Levels of sixteen polycyclic aromatic hydrocarbons (PAHs) in 30 edible tissues of selected frequently-consumed fish and seafood collected from three coastal waters of Niger Delta, namely, Sime, Kporghor and Iko were investigated in 2014. Gas chromatographic analysis were employed for PAHs determination. Observed mean PAHs levels in the samples ranged from below detection limit (BD) of analytica...

Chemical vapor deposition and infiltration of pyrolytic carbon for the production of carbon fiber reinforced carbon is studied by modeling approaches and computational tools developed recently. Firstly, the development of a gas-phase reaction mechanism of chemical vapor deposition (CVD) of carbon from unsaturated light hydrocarbons (C2H4, C2H2, and C3H6) is presented. The mechanism consisting o...

This work describes the gasification of carbon produced during pyrolysis methane. Carbon was deposited on nonporous α−Al2O3 at temperatures ranging between 950 and 1150 °C. The time in contact with methane varied 60 8400 s. Gasification tests were performed range 1000 to 1100 °C steam, CO2 air used as oxidizer. It observed that rate cannot be described by only parameters related conditions (tem...

the voltammetric performance of edge-plane pyrolytic graphite (epg) electrode via adsorptive stripping voltammetry was investigated for study of the electrochemical behavior of omeprazole (omz) in aqueous solution. the results revealed that the oxidation of omz is an irreversible ph-dependent process that proceeds with the transfer of one electron and one proton in an adsorption-controlled mech...

Silicon carbide nanofibers grew on the surface of carbon fibers of a unidirectional carbon preform by CCVD and then chemical vapor infiltration was used to densify the preform to get the SiCNF-C/C composite. The effects of silicon carbide nanofibers on the microstructure of the pyrolytic carbon and the thermal conductivity of the SiCNF-C/C composite were investigated. Results show that silicon ...

The gas phase pyrolysis of trichlorfon was investigated by the on-line gas chromatography - mass spectrometry (GC-MS) pyrolysis and theoretical calculations. Two reaction channels were proposed in the pyrolytic reaction, by analyzing the detected pyrolytic products in the total ion chromatography, including 2,2,2-trichloroacetaldehyde, dimethyl phosphite, and dichlorvos. Theoretical calculation...

We analyzed the electromagnetic (EM) shielding effectiveness in the Ka band (26 to 37 GHz) of highly amorphous nanometrically thin pyrolytic carbon (PyC) films with lateral dimensions of 7.2 × 3.4 mm2, which consists of randomly oriented and intertwined graphene flakes with a typical size of a few nanometers. We discovered that the manufactured PyC films, whose thickness is thousand times less ...

Sediment contamination is of major concern in areas affected by heavy maritime traffic. The spatial variation and 11 trace elements 17 PAHs surface sediments were studied along a 31 km transect the seaway from port Piombino (Tuscany) to Portoferraio (Elba Island) Northern Tyrrhenian Sea. Heavy metal was detected at sites near (Ni, Pb, Hg, Cu Zn) (Pb, Zn, Cr Cd). Each 35 sampled showed PAH conta...

Severe disabling tinnitus (SDT) refers to a symptom severe enough to disrupt affected patients' routine and keep them from performing their daily activities. SDT of a predominantly central origin has been treated successfully with benzodiazepines and GABAergic drugs. Our aim was to test the control of SDT of predominantly cochlear origin by benzodiazepines and GABAergic drugs. We followed the f...