The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

Ashis K. Mukherjee - One of the best experts on this subject based on the ideXlab platform.

  • deep desulfurization of dibenzothiophene and its derivatives present in diesel oil by a newly isolated bacterium achromobacter sp to reduce the environmental pollution from Fossil Fuel Combustion
    Fuel Processing Technology, 2014
    Co-Authors: Naba K. Bordoloi, Mihir K. Chaudhuri, Ashis K. Mukherjee
    Abstract:

    Abstract Thiophenic compounds viz. dibenzothiophene (DBT) and its derivatives present in Fossil Fuels contribute significantly to air pollution. Here we report for the first time the efficacy of a strain of Achromobacter sp., isolated from a contaminated petroleum–oil soil sample, at efficiently cleaving carbon–sulfur (C–S) bonds in DBT under mesophilic growth conditions. This bacterium utilized DBT and its derivative viz. 4-methyl DBT as the sole source of sulfur and degraded them to 2-hydroxybiphenyl (2-HBP). The 2-HBP was finally converted to 2-methoxybiphenyl (2-MBP) by methylation at the hydroxyl group of 2-HBP suggesting that this bacterium followed sulfur-specific pathway (4S pathway) for deep-desulfurization. Further, 2-MBP is much less pollutant than DBT and therefore, it reduces the environmental pollution from Fossil Fuel Combustion. Gas chromatography and X-ray fluorescence analyses revealed that the resting cells of Achromobacter sp. reduced 7.1% of the total sulfur content of diesel oil, obtained typically by treating 5 mL of diesel oil with 14 g of dry cell, without compromising the quality of diesel oil. For the industrial application, DBT desulfurization was optimized by using response surface methodology. Our study demonstrates that Achromobacter sp. is a potential candidate for biodesulfurization of diesel oil with anticipated application as an eco-friendly biodesulfurizing agent.

  • Deep-desulfurization of dibenzothiophene and its derivatives present in diesel oil by a newly isolated bacterium Achromobacter sp. to reduce the environmental pollution from Fossil Fuel Combustion
    Fuel Processing Technology, 2014
    Co-Authors: Naba K. Bordoloi, Sudhir K. Rai, Mihir K. Chaudhuri, Ashis K. Mukherjee
    Abstract:

    Thiophenic compounds viz. dibenzothiophene (DBT) and its derivatives present in Fossil Fuels contribute significantly to air pollution. Here we report for the first time the efficacy of a strain of Achromobacter sp., isolated from a contaminated petroleum-oil soil sample, at efficiently cleaving carbon-sulfur (C-S) bonds in DBT under mesophilic growth conditions. This bacterium utilized DBT and its derivative viz. 4-methyl DBT as the sole source of sulfur and degraded them to 2-hydroxybiphenyl (2-HBP). The 2-HBP was finally converted to 2-methoxybiphenyl (2-MBP) by methylation at the hydroxyl group of 2-HBP suggesting that this bacterium followed sulfur-specific pathway (4S pathway) for deep-desulfurization. Further, 2-MBP is much less pollutant than DBT and therefore, it reduces the environmental pollution from Fossil Fuel Combustion. Gas chromatography and X-ray fluorescence analyses revealed that the resting cells of Achromobacter sp. reduced 7.1% of the total sulfur content of diesel oil, obtained typically by treating 5 mL of diesel oil with 14 g of dry cell, without compromising the quality of diesel oil. For the industrial application, DBT desulfurization was optimized by using response surface methodology. Our study demonstrates that Achromobacter sp. is a potential candidate for biodesulfurization of diesel oil with anticipated application as an eco-friendly biodesulfurizing agent. © 2013 Elsevier B.V.

Karlwerner Schramm - One of the best experts on this subject based on the ideXlab platform.

  • Inhibition of progesterone receptor activity in recombinant yeast by soot from Fossil Fuel Combustion emissions and air particulate materials.
    The Science of the total environment, 2005
    Co-Authors: Jingxian Wang, Antonius Kettrup, Karlwerner Schramm
    Abstract:

    Numerous environmental pollutants have been detected for estrogenic activity by interacting with the estrogen receptor, but little information is available about their interactions with the progesterone receptor. In this study, emission samples generated by Fossil Fuel Combustion (FFC) and air particulate material (APM) collected from an urban location near a traffic line in a big city of China were evaluated to interact with the human progesterone receptor (hPR) signaling pathway by examining their ability to interact with the activity of hPR expressed in yeast. The results showed that the soot of a petroleum-fired vehicle possessed the most potent anti-progesteronic activity, that of coal-fired stove and diesel fired agrimotor emissions took the second place, and soot samples of coal-fired heating work and electric power station had lesser progesterone inhibition activity. The anti-progesteronic activity of APM was between that of soot from petroleum-fired vehicle and soot from coal-fired establishments and diesel fired agrimotor. Since there was no other large pollution source near the APM sampling sites, the endocrine disrupters were most likely from vehicle emissions, tire attrition and house heating sources. The correlation analysis showed that a strong relationship existed between estrogenic activity and anti-progesteronic activity in emissions of Fossil Fuel Combustion. The discoveries that some environmental pollutants with estrogenic activity can also inhibit hPR activity indicate that further studies are required to investigate potential mechanisms for the reported estrogenic activities of these pollutants.

  • inhibition of progesterone receptor activity in recombinant yeast by soot from Fossil Fuel Combustion emissions and air particulate materials
    Science of The Total Environment, 2005
    Co-Authors: Jingxian Wang, A Kettrup, Karlwerner Schramm
    Abstract:

    Numerous environmental pollutants have been detected for estrogenic activity by interacting with the estrogen receptor, but little information is available about their interactions with the progesterone receptor. In this study, emission samples generated by Fossil Fuel Combustion (FFC) and air particulate material (APM) collected from an urban location near a traffic line in a big city of China were evaluated to interact with the human progesterone receptor (hPR) signaling pathway by examining their ability to interact with the activity of hPR expressed in yeast. The results showed that the soot of a petroleum-fired vehicle possessed the most potent anti-progesteronic activity, that of coal-fired stove and diesel fired agrimotor emissions took the second place, and soot samples of coal-fired heating work and electric power station had lesser progesterone inhibition activity. The anti-progesteronic activity of APM was between that of soot from petroleum-fired vehicle and soot from coal-fired establishments and diesel fired agrimotor. Since there was no other large pollution source near the APM sampling sites, the endocrine disrupters were most likely from vehicle emissions, tire attrition and house heating sources. The correlation analysis showed that a strong relationship existed between estrogenic activity and anti-progesteronic activity in emissions of Fossil Fuel Combustion. The discoveries that some environmental pollutants with estrogenic activity can also inhibit OR activity indicate that further studies are required to investigate potential mechanisms for the reported estrogenic activities of these pollutants. (c) 2005 Elsevier B.V. All rights reserved.

  • presence of estrogenic activity from emission of Fossil Fuel Combustion as detected by a recombinant yeast bioassay
    Atmospheric Environment, 2003
    Co-Authors: Jingxian Wang, Wenzhong Wu, Bernhard Henkelmann, A Kettrup, Karlwerner Schramm
    Abstract:

    Estrogenic activities of emission samples generated by Fossil Fuel Combustion were investigated with human estrogen receptor (ER) recombinant yeast bioassay. The results showed that there were weak but clear estrogenic activities in Combustion emissions of Fossil Fuels including coal, petroleum, and diesel. The estrogenic relative potency (RP) of Fossil Fuel Combustion was the highest in petroleum-fired car, followed by coal-fired stove, diesel-fired agrimotor, coal-fired electric power station. On the other hand, the estrogenic relative inductive efficiency (RIE) was the highest in coal-fired stove and coal-fired electric power station, followed by petroleum-fired car and diesel-fired agrimotor. The estrogenic activities in the sub-fractions from chromatographic separation of emitted materials were also determined. The results indicated that different chemical fractions in these complex systems have different estrogenic potencies. The GC/MS analysis of the emission showed that there were many aromatic carbonyls, big molecular alcohol, PAHs and derivatives, and substituted phenolic compounds and derivatives which have been reported as environmental estrogens. The existence of estrogenic substances in Fossil Fuel Combustion demands further investigation of their potential adverse effects on human and on the ecosystem. The magnitude of pollution due to global usage of Fossil Fuels makes it imperative to understand the issue of Fossil Fuel-derived endocrine activities and the associated health risks, particularly the aggregated risks stemmed from exposure to toxicants of multiple sources. (C) 2003 Elsevier Science Ltd. All rights reserved.

Mihir K. Chaudhuri - One of the best experts on this subject based on the ideXlab platform.

  • deep desulfurization of dibenzothiophene and its derivatives present in diesel oil by a newly isolated bacterium achromobacter sp to reduce the environmental pollution from Fossil Fuel Combustion
    Fuel Processing Technology, 2014
    Co-Authors: Naba K. Bordoloi, Mihir K. Chaudhuri, Ashis K. Mukherjee
    Abstract:

    Abstract Thiophenic compounds viz. dibenzothiophene (DBT) and its derivatives present in Fossil Fuels contribute significantly to air pollution. Here we report for the first time the efficacy of a strain of Achromobacter sp., isolated from a contaminated petroleum–oil soil sample, at efficiently cleaving carbon–sulfur (C–S) bonds in DBT under mesophilic growth conditions. This bacterium utilized DBT and its derivative viz. 4-methyl DBT as the sole source of sulfur and degraded them to 2-hydroxybiphenyl (2-HBP). The 2-HBP was finally converted to 2-methoxybiphenyl (2-MBP) by methylation at the hydroxyl group of 2-HBP suggesting that this bacterium followed sulfur-specific pathway (4S pathway) for deep-desulfurization. Further, 2-MBP is much less pollutant than DBT and therefore, it reduces the environmental pollution from Fossil Fuel Combustion. Gas chromatography and X-ray fluorescence analyses revealed that the resting cells of Achromobacter sp. reduced 7.1% of the total sulfur content of diesel oil, obtained typically by treating 5 mL of diesel oil with 14 g of dry cell, without compromising the quality of diesel oil. For the industrial application, DBT desulfurization was optimized by using response surface methodology. Our study demonstrates that Achromobacter sp. is a potential candidate for biodesulfurization of diesel oil with anticipated application as an eco-friendly biodesulfurizing agent.

  • Deep-desulfurization of dibenzothiophene and its derivatives present in diesel oil by a newly isolated bacterium Achromobacter sp. to reduce the environmental pollution from Fossil Fuel Combustion
    Fuel Processing Technology, 2014
    Co-Authors: Naba K. Bordoloi, Sudhir K. Rai, Mihir K. Chaudhuri, Ashis K. Mukherjee
    Abstract:

    Thiophenic compounds viz. dibenzothiophene (DBT) and its derivatives present in Fossil Fuels contribute significantly to air pollution. Here we report for the first time the efficacy of a strain of Achromobacter sp., isolated from a contaminated petroleum-oil soil sample, at efficiently cleaving carbon-sulfur (C-S) bonds in DBT under mesophilic growth conditions. This bacterium utilized DBT and its derivative viz. 4-methyl DBT as the sole source of sulfur and degraded them to 2-hydroxybiphenyl (2-HBP). The 2-HBP was finally converted to 2-methoxybiphenyl (2-MBP) by methylation at the hydroxyl group of 2-HBP suggesting that this bacterium followed sulfur-specific pathway (4S pathway) for deep-desulfurization. Further, 2-MBP is much less pollutant than DBT and therefore, it reduces the environmental pollution from Fossil Fuel Combustion. Gas chromatography and X-ray fluorescence analyses revealed that the resting cells of Achromobacter sp. reduced 7.1% of the total sulfur content of diesel oil, obtained typically by treating 5 mL of diesel oil with 14 g of dry cell, without compromising the quality of diesel oil. For the industrial application, DBT desulfurization was optimized by using response surface methodology. Our study demonstrates that Achromobacter sp. is a potential candidate for biodesulfurization of diesel oil with anticipated application as an eco-friendly biodesulfurizing agent. © 2013 Elsevier B.V.

Naba K. Bordoloi - One of the best experts on this subject based on the ideXlab platform.

  • deep desulfurization of dibenzothiophene and its derivatives present in diesel oil by a newly isolated bacterium achromobacter sp to reduce the environmental pollution from Fossil Fuel Combustion
    Fuel Processing Technology, 2014
    Co-Authors: Naba K. Bordoloi, Mihir K. Chaudhuri, Ashis K. Mukherjee
    Abstract:

    Abstract Thiophenic compounds viz. dibenzothiophene (DBT) and its derivatives present in Fossil Fuels contribute significantly to air pollution. Here we report for the first time the efficacy of a strain of Achromobacter sp., isolated from a contaminated petroleum–oil soil sample, at efficiently cleaving carbon–sulfur (C–S) bonds in DBT under mesophilic growth conditions. This bacterium utilized DBT and its derivative viz. 4-methyl DBT as the sole source of sulfur and degraded them to 2-hydroxybiphenyl (2-HBP). The 2-HBP was finally converted to 2-methoxybiphenyl (2-MBP) by methylation at the hydroxyl group of 2-HBP suggesting that this bacterium followed sulfur-specific pathway (4S pathway) for deep-desulfurization. Further, 2-MBP is much less pollutant than DBT and therefore, it reduces the environmental pollution from Fossil Fuel Combustion. Gas chromatography and X-ray fluorescence analyses revealed that the resting cells of Achromobacter sp. reduced 7.1% of the total sulfur content of diesel oil, obtained typically by treating 5 mL of diesel oil with 14 g of dry cell, without compromising the quality of diesel oil. For the industrial application, DBT desulfurization was optimized by using response surface methodology. Our study demonstrates that Achromobacter sp. is a potential candidate for biodesulfurization of diesel oil with anticipated application as an eco-friendly biodesulfurizing agent.

  • Deep-desulfurization of dibenzothiophene and its derivatives present in diesel oil by a newly isolated bacterium Achromobacter sp. to reduce the environmental pollution from Fossil Fuel Combustion
    Fuel Processing Technology, 2014
    Co-Authors: Naba K. Bordoloi, Sudhir K. Rai, Mihir K. Chaudhuri, Ashis K. Mukherjee
    Abstract:

    Thiophenic compounds viz. dibenzothiophene (DBT) and its derivatives present in Fossil Fuels contribute significantly to air pollution. Here we report for the first time the efficacy of a strain of Achromobacter sp., isolated from a contaminated petroleum-oil soil sample, at efficiently cleaving carbon-sulfur (C-S) bonds in DBT under mesophilic growth conditions. This bacterium utilized DBT and its derivative viz. 4-methyl DBT as the sole source of sulfur and degraded them to 2-hydroxybiphenyl (2-HBP). The 2-HBP was finally converted to 2-methoxybiphenyl (2-MBP) by methylation at the hydroxyl group of 2-HBP suggesting that this bacterium followed sulfur-specific pathway (4S pathway) for deep-desulfurization. Further, 2-MBP is much less pollutant than DBT and therefore, it reduces the environmental pollution from Fossil Fuel Combustion. Gas chromatography and X-ray fluorescence analyses revealed that the resting cells of Achromobacter sp. reduced 7.1% of the total sulfur content of diesel oil, obtained typically by treating 5 mL of diesel oil with 14 g of dry cell, without compromising the quality of diesel oil. For the industrial application, DBT desulfurization was optimized by using response surface methodology. Our study demonstrates that Achromobacter sp. is a potential candidate for biodesulfurization of diesel oil with anticipated application as an eco-friendly biodesulfurizing agent. © 2013 Elsevier B.V.

Jingxian Wang - One of the best experts on this subject based on the ideXlab platform.

  • Inhibition of progesterone receptor activity in recombinant yeast by soot from Fossil Fuel Combustion emissions and air particulate materials.
    The Science of the total environment, 2005
    Co-Authors: Jingxian Wang, Antonius Kettrup, Karlwerner Schramm
    Abstract:

    Numerous environmental pollutants have been detected for estrogenic activity by interacting with the estrogen receptor, but little information is available about their interactions with the progesterone receptor. In this study, emission samples generated by Fossil Fuel Combustion (FFC) and air particulate material (APM) collected from an urban location near a traffic line in a big city of China were evaluated to interact with the human progesterone receptor (hPR) signaling pathway by examining their ability to interact with the activity of hPR expressed in yeast. The results showed that the soot of a petroleum-fired vehicle possessed the most potent anti-progesteronic activity, that of coal-fired stove and diesel fired agrimotor emissions took the second place, and soot samples of coal-fired heating work and electric power station had lesser progesterone inhibition activity. The anti-progesteronic activity of APM was between that of soot from petroleum-fired vehicle and soot from coal-fired establishments and diesel fired agrimotor. Since there was no other large pollution source near the APM sampling sites, the endocrine disrupters were most likely from vehicle emissions, tire attrition and house heating sources. The correlation analysis showed that a strong relationship existed between estrogenic activity and anti-progesteronic activity in emissions of Fossil Fuel Combustion. The discoveries that some environmental pollutants with estrogenic activity can also inhibit hPR activity indicate that further studies are required to investigate potential mechanisms for the reported estrogenic activities of these pollutants.

  • inhibition of progesterone receptor activity in recombinant yeast by soot from Fossil Fuel Combustion emissions and air particulate materials
    Science of The Total Environment, 2005
    Co-Authors: Jingxian Wang, A Kettrup, Karlwerner Schramm
    Abstract:

    Numerous environmental pollutants have been detected for estrogenic activity by interacting with the estrogen receptor, but little information is available about their interactions with the progesterone receptor. In this study, emission samples generated by Fossil Fuel Combustion (FFC) and air particulate material (APM) collected from an urban location near a traffic line in a big city of China were evaluated to interact with the human progesterone receptor (hPR) signaling pathway by examining their ability to interact with the activity of hPR expressed in yeast. The results showed that the soot of a petroleum-fired vehicle possessed the most potent anti-progesteronic activity, that of coal-fired stove and diesel fired agrimotor emissions took the second place, and soot samples of coal-fired heating work and electric power station had lesser progesterone inhibition activity. The anti-progesteronic activity of APM was between that of soot from petroleum-fired vehicle and soot from coal-fired establishments and diesel fired agrimotor. Since there was no other large pollution source near the APM sampling sites, the endocrine disrupters were most likely from vehicle emissions, tire attrition and house heating sources. The correlation analysis showed that a strong relationship existed between estrogenic activity and anti-progesteronic activity in emissions of Fossil Fuel Combustion. The discoveries that some environmental pollutants with estrogenic activity can also inhibit OR activity indicate that further studies are required to investigate potential mechanisms for the reported estrogenic activities of these pollutants. (c) 2005 Elsevier B.V. All rights reserved.

  • presence of estrogenic activity from emission of Fossil Fuel Combustion as detected by a recombinant yeast bioassay
    Atmospheric Environment, 2003
    Co-Authors: Jingxian Wang, Wenzhong Wu, Bernhard Henkelmann, A Kettrup, Karlwerner Schramm
    Abstract:

    Estrogenic activities of emission samples generated by Fossil Fuel Combustion were investigated with human estrogen receptor (ER) recombinant yeast bioassay. The results showed that there were weak but clear estrogenic activities in Combustion emissions of Fossil Fuels including coal, petroleum, and diesel. The estrogenic relative potency (RP) of Fossil Fuel Combustion was the highest in petroleum-fired car, followed by coal-fired stove, diesel-fired agrimotor, coal-fired electric power station. On the other hand, the estrogenic relative inductive efficiency (RIE) was the highest in coal-fired stove and coal-fired electric power station, followed by petroleum-fired car and diesel-fired agrimotor. The estrogenic activities in the sub-fractions from chromatographic separation of emitted materials were also determined. The results indicated that different chemical fractions in these complex systems have different estrogenic potencies. The GC/MS analysis of the emission showed that there were many aromatic carbonyls, big molecular alcohol, PAHs and derivatives, and substituted phenolic compounds and derivatives which have been reported as environmental estrogens. The existence of estrogenic substances in Fossil Fuel Combustion demands further investigation of their potential adverse effects on human and on the ecosystem. The magnitude of pollution due to global usage of Fossil Fuels makes it imperative to understand the issue of Fossil Fuel-derived endocrine activities and the associated health risks, particularly the aggregated risks stemmed from exposure to toxicants of multiple sources. (C) 2003 Elsevier Science Ltd. All rights reserved.