Relevant bibliographies by topics / Aliphatic and aromatic hydrocarbons

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Academic literature on the topic 'Aliphatic and aromatic hydrocarbons'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Aliphatic and aromatic hydrocarbons"

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Doley, Ruby, and Manoj Barthakur. "Biotransformation of aromatic hydrocarbon: Naphthalene to Aliphatic Hydrocarbons through Staphylococcus pasteuri RD2." Annals of Plant Sciences 7, no. 5 (April 30, 2018): 2247. http://dx.doi.org/10.21746/aps.2018.7.5.7.

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Aromatic hydrocarbons like naphthalene are common environmental pollutants of petrochemical waste. Microorganisms have been exploited since long back to clean up such pollutants by converting them in to either non- toxic or less toxic aromatic or aliphatic compounds. A bacterial strain have been isolated from oil sludge of Guwahati Refinery, Assam and was identified as Staphylococcus pasteuri RD2 (NCBI accession number MG680735) through 16srDNA sequence analysis and molecular phylogeny. The bacterial strain transforms Naphthalene, a common hazardous aromatic hydrocarbon found in petrochemical waste, into a number of less hazardous aliphatic hydrocarbons. Detection of compounds such as Decane, Dodecane, tetradecane, Hexadecane, Eicosane, and heptane by GC-MS analysis of naphthalene enrichment culture broth suggested that the bacterial strain was able to transform naphthalene in to different aliphatic hydrocarbons with less toxicity and having chain length of C7 to C20. It has also been depicted a pathway to obtain aliphatic hydrocarbons with higher caloric value from aromatic hydrocarbon waste.
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Díaz-Ramírez, I. J., H. Ramírez-Saad, M. Gutiérrez-Rojas, and E. Favela-Torres. "Biodegradation of Maya crude oil fractions by bacterial strains and a defined mixed culture isolated from Cyperus laxus rhizosphere soil in a contaminated site." Canadian Journal of Microbiology 49, no. 12 (December 1, 2003): 755–61. http://dx.doi.org/10.1139/w03-098.

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Ten bacterial strains were isolated by enrichment culture, using as carbon sources either aliphatics or an aromatic–polar mixture. Oxygen uptake rate was used as a criterion to determine culture transfer timing at each enrichment stage. Biodegradation of aliphatics (10 000 mg L–1) and an aromatic–polar mixture (5000 mg L–1, 2:1) was evaluated for each of the bacterial strains and for a defined culture made up with a standardized mixture of the isolated strains. Degradation of total hydrocarbons (10 000 mg L–1) was also determined for the defined mixed culture. Five bacterial strains were able to degrade more than 50% of the aliphatic fraction. The most extensive biodegradation (74%) was obtained with strain Bs 9A, while strains Ps 2AP and UAM 10AP were able to degrade up to 15% of the aromatic–polar mixture. The defined mixed culture degraded 47% of the aliphatics and 6% of the aromatic–polar mixture. The defined mixed culture was able to degrade about 40% of the aliphatic fraction and 26% of the aromatic fraction when grown in the presence of total hydrocarbons, while these microorganisms did not consume the polar hydrocarbons fraction. The proposed strategy that combines enrichment culture together with oxygen uptake rate allowed the isolation of bacterial strains that are able to degrade specific hydrocarbons fractions at high consumption rates.Key words: biodegradation, defined mixed culture, enrichment culture, hydrocarbon fractions, oxygen uptake.
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Sloan, G. C. "Spitzer spectroscopy of unusual hydrocarbons in cool radiative environments." Proceedings of the International Astronomical Union 4, S251 (February 2008): 191–94. http://dx.doi.org/10.1017/s1743921308021534.

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AbstractThe Spitzer Space Telescope has discovered several objects with unusual spectra, where the emission features from polycyclic aromatic hydrocarbons (PAHs) are shifted to longer wavelengths than normally observed. Previously, only two of these class C PAH spectra had been identified. The new and larger sample reveals that PAHs emit at longer wavelengths when processed by cooler radiation fields. Limited laboratory data show that samples with mixtures of aromatic and aliphatic hydrocarbons produce emission features at longer wavelengths than purely aromatic samples. The aliphatic bonds are more fragile and would only survive in cooler radiation fields. In harsher radiation fields, the aliphatics attached to the aromatic hydrocarbons are destroyed.
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April, T. M., J. M. Foght, and R. S. Currah. "Hydrocarbon-degrading filamentous fungi isolated from flare pit soils in northern and western Canada." Canadian Journal of Microbiology 46, no. 1 (December 17, 1999): 38–49. http://dx.doi.org/10.1139/w99-117.

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Sixty-four species of filamentous fungi from five flare pits in northern and western Canada were tested for their ability to degrade crude oil using gas chromatographic analysis of residual hydrocarbons following incubation. Nine isolates were tested further using radiorespirometry to determine the extent of mineralization of model radiolabelled aliphatic and aromatic hydrocarbons dissolved in crude oil. Hydrocarbon biodegradation capability was observed in species representing six orders of the Ascomycota. Gas chromatography indicated that species capable of hydrocarbon degradation attacked compounds within the aliphatic fraction of crude oil, n-C12- n-C26; degradation of compounds within the aromatic fraction was not observed. Radiorespirometry, using n-[1-14C]hexadecane and [9-14C]phenanthrene, confirmed the gas chromatographic results and verified that aliphatic compounds were being mineralized, not simply transformed to intermediate metabolites. This study shows that filamentous fungi may play an integral role in the in situ biodegradation of aliphatic pollutants in flare pit soils.Key words: bioremediation, filamentous fungi, flare pits, hydrocarbon degradation, petroleum.
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Feitkenhauer, H., and H. Märkl. "Biodegradation of aliphatic and aromatic hydrocarbons at high temperatures." Water Science and Technology 47, no. 10 (May 1, 2003): 123–30. http://dx.doi.org/10.2166/wst.2003.0555.

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In this paper, the high temperature (65-75°C) biodegradation of aliphatic and aromatic hydrocarbons is investigated and kinetic parameters are derived. The shift of the physico-chemical system properties with rising temperature will be discussed in detail. For example, the solubility of naphthalene is increased by a factor of about ten if the temperature is increased from 20 to 75°C. This effect is essential to increase the bioavailability of sparingly soluble hydrocarbons. It is also demonstrated in experiments that very high oxygen transfer rates can be obtained at high temperatures in the presence of hydrocarbons. It is shown that efficient phenol biodegradation is essential for high temperature hydrocarbon degradation because some microorganisms tend to transform phenols into polyphenols which are very inhibitory for microbial growth. A defined mixed culture adapted to phenol converted more than 90% of a mixture of phenol, hexadecane and pyrene and a very high maximal growth rate of 0.19 h−1 was determined. A yield coefficient YX/S of about 0.8 g (biomass)/g (hydrocarbons) was calculated in this experiment. In a separate experiment the influence of the hydrocarbon droplet size on the biodegradation is investigated at 70°C using a newly isolated Thermus sp. In this case, the growth on a hexadecane/pyrene mixture was described by a model based on the Monod equation and the corresponding kinetic parameters are derived. A mixed culture was used for the bioremediation of soil in a slurry reactor. The initial contamination of 11 g/kg was lowered to about 2 g in a reactor inoculated by an immobilized culture of extreme thermophilic microorganisms, while 9 g/kg remained in a sterile control.
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Parinos, C., A. Gogou, I. Bouloubassi, R. Pedrosa-Pàmies, I. Hatzianestis, A. Sanchez-Vidal, G. Rousakis, D. Velaoras, G. Krokos, and V. Lykousis. "Occurrence, sources and transport pathways of natural and anthropogenic hydrocarbons in deep-sea sediments of the eastern Mediterranean Sea." Biogeosciences 10, no. 9 (September 24, 2013): 6069–89. http://dx.doi.org/10.5194/bg-10-6069-2013.

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Abstract. Surface sediments collected from deep basins (1018–4087 m depth) of the eastern Mediterranean Sea (Ionian Sea, southern Aegean Sea and northwestern Levantine Sea) were analyzed for aliphatic and polycyclic aromatic hydrocarbons as tracers of natural and anthropogenic inputs. Concentrations of total aliphatic hydrocarbons, n-alkanes and the unresolved complex mixture (UCM) of aliphatic hydrocarbons varied significantly, ranging from 1.34 to 49.2 μg g−1, 145 to 4810 ng g−1 and 0.73 to 36.7 μg g−1, respectively, while concentrations of total polycyclic aromatic hydrocarbons (PAHs) ranged between 11.6 and 223 ng g−1. Molecular profiles of determined hydrocarbons reflect a mixed contribution from both natural and anthropogenic sources in deep-sea sediments of the eastern Mediterranean Sea, i.e., terrestrial plant waxes, degraded petroleum products, unburned fossil fuels and combustion of grass, wood and coal. Hydrocarbon mixtures display significant variability amongst sub-regions, reflecting differences in the relative importance of inputs from various sources and phase associations/transport pathways of individual hydrocarbons that impact on their overall distribution and fate. Hydrocarbon concentrations correlated significantly with the organic carbon content of sediments, indicating that the latter exerts an important control on their transport and ultimate accumulation in deep basins. Additionally, water masses' circulation characteristics also seem to influence the regional features and distribution patterns of hydrocarbons. Our findings highlight the role of deep basins/canyons as repositories of both natural and anthropogenic chemical species.
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Schuhmann, M., K. Altwegg, H. Balsiger, J. J. Berthelier, J. De Keyser, B. Fiethe, S. A. Fuselier, et al. "Aliphatic and aromatic hydrocarbons in comet 67P/Churyumov-Gerasimenko seen by ROSINA." Astronomy & Astrophysics 630 (September 20, 2019): A31. http://dx.doi.org/10.1051/0004-6361/201834666.

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Context. Unlike all previous cometary space missions, the Rosetta spacecraft accompanied its target, comet 67P/Churyumov-Gerasimenko, for more than two years on its way around the Sun. Thereby, an unexpected diversity and complexity of the chemical composition was revealed. Aims. Our first step of decrypting the exact chemical composition of the gaseous phase is the identifying and quantifying the bulk composition of the pure aromatic and aliphatic hydrocarbons. Methods. For this study, data from ROSINA–Double Focusing Mass Spectrometer (DFMS) onboard the Rosetta spacecraft and the laboratory twin model were used. A joint campaign of laboratory calibration measurements and space data analysis was performed to derive the hydrocarbon bulk composition for the post-inbound equinox period at 1.52 AU in May 2015. Furthermore, several other mission phases were investigated to determine the dependencies of season, location, and heliocentric distance on the relative abundances of hydrocarbons. Results. It is shown that the bulk composition of the gaseous phase includes a high number of aliphatic compounds such as methane, ethane, and propane, as well as the aromatic compounds benzene and toluene. Butane and pentane were successfully identified in measurements at closer distance to the comet in May 2016. Furthermore, the presence of hexane and heptane in the coma is confirmed on rare occasions during the mission. Their presence in DFMS space data appears to be linked to days or periods of high dust activity. In addition to the saturated aliphatic and aromatic compounds, a high number of remaining unsaturated species is present, which cannot be explained by fragmentation of saturated species or contribution from other organic molecules in addition to pure hydrocarbons. This indicates the existence of unsaturated aliphatic and aromatic hydrocarbon molecules in the coma of comet 67P.
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Asaftei, Iuliean V., Ion Sandu, Nicolae Bilba, Neculai Catalin Lungu, Maria Ignat, and Elvira Mahu. "Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material." Revista de Chimie 71, no. 2 (March 3, 2020): 403–12. http://dx.doi.org/10.37358/rc.20.2.7943.

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The conversion of light hydrocarbons resulted as by-product of petroleum refining (mixtures of (n + i) butanes, 52.28 � 63.20 vol.%, (1-, cis-, trans-, 2-) butenes, 28.64 � 36.43 vol.% and propane � propylene, 4.79 � 14.64 vol.%) over bifunctional 5% ZnO/HZSM-5 co-catalyst in a fixed-bed stainless-steel reactor (Twin Reactor System Naky) at 450�C, 4 atm. total pressure and at a space velocity (WHSV) of 1 h-1 have been investigated. The results indicate that the selectivity to light aromatics � benzene, toluene and xylenes (BTX) � and to both the gaseous C1, C2 - C4 hydrocarbons and liquid (i + n) C5 � C10 aliphatic hydrocarbons depends on the time on stream of the process. This is a result of coke deposition (polyunsaturated compounds) and catalyst deactivation. The aromatics BTX represent 59-60 wt% in the liquid product during the first 24-36 hours time-on-stream and only 20-30 wt% after 40 hours of reaction when the aliphatic hydrocarbon C5 � C10 (mostly iso) and ]C10 (denoted �oligo�) reach to 70 � 80 wt%. The aromatic products were principally toluene, xylenes and benzene, theirs concentration varying with the time on stream of the process. The initial aromatization process described as dehydrocyclodimerization of alkanes and alkenes, principally to aromatics BTX and molecular hydrogen is accompanied by an oligomerization, isomerisation, cracking and alkylation process to form finally in the liquid product an excessively mixture of iso- and normal- C5 � C10 aliphatic hydrocarbons and ] C10.
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Firrincieli, Andrea, Andrea Negroni, Giulio Zanaroli, and Martina Cappelletti. "Unraveling the Metabolic Potential of Asgardarchaeota in a Sediment from the Mediterranean Hydrocarbon-Contaminated Water Basin Mar Piccolo (Taranto, Italy)." Microorganisms 9, no. 4 (April 16, 2021): 859. http://dx.doi.org/10.3390/microorganisms9040859.

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Increasing number of metagenome sequencing studies have proposed a central metabolic role of still understudied Archaeal members in natural and artificial ecosystems. However, their role in hydrocarbon cycling, particularly in the anaerobic biodegradation of aliphatic and aromatic hydrocarbons, is still mostly unknown in both marine and terrestrial environments. In this work, we focused our study on the metagenomic characterization of the archaeal community inhabiting the Mar Piccolo (Taranto, Italy, central Mediterranean) sediments heavily contaminated by petroleum hydrocarbons and polychlorinated biphenyls (PCB). Among metagenomic bins reconstructed from Mar Piccolo microbial community, we have identified members of the Asgardarchaeota superphylum that has been recently proposed to play a central role in hydrocarbon cycling in natural ecosystems under anoxic conditions. In particular, we found members affiliated with Thorarchaeota, Heimdallarchaeota, and Lokiarchaeota phyla and analyzed their genomic potential involved in central metabolism and hydrocarbon biodegradation. Metabolic prediction based on metagenomic analysis identified the malonyl-CoA and benzoyl-CoA routes as the pathways involved in aliphatic and aromatic biodegradation in these Asgardarchaeota members. This is the first study to give insight into the archaeal community functionality and connection to hydrocarbon degradation in marine sediment historically contaminated by hydrocarbons.
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Parinos, C., A. Gogou, I. Bouloubassi, R. Pedrosa-Pàmies, I. Hatzianestis, A. Sànchez-Vidal, G. Rousakis, D. Velaoras, G. Krokos, and V. Lykousis. "Occurrence, sources and transport pathways of natural and anthropogenic hydrocarbons in deep-sea sediments of the Eastern Mediterranean Sea." Biogeosciences Discussions 9, no. 12 (December 13, 2012): 17999–8038. http://dx.doi.org/10.5194/bgd-9-17999-2012.

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Abstract. Surface sediments collected from deep basins (22 stations, 1018–4087 m depth) of the Eastern Mediterranean Sea (EMS) were analyzed for aliphatic, triterpenoid and polycyclic aromatic hydrocarbons (PAHs) as tracers of natural and anthropogenic inputs. Concentrations of total aliphatic hydrocarbons (TAHC), n-alkanes (NA) and the Unresolved Complex Mixture (UCM) of aliphatic hydrocarbons ranged from 1.34 to 49.2 µg g−1, 145 to 4810 ng g−1 and 0.73 to 36.7 µg g−1, respectively, while total PAHs (TPAH25) concentrations ranged from 11.6 to 223 ng g−1. Molecular profiles of aliphatic hydrocarbons and PAHs reflect the contribution of both natural (epicuticular plant waxes) and anthropogenic (degraded petroleum products, unburned fossil fuels and combustion of petroleum, grass, wood and coal) compounds in deep EMS sediments, with hydrocarbon mixtures displaying significant regional variability. Hydrocarbon concentrations correlated significantly with the Total Organic Carbon (TOC) content of sediments, indicating that organic carbon exerts an important control on their transport and fate in the study area, while strong sub-basin and mesoscale variability of water masses also impact their regional characteristics. Major findings of this study support that deep basins/canyons of the EMS could act as traps of both natural and anthropogenic hydrocarbons.
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Dissertations / Theses on the topic "Aliphatic and aromatic hydrocarbons"

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Stoecker, Matthew A. "Biodegradation of aromatic and aliphatic hydrocarbons by Rhodococcus spp. /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/11495.

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Kondaveeti, Rajiv. "Impact of Halogenated Aliphatic and Aromatic Additives on Soot and Polycyclic Aromatic Hydrocarbons -- An Ethylene-air Laminar Co-flow Diffusion Flame Study." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1343786258.

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Becker, Jonathan [Verfasser]. "Synthetic and kinetic investigations on selective oxidation of aromatic and aliphatic hydrocarbons with copper complexes / Jonathan Becker." Gießen : Universitätsbibliothek, 2015. http://d-nb.info/1073119173/34.

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Magoha, Happy Steven. "Destruction of polycyclic aromatic hydrocarbons (PAH's) and aliphatic hydrocarbons in soil using ball milling thesis submitted in (partial) fulfilment of the Master of Applied Science, Auckland University of Technology, May 2004." Full thesis. Abstract, 2004. http://puka2.aut.ac.nz/ait/theses/MagohaH.pdf.

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Tanwar, Shivalika. "Investigation of encapsulation of Aromatic polluants by β-Cyclodextrin in presence of linear aliphatic alcohols." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCD076.

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La pollution de l’environnement par les composés organiques est devenue une préoccupation mondiale majeure. Les molécules aromatiques comme les cycles benzéniques et leurs dérivés ont attiré une attention considérable en raison de la toxicité reconnue et de la cancérogénicité. Principalement utilisées en chimie supramoléculaire,les cyclodextrines sont des structures moléculaires en forme de cône tronqué ayant une surface externe hydrophile et une cavité hydrophobe. Ainsi, ils peuvent théoriquement encapsuler un grand nombre de molécules organiques hydrophobes pour former des complexes d'inclusion solubles dans l'eau. Cette propriété de complexation a une application potentielle dans le domaine de la détection et de la quantification des polluants polycycliques aromatiques dans les eaux environnementales par des moyens spectroscopiques portables. Nous souhaitons comprendre ce phénomène d’inclusion en combinant des approches théoriques et expérimentales appliquées à l’état solide et en solution. Il a été observé que seules quelques structures cristallines de complexes de cyclodextrines, molécules aromatiques pures, apparaissent dans les bases de données structurelles après un court examen. L'objectif principal de nos recherches est donc de nous concentrer plus précisément sur les interactions entre les alcools aliphatiques et les molécules de cyclodextrine. Pour cela,afin de corréler nos études expérimentales et théoriques, les résultats obtenus ont été suivis de manière systématique par différentes techniques spectroscopiques afin d'observer l'interaction entre les molécules. De plus, les poudres et les cristaux obtenus en faisant varier la solubilité des mélanges ont été soumis à une analyse physico-chimique, à une diffraction des rayons X et à une surveillance DSC pour étayer nos résultats. Ce travail comprend également la modélisation de complexes d'inclusion en utilisant différentes approches, comme la combinaison de méthodes semi-empiriques de la chimie quantique (DFT / TD-DFT) et de la mécanique moléculaire polarisable. Des calculs ont été effectués sur des clusters internes, ce qui permettra de mettre en évidence des facteurs structurels et énergétiques de complexation
Environmental water pollution by organic compound has become a major worldwide concern. Aromatic molecules like benzene rings and their derivatives have gained considerable attention due to officially documented toxicity and carcinogenicity. Mostly used in supramolecular chemistry, Cyclodextrins are truncated cone-shaped molecular structures having a hydrophilic outer surface and a hydrophobic cavity. Thus, they can theoretically encapsulate a large number of hydrophobic organic molecules to form water-soluble inclusion complexes. This complexation property has potential application in the field of detection and quantification of aromatic polycyclic pollutants in environmental water by portable spectroscopic means. We are interested in understanding this phenomenon of inclusion by combining theoretical and experimental approaches applied to solid state and in solution. It has been observed that only a few crystalline structures of cyclodextrin- pure aromatic molecule complexes appear in the structural databases after a brief review. Therefore, the main objective of our research is to focus more precisely on the interactions between the aliphatic alcohols and cyclodextrin molecules. For this purpose, to correlate our experimental and theoretical studies, the results obtained were monitored by various spectroscopic techniques in a systematic manner to observe the interaction between the molecules. Moreover, the powders and crystals obtained by varying the solubility of the mixtures were further subjected to physico-chemical analysis, X-ray diffraction, and DSC monitoring to support our findings. This work also includes modeling of inclusion complexes using different approaches like combining semi-empirical methods of quantum chemistry (DFT / TD-DFT) and polarizable molecular mechanics. Calculations were carried out on homemade clusters, which will allow the implementation of evidence of structural and energetic factors for complexation
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Deshmukh, Ashish Pramod. "Sorption and sequestration of phenanthrene In polymethylenic plant biopolymers: proxies for soil and sedimentary rrganic matter." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1054564060.

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Lopes, Alcinei Pereira. "Estudo de hidrocarbonetos e metais em sedimentos de fundo do Rio Negro na orla urbana de Manaus." Universidade Federal do Amazonas, 2010. http://tede.ufam.edu.br/handle/tede/3329.

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Made available in DSpace on 2015-04-22T22:02:04Z (GMT). No. of bitstreams: 1 Dissertacao Alcinei Pereira Lopes.pdf: 3280697 bytes, checksum: 535d2d7812f1764295a9b8c14b85a386 (MD5) Previous issue date: 2010-09-23
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The waters of the Rio Negro, in the border city of Manaus, receives large amounts of domestic and industrial waste from its main tributaries (Tarumã-Acu, Sao Raimundo, Pupils and Puraquequara) that may be compromising their natural features (water, plants, sediments and etc.). Due the ability to accumulate organic and inorganic compounds, the bottom sediments are used to assess the contamination levels of aquatic environments. As a result, we determined the concentrations of aliphatic hydrocarbons, polycyclic aromatic hydrocarbons (PAH) and potentially toxic metals (MPT) in ten samples of bottom sediments collected in March 2009 in the confluence between the Rio Negro and major watersheds the city of Manaus. The aim of study was to classify the origin and level of contamination of these compounds. In the determination of hydrocarbons, sediments were freeze dried, extracted with hexane, fractionated by open column liquid chromatography. The determination of aliphatic hydrocarbons was performed by GC-FID and the PAH by GC-MS. After digestion with aqua regia the MPT (Al, Fe, Zn, Cu, Ni, Cr, Pb, Cd and Mn) in total fraction of sediments were determined by ICP-OES. The results showed that concentrations of total aliphatic hydrocarbons were 13.4 to 448 mg g-1, and the sum of 38 PAHs was 58.8 to 6832 ng g-1. These values are considered high for natural aquatic environments that have not suffered oil spill accidents. Among the metals determined Al (32 091 mg kg-1) and Fe (35 474 mg kg-1) were those with the highest concentrations.The sediments that received the largest anthropogenic contribution were those collected at the entrance of the basin of the streams São Raimundo and Educandos. The diagnosis index hydrocarbons the origin of in sediments showed a predominance of mixed sources and petrogenic sources in most seasons
As águas do rio Negro na orla urbana de Manaus recebem grande quantidade de resíduos domésticos e industriais de seus principais afluentes (Tarumã-Açu, São Raimundo, Educandos e Puraquequara) que podem estar comprometendo suas características naturais (água, plantas, sedimentos e etc). Por ter a capacidade de acumular compostos orgânicos e inorgânicos, os sedimentos de fundo são utilizados na avaliação dos níveis de contaminação de ambientes aquáticos. Em virtude disso, foram determinados as concentrações de hidrocarbonetos alifáticos, hidrocarbonetos policíclicos aromáticos (HPA) e metais em dez amostras de sedimentos de fundo, coletadas em março de 2009 nas confluências entre o rio Negro e as principais bacias de drenagem da cidade de Manaus. O estudo tem o objetivo de classificar a origem e o nível de contaminação destes compostos. Nas determinações de hidrocarbonetos, os sedimentos foram liofilizados, extraídos em soxhlet, fracionados por cromatografia líquida de coluna aberta. A determinação de hidrocarbonetos alifáticos foi realizada por CG-DIC e os HPA por CG-EM. Apos digestão com água régia, os metais (Al, Fe, Zn, Cu, Ni, Cr, Pb, V, Cd e Mn) presentes na fração total dos sedimentos foram determinados por ICP-OES. Os resultados mostraram que as concentrações dos hidrocarbonetos alifáticos totais foram de 13,4 a 448 μg g-1, e a somatória dos 38 HPA foi de 58,8 a 6832 ng g-1. Esses valores são considerados elevados para ambientes aquáticos naturais que não sofreram acidentes de derrame de óleo. Entre os metais determinados o Al (32091 mg kg-1) e o Fe (35474 mg kg-1) foram os que apresentaram as maiores concentrações. Os sedimentos que receberam a maior contribuição antrópica foram daqueles coletados na entrada da bacia dos igarapés São Raimundo e Educando. Os índices de diagnósticos da origem de ix hidrocarbonetos nos sedimentos mostraram predominância de fontes petrogênica e fontes mistas na maioria das estações.
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Gualandi, Giovanni <1973&gt. "Chlorinated aliphatic and aromatic hydrocarbons biodegradation: bioaugmentation tests in slurry microcosmos and study of the catabolic potential of microbial community in the interface between groundwater and surface water." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/382/.

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CRAVEIRO, Nykon. "Hidrocarbonetos no sedimento superficial do sistema estuarino do Rio Formoso, nordeste do Brasil." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18335.

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A contaminação por hidrocarbonetos (HCs) do petróleo em regiões costeiras marinhas, como os estuários, é considerada uma das mais importantes e impactantes, devido aos danos que esses elementos podem ocasionar aos organismos e ao homem. O objetivo do presente estudo foi investigas, pela primeira vez, os hidrocarbonetos nos sedimentos superficiais do sistema estuarino do Rio Formoso (SERF), litoral Sul do estado de Pernambuco – Brasil. Os compostos de hidrocarbonetos alifáticos (HAs) foram determinados em cromatógrafo a gás (GC) Agilent Tecnologies 7820A, acoplado a um detector de ionização de chamas (DIC) e os compostos de hidrocarbonetos policíclicos aromáticos (HPAs) foram determinados no mesmo cromatógrafo, porém acoplado a um espectrômetro de massas 5975 (MS) em modo de monitoramento de íons selecionados (SIM). A concentração de alifáticos totais (∑Alif) nos sedimentos do SERF variou entre 1,37 e 126,64 μg g-1 peso seco (ps), com as concentrações de n-alcanos totais (Σn-Alc) entre 0,51 e 27,5 μg g-1 ps, oriundos principalmente de fontes biogênicas, como vegetais superiores. A concentração de HPAs (Σ16HPAs) variou entre 3,80 e 500,3 ng g-1 ps, provenientes de fontes petrogências e pirogênicas As concentrações de hidrocarbonetos alifáticos e aromáticos detectados nos sedimentos do sistema estuarino do Rio Formoso foram consideradas baixas, quando comparadas com outras áreas estudadas ao redor do mundo e aos índices propostos por estudos e agências reguladoras nacionais e internacionais, sugerindo um ambiente com pouco impacto sobre a biota. Contudo, a presença de compostos como HPAs é um indicativo de ação antrópica sobre o sistema, sendo importante a implantação e manutenção de um programa de monitoramento na área, quanto aos hidrocarbonetos, para avaliar os possíveis impactos que a presença desses compostos possam ocasionar sobre o SERF e garantir a conservação continuada de um estuário de tamanha importância ecológica, econômica e social.
The contamination by hydrocarbons (HCs) of oil in marine coastal regions, such as estuaries, is considered one of the most important and impactful due to the damage that these elements may cause to the bodies and man. The aim of this study was investigas for the first time, the hydrocarbons in the surface sediments of the estuarine system of the Formoso river (SERF), South coast of the state of Pernambuco - Brazil. Aliphatic hydrocarbon compounds (HAs) were determined on a gas chromatograph (GC) Agilent Technologies 7820A coupled to a flame ionization detector (FID) and polycyclic aromatic hydrocarbon compounds (PAH) were determined in the same chromatograph, however coupled a mass spectrometer 5975 (MS) in selected ion monitoring mode (SIM). The concentration of total aliphatic (ΣAlif) in SERF sediments ranged between 1.37 and 126.64 μg g-1 dry weight (dw), with total n-alkanes concentrations (Σn-Alc) between 0.51 and 27.5 μg g-1 dw, mainly from biogenic sources such as higher plants. The concentration of PAHs (Σ16HPAs) ranged from 3.80 to 500.3 ng g-1 dw, from petrogências sources and pyrogenic Hydrocarbon concentrations aliphatic and aromatic detected in the sediments of the estuarine system of the Formoso river were considered low compared with other areas studied around the world and the indices proposed by studies and national and international regulatory agencies, suggesting an environment with little impact on the biota. However, the presence of compounds such as PAHs is indicative of human action on the system, it is important to establishing and maintaining a monitoring program in the area, as hydrocarbons, to assess the possible impact that the presence of these compounds can cause on SERF and ensure the continued conservation of an estuary of such ecological, economic and social.
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Tian, Zhenjiao. "Oxidation and Reduction Process for Polycyclic Aromatic Hydrocarbons and Nitrated Polycyclic Aromatic Hydrocarbons." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1228333650.

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Books on the topic "Aliphatic and aromatic hydrocarbons"

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Oakley, Karen L. Aliphatic and polycyclic aromatic hydrocarbons in eggs, livers, and stomach contents of black-legged kittiwakes in Prince William Sound, Alaska, after the Exxon Valdez oil spill. [Anchorage, Alaska: U.S. Fish and Wildlife Service, 1996.

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Oakley, Karen L. Aliphatic and polycyclic aromatic hydrocarbons in eggs, livers, and stomach contents of black-legged kittiwakes in Prince William Sound, Alaska, after the Exxon Valdez oil spill. [Anchorage, Alaska: U.S. Fish and Wildlife Service, 1996.

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Oakley, Karen L. Aliphatic and polycyclic aromatic hydrocarbons in eggs, livers, and stomach contents of black-legged kittiwakes in Prince William Sound, Alaska, after the Exxon Valdez oil spill. [Anchorage, Alaska: U.S. Fish and Wildlife Service, 1996.

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Harvey, Ronald G. Polycyclic aromatic hydrocarbons. New York: Wiley-VCH, 1997.

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Hayakawa, Kazuichi, ed. Polycyclic Aromatic Hydrocarbons. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-6775-4.

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Shen, Huizhong. Polycyclic Aromatic Hydrocarbons. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49680-0.

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Polycyclic aromatic hydrocarbons. New York: Wiley-VCH, 1997.

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Marsh, K. N., ed. Densities of Aliphatic Hydrocarbons _ Alkanes. Berlin/Heidelberg: Springer-Verlag, 1996. http://dx.doi.org/10.1007/b58738.

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Hall, K. R., and K. N. Marsh, eds. Densities of Aromatic Hydrocarbons. Berlin/Heidelberg: Springer-Verlag, 1998. http://dx.doi.org/10.1007/b62075.

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NATO Advanced Research and CNRS Workshop on Polycyclic Aromatic Hydrocarbons and Astrophysics (1986 Les Houches, Hauto-Savoie, France). Polycyclic aromatic hydrocarbons and astrophysics. Dordrecht: D. Reidel Pub. Co., 1987.

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Book chapters on the topic "Aliphatic and aromatic hydrocarbons"

1

Meindersma, G. Wytze, and A. B. de Haan. "Separation of Aromatic and Aliphatic Hydrocarbons with Ionic Liquids:." In ACS Symposium Series, 255–72. Washington DC: American Chemical Society, 2009. http://dx.doi.org/10.1021/bk-2009-1030.ch018.

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Vandersall, Mark T., Stephen G. Maroldo, William H. Brendley, Krzysztof Jurczyk, and Russell S. Drago. "Low-Temperature Deep Oxidation of Aliphatic and Aromatic Hydrocarbons." In Environmental Catalysis, 331–39. Washington, DC: American Chemical Society, 1994. http://dx.doi.org/10.1021/bk-1994-0552.ch027.

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Mehboob, F., S. Weelink, F. T. Saia, H. Junca, A. J. M. Stams, and G. Schraa. "Microbial Degradation of Aliphatic and Aromatic Hydrocarbons with (Per)Chlorate as Electron Acceptor." In Handbook of Hydrocarbon and Lipid Microbiology, 935–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-77587-4_66.

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Imanaka, Tadayuki, and Masaaki Morikawa. "Isolation of a New Mixotrophic Bacterium Which can Fix CO2 and Assimilate Aliphatic and Aromatic Hydrocarbons Anaerobically." In Environmental Biotechnology, 16–27. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-017-1435-8_2.

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Agafonov, G. L., I. V. Bilera, Y. A. Kolbanovsky, V. N. Smirnov, A. M. Tereza, and P. A. Vlasov. "Soot Formation During Pyrolysis and Oxidation of Aliphatic and Aromatic Hydrocarbons in Shock Waves: Experiments and Detailed Kinetic Modeling." In 30th International Symposium on Shock Waves 1, 321–25. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-46213-4_54.

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Mohd Tahir, Norhayati, Tan Hock Seng, Muhammad Fais Fadzil, Suhaimi Suratman, and Marinah Ariffin. "A Baseline Assesment on the Distributions and Sources of Aliphatic and Polycyclic Aromatic Hydrocarbons in Abiotic Environment of Terengganu National Park." In Greater Kenyir Landscapes, 41–51. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92264-5_4.

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Rekker, R. F., and G. de Vries. "A basic confrontation of Rekker’s revised ∑f-system with HPLC retention data obtained on a mixed series of aliphatic and aromatic hydrocarbons." In Trends in QSAR and Molecular Modelling 92, 132–36. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1472-1_20.

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Junca, Howard. "Introduction to Primer-Based Detection of Microbial Genes, Particularly Those Encoding Enzymes for Aromatic/Aliphatic Hydrocarbon Biodegradation." In Springer Protocols Handbooks, 1–7. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/8623_2016_201.

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Amosu, Mayowa, Nicole Nation, and Mary Alice Smith. "Aliphatic Hydrocarbons." In Hamilton & Hardy's Industrial Toxicology, 401–18. Hoboken, New Jersey: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118834015.ch53.

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Small, Donald M. "Aliphatic Hydrocarbons." In The Physical Chemistry of Lipids, 183–232. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-5333-9_7.

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Conference papers on the topic "Aliphatic and aromatic hydrocarbons"

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Oberhuettinger, C., A. Langmeier, H. Oberpriller, M. Kessler, J. Goebel, and G. Mueller. "O3.2 - Detection of Aromatic/Aliphatic Hydrocarbons and Amines by Laser-Ion Mobility Spectrometry (LIMS)." In SENSOR+TEST Conferences 2009. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2009. http://dx.doi.org/10.5162/opto09/o3.2.

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Lei, Hanwu, Shoujie Ren, James Julson, Lu Wang, Quan Bu, and Roger Ruan. "Microwave Torrefaction of Corn Stover and Tech-Economic Analysis." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50230.

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Microwave torrefaction of corn stover with particle size of 4 mm was investigated and the effects of reaction temperature and time on the yields of volatile, bio-oil and torrefied biomass were determined. The response surface analysis of the central composite design (CCD) showed that the yields of volatile, bio-oil and torrefied biomass were significantly affected by the reaction temperature and time. Three linear models were developed to predict the yields of conversion products as a function of temperature and time. A first order reaction kinetics was also developed to model the corn stover torrefaction. Ph values of torrefaction bio-oils ranged from 2.3 to 2.76 which were similar to those of bio-oils from biomass pyrolysis. GC/MS analysis for torrefaction bio-oils showed that the organic acid was about 2.16% to 12.00%. The torrefaction bio-oils also contain valuable chemical compounds such as phenols, furan derivatives and aliphatic hydrocarbons determined by a GC/MS. There are no aromatic compounds and polycyclic aromatic hydrocarbons (PAHs) detected in the torrefaction bio-oils. The torrefaction biogas was mainly consisted of ch4, c2h6, c3h8, which was about 56 wt% of the total bio-gas. The biogas can be used for chemical synthesis or electricity generation. The heating values of torrefied biomass were from 18.64–22.22 MJ/kg depending on the process conditions. The heating values of torrefied biomass were significantly greater than those of raw biomass and similar to those of coals. The energy yields of torrefied biomass from 87.03–97.87% implied that most energy was retained in the torrefied biomass. Economic analysis indicated that the biomass microwave torrefaction plant located in a farm is profitable.
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Berné, O., C. Joblin, G. Mulas, A. G. G. M. Tielens, and J. R. Goicoechea. "Polycyclic Aromatic Hydrocarbons with SPICA." In SPICA joint European/Japanese Workshop. Les Ulis, France: EDP Sciences, 2009. http://dx.doi.org/10.1051/spica/200903005.

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Hu, Lucy, Adriane Miller, Chang Park, Kristin Plichta, Stephanie Rochford, Meghan Schulz, Sha Yang, and Robert Orwoll. "Aliphatic/Aromatic Hybrid Polymers for Functionally Graded Radiation Shielding." In Space 2004 Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-6030.

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Wong, Wallace W. H. "Polycyclic aromatic hydrocarbons for organic photovoltaics." In Asia Communications and Photonics Conference and Exhibition. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/acp.2011.83120j.

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Wong, Wallace W. "Polycyclic aromatic hydrocarbons for organic photovoltaics." In SPIE/OSA/IEEE Asia Communications and Photonics, edited by Min Gu. SPIE, 2011. http://dx.doi.org/10.1117/12.902704.

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Cabaleiro-Lago, Enrique M., Jorge A. Carrazana-García, Ivan Gonzalez-Veloso, and Jesús Rodríguez-Otero. "Computational study of stacked complexes of aliphatic and aromatic species." In The 23rd International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2019. http://dx.doi.org/10.3390/ecsoc-23-06603.

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Steber, Amanda, Melanie Schnell, Daniël Rap, and Cristobal Perez. "MOLECULAR HYDROGEN COMPLEXATION WITH POLYCYCLIC AROMATIC HYDROCARBONS." In 2020 International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2020. http://dx.doi.org/10.15278/isms.2020.wj06.

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Ahsan, A., and D. A. Karlsen. "Biodegradation of Aromatic Hydrocarbons in Petroleum Reservoirs." In 60th EAGE Conference and Exhibition. European Association of Geoscientists & Engineers, 1998. http://dx.doi.org/10.3997/2214-4609.201408551.

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Kania, S., J. Kondrasiuk, and Grzegorz W. Bak. "Electron drift mobility in some aromatic hydrocarbons." In XII Conference on Solid State Crystals: Materials Science and Applications, edited by Antoni Rogalski, Jaroslaw Rutkowski, Andrzej Majchrowski, and Jerzy Zielinski. SPIE, 1997. http://dx.doi.org/10.1117/12.276224.

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Reports on the topic "Aliphatic and aromatic hydrocarbons"

1

Scott, L. T. High temperature chemistry of aromatic hydrocarbons. Office of Scientific and Technical Information (OSTI), December 1991. http://dx.doi.org/10.2172/10110066.

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Allison, Thomas C., and Donald R. Burgess Jr. Thermodynamic Properties of Polycyclic Aromatic Hydrocarbons. National Institute of Standards and Technology, December 2015. http://dx.doi.org/10.6028/nist.sp.1186.

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Scott, L. T. High temperature chemistry of aromatic hydrocarbons. Office of Scientific and Technical Information (OSTI), January 1991. http://dx.doi.org/10.2172/5900415.

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Scott, L. (High temperature chemistry of aromatic hydrocarbons). Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/5417776.

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Sygula, Andrzej. Polynuclear Aromatic Hydrocarbons with Curved Surfaces: Buckyballs. Office of Scientific and Technical Information (OSTI), August 2016. http://dx.doi.org/10.2172/1335963.

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Weiss, S. The molecular biology of environmental aromatic hydrocarbons. Office of Scientific and Technical Information (OSTI), December 1989. http://dx.doi.org/10.2172/6984813.

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Alexander E. Karu Ph.D, Victoria A. Roberts Ph.D., and Ph D. Qing X. Li. Engineered Antibodies for Monitoring of Polynuclear Aromatic Hydrocarbons. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/791423.

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Karu, A. E., V. A. Roberts, and Q. X. Li. Engineered antibodies for monitoring of polynuclear aromatic hydrocarbons. Office of Scientific and Technical Information (OSTI), June 1998. http://dx.doi.org/10.2172/13577.

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Huncik, Kevin M., John Kucklick, and Jared M. Ragland. Polycyclic aromatic hydrocarbons (PAHs) in marine mammal blubber:. Gaithersburg, MD: National Institute of Standards and Technology, March 2019. http://dx.doi.org/10.6028/nist.ir.8233.

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Keeley, D. F., and J. R. Meriwether. Aromatic hydrocarbons associated with brines from geopressured wells. Office of Scientific and Technical Information (OSTI), January 1991. http://dx.doi.org/10.2172/5743180.

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