1. copper nanoparticles present in the film.
1. INTRODUCTION About 29% of the planet Earth is covered by landhaving vast biodiversity. From which a very high population belongs to plants andmicroorganisms. Plants are essential member of diversity with various uses.
Of the 2, 50,000 higherplant species present, more than 80,000 are medicinal plants Joy P. P., et al., 1998. Themedicinal properties of the plant are determined by the presence of certainphytochemicals. These phytochemicals incurs the plant with its characteristic colour, flavour, odour whichare part of defence system of the plant. Phytochemicals are bioactive, non-nutrientscompounds in fruits, vegetables, grains and other parts of the plant.
These compounds (eg.isoflavones, anthocyanins, and flavonoids) serves as photoprotectants as they have the ability to repelother harmful organisms Pandya k., et al.
, 2011. 1.1. HISTORY Nanoparticles have a surprisingly long history.Proteins, polysaccharides, viruses among others are the organic nanoparticles occurringnaturally whereas iron oxyhydroxides, metals are examples of inorganic nanoparticles.
Theinorganic nanoparticles are produced due to weathering, volcanic eruptions or microbialprocesses. This is how we know that nanoparticles have been existing in nature for along time and not just produced in the laboratories by modern synthesis Heiligtag F.C.
andNiederberger M., 2013. Its history dates back to the 9th Centuryin Mesopotamia, the artisans used nanoparticles to generate a glittery effect on the surface of pots.This lustre over pots was due to a metallic film that was placed over its surface. This lustreis seen due to the presence of silver and copper nanoparticles present in the film.
Thenanoparticles were made by adding cooper and silver salts and oxides together with vinegar, ochreand clay on the surface of the pot Dr. Mandal A., 2014. In nature variety of nanomaterials are synthesisednaturally by biological processes. For example, the magneto tactic bacteria synthesisinteracellular magnetite or greigite nanocrystallites, diatoms synthesises siliceousmaterials and s-layer bacteria produces gypsum and calcium carbonate layers R. Nithya andR.