Relevant bibliographies by topics / 4-amino-2-nitrotoluene

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Academic literature on the topic '4-amino-2-nitrotoluene'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "4-amino-2-nitrotoluene"

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Houpt, John T., Glenn J. Leach, Larry R. Williams, Mark S. Johnson, and Gunda Reddy. "Toxicity Assessment of 4-Amino-2-Nitrotoluene." International Journal of Toxicology 32, no. 2 (2013): 113–22. http://dx.doi.org/10.1177/1091581813480408.

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4-Amino-2-nitrotoluene (4A2NT; CAS 119-32-4) is a degradation product of 2,4-dinitrotoluene. The toxicity data on 4A2NT are limited. Therefore, we collected toxicity data from rats to assess environmental and human health effects from exposures. The approximate lethal dose for both sexes was 5000 mg/kg. A 14-day toxicity study in rats was conducted with 4A2NT in the feed at concentrations of 0, 125, 250, 500, 1000, and 2000 ppm. Based on a 14-day oral dose range toxicity study with 4A2NT in the feed, 2000 ppm was selected as highest concentration for a subsequent 90-day study. An oral 90-day s
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2

Spiess, Tilmann, Frank Desiere, Peter Fischer, Jim C. Spain, Hans-Joachim Knackmuss, and Hiltrud Lenke. "A New 4-Nitrotoluene Degradation Pathway in aMycobacterium Strain." Applied and Environmental Microbiology 64, no. 2 (1998): 446–52. http://dx.doi.org/10.1128/aem.64.2.446-452.1998.

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ABSTRACT Mycobacterium sp. strain HL 4-NT-1, isolated from a mixed soil sample from the Stuttgart area, utilized 4-nitrotoluene as the sole source of nitrogen, carbon, and energy. Under aerobic conditions, resting cells of the Mycobacterium strain metabolized 4-nitrotoluene with concomitant release of small amounts of ammonia; under anaerobic conditions, 4-nitrotoluene was completely converted to 6-amino-m-cresol. 4-Hydroxylaminotoluene was converted to 6-amino-m-cresol by cell extracts and thus could be confirmed as the initial metabolite in the degradative pathway. This enzymatic equivalent
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Mahan, Kristina M., Joseph T. Penrod, Kou-San Ju, et al. "Selection for Growth on 3-Nitrotoluene by 2-Nitrotoluene-Utilizing Acidovorax sp. Strain JS42 Identifies Nitroarene Dioxygenases with Altered Specificities." Applied and Environmental Microbiology 81, no. 1 (2014): 309–19. http://dx.doi.org/10.1128/aem.02772-14.

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ABSTRACTAcidovoraxsp. strain JS42 uses 2-nitrotoluene as a sole source of carbon and energy. The first enzyme of the degradation pathway, 2-nitrotoluene 2,3-dioxygenase, adds both atoms of molecular oxygen to 2-nitrotoluene, forming nitrite and 3-methylcatechol. All three mononitrotoluene isomers serve as substrates for 2-nitrotoluene dioxygenase, but strain JS42 is unable to grow on 3- or 4-nitrotoluene. Using both long- and short-term selections, we obtained spontaneous mutants of strain JS42 that grew on 3-nitrotoluene. All of the strains obtained by short-term selection had mutations in th
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Cheng, Jiayang, Makram T. Suidan, and Albert D. Venosa. "Kinetics of anaerobic cometabolism of 2,4-dinitrotoluene with ethanol as the primary substrate." Water Science and Technology 36, no. 6-7 (1997): 271–78. http://dx.doi.org/10.2166/wst.1997.0600.

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A kinetic model that describes the anaerobic cometabolism of 2,4-dinitrtoluene (DNT) with ethanol as the primary substrate has been developed based on experimental results. The kinetic parameters were estimated using the Levenberg-Marquardt algorithm. 2,4-DNT is anaerobically biotransformed to 2,4-diaminotoluene (DAT) via 4-amino-2-nitrotoluene (4-A-2-NT) and 2-amino-4-nitrotoluene (2-A-4-NT) by the bacteria whose growth is supported by utilizing ethanol. 2,4-DNT shows inhibition to its own biotransformation. It also exhibits a very strong competitive inhibition to further biotransformation of
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Kadiyala, Venkateswarlu, Lloyd J. Nadeau, and Jim C. Spain. "Construction of Escherichia coli Strains for Conversion of Nitroacetophenones to ortho-Aminophenols." Applied and Environmental Microbiology 69, no. 11 (2003): 6520–26. http://dx.doi.org/10.1128/aem.69.11.6520-6526.2003.

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ABSTRACT The predominant bacterial pathway for nitrobenzene (NB) degradation uses an NB nitroreductase and hydroxylaminobenzene (HAB) mutase to form the ring-fission substrate ortho-aminophenol. We tested the hypothesis that constructed strains might accumulate the aminophenols from nitroacetophenones and other nitroaromatic compounds. We constructed a recombinant plasmid carrying NB nitroreductase (nbzA) and HAB mutase A (habA) genes, both from Pseudomonas pseudoalcaligenes JS45, and expressed the enzymes in Escherichia coli JS995. IPTG (isopropyl-β-d-thiogalactopyranoside)-induced cells of s
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Wang, Jing, Guang Fei Liu, Hong Lu, Ji Ti Zhou, and Lihua Li. "Enhanced Biotransformation of Dinitrotoluene by Mediator-Functionalized Polypyrrole Composites." Advanced Materials Research 610-613 (December 2012): 129–32. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.129.

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The continuous dosing and discharge of water soluble redox mediators such as biologically recalcitrant compounds will result in the secondary contamination. The immobilized redox mediator prepared by incorporation of anthraquinonedisulphon-ate (AQDS) during the electropolymerization of pyrrole monomer on active carbon felt (ACF), AQDS/PPy/ACF, was used for catalyzing bioreduction of 2,4-dinitrotoluene(2,4-DNT) in this study. The results showed that the morphology of the PPy films deposits on ACF are characterized by some globular structure; AQDS/PPy/ACF exhibited good catalytic activity and st
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7

Hawari, Jalal, Annamaria Halasz, Sylvie Beaudet, Louise Paquet, Guy Ampleman, and Sonia Thiboutot. "Biotransformation of 2,4,6-Trinitrotoluene withPhanerochaete chrysosporium in Agitated Cultures at pH 4.5." Applied and Environmental Microbiology 65, no. 7 (1999): 2977–86. http://dx.doi.org/10.1128/aem.65.7.2977-2986.1999.

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ABSTRACT The biotransformation of 2,4,6-trinitrotoluene (TNT) (175 μM) byPhanerochaete chrysosporium with molasses and citric acid at pH 4.5 was studied. In less than 2 weeks, TNT disappeared completely, but mineralization (liberated14CO2) did not exceed 1%. A time study revealed the presence of several intermediates, marked by the initial formation of two monohydroxylaminodinitrotoluenes (2- and 4-HADNT) followed by their successive transformation to several other products, including monoaminodinitrotoluenes (ADNT). A group of nine acylated intermediates were also detected. They included 2-N-
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Jiayang, Cheng, Makram T. Suidan, and Albert D. Venosa. "Abiotic reduction of 2,4-dinitrotoluene in the presence of sulfide minerals under anoxic conditions." Water Science and Technology 34, no. 10 (1996): 25–33. http://dx.doi.org/10.2166/wst.1996.0235.

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Abiotic reduction of 2,4-dinitrotoluene (DNT) in the presence of sulfide minerals has been investigated under anoxic conditions at 35°C. 2,4-DNT was abiotically reduced to 4-amino-2-nitrotoluene (4-A-2-NT) and 2-amino-4-nitrotoluene (2-A-4-NT) in the presence of high concentration of sulfide (0.84 mM). No abiotic reduction of 2,4-DNT was observed in the presence of low sulfide concentration (0.42 mM). The rate and the extent of the abiotic reduction of 2,4-DNT were increased with an increase in sulfide concentration. Sulfide served as an electron donor for the reduction of 2,4-DNT. The 2-nitro
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Alvarez, Marc A., Christopher L. Kitts, Pat J. Unkefer, and James L. Botsford. "Pseudomonas aeruginosastrain MA01 aerobically metabolizes the aminodinitrotoluenes produced by 2,4,6-trinitrotoluene nitro group reduction." Canadian Journal of Microbiology 41, no. 11 (1995): 984–91. http://dx.doi.org/10.1139/m95-137.

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Many microbes reduce the nitro substituents of 2,4,6-trinitrotoluene (TNT), producing aminodinitrotoluenes (ADNTs). These compounds are recalcitrant to further breakdown and are acutely toxic. In a search for organisms capable of metabolizing ADNTs, a bacterial strain was isolated for the ability to use 2-aminobenzoate (anthranilate) as sole C-source. This isolate, Pseudomonas aeruginosa MA01, metabolized TNT by first reducing one nitro group to form either 2-amino-4,6-dinitrotoluene (2ADNT) or 4-amino-2,6-dinitrotoluene (4ADNT). However, strain MA01 was distinct from other TNT-reducing organi
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He, Zhongqi, and Jim C. Spain. "Reactions Involved in the Lower Pathway for Degradation of 4-Nitrotoluene by Mycobacterium Strain HL 4-NT-1." Applied and Environmental Microbiology 66, no. 7 (2000): 3010–15. http://dx.doi.org/10.1128/aem.66.7.3010-3015.2000.

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ABSTRACT In spite of the variety of initial reactions, the aerobic biodegradation of aromatic compounds generally yields dihydroxy intermediates for ring cleavage. Recent investigation of the degradation of nitroaromatic compounds revealed that some nitroaromatic compounds are initially converted to 2-aminophenol rather than dihydroxy intermediates by a number of microorganisms. The complete pathway for the metabolism of 2-aminophenol during the degradation of nitrobenzene by Pseudomonas pseudoalcaligenes JS45 has been elucidated previously. The pathway is parallel to the catechol extradiol ri
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Dissertations / Theses on the topic "4-amino-2-nitrotoluene"

1

Christopher, Heidi Jandell. "Biodegradation of 2,4-Dinitrotoluene in the Waste Streams of a Munitions Plant." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/31106.

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Wastewater from the manufacture of propellants typically contains 2,4-dinitrotoluene (DNT), a suspected animal carcinogen. Previous studies have indicated that DNT is aerobically biodegradable. However, inconsistent removal of DNT during aerobic treatment has been observed at a munitions wastewater treatment plant, necessitating the use of activated carbon pre-treatment. The objective of this study was to evaluate the effect of nutrient and cosubstrate amendments on the rate and extent of DNT removal. Addition of ethanol (100-500 mg/l) and phosphate (0.8-3.3 mg/l) significantly accelerated
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Reports on the topic "4-amino-2-nitrotoluene"

1

Houpt, John T. Toxicological Study No. 75-55-YJ81-91, 4-Amino 2 Nitrotoluene (42ANT) Summary of Mutagenicity Studies, Avian Toxicity Studies and Aquatic Studies. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada639937.

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Houpt, John T. Toxicological Study No. 75-55-YJ81-91, 4-Amino 2 Nitrotoluene (42ANT) Summary of Mutagenicity Studies, Avian Toxiciity Studies and Acquatic Toxicity Studies. Defense Technical Information Center, 1994. http://dx.doi.org/10.21236/ada562932.

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Houpt, John T., and Glenn J. Leach. 4-Amino 2-Nitrotoluene (4A2NT) Oral Approximate Lethal Dose 14-day Range Finding 90-day Subchronic Feeding Studies in Rats, August 1991-November 1993. Defense Technical Information Center, 1994. http://dx.doi.org/10.21236/ada639936.

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Houpt, John T., and Glenn J. Leach. Toxicological Study No. 75-51-YJ81-93, 4-Amino-2-Nitrotoluene (4A2NT) Oral Approximate Lethal Dose 14-day Range Finding 90-Day Subchronic Feeding Studies in Rats, August 1991-November 1993. Defense Technical Information Center, 1994. http://dx.doi.org/10.21236/ada562931.

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