Angela Lindner | University of Florida (original) (raw)

Papers by Angela Lindner

Research paper thumbnail of Transformation of ortho -substituted biphenyls by Methylosinus trichosporium OB3b: substituent effects on oxidation kinetics and product formation

Archives of Microbiology, 2000

Research paper thumbnail of Substituent effects on the oxidation of substituted biphenyl congeners by type II methanotroph strain CSC1

Archives of Microbiology, 2005

The oxidation potential of type II groundwater methanotroph, strain CSC1, expressing soluble meth... more The oxidation potential of type II groundwater methanotroph, strain CSC1, expressing soluble methane monooxygenase, was measured in the presence of 10 ortho-substituted biphenyls with varying electronics, sterics, and hydrophobicity character for comparison with type II Methylosinus trichosporium OB3b. Strain CSC1 showed faster rates with all compounds tested, with the exception of 2-nitrobiphenyl, 2-hydroxybiphenyl, and 2-aminobiphenyl. Products of oxidation observed upon incubation of strain CSC1 with biphenyl and 2-hydroxybiphenyl were hydroxylated biphenyls that revealed less preference for the para position and different dihydroxylation positions, respectively, in comparison to those observed with M. trichosporium OB3b. Only the intramolecular hydrogen migration, or NIH-shift, product was observed in the case of 2-chlorobiphenyl, whereas M. trichosporium OB3b yielded a variety of chlorohydroxybiphenyls. Quantitative structure–biodegradation relationships constructed with the maximum observed oxygen uptake rates as a dependent variable and a variety of descriptors showed an influence of substituent electronic character on the oxidation activity of strain CSC1. However, compound hydrophobicity and not compound size, as was observed with M. trichosporium OB3b, was shown to influence rates to a greater extent. This suggests that transport of the compound through the cell membrane and to the sMMO active site is rate-determining for strain CSC1.

Research paper thumbnail of QUANTITATIVE STRUCTURE–BIODEGRADATION RELATIONSHIPS FOR ORTHO-SUBSTITUTED BIPHENYL COMPOUNDS OXIDIZED BY METHYLOSINUS TRICHOSPORIUM OB3b

Environmental Toxicology and Chemistry, 2003

Research paper thumbnail of Isolation and characterization of a bacterium capable of removing taste- and odor-causing 2-methylisoborneol from water

Research paper thumbnail of Detecting Potential Pathogens on Hospital Surfaces: An Assessment of Carpet Tile Flooring in the Hospital Patient Environment

Indoor and Built Environment, 2010

Research paper thumbnail of Methanol removal efficiency and bacterial diversity of an activated carbon biofilter

Bioresource Technology, 2009

Research paper thumbnail of Methylocystis hirsuta sp. nov., a novel methanotroph isolated from a groundwater aquifer

International Journal of Systematic and Evolutionary Microbiology, 2007

Research paper thumbnail of Genetic Testing Prerequisites for Effective Tree-Based Phytoremediation Systems

Research paper thumbnail of Effects of Alpha Pinene and Trichloroethylene on Oxidation Potentials of Methanotrophic Bacteria

Bulletin of Environmental Contamination and Toxicology, 2005

... Toxicology Effects of Л/p/ia-Pinene and Trichloroethylene on Oxidation Potentials of Methanot... more ... Toxicology Effects of Л/p/ia-Pinene and Trichloroethylene on Oxidation Potentials of Methanotrophic Bacteria A. Pacheco, AS Lindner ... Culture Collection (ATCC) 33003) and Type II Methylosinus trichosporium OB3b (ATCC 35070), obtained from Dr. Jeremy Semrau (University ...

Research paper thumbnail of A Life-Cycle Comparison of Several Auxiliary Blowing Agents Used for the Manufacture of Rigid Polyurethane Foam

In a commitment to zero ozone depletion, the United Nations and the U.S. Environmental Protection... more In a commitment to zero ozone depletion, the United Nations and the U.S. Environmental Protection Agency (EPA) have called for the phase-out of the manufacture and import of hydrochlorofluorocarbons (HCFCs), used as auxiliary blowing agents (ABAs) in the manufacture of polyurethane foams. As a result, more environmentally benign alternative ABAs are being sought by the foam-blowing industry. This study examined the life cycle of HCFC-22, hydrofluorocarbon-134a (HFC-134a), and cyclopentane, which are currently used or considered as potential alternative ABAs in the manufacture of rigid polyurethane foams that serve as insulation in a model North American refrigerator. The raw material extraction/refining, manufacturing, use, and disposal stages of the life cycle of each ABA were considered, and their resulting relative impacts on ozone depletion and global warming were compared. The manufacturing, use, and disposal stages were determined to affect ozone depletion and global warming to the largest extent, emphasizing the need for a greater focus on pollution prevention opportunities in these stages. The HFC-134a life cycle yields no impact on ozone depletion and a significantly decreased global warming impact compared with its predecessor, HCFC-22, and a tradeoff of slightly higher global warming impact and fewer added safety concerns compared with its more flammable counterpart, cyclopentane.

Research paper thumbnail of Transformation of ortho -substituted biphenyls by Methylosinus trichosporium OB3b: substituent effects on oxidation kinetics and product formation

Archives of Microbiology, 2000

Research paper thumbnail of Substituent effects on the oxidation of substituted biphenyl congeners by type II methanotroph strain CSC1

Archives of Microbiology, 2005

The oxidation potential of type II groundwater methanotroph, strain CSC1, expressing soluble meth... more The oxidation potential of type II groundwater methanotroph, strain CSC1, expressing soluble methane monooxygenase, was measured in the presence of 10 ortho-substituted biphenyls with varying electronics, sterics, and hydrophobicity character for comparison with type II Methylosinus trichosporium OB3b. Strain CSC1 showed faster rates with all compounds tested, with the exception of 2-nitrobiphenyl, 2-hydroxybiphenyl, and 2-aminobiphenyl. Products of oxidation observed upon incubation of strain CSC1 with biphenyl and 2-hydroxybiphenyl were hydroxylated biphenyls that revealed less preference for the para position and different dihydroxylation positions, respectively, in comparison to those observed with M. trichosporium OB3b. Only the intramolecular hydrogen migration, or NIH-shift, product was observed in the case of 2-chlorobiphenyl, whereas M. trichosporium OB3b yielded a variety of chlorohydroxybiphenyls. Quantitative structure–biodegradation relationships constructed with the maximum observed oxygen uptake rates as a dependent variable and a variety of descriptors showed an influence of substituent electronic character on the oxidation activity of strain CSC1. However, compound hydrophobicity and not compound size, as was observed with M. trichosporium OB3b, was shown to influence rates to a greater extent. This suggests that transport of the compound through the cell membrane and to the sMMO active site is rate-determining for strain CSC1.

Research paper thumbnail of QUANTITATIVE STRUCTURE–BIODEGRADATION RELATIONSHIPS FOR ORTHO-SUBSTITUTED BIPHENYL COMPOUNDS OXIDIZED BY METHYLOSINUS TRICHOSPORIUM OB3b

Environmental Toxicology and Chemistry, 2003

Research paper thumbnail of Isolation and characterization of a bacterium capable of removing taste- and odor-causing 2-methylisoborneol from water

Research paper thumbnail of Detecting Potential Pathogens on Hospital Surfaces: An Assessment of Carpet Tile Flooring in the Hospital Patient Environment

Indoor and Built Environment, 2010

Research paper thumbnail of Methanol removal efficiency and bacterial diversity of an activated carbon biofilter

Bioresource Technology, 2009

Research paper thumbnail of Methylocystis hirsuta sp. nov., a novel methanotroph isolated from a groundwater aquifer

International Journal of Systematic and Evolutionary Microbiology, 2007

Research paper thumbnail of Genetic Testing Prerequisites for Effective Tree-Based Phytoremediation Systems

Research paper thumbnail of Effects of Alpha Pinene and Trichloroethylene on Oxidation Potentials of Methanotrophic Bacteria

Bulletin of Environmental Contamination and Toxicology, 2005

... Toxicology Effects of Л/p/ia-Pinene and Trichloroethylene on Oxidation Potentials of Methanot... more ... Toxicology Effects of Л/p/ia-Pinene and Trichloroethylene on Oxidation Potentials of Methanotrophic Bacteria A. Pacheco, AS Lindner ... Culture Collection (ATCC) 33003) and Type II Methylosinus trichosporium OB3b (ATCC 35070), obtained from Dr. Jeremy Semrau (University ...

Research paper thumbnail of A Life-Cycle Comparison of Several Auxiliary Blowing Agents Used for the Manufacture of Rigid Polyurethane Foam

In a commitment to zero ozone depletion, the United Nations and the U.S. Environmental Protection... more In a commitment to zero ozone depletion, the United Nations and the U.S. Environmental Protection Agency (EPA) have called for the phase-out of the manufacture and import of hydrochlorofluorocarbons (HCFCs), used as auxiliary blowing agents (ABAs) in the manufacture of polyurethane foams. As a result, more environmentally benign alternative ABAs are being sought by the foam-blowing industry. This study examined the life cycle of HCFC-22, hydrofluorocarbon-134a (HFC-134a), and cyclopentane, which are currently used or considered as potential alternative ABAs in the manufacture of rigid polyurethane foams that serve as insulation in a model North American refrigerator. The raw material extraction/refining, manufacturing, use, and disposal stages of the life cycle of each ABA were considered, and their resulting relative impacts on ozone depletion and global warming were compared. The manufacturing, use, and disposal stages were determined to affect ozone depletion and global warming to the largest extent, emphasizing the need for a greater focus on pollution prevention opportunities in these stages. The HFC-134a life cycle yields no impact on ozone depletion and a significantly decreased global warming impact compared with its predecessor, HCFC-22, and a tradeoff of slightly higher global warming impact and fewer added safety concerns compared with its more flammable counterpart, cyclopentane.