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Dwivedi S.,CSIR - Central Electrochemical Research Institute | Mishra A.,CSIR - Central Electrochemical Research Institute | Kumar A.,CSIR - Central Electrochemical Research Institute | Tripathi P.,CSIR - Central Electrochemical Research Institute | And 6 more authors.
Clean Technologies and Environmental Policy | Year: 2012

During the present study, two species of Portulaca, i.e., P. tuberosa and P. oleracea were collected from two field sites in Vadodara, Gujarat, India; one irrigated with industrial effluent and other with tube well water, and were analyzed for heavy metal accumulation in different plant parts viz., roots, stem, leaves, and flowers. Plants collected from effluent irrigated areas showed high accumulation of all the investigated heavy metals in all plant parts with the maximum being in roots and the least in flowers. Interestingly, both species of Portulaca demonstrated hyperaccumulation of multiple elements viz., Cu, Ni, Hg, and Pb. The total shoot concentrations (μg g -1 dw) of Cu, Ni, Hg, and Pb in P. tuberosa were 1538, 1191, 789, and 2744, respectively, while in P. oleracea, these were 1940, 1542, 534, and 2312, respectively. Besides this, selective hyperaccumulation of Se (2,327 μg g -1 dw) and Al (1,164 μg g -1 dw) was shown by P. tuberosa and P. oleracea, respectively. Total shoot concentrations (μg g -1 dw) of Mo were about 399 and 668 in P. tuberosa and P. oleracea, respectively. Overall, P. oleracea accumulated higher amounts of multiple metals from industrial effluent contaminated site, hence appears to be a suitable candidate for phytoremediation purposes of metal contaminated areas. © 2011 Springer-Verlag.

Tiwari K.K.,Sophisticated Instrumentation Center for Applied Research and Testing | Singh N.K.,CSIR - Central Electrochemical Research Institute | Rai U.N.,CSIR - Central Electrochemical Research Institute
Bulletin of Environmental Contamination and Toxicology | Year: 2013

In the present investigation, chromium (VI) induced toxicity on metabolic activity and translocations of nutrients in radish were evaluated under controlled glass house conditions. Chromium was found to induce toxicity and significantly affect plant growth and metabolic activity. Excess of chromium (0.4 mM) caused a decrease in the concentration of iron in leaves (from 134.3 to 71.9 μg g-1 dw) and significant translocation of sulphur, phosphorus and zinc. Translocation of manganese, copper and boron were less affected from root to stem. After 15 days of Cr exposure, maximum accumulation of Cr was found in roots (327.6 μg g-1 dw) followed by stems (186.8 μg g-1 dw) and leaves (116.7 μg g-1 dw) at 0.4 mM Cr concentration. Therefore, Cr may affect negatively not only production, but also the nutritive quality of the radish; likewise, higher Cr content may cause health hazards for humans. © 2013 Springer Science+Business Media New York.

Mishra V.,Institute of Science and Technology for Advanced Studies and Research ISTAR | Mishra V.,Sophisticated Instrumentation Center for Applied Research and Testing | Mohanty I.,Institute of Science and Technology for Advanced Studies and Research ISTAR | Patel M.R.,Institute of Science and Technology for Advanced Studies and Research ISTAR | Patel K.I.,Institute of Science and Technology for Advanced Studies and Research ISTAR
International Journal of Polymer Analysis and Characterization | Year: 2015

A series of novel waterborne UV-curable polyurethane dispersions were synthesized from castor oil, IPDI, DMPA, and HEMA by the acetone process. The prepared UV-PUD was mixed with three different monomers and characterized for the parameters relevant to the study by physical, spectroscopic, and chemical methods. The effect of monomer type on the physicochemical and thermal properties of UV-PUDs revealed that the number of unsaturated groups present in the monomer had a pronounced effect on physicochemical, mechanical, and thermal properties. The combination of renewable resource and environmentally compliant technology give these UV-PUDs potential scope in coating applications. © 2015, Copyright © Taylor & Francis Group, LLC.

Bhattacharya T.,Institute of Science and Technology for Advanced Studies and Research | Tiwari K.K.,Sophisticated Instrumentation Center for Applied Research and Testing
Journal of Environmental Biology | Year: 2010

The present investigation was undertaken to assess the biodegradation of phenol by native bacteria strains isolated from coke oven processing wastewater. The strains were designated ESDSPB1, ESDSPB2 and ESDSPB3 and examined for colony morphology Gram stain characters and biochemical tests. Phenol degrading performance of all the strains was evaluated initially One of the strains namely ESDSPB2 was found to be highly effective for the removal of phenol, which was used as sole carbon and energy source. From an initial concentration of 200 mg ť it degraded to 79.84±1.23mg I'. In turn the effect of temperature (20 to 45°C), pH (5-10) and glucose concentration (0,0.25 and 0.5%) on the rate of phenol degradation by that particular strain was investigated. Observations revealed that the rate of phenol biodégradation was significantly affected by pH, temperature of incubation and glucose concentration. The optimal conditions for phenol removal were found to be pH of 7 (84.63% removal), temperature, 30°C (76.69% removal) and 0.25% supplemented glucose level (97.88% removal). The main significance of the study is the utilization of native bacterial strains from the waste water itself having potential of bioremediation. © Triveni Enterprises, Lucknow (India).

Chauhan G.R.,Sophisticated Instrumentation Center for Applied Research and Testing | Chauhan G.R.,P.A. College | Kharadi G.J.,Government Science College | Patel K.D.,Sophisticated Instrumentation Center for Applied Research and Testing | Patel K.D.,P.A. College
Oriental Journal of Chemistry | Year: 2010

The mixed-ligand complexes of various metal(ll) with 5-chloro-7-iodo-8- hydroxyquinoline (Clioquinol) and 5-(methoxymethyl-8-quinolinol) (MMQ) were prepared. The structure of mixed-ligand complexes was investigated using spectral, physicochemical, elemental analyses and thermal studies. Magnetic moment and reflectance spectral studies reveal that an octahedral geometry has been assigned to all the prepared complexes. The ligands, metal salts, complexes, control and standard drug were tested for their in-vitro antifungal.The metal complexes exhibit good activity against fungal strains compared with parental compounds and moderate compared with the standard drug (Clioquinol).

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