Topic
Aromatic hydrocarbon
About: Aromatic hydrocarbon is a research topic. Over the lifetime, 5814 publications have been published within this topic receiving 55499 citations. The topic is also known as: arene & arenes.
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Patent•
17 Nov 1999
TL;DR: In this paper, the problem of obtaining a compound having excellent apo AI expression accelerating actions and useful as a medicine is addressed. But, the problem is not solved in this paper.
Abstract: PROBLEM TO BE SOLVED: To obtain a compound having excellent apo AI expression accelerating actions and useful as a medicine. SOLUTION: This apo AI expression accelerator comprises a compound represented by the formula (I) (wherein the ring A and Ar1 are each a monocyclic or a bicyclic aromatic hydrocarbon cyclic group or an aromatic heterocyclic group or the like which may respectively have a substituent group; R is hydrogen or the like; Z is oxygen or the like; Y1 and Y2 are each hydrogen, a lower alkyl or the like; (n) is an integer of 0-2; the broken line indicates the presence or absence of a bond; and the wavy line indicates the cis- or trans- geometrical isomerism related to the double bond), its prodrug, a phemaceutically acceptable salt thereof and a hydrate thereof.
30 citations
Patent•
11 Feb 2000
TL;DR: In this paper, the authors presented a process for producing process oil having a content of a polycyclic aromatic compound of less than 3% by weight, which includes extracting mixed oil made of 20 to 90% of residual oil and 10 to 80% by volume of lubricant base oil with a polar solvent.
Abstract: Process oil which satisfies requirements that a content of a polycyclic aromatic compound is less than 3% by weight, a content of an aromatic hydrocarbon is 18% by weight or more, a content of a polar compound is between 11 and 25% by weight, a kinematic viscosity at 100°C is between 10 and 70 mm2/s, and a flash point is 210°C or more; a process for producing process oil having a content of a polycyclic aromatic compound of less than 3% by weight, which includes extracting mixed oil made of 20 to 90% by volume of residual oil and 10 to 80% by volume of lubricant base oil with a polar solvent; rubber process oil in which a content of a polycyclic aromatic compound is less than 3% by weight, a content of an aromatic hydrocarbon according to ASTM D 2007 is between 25 and 35% by weight, a content of a polar compound according to ASTM D 2007 is between 15 and 20% by weight, a kinematic viscosity at 100°C is in the range of 20 to 32 mm2/s, a flash point (CCC) is 230°C or more, and a 5 volume % distillation temperature is between 370 and 530°C; and a rubber composition obtained by blending a rubber with 10 to 25% by weight, based on the total amount of the rubber composition, of the process oil. The process oil of the present invention has the content of the polycyclic aromatic compound of less than 3% by weight and maintains properties of ordinary process oil. The rubber process oil of the present invention has the content of the polycyclic aromatic compound of less than 3% by weight and maintains the properties of ordinary oil; the rubber process oil has the content of the polycyclic aromatic compound of less than 3% by weight, maintains the viscosity of ordinary oil and is excellent in the compatibility with an aromatic rubber; and the rubber composition containing the same is free from bleeding, and excellent in the heat aging properties.
30 citations
TL;DR: It appears that MOs used in printing inks are potential endocrine disruptors and should be assessed carefully to what extent they might contribute to the total estrogenic burden in humans.
Abstract: The majority of printing inks are based on mineral oils (MOs) which contain complex mixtures of saturated and aromatic hydrocarbons. Consumer exposure to these oils occurs either through direct skin contacts or, more frequently, as a result of MO migration into the contents of food packaging that was made from recycled newspaper. Despite this ubiquitous and frequent exposure little is known about the potential toxicological effects, particularly with regard to the aromatic MO fractions. From a toxicological point of view the huge amount of alkylated and unsubstituted compounds therein is reason for concern as they can harbor genotoxicants as well as potential endocrine disruptors. The aim of this study was to assess both the genotoxic and estrogenic potential of MOs used in printing inks. Mineral oils with various aromatic hydrocarbon contents were tested using a battery of in vitro assays selected to address various endpoints such as estrogen-dependent cell proliferation, activation of estrogen receptor α or transcriptional induction of estrogenic target genes. In addition, the comet assay has been applied to test for genotoxicity. Out of 15 MOs tested, 10 were found to potentially act as xenoestrogens. For most of the oils the effects were clearly triggered by constituents of the aromatic hydrocarbon fraction. From 5 oils tested in the comet assay, 2 showed slight genotoxicity. Altogether it appears that MOs used in printing inks are potential endocrine disruptors and should thus be assessed carefully to what extent they might contribute to the total estrogenic burden in humans.
30 citations
TL;DR: In this article, the authors enumerated hydrogen-degrading bacteria in freshly collected petroleum-rich Guaymas Basin sediments and enumerated on mineral base media separately containing naphthalene, biphenyl, or the aromatic carboxylic acids benzoate, p−hydroxybenzoate and hydrocinnamate.
Abstract: Hydrocarbon‐degrading bacteria in freshly collected petroleum‐rich Guaymas Basin sediments were enumerated on mineral base media separately containing naphthalene, biphenyl, or the aromatic carboxylic acids benzoate, p‐hydroxy‐benzoate, mandelate, salicylate, phenylacetate, phthalate, or hydrocinnamate. The total numbers of bacteria were about 2 orders of magnitude higher on the carboxylic acid media than on the two aromatic hydrocarbons, averaging 105 versus 103 bacteria per gram of sediment. Of 151 isolates of aerobic, mesophilic marine bacteria, 124 grew exclusively on one or more of the aromatic carboxylic acids. The remaining 27 isolates used either naphthalene, biphenyl, dibenzofuran, toluene, or phenanthrene and various combinations of aromatic carboxylic acids. A similarity analysis of 135 of the isolates on the basis of substrate use, sodium chloride requirement, and growth on complex organic marine media identified 91 metabolically different bacterial strains: 21 belonging to the group ...
30 citations
TL;DR: In this paper, the arene-thioether complex radical cations are stabilized at temperatures less than 250 K in aromatic solvents such as toluene by electron donation from the solvent.
Abstract: Time-resolved fluorescence-detected magnetic resonance (FDMR) is used to observe radical cations of thioethers in alkane and aromatic hydrocarbon solvents. Monomeric sulfide radical cations are stabilized at temperatures less than {approximately} 250 K in aromatic solvents such as toluene by electron donation from the solvent. The resulting arene-thioether complex radical cations are examples of mixed complex radical cations involving the interaction between lone-pair and {pi}-orbitals. The solvent interaction inhibits reactions of thioether radical cations (dimer formation and probably proton loss) and retards other radical cation reactions, such as dimer exchange. 39 refs., 7 figs., 4 tabs.
30 citations