x-acetylaminofiuorene N-hydroxy-2-acetylamino fluorene x-hydroxy-2-acetylamino fluorene 2-hydroxylaminonaphthalene Recently it has become apparent that an increasing number of carcinogens are capable of interacting with nucleic acids (10, 14, 923). These observations may be causally related to the mech anism of carcinogenesis as being a special case of mutagenesis. The chemical reactions of som...

The Cu(I)-catalysed 1,3-dipolar "click" cycloaddition is utilised as an efficient reaction for the preparation of novel fluorene-based conjugated polymers.

The synthesis of statistical fluorene-type copolymers with on-chain Pt-salen phosphorescent units and their use in electrophosphorescent OLEDs is reported.

In the title compound, C(31)H(22)O(2), the bond angle at the C atom belonging to the five-membered ring of the fluorene system is opened to 112.64 (12)°. The two benzene rings are twisted with respect to the fluorene ring system at dihedral angles of 72.81 (6) and 81.83 (6)°. One C(ar-yl)-O-C-C  fragment is extended, with a C-O-C-C torsion angle of -178.77 (13)°, but the other C(ar-yl)-O-C-C  f...

New derivatives involving the photochromic 2H-benzo[h]chromene moieties covalently linked to the 2,7-bis(carbazolyl)fluorene-derived two-photon absorbing moiety were designed to enable the possibility of resonance energy transfer from the fluorene donor to the photochromic acceptor. The longest wavelength absorption of the photochromic acceptors overlaps with the fluorescence band of the two-ph...

an aquifer located within a petroleum processing plant in moín, costa rica, suffers hydrocarbon pollution. this study aimed to determine the ability of indigenous microorganisms from this site to degrade polycyclic aromatic hydrocarbons (pahs) to evaluate the feasibility of an eventual bioremediation process. aerobic conditions were found in the aquifer, while microbial analyses of the groundw...

We report a straightforward and generic synthesis of several new series annulated ?-extended poly-(hetero)aromatic hydrocarbons (PAH), with carbazole, fluorene fluorenone central building blocks by the Suzuki-Miyaura/Scholl tandem reactions. The corresponding ditriphenylene discogens carbazole or core, respectively, possess hexagonal columnar mesophases broad mesophase ranges high clearing poin...

Soil microorganisms play an important role in the degradation of PAHs and use various metabolic pathways for this process. The effect soil pH, different amendments co-cultivation fungi on activity ligninolytic enzymes was evaluated. For that purpose, three were studied: Trichoderma viride, Penicillium chrysogenum Agrocybe aegerita. Biodegradation assays with a mixture 200 ppm (fluorene, pyrene,...

BACKGROUND Polycyclic aromatic hydrocarbons (PAH) are both man-made and naturally occurring environmental pollutants that may be related to cardiometabolic health risk. OBJECTIVE To determine whether PAH is associated with obesity in the adult population and to examine whether urinary concentrations of PAH metabolites are associated with differences in how obesity relates to 3 or more risk fa...