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Abraham, Jayanthi
- Effect of Salinity on an Entomopathogenic Biocontrol Nematode, Hetrorhabditis indica
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Authors
Affiliations
1 School of Biosciences and Technology, VIT University, Vellore-632 014, Tamil Nadu, IN
1 School of Biosciences and Technology, VIT University, Vellore-632 014, Tamil Nadu, IN
Source
Nature Environment and Pollution Technology, Vol 10, No 4 (2011), Pagination: 601-603Abstract
Entomopathogenic nematodes, especially ICRI-18, a strain of Heterorhabditis indica, are being used as efficient biological control agent for a sub-terranean pest called Basilepta fulvicorne affecting cardamom plant ischolar_mains. The cardamom plantation has been spread over the western ghats of south India where H. indica (strain ICRI-18) is used for the control of ischolar_main grub. Salinity plays a significant role in microbial interactions and all inhabitants of soil. As the method of irrigation varies from place to place so does the salinity of water and soil. As salinity plays a key role in survival of soil organisms, the aim behind the present study was to investigate the compatibility of the bio-control agents with salinity. The effect of sodium chloride over H. indica at various concentrations (0.1M to 0.5M) was evaluated. The observations revealed that salinity did cause a proportional mortality to that of salt concentration. However, more than 80% of nematodes survived up to 0.3M concentration, after which there was a drastic reduction of the nematode population. The nematode population reduced at 0.4 M considerably, which can be concluded that salinity of the soil at cardamom plantations did not cause any adverse effect on the nematodes.Keywords
Entomopathogenic Nematodes, Heterorhabditis indica, Cardamom Plantations, Salinity.Full Text
- Synthesis and Characterization of Chitosan Nanoparticles and Their Application in Removal of Wastewater Contaminants
Abstract Views :425 |
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Authors
Affiliations
1 Microbial Biotechnology Lab, School of Biosciences and Technology, VIT University, Vellore-632 014, T. N., IN
1 Microbial Biotechnology Lab, School of Biosciences and Technology, VIT University, Vellore-632 014, T. N., IN
Source
Nature Environment and Pollution Technology, Vol 17, No 2 (2018), Pagination: 469-478Abstract
The purpose of this study was to synthesise, characterize and evaluate environmental application (degradation of dyes and pesticides) of chitosan nanoparticles. The chitosan nanoparticles were synthesized by ionic gelation process and characterized. The physicochemical properties of the nanoparticles were determined by size and zeta potential analysis, scanning electron microscope (SEM), atomic force microscopy (AFM), FTIR analysis and XRD pattern. The photocatalytic degradation was studied with the help of industrial dyes, and pesticides. Adsorption experiments were carried out to highlight the adsorption efficiency of the organic compound with different parameters like pH, dosage and time. A sharp increase in the percent reduction of dyes and pesticides was observed as the adsorbent dose increased. The kinetic data were modelled with the pseudo first-order and pseudo second-order kinetic equations.Keywords
Chitosan Nanoparticles, Ionic Gelation, Adsorption Kinetics, Wastewater Contaminants, Degradation.Full Text
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