Urinary excretion and DNA binding of coal tar components in B6C3F1 mice following ingestion
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUrinary excretion and DNA binding of coal tar components in B6C3F1 mice following ingestionEric H. Weyand, Yun Wu, Shruti Patel, Barbara B. Taylor, and David M. MauroCite this: Chem. Res. Toxicol. 1991, 4, 4, 466–473Publication Date (Print):July 1, 1991Publication History Published online1 May 2002Published inissue 1 July 1991https://pubs.acs.org/doi/10.1021/tx00022a011https://doi.org/10.1021/tx00022a011research-articleACS PublicationsRequest reuse permissionsArticle Views98Altmetric-Citations34LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-AlertsKeywords:
tar (computing)
Coal tar
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The composition and content of heavy tar vary significantly depending on the pyrolysis conditions and separation methods. This study aimed to effectively identify the main components and content of heavy coal tar and provide a theoretical basis for its subsequent utilization. To achieve this, simulated distillation and infrared spectrum analysis of heavy coal tar were conducted with a focus on understanding the impact of simulated distillation on the composition and structure of tar. The results showed that the fraction content in the tar underwent significant changes after simulated distillation at different temperatures. Specifically, the content of light oil decreased from 4.3 to 0.1%, while the asphalt content increased from 77.6 to 90.6%. Infrared spectrum and peak fitting revealed that the distilled coal tars exhibited similar characteristic peaks in regions associated with hydroxyl, aliphatic hydrocarbon, oxygen-containing functional group, and aromatic hydrocarbon structure. Based on the infrared spectrum of heavy coal tar, principal component analysis was conducted on different fractions. When using two principal components, the cumulative value reached 96.93%. It was found that PC1 displayed strong peak signals around 749 and 687 cm–1, while PC2 exhibited strong peak signals near 2356 and 1143 cm–1.
tar (computing)
Coal tar
Fraction (chemistry)
Dry distillation
Destructive distillation
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Swimming pool water ingestion volumes are necessary for assessing infection risk from swimming. Pool water ingestion volumes can be estimated by questionnaire or measuring a chemical tracer in swimmer urine. Questionnaires are often preferred to the chemical tracer method because surveys are less time consuming, but no research exists validating questionnaires accurately quantify pool water ingestion volumes. The objective of this study was to explore if questionnaires are a reliable tool for collecting pool water ingestion volumes. A questionnaire was issued at four pool sites in Tucson, Arizona to 46 swimmers who also submitted a urine sample for analyzing cyanuric acid, a chemical tracer. Perceived ingestion volumes reported on the questionnaire were compared with pool water ingestion volumes, quantified by analyzing cyanuric acid in swimmer urine. Swimmers were asked if they swallowed (1) no water or only a few drops, (2) one to two mouthfuls, (3) three to five mouthfuls, or (4) six to eight mouthfuls. One mouthful is the equivalent of 27 mL of water. The majority (81%) of swimmers ingested <27 mL of pool water but reported ingesting >27 mL ("one mouthful") on the questionnaire. More than half (52%) of swimmers overestimated their ingestion volume. These findings suggest swimmers are over-estimating pool water ingestion because they perceive one mouthful is <27 mL. The questionnaire did not reliably collect pool water ingestion volumes and should be improved for future exposure assessment studies. Images of the ingestion volume categories should be included on the questionnaire to help swimmers visualize the response options.
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tar (computing)
Coal tar
Ultraviolet light
Ultraviolet
Ultraviolet irradiation
Ultraviolet therapy
Ultraviolet a
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Abstract A review of some aspects of coal tar chemistry is presented. Topics covered include: coal tar as a by-product of blast furnace coke production from hard coal; industrial uses of coal tar; chemical composition of coal tar (particularly with regard to polycyclic aromatic compounds PAC); preparation, purification and purity testing of PAC from coal tar; structure determination of unknown PAC derived from tar or by synthesis; high temperature chemistry of PAC in the gas and liquid phase. Key Words: coal tarcoke oven tarpolycyclic aromatic hydrocarbonsstructure determinationhigh temperature chemistry.
tar (computing)
Coal tar
Dry distillation
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Journal Article Standard Methods for Testing Tar and its Products P. V. Watkins (Secretary, Coal Tar Research Association), Ed. Published by the Standardization of Tar Products Tests Committee, Gomersal, Cleckheaton, Yorks, England, 1967. 6th Ed. 662 pp Get access Journal of Chromatographic Science, Volume 6, Issue 9, September 1968, Page 21A, https://doi.org/10.1093/chromsci/6.9.21A-b Published: 01 September 1968
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Coal tar
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This article reviews the present home and abroad development situation about coal tar, and finally sums up the development trends of coal tar in the future. The fractionation and extraction of different fractions in coal tar are important chemical materials for downstream products. Chemical-fuel and fuel type route were respectively used by high-temperature tar and low-temperature tar, which are optimal ways to achieve efficient utilization of coal tar.
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Coal tar
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