The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Gérald Bernardinelli - One of the best experts on this subject based on the ideXlab platform.
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Supramolecular structure of the polymeric Eu(III) complex with pyridine-2,6-Dicarboxylic Acid
Polyhedron, 2009Co-Authors: Josef Hamacek, Soumaila Zebret, Gérald BernardinelliAbstract:The europium complex with pyridine-2,6-Dicarboxylic Acid forms three-dimensional polymers in the solid state. The crystal structure of this assembly shows that europium cation is nine-coordinated and the first coordination sphere contains four water molecules. Mono(dipicolinate) structural units are interconnected by bridging carboxylate oxygens to provide a compact supramolecular structure with a high density.
Sekaran Ganesan - One of the best experts on this subject based on the ideXlab platform.
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Immobilized cell reactors in mineralization of Dicarboxylic Acid solid waste
Biodegradation, 2006Co-Authors: Ganesh Kumar Arumugam, Swarnalatha Somasundaram, Victor Babu Kassey, Sekaran GanesanAbstract:Dicarboxylic Acid solid waste containing phthalic Acid, malic Acid, quinone, saturated and unsaturated Dicarboxylic esters etc., are discharged in huge quantities during the crackdown of benzene over the catalyst vanadium at temperatures greater than 500 °C in a Dicarboxylic Acid manufacturing industry. Concern over the biological effects of these compounds underlines the necessity to treat this solid waste. The role of yeast Saccharomyces cerevisiae and anaerobic mixed bacterial cultures immobilized in activated carbon, in sequential two stage anoxic reactors, were investigated for the degradation of Dicarboxylic Acid solid waste (DASW). In the first stage, DASW was dissolved in water to yield a concentration of 0.5% w/v and was treated in yeast Saccharomyces cerevisiae immobilized reactor at an optimum residence time of 24 h. The yeast fermented samples were further treated in an upflow anaerobic reactor containing mixed culture immobilized in activated carbon at an Hydraulic Retention Time (HRT) of 0.2076 days at an hydraulic flow rate of 14.6×10^−3 m^3/day and Chemical Oxygen Demand (COD) loading rate of 4.3 kg/m^3/day. The intermediates that were formed during the yeast fermentation and the anaerobic degradation of DASW were characterized by HPLC, proton NMR, C^13 NMR and mass spectrometry.
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Anaerobic Immobilized Yeast Cell Fermentation and Anaerobic Remediation in Hybrid Reactor for Mineralization of Dicarboxylic Acid Solid Waste
World Journal of Microbiology and Biotechnology, 2005Co-Authors: Ganesh Kumar Arumugam, Swarnalatha Somasundaram, Sekaran Ganesan, Prasad Rao BurusaAbstract:The solid resinous product (SRP) containing unsaturated/saturated Dicarboxylic Acid residues, phthalic Acid and maleic Acid is discharged as a solid waste during cracking of benzene over vanadium at temperatures above 500°C in the Dicarboxylic Acid manufacturing industry. In the present study the solid waste was diluted with water to a concentration of 0.5% w/v for microbial degradation. The waste was fermented in a reactor containing mesoporous activated carbon on which was immobilized Saccharomyces cerevisiae at an optimum residence time of 24 h at pH 6.5. The immobilized-yeast-treated samples were further treated in an upflow anaerobic reactor at an hydraulic retention time (HRT) of 0.1038 days at a hydraulic flow rate of 7.34 × 10^−3 m^3/day and chemical oxygen demand (COD) loading rate of 2.19 kg/m^3/day. The pathway followed in the degradation of Dicarboxylic Acid into end products by anaerobic metabolism in the yeast cell fermentor and in the upflow anaerobic reactor was confirmed through HPLC, Fourier transform infra red spectroscopy and proton and ^13C NMR spectroscopy.
Peter J. Rutledge - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and structural characterisation of amides from picolinic Acid and pyridine-2,6-Dicarboxylic Acid
Scientific Reports, 2015Co-Authors: Prarthana Devi, Sarah M. Barry, Kate M. Houlihan, Michael J. Murphy, Peter Turner, Paul Jensen, Peter J. RutledgeAbstract:Coupling picolinic Acid (pyridine-2-carboxylic Acid) and pyridine-2,6-Dicarboxylic Acid with N -alkylanilines affords a range of mono- and bis-amides in good to moderate yields. These amides are of interest for potential applications in catalysis, coordination chemistry and molecular devices. The reaction of picolinic Acid with thionyl chloride to generate the Acid chloride in situ leads not only to the N -alkyl- N -phenylpicolinamides as expected but also the corresponding 4-chloro- N -alkyl- N -phenylpicolinamides in the one pot. The two products are readily separated by column chromatography. Chlorinated products are not observed from the corresponding reactions of pyridine-2,6-Dicarboxylic Acid. X-Ray crystal structures for six of these compounds are described. These structures reveal a general preference for cis amide geometry in which the aromatic groups ( N -phenyl and pyridyl) are cis to each other and the pyridine nitrogen anti to the carbonyl oxygen. Variable temperature ^1H NMR experiments provide a window on amide bond isomerisation in solution.
Josef Hamacek - One of the best experts on this subject based on the ideXlab platform.
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Supramolecular structure of the polymeric Eu(III) complex with pyridine-2,6-Dicarboxylic Acid
Polyhedron, 2009Co-Authors: Josef Hamacek, Soumaila Zebret, Gérald BernardinelliAbstract:The europium complex with pyridine-2,6-Dicarboxylic Acid forms three-dimensional polymers in the solid state. The crystal structure of this assembly shows that europium cation is nine-coordinated and the first coordination sphere contains four water molecules. Mono(dipicolinate) structural units are interconnected by bridging carboxylate oxygens to provide a compact supramolecular structure with a high density.
Ganesh Kumar Arumugam - One of the best experts on this subject based on the ideXlab platform.
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Immobilized cell reactors in mineralization of Dicarboxylic Acid solid waste
Biodegradation, 2006Co-Authors: Ganesh Kumar Arumugam, Swarnalatha Somasundaram, Victor Babu Kassey, Sekaran GanesanAbstract:Dicarboxylic Acid solid waste containing phthalic Acid, malic Acid, quinone, saturated and unsaturated Dicarboxylic esters etc., are discharged in huge quantities during the crackdown of benzene over the catalyst vanadium at temperatures greater than 500 °C in a Dicarboxylic Acid manufacturing industry. Concern over the biological effects of these compounds underlines the necessity to treat this solid waste. The role of yeast Saccharomyces cerevisiae and anaerobic mixed bacterial cultures immobilized in activated carbon, in sequential two stage anoxic reactors, were investigated for the degradation of Dicarboxylic Acid solid waste (DASW). In the first stage, DASW was dissolved in water to yield a concentration of 0.5% w/v and was treated in yeast Saccharomyces cerevisiae immobilized reactor at an optimum residence time of 24 h. The yeast fermented samples were further treated in an upflow anaerobic reactor containing mixed culture immobilized in activated carbon at an Hydraulic Retention Time (HRT) of 0.2076 days at an hydraulic flow rate of 14.6×10^−3 m^3/day and Chemical Oxygen Demand (COD) loading rate of 4.3 kg/m^3/day. The intermediates that were formed during the yeast fermentation and the anaerobic degradation of DASW were characterized by HPLC, proton NMR, C^13 NMR and mass spectrometry.
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Anaerobic Immobilized Yeast Cell Fermentation and Anaerobic Remediation in Hybrid Reactor for Mineralization of Dicarboxylic Acid Solid Waste
World Journal of Microbiology and Biotechnology, 2005Co-Authors: Ganesh Kumar Arumugam, Swarnalatha Somasundaram, Sekaran Ganesan, Prasad Rao BurusaAbstract:The solid resinous product (SRP) containing unsaturated/saturated Dicarboxylic Acid residues, phthalic Acid and maleic Acid is discharged as a solid waste during cracking of benzene over vanadium at temperatures above 500°C in the Dicarboxylic Acid manufacturing industry. In the present study the solid waste was diluted with water to a concentration of 0.5% w/v for microbial degradation. The waste was fermented in a reactor containing mesoporous activated carbon on which was immobilized Saccharomyces cerevisiae at an optimum residence time of 24 h at pH 6.5. The immobilized-yeast-treated samples were further treated in an upflow anaerobic reactor at an hydraulic retention time (HRT) of 0.1038 days at a hydraulic flow rate of 7.34 × 10^−3 m^3/day and chemical oxygen demand (COD) loading rate of 2.19 kg/m^3/day. The pathway followed in the degradation of Dicarboxylic Acid into end products by anaerobic metabolism in the yeast cell fermentor and in the upflow anaerobic reactor was confirmed through HPLC, Fourier transform infra red spectroscopy and proton and ^13C NMR spectroscopy.