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Articles by G. Annadurai
Total Records ( 10 ) for G. Annadurai
  M. Jayarajan , R. Arunachalam and G. Annadurai
  The plan of the present study was to discover the effect of agricultural waste product nano-porous adsorbent of Jack fruit peel waste for removing dye Rhodamine dye (Rd) from aqueous solution. The effect of adsorption isotherm were studied by carrying out a series of isotherm at different adsorbent dosages (1.0, 2.0, 3.0 g L-1), temperatures (30, 40 and 60°C) and pH (4.95, 8.14, 9.74), respectively. The adsorption equilibrium data were analyzed by using various adsorption isotherm models and the results have shown that adsorption behavior of the dye could be described reasonably well by langmuir and freundlich models. The characteristic parameters for each isotherm have been determined. The monolayer adsorption capacity determined was reasonably high (g L-1) at adsorbent dosage 4.361 (g L-1), temperature 2.8496 (g L-1) and pH 4.3614 (g L-1) for adsorption of Rd dye, respectively. The monolayer adsorption capacity was determined to be 4.361 to 1.98 mg g-1. We concluded based on these results that Jackfruit peel nano-porous adsorbent was an attractive candidate for removing Rd dye from the wastewater.
  K. Paulkumar , R. Arunachalam , R. Kameswaran , R. Ramanibai and G. Annadurai
  The present investigation made in documenting the in vitro anti-proliferative activity of indirubin-3’-monoxime on human epithelial larynx cell line (Hep-2 cells). The Indirubin propensity for anti-proliferative effects was studied and its mechanism of action was documented using the techniques Trypan blue staining, MTT assay and propidium iodide staining. We observed a dose dependent cell death on treatment with indirubin-3-monoxime. On the basis of results, we concluded, indirubin-3’-monoxime inhibits the proliferation of Human laryngeal cancer cells (Hep-2).
  C.R. Shalinimol , R. Arunachalam and G. Annadurai
  In this present investigation, soil samples were collected from two different paddy fields such as Kollemcode (Tamil Nadu) and Pappanancode (Kerala) using PVC pipes. The physico-chemical characteristics of the soil sample were analyzed. Organic content, nutrient content and numbers of ciliates were high in upper segments of soil samples were recorded. The ciliates were higher amount in wet field paddy soil than flooded field paddy soil. The ciliates such as Microthorax sp., Vorticella sp., Oxytricha sp. and Euplotes sp. were identified in both field samples. In enriched culture, Microthorax sp., Vorticella sp., amoebae and some small flagellates were also observed. It was shown that the distribution of protozoan cells was not even but greatly conglomerative among soil aggregates. On the basis of data generated from this study could be exploited for wastewater treatment studies.
  M. Amutha , R. Arunachalam , M. Umamaheswari , A. Usharamalakshmi , S. Ramakrishnan and G. Annadurai
  The present investigation was aimed at to test different Camellia sinensis (tea) extracts such as Magholai (I), 3 roses (II) and chakra gold (III) for their lactose reduction capability in milk with more lactose. Cow, goat, buffalo and two commercial milk samples such as KC and Star were tested for its lactose content. Among these buffalo milk as used as a control due to its high content of lactose (8 mL dL-1). Buffalo milk was treated by tea extracts I, II and III and 0.018, 0.018 and 0.042 mg dL-1 of lactose content were found. Its reveals that the lactose content of milk was well reduced by adding tea extracts and also its suggested peoples to have milk with herbal extracts (tea) who have gastrointestinal problems.
  V. Madhan Chakkaravarthy , R. Arunachalam , S. Vincent , K. Paulkumar and G. Annadurai
  The present study was aimed at to develop a Phosphate Solubilizing Bacteria’s (PSB) inoculum for improving Phosphate (P) uptake on phosphate sludge. Twelve PSB were isolated from three types of rhizosphere soil from Chennai, India were studied for phosphate solubilization on Pikovskaya’s medium. Isolates were subjected and studied for Solubilization Index (SI) for selecting the high efficient strain. In results, the PB08 strain exhibited high SI 4.80 at sixth day incubation and it was grown in vitro for ten days in Pikovskaya’s broth containing 1% tricalcium phosphate (TCP) and 1% Phosphate Sludge (PS). Variation occurs in phosphate solubilization of two media which contain two P source inoculated by the same strain (PB08). Unlike SI and pH drop, fluctuations in phosphate solubilization were observed during 10 days and gradual increase in phosphate solubilization was noted. Values of solubilized tricalcium phosphate ranged from 9.6 to 136 ppm. The results emphasize that the PB08 may be used for inoculum production and their inoculation effect on plant growth can be studied in vivo.
  V.M. Chakkaravarthy , T. Ambrose , S. Vincent , R. Arunachalam , M.G. Paulraj , S. Ignacimuthu and G. Annadurai
  The aim of the present investigation is to test the larvicidal activity of Azadirachta indica (A. Juss) and Datura metel (Linn.) leaf extract against the third instar larvae of C. quinquefasciatus (Say) (Diptera: Culicidae). A. indica and D. metel leaf extracted by hexane and chloroform extract method at various concentrations. The hexane extract of A. indica and D. metel at 62.5, 125, 250, 500 and 1000 ppm were showed 24, 36, 55, 64 and 72.50% mortality where second one shows 9, 17.50, 30, 42 and 57% mortality, respectively. The chloroform extract of A. indica was showed 12, 48.50, 56.50, 73 and 87% mortality where D. metel shows 13.75, 27, 32, 47 and 62% mortality respectively. The hexane and chloroform extract of A. indica and D. metel had significant larvicidal effect with LC50 values were 246.38, 198.82, 709.96 and 562.07 ppm respectively. At 24 h post-treatment against late third instar larvae, the chloroform extracts of A. indica and D. metel were found to be more effective than hexane extracts and caused a larval mortality of 87 and 62%, respectively at 1000 ppm concentration. The larvicidal effect of A. indica and D. metel against C. quinquefasciatus make these plant products are potential alternative to synthetic insecticide in mosquito control plans.
  R. Arunachalam and G. Annadurai
  The aim of the present study was to discover the effect of low-cost and ecofriendly nano-porous adsorbent (orange peel) as an ideal alternative to the current expensive methods of removing dye Bromophenol blue (Bb) from aqueous solution. The effects of various experimental parameters (e.g., dye concentration, temperature and pH) were investigated by batch equilibrium experiments. The fitness of Langmuir model in the present system shows the formation of monolayer coverage of the adsorbate at the outer space of the adsorbent. Freundlich model isotherm was analyzed. The monolayer adsorption capacity determined was reasonably high (mg g-1) at Temperature (30, 45, 60°C) 88.11 (mg g-1) and pH (5.5, 6.8, 7.8) 149.760 (mg g-1) for adsorption of Bromophenol blue dye, respectively. The values of dimensionless equilibrium parameter like separation factor (RL) at different particle size and temperature indicates the favorability of the process described in the present study. The kinetics of Bromophenol blue dye adsorption nicely followed pseudo-first and second order rate expression and a significant role in the adsorption mechanism. Langmuir and Freundlich models could be used to describe dye sorption on nano porous adsorbent at equilibrium and also the kinetic data gave a better fit. The model fits the second order equation well with correlation coefficients of 0.99967. The adsorption behavior of Bb on orange peel was investigated by FT-IR technique. We concluded on the basis of the results shown in this study that orange peel was an attractive candidate for removing Bb dye from the dye wastewater.
  M. Jayarajan , R. Arunachalam and G. Annadurai
  The aim of the present study is to discover the effect of nano-porous adsorbent of Pomelo fruit peel wastes for removing Congo red dye (CR) from aqueous solution. In batch equilibrium experiments, the CR dye solutions were prepared by dissolving dye in deionzied water to the required concentrations. The effect of adsorption isotherm were calculated by carryout a series of isotherm at different adsorbent dosages (1.0, 2.0, 3.0 g L-1), temperatures (30, 40 and 60°C) and pH (5.99, 6.72, 8.73), respectively. The adsorption equilibrium data were analyzed by using various adsorption isotherm models and the results have shown that adsorption behavior of the dye could be described reasonably well by Langmuir and Freundlich models. The characteristic parameters for each isotherm have been determined. The monolayer adsorption capacity determined was reasonably high (g L-1) at adsorbent dosage 1.049 (g L-1), Temperature 1.081 (g L-1) and pH 1.270 (g L-1) for adsorption of CR dye respectively. The monolayer adsorption capacity was determined to be 1.08 to 0.75 mg g-1. We concluded based on these results that Pomelo peel nano-porous adsorbent was an attractive candidate for removing CR dye from the wastewater. The present study suggests that the modified Pomelo peel nano-adsorbent was a cost-effective and attractive candidate for dyestuff removal from industrial wastewater.
  P. Karthiga , R. Soranam and G. Annadurai
  In nanotechnology, nanoparticles have terrific application in biomedicine due to its novel properties and its eco-friendly nature. The present study reports a facile biosynthesis of silver nanoparticles from the rind extract of Garcinia mangostana, a medicinal plant which acts as a reducing agent. The Surface Plasmon Resonance (SPR) of the silver nanoparticles was characterized using UV-V is spectrophotometer and observed at 460 nm. The nanoparticles were found as spherical and the particle size ranges from 30-40 nm from the Scanning Electron microscopy. The XRD data (X-ray diffraction) shows the crystalline nature and the presence of elemental silver in the synthesized nanoparticles were observed using EDX (Energy dispersive X-ray spectrophotometer) analysis. The interaction of nanoparticles with the extract of G. mangostana was carried out by FT-IR (Fourier Transform Infra red spectroscopy). Various compounds in the rind extract were identified by Thin Layer Chromatography (TLC). Using High Performance Liquid Chromatography (HPLC), the percentage of the compound was analyzed. Then the total number of compounds in methanolic extract of the rind and the molecular weight of particular compound were carried out by Gas Chromatography-Mass Spectroscopy (GC-MS). Finally, the activity of crude extract and synthesized nanoparticles was tested against the human pathogens E. coli, Bacillus subtilis and Aspergillus niger. Various concentrations of the nanoparticle in colloidal form were used to analyze the activity starting from 20 μL for bacteria and 100 μL for fungi. The silver nanoparticle of the rind extract of Garcinia mangostana exhibited strong bactericidal and fungicidal activity which was observed by clear zone of inhibition and it has wide application in the field of medicine.
  S. Michael Anto and G. Annadurai
  Arsenic is a major pollutant for the environment, therefore using Chitosan nanoparticle the adsorption study was performed for adsorbing the Arsenic. Chitosan nanoparticle was prepared by ionic gelation method by using chitosan and Sodium tripolyphosphate (CS-STPP). The morphology and structure of chitosan nanoparticles was characterized Scanning Electron Microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) spectra and X-ray diffraction (XRD) showed the chitosan converted into chitosan nanoparticle. The adsorption capacity and adsorption isotherms using Langmuir and Freundlich isotherm for arsenic ions were investigated by equilibrium studies. Factors such as concentration of Chitosan nanoparticle, temperature effect on adsorption of arsenic and effect of pH and adsorption capacity was investigated. It is found that chitosan nanoparticles could adsorb arsenic (arsenic trioxide) effectively, the maximum capacity of arsenic (arsenic trioxide) adsorbed was obtained in Langmuir isotherm equation which showed it followed monolayer adsorption of Langmuir isotherm experimental data of arsenic adsorption equilibrium correlated well with the Langmuir isotherm equation, thus showing that chitosan nanoparticle is a good adsorbent for adsorption of water from aqueous solution.
 
 
 
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