Bharathiar University

About: Bharathiar University is a education organization based out in Coimbatore, Tamil Nadu, India. It is known for research contribution in the topics: Thin film & Adsorption. The organization has 5812 authors who have published 8628 publications receiving 143934 citations. The organization is also known as: BU.

Biodecolourization of textile dyes by novel, indigenous Pseudomonas stutzeri MN1 and Acinetobacter baumannii MN3

Abstract: Enormous quantities of toxic dyes containing textile effluents are being discharged in natural water systems and thus contaminate the water quality. Hence it is important to develop an eco-friendly and cost effective technology to treat the dyes contaminated wastewater. In this research, laccase enzyme mediated biodegradation of toxic textile dyes such as congo red and gentian violet was investigated using novel, newly isolated laccase producing Pseudomonas stutzeri MN1 and Acinetobacter baumannii MN3. Response surface methodology (RSM) with full factorial central composite design (CCD) was applied to optimize pH (pH 6.0–10.0), starch (1–3%) and yeast extract (0.1–0.3%). The RSM results show that a maximum of 29.41 U/ mL and 41.76 U/ mL laccase activity was achieved by MN1 and MN3, respectively under optimum conditions (pH 8.0, 2% starch and 0.2% yeast extract). The congo red decolorization studies by MN1, MN3 and mixed consortia (MN1 + MN3) showed 84%, 89% and 97% decolourization efficiency, respectively. The gentian violet was decolorized up to 83%, 90% and 95% by MN1, MN3 and mixed consortia (MN1 + MN3), respectively. Phytotoxicity assay showed100% germination of Vigna radiata in presence of decolorized synthetic congo red and gentian violet. Crude extract of laccase decolorized congo red and gentian violet up to 70% and 84% respectively within 24 h. The laccase producing MN1 and MN3 strains can be used to decolorize and detoxify the textile effluents and assist in wastewater treatment.

Effect of Heavy Metals on the Blood Protein Biochemistry of the Fish CYPRINUS CARPIO AND ITS USE AS A BIO-INDICATOR OF POLLUTION STRESS

Abstract: Cyprinus carpio were exposed to two non-essential (Hg and Pb)and two essential (Cu and Ni) heavy metal salts at lethal andsub-lethal concentrations. Blood serum total protein, serum globulinand serum albumin was analysed every 2 hr for 24 hrs andagain at 48 and 72 hrs. Serum protein and globulin level showedan intial sharp increase from 2 to 20 hrs, followed by decline thatextend over a period of 72 hrs. Serum albumin showed an initialimmediate decline from 2 to 4 hrs, followed by an intermittent period of recovery and decline that extend over a period of 72hrs. Both lethal and sub-lethal concentrations of metal salts elicited asimilar pattern of response varying only in magnitude. The use offish blood serum protein, albumin and globulin measurements as general indicators of pollutant stress response isdiscussed.