Biosynthesis of Silver nanoparticles Using Rosaceae Petal extract and analysing its antimicrobial assay

Recent developments in nanoscience and nanotechnology have brought about a fundamental shift in the way we identify, treat, and prevent numerous diseases in all aspects of human life. Silver nanoparticles (AgNPs) are among the most significant and intriguing metallic nanoparticles employed in biomedical applications. AgNPs are very important for the domains of nanomedicine, nanoscience, and nanotechnology. Although numerous noble metals have been used for a wide range of applications, AgNPs have drawn special attention because of their potential for use in cancer treatment and diagnosis. The study showed an efficient method for the successful synthesis of AgNPs using petal extract from Rosaceae plants and characterizes them using a UV spectrometer and SEM. The produced AgNPs showed notable antibacterial activity against a variety of microbes, suggesting that they could find use as an antimicrobial agent in a number of different contexts. The work offers insightful information about how AgNPs might be used as a robust antibacterial agent against a variety of microbes

Control of Aedes aegypti and Ae. albopictus, the vectors of dengue and chikungunya, by using pheromone C21 with an insect growth regulator: Results of multicentric trials from 2007-12 in India

Background & objectives: Aedes mosquito control has gained much importance nowadays in view of rise in number of reported cases of dengue and chikungunya in India and other countries. In the present study, C21 attracticide (containing a pheromone and an insect growth regulator-IGR, developed by Defence Research and Development Establishment (DRDE), Gwalior, India was tested for its feasibility for surveillance and control of Aedes mosquito in a multicentric mode from October 2007 to June 2012 in urban (Delhi, and Bengaluru district, Karnataka) and suburban (Alappuzha district, Kerala) settings of the country in three phases. Methods: Across the randomly selected households in each study area, two to four containers treated with attracticide (experimental) and untreated (control) were placed and monitored by trained surveillance workers on weekly/ fortnightly basis for determining the presence of eggs, larvae and pupae. Container positivity, percent larvae, egg and pupae collected were determined during different phases and analyzed statistically using SPSS 18.0. Results: Container positivity was found statistically significant at Bengaluru and Alappuzha, Kerala while in Delhi, it was found non-significant. Eggs collected from experimental containers were significantly higher in comparison to control at all the locations except Delhi. Also larvae collected from control containers were significantly higher at all the locations except Bengaluru. Pupae collected from control containers remained significantly higher at all the locations as no pupal formation was recorded from experimental containers. Interpretation & conclusion: The use of C21 attracticide hampered pupal formation, thus inhibiting adult population in the study areas. The study established that C21 attracticide was efficacious in the field conditions and has potential for use in surveillance and management of dengue and chikungunya mosquitoes