نتایج جستجو برای: phenanthrene derivatives

تعداد نتایج: 106589  

اعظم, کمال , دیوانی, راضیه , شاه طاهری, سید جمال‌الدین , عابدینلو, رضوان , مرادی, روح الدین ,

Introduction: Polycyclic Aromatic Hydrocarbons (PAHs) belong to one of the groups of persistent organic pollutants (POPs) which are the result of incomplete combustion of organic materials, volcanic eruptions and forest and agricultural fields’ fires in the environment. However, human factors are main source of these pollutions. Nowadays, these compounds are among the main concerns related to t...

Organisms in different environmental conditions express different genes, which result in different protein expressions. These changes result from the adaptation of the organism to environmental conditions such as the presence of toxic substances. This study aimed to investigate the changes in protein expression in Celeribacter persicus SBU1 isolated from Nayband Bay mangrove forests, cultured i...

Fahimeh Teimouri , Mohammad Mehdi Amin , Pegah Salehi , Tayebe Kalteh ,

Introduction: Bioremediation convertssoils pollutants to safe and non-toxic substance through metabolic activities of microorganisms. This research was conducted to evaluate the effect of bacteria on removal of phenanthrene and anthracene from polluted soils using chicken manure as an auxiliary substrate. Materials and Methods: First, uniformly-graded soils were transferred to the pilots, then...

Journal: :Cancer research 1979
M K Buening W Levin J M Karle H Yagi D M Jerina A H Conney

nogenic activity (4). Chrysene, which has one more benzene ring than does phenanthrene, is a symmetrical molecule with 2 identical bay regions (Chart 1). Chrysene has weak activity in carcinogenicity tests (4, 11). Quantum mechanical aspects of the bay region theory predict (6) that bay-region 1,2-diol 3,4-epoxides of chrysene and phenanthrene should have sim ilar chemical reactivities. Kinetic...

2014
Yue Sun Charles A Miller Thomas E Wiese Diane A Blake

Alkylated polycyclic aromatic hydrocarbons (APAHs) are abundant in petroleum, but data regarding their toxicological properties are limited. A survey of all monomethylated phenanthrene structures revealed that they were 2 times to 5 times more potent than phenanthrene for activation of human aryl hydrocarbon receptor in a yeast bioassay. Phenanthrenes with equatorial methyl groups had the great...

Journal: :Bioresource technology 2013
Junyeong Park Ivan Hung Zhehong Gan Orlando J Rojas Kwang Hun Lim Sunkyu Park

The relationship between physicochemical properties of biochar-based activated carbons and its adsorption was investigated using an aromatic model compound, phenanthrene. Solid-state (13)C NMR analysis indicated more condensed aromatic structures when pyrolysis temperature increased or after activation process induced. The increasing aromaticity and non-protonated carbon fraction of the activat...

2011
Nicole Schneider

Cyclopentalljphenanthrene titanium trichloride and its 2-methyl and phenyl derivatives were synthesized; the crystal structure of the 2-mcthyl-substituted complex was determined by X-ray diffraction analysis. In the presence of methylalumoxane (MAO), these complexes give highly active catalysts for the syndiotactic polymerization of styrene; the 2-phenyl-substituted complex exceeds all previous...

2010
C. A. M. A. Huq S. Sivakumar M. NizamMohideen

In the title compound, C(19)H(13)NO(2), the pyridyl ring makes a dihedral angle of 87.04 (6)° with the plane of the phenanthrene ring system. In the crystal, mol-ecules are linked through weak inter-molecular C-H⋯O hydrogen bonds and C-H⋯π inter-actions.

2008
A. R. Beltramone D. E. Resasco W. E. Alvarez T. V. Choudhary

Hydrogenation of six model feeds containing three-, two-, and one-ring aromatic compounds was investigated to gain insights into the aromatic hydrogenation reaction chemistry over a commercial NiMo catalyst under practical reaction conditions. The hydrogenation reactivity of the aromatic compounds followed the following order: phenanthrene ∼ two-ring aromatics . one-ring aromatic. Comparison wi...

2010
Hoong-Kun Fun Jia Hao Goh Yang Liu Yan Zhang

In the title phenanthrenone compound, C(18)H(13)NO(2)S, the dihydro-phenanthrene ring system is not planar, with its central ring distorted to a screw-boat conformation. The essentially planar thia-zole ring [maximum deviation = 0.005 (1) Å] is inclined at an inter-planar angle of 23.36 (5)° with respect to the mean plane through the dihydro-phenanthrene ring system. In the crystal packing, int...

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