Synthesis and Anxiolytic Activity of some novel benzotriazole derivatives

1,2,3-Benzotriazole (BTA) is a heterocyclic compound with three nitrogen atoms. It is a polar and colourless compound which can be used for its great versatility. The enormous investigations on derivatives of benzotriazole reveal wide applicability for tagging and delivering a number of heterocyclic nuclei with this molecule. In the present work synthesis of several derivatives of 2-(substituted)-5-[(N-benzotriazolomethyl)-1,3, 4-thiadiazolyl]- imidazole-2-thione has been synthesized and are evaluated for their anxiolytic activity. The antianxiety activities of the synthesized derivatives were evaluated using EPM test and Bright and dark box test experimental models of anxiety. All results were expressed as mean± standard error mean (SEM) and analysed by one-way ANOVA. Post-hoc comparisons were performed by applying Dunnet’s test. P <0.05 was considered statistically significant. Keywords: Benzotriazole; Thiadiazole; Thiazolidinone; Anxiolytic Activity; Anxiety; Elevated Plus Maize; Bright and Dark Arena.

Purple heart plant leaves extract-mediated silver nanoparticle synthesis: Optimization by Box-Behnken design

The present research work describes a novel method for green synthesis of silver nanoparticles using purple heart plant leaves extract, which is recognized as frequently found in households as an ornamental plant. The aqueous methanolic extract of purple heart plant leaves was prepared and employed in the synthesis of stable silver nanoparticles via biological reduction method. The purple heart plant leaves extract-mediated synthesized silver nanoparticles were systematically optimized using Box-Behnken design considering the effect of various independent variables (factors) like concentration of AgNO₃, temperature and volume of purple heart plant leaves extract solution on the responses like particle size and polydispersity index of synthesized silver nanoparticles were optimized. Mathematical modelling was performed using quadratic polynomial model and response surface analysis was done to understand the factor-response relationship. The synthesized silver nanoparticles at optimum condition were found to be of spherical in shape under TEM with particle size of 98 nm and polydispersity index of 0.15. Optimized silver nanoparticles were further characterized through UV-VIS spectrophotometry, FTIR spectroscopy and TEM imaging studies. Also, the silver nanoparticles were evaluated for antibacterial activity on E. coli and S. aureus. In a nutshell, the studies construed successful synthesis of silver nanoparticles along with thorough understanding of the associated factors influencing their quality characteristics and significantly improved antibacterial activity as beneficial effect.