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Murugaiyan, V.,Saravanane, R.,Sundararajan, T. Techno-Press 2009 Geomechanics & engineering Vol.1 No.4
One-dimensional soil-column studies were carried out to understand the interaction of three industrial effluents namely amino acid ('highly acidic'), surfactant ('highly organic') and pharmaceutical ('organic and toxic') on the physicochemical behavior, index properties and shear strength of bentonite due to artificial contamination extending to nearly 300 days. Changes in inorganic and organic pollutants present in the effluents due to the interaction of the above effluents and soil were assessed to understand the physico-chemical behaviour. Batch and continuous modes of operation, 8 hrs and 16 hrs Hydraulic Retention Time [HRT] and 25%, 50% concentrations of effluents, were the parameters considered. Amino acid, surfactant and pharmaceutical effluents have shown a high variation in pH (7 to 8) after artificial contamination on bentonite that is their original characteristics of the above effluents have been completely reversed. Further, it is found that the shear strength of bentonite has reduced by about 20%, and with respect to liquid limit and plastic limit shows an increasing trend with time within the period of contamination.
Zinc Metal Solubilization by Gluconacetobacter diazotrophicus and Induction of Pleomorphic Cells
( Saravanan ),( Venkatakrishnan Sivaraj ),( Jabez Osborne ),( Munusamy Madhaiyan ),( Lazar Mathew ),( Jong Bae Chung ),( Ki Sup Ahn ),( Tong Min Sa ) 한국미생물생명공학회 2007 Journal of microbiology and biotechnology Vol.17 No.9
Saravanan, Manoharan,Nam, Sang-Eun,Eom, Hye-Jin,Lee, Do-Hee,Rhee, Jae-Sung Elsevier 2019 COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLO Vol.216 No.-
<P><B>Abstract</B></P> <P>Low concentrations of nonylphenol (NP) in aquatic environment can induce drastic effects on the endocrine system in animals. In this study, we examined the modulatory effects of NP on reproductive and physiological parameters in juveniles of the red seabream and black rockfish following waterborne NP exposure (0, 1, 10, and 50 μg L<SUP>−1</SUP>) for 60 days. In red seabream exposed to 50 μg L<SUP>−1</SUP> NP, plasma levels of 17β-estradiol (E2) and 11-ketotestosterone (11-KT) were significantly lower at 30 and 60 days, while E2 levels were slightly higher in 10 μg L<SUP>−1</SUP>-exposed individuals at day 30. Similarly, significantly lower levels of E2 and 11-KT were observed in 10 and 50 μg L<SUP>−1</SUP>-exposed black rockfish at 60 days, whereas the E2 level was higher in 1 μg L<SUP>−1</SUP>-exposed individuals at day 30. After exposure to NP, plasma and mRNA levels of vitellogenin (VTG) were significantly higher in both species at 30 and 60 days, similar to the inducible effects from synthetic estrogen. Plasma cortisol levels were significantly elevated by relatively higher concentrations of NP (10 and 50 μg L<SUP>−1</SUP>) at 30 and 60 days. Finally, 60 days of exposure of 50 μg L<SUP>−1</SUP> NP significantly decreased the gonadosomatic index (GSI) and increased the hepatosomatic index (HSI) in both species. The results obtained from this study provide an evidence of the endocrine disrupting potential of waterborne NP on early stages of economically important marine fish. The NP-triggered endocrine modulation can induce effects on the development of reproductive and metabolic organs in fish species.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Direct evidence on accumulation of waterborne NP in marine fish blood. </LI> <LI> Strong endocrine disruption potential of NP on juvenile stage of marine fish. </LI> <LI> Analysis of NP-triggered stress induction and modulation of somatic parameters. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Saravanan, K.,Ham, Hyungwon,Tsubaki, Noritatsu,Bae, Jong Wook Elsevier 2017 Applied catalysis. B, Environmental Vol.217 No.-
<P><B>Abstract</B></P> <P>The recent rising demand of renewable energies and climate changes has been driving intensive academic researches into new chemical routes to sustainable and clean fuel productions in order to meet the demands of industrial evolution by solving energy crisis due to limited fossil fuel reservoirs and increasing environmental pollutants. Dimethyl ether (DME) is a multi-purpose synthetic fuel and chemical that can be used as an excellent alternative to diesel fuel and liquefied petroleum gas (LPG). The present review paper briefly provides an overview of the recent developments for a direct synthesis of DME from synthesis gas (syngas, CO+H<SUB>2</SUB>) over some hybridized bifunctional heterogeneous catalysts composed of copper-based hydrogenation catalysts with solid acid components such as alumina or zeolites mainly, where the catalytic activities significantly depend on its properties influenced by synthesis protocols, porosities, surface areas, interactions of active metals with supports, distributions of metal particles on the supports and so on. We have also briefly covered the hydrogenation of CO<SUB>2</SUB>, a model reaction for the utilization of CO<SUB>2</SUB> containing in syngas, to produce DME and thereby significantly mitigate its environmental impacts. Furthermore, the catalytic performances of the direct synthesis of DME by hydrogenation of carbon oxides were explained in terms of the acid sites of the solid acid catalysts and surface area of metallic copper nanoparticles in the hybridized bifunctional catalysts with their preparation protocols.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Dimethyl ether (DME) is a multi-purpose alternative synthetic fuel for diesel and liquefied petroleum gas. </LI> <LI> Recent direct DME synthesis from syngas was overviewed over hybridized bifunctional catalysts. </LI> <LI> Surface acidity and metallic sites for CO or CO<SUB>2</SUB> hydrogenation to DME are crucial factors. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Saravanan Gowrisankar,이가영,김재녕 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.4
Synthesis of 4-substituted 3-exo-methylenechroman derivatives was carried out by the n-Bu3SnH-mediated vinyl radical cyclization as the key step starting from various salicylaldehydes.