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Toxicity Study of Multiwalled Carbon Nanotubes on Freshwater Aquatic Algae

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Nanotechnology based applications had been extended to almost all aspects of daily life, however, the ecotoxicity of nanomaterials especially multiwalled carbon nanotubes is not well studied. The present study, therefore, dealt with the evaluation of ecotoxicity of multiwalled carbon nanotubes (MWCNTs) against fresh water algae i.e., Chlorella which was collected from the authorised collection centre and maintained in the laboratory giving appropriate growth conditions. MWCNTs suspensions were prepared in various concentrations from 0.06 mg/ml to 0.24 mg/ml using algal test medium and further quantified by UV/Vis spectroscopy. It has been observed that with the increase of the concentrations of MWCNTs, the growth of algae and the lipid production decreases simultaneously. It shows 24.13% less growth and 5.06% less lipid production compare to control at maximum concentration of MWCNTs i.e., 0.24 mg/ml. Toxicity of MWCNTs was further confirmed through transmission and scanning electron microscopic images of algae.
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Keywords: ALGAE; CHLORELLA; ECOTOXICITY; ELECTRON MICROSCOPY; LIPID; MULTIWALLED CARBON NANOTUBES (MWCNTS); NANOTECHNOLOGY

Document Type: Research Article

Publication date: October 1, 2013

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  • Bionanoscience attempts to harness various functions of biological macromolecules and integrate them with engineering for technological applications. It is based on a bottom-up approach and encompasses structural biology, biomacromolecular engineering, material science, and engineering, extending the horizon of material science. The journal aims at publication of (i) Letters (ii) Reviews (3) Concepts (4) Rapid communications (5) Research papers (6) Book reviews (7) Conference announcements in the interface between chemistry, physics, biology, material science, and technology. The use of biological macromolecules as sensors, biomaterials, information storage devices, biomolecular arrays, molecular machines is significantly increasing. The traditional disciplines of chemistry, physics, and biology are overlapping and coalescing with nanoscale science and technology. Currently research in this area is scattered in different journals and this journal seeks to bring them under a single umbrella to ensure highest quality peer-reviewed research for rapid dissemination in areas that are in the forefront of science and technology which is witnessing phenomenal and accelerated growth.
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