What's the difference between chrysene and hydrocarbon?

Chrysene


Definition:

  • (n.) One of the higher aromatic hydrocarbons of coal tar, allied to naphthalene and anthracene. It is a white crystalline substance, C18H12, of strong blue fluorescence, but generally colored yellow by impurities.

Example Sentences:

  • (1) 4H-Cyclopenta[def]chrysen-4-one and 1-methyl-4H-cyclopenta[def]phenanthrene displayed weak tumorigenic activity at a total initiating dose of 1.0 mg.
  • (2) Anthracene, chrysene, benzo(e)pyrene and perylene did not significantly suppress the antibody-forming cell response compared to the corn oil vehicle controls.
  • (3) The PCAH's identified in SRF-carbon black were: anthracene, phenanthrene, fluoranthene, pyrene, benzo(mno)fluoranthene, chrysene, 1,2-benzanthracene, 9,10-dimethyl-1,2-benzanthracene, 1,2-benzopyrene, 3,4-benzopyrene, perylene, o-phenylene pyrene 1,2-benzoperylene, anthanthrene, and coronene.
  • (4) Since 5,12-dimethylchrysene had previously been shown to be only a weak tumor initiator, these results support the generalization that the structural requirements favoring carcinogenicity among the methylated chrysenes and other polynuclear aromatic hydrocarbons (PAH) are a bay region methyl group and a free peri position, both adjacent to an unsubstituted angular ring.
  • (5) Ether-permeabilized (nucleotide-permeable) Escherichia coli cells exhibited DNA excision repair when exposed to the following carcinogenic K-region epoxides: 7-methyl- and 7,12-dimethyl-benz[a]anthracene-5,6-oxide, chrysene-5,6-oxide and benzo[a]pyrene-4,5-oxide.
  • (6) Combustion gas drying had no effect for the larger PAHs such as benzo(a)pyrene but caused mean increases of between 41% and 126% for fluoranthene, pyrene and chrysene.
  • (7) Cells of a permanent clonal line of fetal hamster lung metabolized 97% of the chrysene whereas fetal human bronchial epithelial cells converted 24% of the substrate within 8 days incubation.
  • (8) The gas-liquid chromatographic (GLC) analysis of benzene extract of fly ash showed the presence of 28 polyaromatic hydrocarbons, of which only phenanthrene, anthracene, pyrene, benz[a]anthracene, chrysene, and benzo[a]pyrene could be identified.
  • (9) No PV induction was observed with the non-carcinogenic polycyclic hydrocarbons pyrene chrysene and benz(a)-anthracene.
  • (10) Previous reports on the inhibitory effect of 6-amino-chrysene (6AC) on benzo(a)pyrene (BP) metabolism using single living cells have suggested that aryl hydrocarbon hydroxylase (AHH) is not the only pathway for 6AC metabolism.
  • (11) Moreover, the induction properties of some carcinogenic and non-carcinogenic hydrocarbons (benz[a]anthracene, pyrene, chrysene, benzo[a]-pyrene, benzo[e]pyrene, benzo[b]fluoranthene, benzo[j]fluoranthene, benzo[k]fluoranthene) have been studied.
  • (12) The tumor-initiating activities of chrysene and the three metabolically possible trans-dihydrodiols at the 1,2-, 3,4-, and 5,6-positions of chyrsene were determined on the skin of female CD-1 mice.
  • (13) Besides, dependence of theophylline elimination rate constant on the time of chrysene dosing was also shown.
  • (14) The results indicate that nitro substitution at the 6-position of chrysene is critical for strong tumorigenicity in the newborn mouse assay.
  • (15) Fifty-four polycyclic compounds, 29 of the cyclopenta[a]phenanthrene series, 11 chrysenes, and 14 benz[a]anthracenes, have been tested for mutagenicity by Ames's method, using Salmonella typhimurium TA100.
  • (16) For one of them, the diol-epoxides of benzo(g)chrysene, the delta Edeloc value for the formation of the benzylic carbocation is lower than for the benzo(c)phenanthrene diol-epoxides, for the other it is higher.
  • (17) We have evaluated both electron ionization (EI) and negative-ion chemical ionization (NICI) methods for the analysis of trimethylsilyl derivatives of a series of polycyclic aromatic hydrocarbon (PAH) alcohols including styrene diol, benzo[e]pyrene diol and tetrols, cyclopenta[c,d]pyrene diols, benzo[a]pyrene-4,5-diols, chrysene tetrols, benz[a]anthracene tetrols I and II, and syn- and anti-benzo[a]pyrene tetrols.
  • (18) 4,5-Methylenechrysene elicited twice as many tumors as chrysene at each of the doses tested.
  • (19) To study whether this is a unique property of these compounds or a more general characteristic of fjord-region diol-epoxides, we have synthesized the anti- and syn-diastereomers of r-9,t-10-dihydroxy-11,12-oxy-9,10,11,12-tetrahydrobenzo(c)chrysene and r-11-t-12-dihydroxy-13,14-oxy-11,12,13,14-tetrahydrobenzo(g)chrysene.
  • (20) The compounds included in this series were 4H-cyclopenta[def]phenanthrene, 4H-cyclopenta[def]phenanthrene-4-one, 1-methyl-4H-cyclopenta[def]phenanthrene, 1-methyl-4H-cyclopenta[def] phenanthren-4-one, 4H-cyclopenta[def] chrysene, and 4H-cyclopenta[def] chrysen-4-one.

Hydrocarbon


Definition:

  • (n.) A compound containing only hydrogen and carbon, as methane, benzene, etc.; also, by extension, any of their derivatives.

Example Sentences:

  • (1) The high transition enthalpy for kerasin is ascribed to a lesser accommodation of gauche conformers in the hydrocarbon chains just below the transition temperature.
  • (2) Aryl hydrocarbon hydroxylase (AHH) inducibility, carbon monoxide in expired air (CO), serum gammaglutamyl-transferase (GGT), and total cholesterol were compared in equal-sized, age-matched samples of healthy middle-aged males born in 1921, 1934-1936, and 1946 attending the ongoing preventive medical population program in Malmö.
  • (3) The length of the hydrocarbon chains of the surface-modified silica supports had no significant influence on the selectivity.
  • (4) The specificity of binding to microsomal proteins of metabolically activated hydrocarbons has been studied.
  • (5) Aryl hydrocarbon (benzo(a)pyrene) hydroxylase is present and inducible in Buffalo rat liver cells in culture.
  • (6) The possible occupational cause of the disease, as more solvents in the mud have the structure of aromatic hydrocarbons is discussed.
  • (7) Experiments with a series of adsorbents homologous with CPAD-Sepharose, in which the length of the hydrocarbon chain was varied, provided strong evidence of hydrophobic interactions, in addition to ionic interactions, in the binding of these proteins to CPAD-Sepharose.
  • (8) In the hydrocarbon promotion study, dose related increases were observed in the incidence of ACF in male rats promoted with UG or 50 ppm TMP for 24 or 60 weeks.
  • (9) The results also demonstrated that there was not any apparent correlation between the receptor-binding avidities and in vitro monooxygenase enzyme-induction potencies for the most active polynuclear aromatic hydrocarbons.
  • (10) Both main-stream and side-stream cigarette smoke condensates and some fractions, containing water-soluble bases, water-insoluble bases, and polycyclic aromatic hydrocarbons, were found to induce AHH activity in lung and liver, the lung being induced to the greatest extent.
  • (11) Pancreas transplantation offers the possibility of preventing the development and progression of diabetic lesions by adequate control of hydrocarbon metabolism.
  • (12) A comparison of the relative cytosolic Ah (9S) receptor binding affinities and aryl hydrocarbon hydroxylase (AHH) induction potencies of these hydrocarbons with their 4S protein binding affinities demonstrated the following: five compounds, namely 1,2,5,6-dibenz[a]-anthracene, 1,2,3,4-dibenz[a]anthracene, picene, benzo[a]pyrene and 3-methylcholanthrene exhibited high to moderate binding affinities for the 4S and 9S cytosolic proteins (EC50 values less than 10(-6) M) and induced AHH in rat hepatoma cells; three compounds, namely perylene, benzo[e]pyrene and benzo[g,h,i]perylene exhibited high affinities for the 4S binding protein (1.25 X 10(-7), 4.4 X 10(-8) and 2.9 X 10(-8) M, respectively) and low affinities (EC50 values greater than 10(-5) M) for the Ah receptor protein; moreover these three compounds did not induce AHH in rat hepatoma H-4-II E cells in culture.
  • (13) It was found that HBSAg was strongly bound to straight hydrocarbon chains with more than seven carbon atoms.
  • (14) The parent hydrocarbons and the related K-region dihydrodiols induced some sister-chromatid exchanges but they were considerably less active than these two non-K-region diols.
  • (15) The effect of various fuel additives on the ability of platinum-palladium catalytic converters to remove the carbon monoxide and hydrocarbon components of automotive exhaust has been examined.
  • (16) Other chlorinated hydrocarbons as decachlorobiphenyl, pentachloronaphthalene, hexachloronaphthalene and hexachlorostyrene were identified, but not quantified.
  • (17) It has been estimated that natural oil seeps may also contribute as much as 10% of the hydrocarbons in the global marine environment.
  • (18) The metabolic fate of the carcinogenic aza-aromatic hydrocarbon 7-methyl[7-(14)C]benz[c]acridine (14C-7MBAC) was studied in hepatocytes freshly isolated from untreated, phenobarbital-pretreated and 3-methylcholanthrene-pretreated rats.
  • (19) Renal cytochrome P450, aryl hydrocarbon hydroxylase, 7-ethoxycoumarin-O-deethylase, and benzphetamine N-demethylase were increased after partial hepatectomy by 84%, 360%, 165% and 406%, respectively.
  • (20) Antioxidants devoid of hydrocarbon tails, are 10-20 fold more potent LPO inhibitors than the corresponding AOs with hydrocarbon tails.

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