Informatics Publishing Limited

Amita Hajra ¹, Naba K. Mondal ¹

Affiliations
1 Environmental Chemistry Laboratory, Department of Environmental Science, The University of Burdwan, Golapbag, Burdwan, 713104, West Bengal, IN

Abstract

An easy and facile method of biosynthesizing silver nanoparticles (AgNP) is presented. With an attempt to utilize aquatic fernAzollapinnata, its aquatic extract was used to reduce silver nitrate (AgNO₃) to silver nanoparticles. The synthesis occurred at room temperature just after mixing the extract with the salt solution which was detected by UV-Vis spectrophotometer that gave its characteristic absorbance at 445 nm. FTIR image reveals the functional groups which are responsible for reducing and capping the silver nanoparticles. SEM and TEM images show the spherical shape and size of the formed particles. Fluorescent microscopic study also shows the spherical silver nanoparticles. These results proves Azollapinnata to be a good source of reducing agent for the environment friendly and low cost synthesis of silver nanoparticles.

Keywords

AgNP, Azollapinnata, UV-Vis, SEM, TEM.

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Vivek M. Datar ¹, Naba K. Mondal ²

Affiliations
1 INO Cell, Tata Institute of Fundamental Research, Mumbai 400 005, IN
2 Saha Institute of Nuclear Physics, Kolkata 700 064, IN

Abstract

India has a rich history in neutrino physics. The first ever atmospheric neutrino interaction was observed in the deep underground laboratory at the Kolar Gold Fields (KGF) Karnataka in 1965. This laboratory later also looked for nucleon decay and placed limits on the proton lifetime. The KGF underground laboratory ceased its operation in 1992 due to the closure of the mine. The India-based Neutrino Observatory (INO) project is a recent initiative to develop a new underground laboratory to conduct experiments in the area of neutrino physics and dark matter searches under a mountain with at least 1000 m rock cover. It is expected that over the years, INO will become a full-fledged underground science laboratory hosting experiments that can exploit its special low background environment and infrastructure.

Keywords

Dark Matter, Neutrino Physics, Particle Detectors, Underground Laboratory.

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Naba K. Mondal ¹, Uttiya Dey ¹, Kousik Das ¹, Jayanta K. Datta ¹

Affiliations
1 Department of Environmental Science, The University of Burdwan, Burdwan, West Bengal, 713104, IN

Abstract

Agrochemicals are added to the fanning systems to improve production[l]. They include pesticides and fertilizers which 'stimulate or regulate the growth of or control pests of, agriculture, horticulture or plantation crops, and of domesticated livestock. The origin and concept, known exactly, of pesticide is not known. Pesticides or insecticides are among the most extensively used chemicals in the world today and they are also the most hazardous compounds to the human being as well.

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