In this study, a novel and environmentally benign o-phenylendiamine stabilized on silica-coated Fe3O4 magnetic nanocatalyst (Fe3O4@SiO2@propyltriethoxysilane@o-phenylendiamine-SO3H/HCl) as a hybrid magnetic organometallic nanocatalyst has been synthesized. After that, the structure of this new catalyst was compl...

OBJECTIVES Current understanding on health effects of long-term polycyclic aromatic hydrocarbon (PAH) exposure is limited by lack of data on time-varying nature of the pollutants at an individual level. In a cohort of pregnant women in Krakow, Poland, we examined the contribution of temporal, spatial, and behavioral factors to prenatal exposure to airborne PAHs within each trimester and develop...

Three orthogonal cascade CH functionalization processes are described, based on ruthenium-catalyzed CH alkenylation. 1-Indanones, indeno indenes, and indeno furanones were accessed through cascade pathways by using arylacetophenones as substrates under conditions of catalytic [{Ru(p-cymene)Cl2 }2 ] and stoichiometric Cu(OAc)2 . Each transformation uses CH functionalization methods to form C...

This study investigated the PAH levels in Wistar rats exposed to ambient air of Port Harcourt metropolis. Twenty imported from a nonpolluted city (Enugu) were both indoor and outdoor air. Following IACUC regulation, baseline data obtained 4 randomly selected rats, while remaining 16 (8 each for outdoor) left till day 90. Blood samples by cardiac puncture, determined using Gas Chromatography Fla...

PAHs are fused ring aromatic pollutants some of which are highly carcinogenic to humans and are persistent in the environment. The objective of this study was to develop a suitable extraction method for PAHs from river water samples, identify and quantify the individual compounds. An optimized reverse solid phase extraction (SPE) method was used after conditioning the sorbent to extract and pre...

Numerous polycyclic aromatic hydrocarbons (PAHs) are carcinogenic, making their presence in foods and the environment a health concern. This study assessed the contamination and or/ formation of PAHs in cocoa butter as affected by their cocoa bean drying methods. Three major drying methods were evaluated, including full sundrying, full artificial drying and the drying combination of sundrying f...

Children represent one of the most vulnerable groups in society. The detailed characterization of pollution (both indoors and outdoors) of schools is of great importance, since it may allow preventing potential risks to children health. Yet the information related to carcinogenic compounds, such as some polycyclic aromatic hydrocarbons (PAHs) in child educational settings is very limited. Thus ...

Diverse 11H-indeno[1,2-c]quinolines are produced via a palladium-catalyzed three-component reaction of 2-alkynylbromobenzene, 2-alkynylaniline, and electrophile. This conversion tolerates a wide variety of functionality and substitution patterns on the 11H-indeno[1,2-c]quinoline ring.

Biodegradation of pyrene and indeno(1,2,3-cd)pyrene in reed rhizosphere soil was carried out in a small-scale wetland simulator using reed as well as microorganisms immobilized on cinder beads under natural environmental conditions. The results show that the stability of the introduced strains was enhanced upon immobilization and that the depletion of pyrene and indeno(1,2,3-cd)pyrene after 40 ...

We report a new synthetic route to 5,11-disubstituted indeno[1,2-b]fluorene-6,12-diones that is amenable to larger scale reactions, allowing for the preparation of gram amounts of material. With this new methodology, we explored the effects on crystal packing morphology for the indeno[1,2-b]fluorene-6,12-diones by varying the substituents on the silylethynyl groups.