agents for its drug release characteristics, and viscosity and Secondly, to investigate the effect of presence of PluronicF127 on drug release and viscosity of different gelling agents. Topical gel formulations of Ibuprofen were prepared by using Carbopol 934, Carbopol 940, HPMC, Sepineo, Sodium Carboxymethylcellulose (NaCMC) and Hydroxyethylcellulose (HEC) polymer as a gel-forming material that is biocompatible and biodegradable. The skin permeation enhancer used was Menthol. Permeation studies were carried out in-vitro using Cellophane Membrane. In-vitro diffusion study showed that diffusion studies of formulation F6 and marketed gel was comparable. The in-vitro study also reveals that addition of Pluronic F127 results in increase in viscosity of gel which further sustains the drug release. Results shows that as concentration of gelling agent increases viscosity increases and drug release decreases.

Emotional intelligence is increasingly recognized as a key leadership competency and an essential component of behavioral aspect of managing organizations. Research show that managers’ ability to recognize and control their emotions leads to increase in employees’ contribution to organization, commitment, productivity, and customers’ satisfaction. Thus, This research primarily aims to investigate the relationship between emotional intelligence and transformational and transactional leadership styles. To collect data, a questionnaire was distributed among high school teachers and Vizinger’s and Burk’s measures were used to analyze data. The results did not show a meaningful relationship between emotional intelligence and leadership styles.

Although Grevy’s zebra (Equus grevyi) is listed as endangered species and is an important attraction in Kenya’s tourism industry, there have been no attempts to model the implications of climate change on their niche. This study modeled the potential current and future (the year 2080) distribution in Kenya. The E. grevyi location data were sourced from published literature and climate data was downloaded from world climate database website and analysis done using MaxEnt and DIVA-GIS. The model generated an excellent AUC of 0.984 and the future niche is shown to expand. The main five variables contributing more than 2% of change in niche expansion are isothermality, precipitation of coldest quarter, annual mean temperature, annual precipitation, min temperature of coldest period and precipitation of wettest quarter. The generated information will assist conservation policy makers to make informed decisions.

In this paper we prove a unique common fixed point theorem in 2-metric space .the existence of fixed point for two weakly compatible maps into 2-metric space is established under new contractive condition of integral type by using another functions and

We have synthesis manganese sulfide nano-crystalline (n-MnS) powder using manganese acetate and thiourea, trisodium citrate, from chemical route at different pH. The formation of MnS has been confirmed with help of infrared (IR) spectroscopy by observing bands corresponding to the multi phonon absorption. We have also observed the IR bands at 1403 and 1560 cm-1 due to symmetric and asymmetric stretching of COO of the capped sodium citrate at MnS nano-crystalline particles. The Size of crystal is determined as 3-5 nm with the help of X-ray diffraction. We also deposited the thin film of MnS on glass substrate from the solution using self- aggregation approach. The film thickness is measured as 366 nm with profile meter. The optical band gap is calculated as 3.1-3.5 eV. Its value is found to depend on pH. We also measured dark and photo- conductivity at different temperatures.

Chidambaram coastal zone is covered by Survey of India Toposheet no 58 M / 15 and it is the part of southeast coast of India. During evolution of coastal zone of India was affected many natural hazards like storms, cyclones, floods and tsunami. December 2004 Tsunami was severely affected geomorphology of study area. The present study deal with land use and land cover classification and demarcation of changes in it by the help of Landsat satellite data (1973 and 2009). On the basis of analysis of land use class, we find that built up area class is fastest growing class from 1973 to 2009 and it flow the same trend after 2009. The fastest growth of built up class is result of population explosion and urbanization. The impact of these growths is inversely related to forest class. The dominant land use category is crop land and covered 15.22% of total land in 1973. The present study shows that GIS and remote sensing techniques can play important role for making better planning and rational use of natural resources in future.

Social network based-recommendation has some benefits that it approach used for improve of recommendation systems. Recommendation systems are appropriate tools for provide useful and suitable recommendations in social networks. However, in recent years researches has been done on recommender systems on social network, but there is the lack of a comprehensive study on the literature review and classification of these models. We reviewed the related articles and then classified those by the year of publication and their main techniques. The articles are categorized into four techniques, includes tag-based, context-based, social influence-based and trust-based recommendation system on social network. Our research provides information about trends in recommender systems on social network research by examining the publication years of the articles and used techniques, and show future direction on recommender systems on social network.

Experiments were conducted to assess the relatedness of different subfamilies of Erebidae family using RAPD-PCR technique. The genomic DNA of thirteen different species of Erebidae moths belonging to different subfamilies of Erebinae, Calpinae and Hypocalinae were subjected to RAPD-PCR analysis. A total of 300 bands were scored with five RAPD primers, of which 291 were polymorphic bands while 9 were monomorphic bands; the percentage of polymorphism was 97%. Dendrogram revealed that the thirteen species were grouped into three major clusters and four subclusters.

This study analyses peer tutoring sessions of two groups of advanced diploma financial accounting students with mixed proficiency. Many studies in peer tutoring have highlighted the positive results of the approach due to the scaffolding process which promotes effective learning. Hence, in this study, much emphasis is placed on the scaffolding element. The students’ peer-tutoring sessions in analysing case studies were video-taped and they were followed by the production of individual student diary entries and interviews in order to increase understanding of the experience gained during the sessions. In addition, the researcher’s observation notes were analysed to increase understanding of the group process. The findings reveal that the scaffolding process was evident during the peer tutoring. It resulted in the tutors assisting the tutees in increasing understanding, clarifying ideas, gaining new information, organising their answers, and improving their command of English. Therefore, peer tutoring is advocated in helping less capable students to learn effectively from their more capable peers.