Papers by Dr. G. Annadurai
Journal of Applied Sciences and Environmental Management
In the present time, Iron oxide magnetic nanoparticles (IOMNPs) have paid considerable attention ... more In the present time, Iron oxide magnetic nanoparticles (IOMNPs) have paid considerable attention due to their exclusive applications in terms of surface-to-volume ratio, superparamagnetism, high surface area, biosensor, bio-separation, catalysis, and biomedicine. Our goal was to synthesis iron oxide magnetic nanoparticles by chemical route technique. The preparation method had a very large effect on the size, shape, and surface chemistry of the magnetic nanoparticles including their applications. The iron chloride solution was prepared by mixing deionized water with iron chloride tetrahydrate. The synthesized powder was characterized by XRD, UV-vis, SEM, FT-IR, DLS, FL, and TGA techniques. Moreover, antibacterial activity was evaluated using the synthesized IOMNPs against Escherichia coli (A), Pseudomonas (B), Enterobacter (C), Staphylococcus aureus (D), and Bacillus subtilis (E) in the concentration of 0.1 mg and 0.5 mg. The results showed that Bacillus subtilis possess a higher an...
Research Journal of Chemistry and Environment, 2022
In this study, we investigate the dye adsorption capacity and properties of a Chitosan Nanopartic... more In this study, we investigate the dye adsorption capacity and properties of a Chitosan Nanoparticle-MMT Nanocomposite (CSNP - MMT nanocomposite). Chitosan nanoparticles combined with MMT nanocomposite demonstrated excellent adsorption capacity for Rhodamine 6G dye. Adsorption isotherms were used to determine the maximum adsorption capacity and rate of adsorption, demonstrating the superior efficiency of chitosan nanoparticle with MMT nanocomposite over their individual counterparts. With the evaluation of diffusion studies, the mechanism of adsorption is also proposed. In batch experiments, the effects of dosage, pH and temperature on the adsorption process were investigated. The Langmuir, Freundlich and Temkin isotherm models were used to fit the equilibrium data and the best-fit model was determined using the coefficient of determination (R2). The Langmuir model was found to be the best-fitting with R2 very close to unity (0.9995–0.9863) and the highest biosorption capacity 34.26m...
Applied Nanoscience, 2012
The expansion of reliable and eco-friendly process for synthesis of semiconductor nanoparticle is... more The expansion of reliable and eco-friendly process for synthesis of semiconductor nanoparticle is an important step in the emerging field of biomedical nanotechnology. In this communication, the zinc sulfide nanoparticles were biologically synthesized by using Serratia nematodiphila which was isolated from chemical company effluent. The surface plasmon resonance centered at 390 nm on the UV spectrum indicates the presence of zinc sulfide nanoparticles in the reaction mixture (S. nematodiphila and zinc sulfate); EDAX analysis also confirmed the presence of zinc sulfide nanoparticles. Scanning electron microscope image showed that the synthesized zinc sulfide nanoparticles were spherical in nature and nanoparticles of about 80 nm in size were obtained from transmission electron microscope images. The peaks in the XRD spectrum corresponding to (111), (220) and (311) show that the zinc sulfide nanoparticles are crystalline in nature. Fourier transforms infrared spectroscopy shows the functional groups of the nanoparticle in the range of 4,000-400 cm-1. Further, the antibacterial activity of zinc sulfide nanoparticles was examined against Bacillus subtilis and Klebsiella planticola. The maximum zone of inhibition occurred at 200 ll of silver nanoparticles. Due to potent antimicrobial and intrinsic properties of zinc sulfide, it is actively used for biomedical and food packaging applications.
IEEE Transactions on Industry Applications, 2009
ABSTRACT The reaction behavior of mixed dichloromethane (CH2Cl2) and toluene in nonthermal plasma... more ABSTRACT The reaction behavior of mixed dichloromethane (CH2Cl2) and toluene in nonthermal plasma was investigated with a ferroelectric packed-bed reactor. The decomposition efficiencies of 109 ppm CH2Cl2 and 100 ppm toluene were not affected by mixing in the presence of O2. In the decomposition of CH2Cl2 and toluene, CO2 selectivity increased with O2 content. The higher the COx yield, the lower the CO2 selectivity. In N2, cyanides were detected as byproducts from CH2Cl2 and toluene, organic chlorides from CH2Cl2, and benzene from toluene. However, no mixing effect was observed in the byproduct formation. The number and amounts of the byproducts decreased with an increase of O2 content in the background gas. In the presence of O2, formic acid was transiently formed from CH2Cl2, but its amount decreased with the increase in reactor energy density. No oxygen-containing byproducts were newly detected.
Journal of Applied Sciences and Environmental Management
In present years, the synthesis of iron oxide nanoparticles (IONPs) has established excessive pot... more In present years, the synthesis of iron oxide nanoparticles (IONPs) has established excessive potential in biological applications due to their non-toxic role in biological systems, biocompatibility, and biodegradability. Ongoing research efforts focused on IONPs in the expansion of novel technologies as they can be synthesized with surface modification. Here we have studied the antibacterial effects of IONPs which were synthesized effectively through a green synthesis route by using leaf extract of the Carica papaya plant. The formation of IONPs was confirmed by the color change. The crystallinity of IONPs was determined by XRD and the morphology by using SEM, which showed spherical particles of well-dispersed size. The absorption peak was determined by UV–vis spectroscopy at 390 nm. Average particle size distribution was obtained at 56 nm using PSA. FL spectroscopy indicated the higher emission wavelength by redshift at 641.6 nm. TGA showed that the IONPs are thermally stable up ...
Journal of Environmental Science and Technology, 2009
In current study the inhibitory potential of Tridax procumbens leaf extract loading chitosan nano... more In current study the inhibitory potential of Tridax procumbens leaf extract loading chitosan nanoparticle against calcium oxalate crystallization under in vitro condition. Kidney stone formation was studied using three assays such as nucleation, aggregation and growth. Nucleation was studied by adding calcium chloride and sodium oxalate solution in the presence and absence of aqueous extracts at 37˚C. For aggregation and growth calcium oxalate monohydrate crystals were studied. The effect of extracts on the formation and inhibition of stone forming stages were observed UV-Vis spectrophotometrically, In the present study Tridax procumbens plant extract loaded chitosan nanoparticle were prepared via ionic gelation of tripolyphosphate (TPP) methods synthesized nanoparticle was characterized by Scanning Electron Microscope (SEM) and Fourier Transform infrared (FTIR).The present results showed the optimum encapsulation efficiency (77 %) was obtained by a chitosan concentration of 0.1 mg/...
The present study was concluded that the vegetable coating affects positively on the physiochemic... more The present study was concluded that the vegetable coating affects positively on the physiochemical parameters of tomatoes. The coated sample shows significant difference in almost all parameters as compared to control (uncoated) tomatoes. As far as storage period is concerned as increase the quality parameters like weight loss and antimicrobial activity of tomatoes. Melia azedarach mediated silver nanoparticles were Characterize by UV-vis Spectrophotometer, Fourier infrared spectroscopy (FTIR), and Scanning Electron Microscope (SEM) examine the antibacterial activity of biological medicated silver nanoparticles against the microbial strains of E. coli, Streptococcus sp., Klebsiella sp., Bacillus sp., Salmonella sp., Aspargillus niger.
Fucoidan is the foremost marine polysaccharide having bunch of applications in medicinal field. R... more Fucoidan is the foremost marine polysaccharide having bunch of applications in medicinal field. Research field of fucoidan may increase and developed after the 2k years. It is an algal sulfated polysaccharide extracted from nautical brown seaweed. Fucoidan is the one of the major medicinal source having application in clinical, haematological, and biochemical medicines. Explore about fucoidans degrading enzymes, fucoidanases are the main caption in biological chemistry division now a days. Before 2k also some findings would be done about fucoidan but now a day it gets efficient. This review will search that what all intelligence are given about fucoidan and its applications in clinical research after the years of 2k. Then study deals about the structural characterization, biochemical properties and applications of fucoidans.
Plants are widely used for medicinal purpose worldwide for its ethno-medicinal property. The pote... more Plants are widely used for medicinal purpose worldwide for its ethno-medicinal property. The potential of higher plants as source for new drugs is still largely unexplored. Tylophora asthmatica is a tropical medicinal plant used in treatment of asthma, dermatitis and rheumatism. The plant has been described as bronchodilator, emetic, expectorant and diaphoretic. In this study the anti-asthmatic and anti-allergic activity of the plant extract is investigated against bacteria. In this method we are prepared the crude extracts from the plants Tylophora asthmatica using the solvents Benzene, Ethyl acetate and Isopropyl alcohol. And then to analyze the antibacterial activity of the three crude extracts against pathogenic bacteria. And then analyze the Preliminary phytochemicals screening and HPLC analysis.
ZnO oxide Nanoparticle and ZnO oxide with Montmorillonite nanocomposite were prepared by an envir... more ZnO oxide Nanoparticle and ZnO oxide with Montmorillonite nanocomposite were prepared by an environmentally friendly, efficient, and inexpensive method that was synthesized using the chemical method. ZnO nanoparticles as an effective antibacterial material were immobilized on the surface of montmorillonite (MMT). The objectives of this paper are to summarize our research activities in (a) developing processes to dispersenanomaterials (undoped and doped zinc oxide powders) in the polymers matrix, (b) using X-ray diffraction (XRD), Fourier Transform Infra-Red Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Thermo Gravimetric Analysis (TGA) techniques to characterize polymer matrix structures, (c) studying structure-property relationship of these types of new materials, and (d) evaluating the antibacterial performance of these materials for different applications. The results showed that the ZnO nanocomposite was uniformly dispersed in the polymer matrix and the particles...
Nature Environment and Pollution Technology
The green synthesis of metal oxide nanoparticles is an eco-friendly, rapid, and cost-effective de... more The green synthesis of metal oxide nanoparticles is an eco-friendly, rapid, and cost-effective development of novel technologies. The catalyst of nickel oxide (NiO) nanoparticles has been synthesized by the green route's method using Lantana camara Linn and nickel chloride. It was found that plant-mediated synthesis of nickel oxide nanoparticles can greatly enhance the antibacterial and photocatalytic activity at very low concentrations. The synthesized plant-mediated NiO nanoparticle was characterized by the structural and optical properties, morphology, and composition of NiO nanoparticles (NPs) with the help of various techniques such as Ultra Violet (UV) spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Particle Size Analyzer (PSA), Fluorescence Spectroscopy (FL) and the photocatalytic activity studies were investigated. The antimicrobial activity was carried out against Gram-positive and Gram-negative bacteria and NiO NPs showed inhibitory activity in both strains of bacteria with excellent selectivity against Gram-positive bacteria.
Biocatalysis and Agricultural Biotechnology
Abstract In this study, the silver nanoparticles (AgNPs) were synthesized using a strain Bacillus... more Abstract In this study, the silver nanoparticles (AgNPs) were synthesized using a strain Bacillus subtilis KMS2-2 by extracellularly. The effect of calcination (200 °C for 30 min) on structural characteristics and antibacterial activity of the AgNPs were investigated. The inhibitory effect of AgNPs against pathogenic bacteria such as Pseudomonas fluorescens MTCC 1749, Proteus mirabilis MTCC 425, Escherichia coli MTCC 1610, Bacillus cereus and Staphylococcus aureus MTCC 2940 was tested by agar-well diffusion method. The synthesized AgNPs before and after calcination were spherical crystalline in nature and had size range from 18–100 nm and 49–153 nm, respectively and were determined by scanning electron microscope (SEM) and X-ray diffraction analysis (XRD). Further, Fourier transform Infrared spectroscopic (FT-IR) analysis revealed the presence of bioactive compounds in the crude AgNPs as capping materials. The in vitro antibacterial studies revealed that crude AgNPS strongly inhibited the growth of tested pathogenic bacteria, whereas, the calcined AgNPs didn't show growth inhibition activity.
Advanced Science, Engineering and Medicine
Advances in nano research
Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005., 2005
ABSTRACT The reaction behavior of dichloromethane (CH2Cl2)-toluene was investigated with a ferroe... more ABSTRACT The reaction behavior of dichloromethane (CH2Cl2)-toluene was investigated with a ferroelectric packed-bed reactor. The decomposition efficiencies of 109 ppm CH2Cl2 and 100 ppm toluene were not affected by mixing in the presence of O2. In the decomposition of CH2Cl2-toluene, CO2 selectivity increased with the O2 content. The higher the COx yield, the lower the CO2 selectivity. In N2, organic chlorides and cyanides were detected as byproducts from CH2Cl2 and toluene. However, no mixing effect was observed in byproduct formation. On the other hand, the number and quantities of the byproducts decreased as O2 content in the background gas increased. In the presence of O2, no oxygen-containing byproducts were newly detected.
Bioprocess Engineering, 1999
Bioprocess and …, 2000
1 Introduction A million ton of dyes are produced worldwide annually and approximately 15% of suc... more 1 Introduction A million ton of dyes are produced worldwide annually and approximately 15% of such dyes are released in the form of effluents to the mainstreams [1±4]. The dye ef-fluents contain chemicals which are more toxic to eco-systems and environment. The crystal ...
Bioprocess and …, 2000
Biodegradation of phenol by Pseudomonas putida (NICM 2174), a potential biodegradent of phenol ha... more Biodegradation of phenol by Pseudomonas putida (NICM 2174), a potential biodegradent of phenol has been investigated for its degrading potential under different conditions. Pseudomonas putida (NICM 2174) cells immobilized in chitosan were used to degrade phenol. ...
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Papers by Dr. G. Annadurai