A liquid chromatographic separation of polycyclic aromatic sulfur heterocycles (PASHs) from the hydrocarbons (PAHs) is recommended to avoid interferences PAHs ensure that PASH determination reliable when gas chromatography with mass-selective detection employed. Examples are included show this also allows be analyzed correctly without interference PASHs. Sulfur compounds frequently determined in geochemical investigations crude oils, source rocks, and environmental samples used as markers...

A crude oil sample from the Assran field in Central Gulf of Suez (Egypt) was analysed geochemically and characterized terms a variety source maturity dependent biomarkers. Biodegradation indicated by increasing concentration ratios Pr/n‐C 17 Ph/n‐C 18 . However, biodegradation only slight as GC‐MS analyses saturate aromatic fractions showed that hopanes, steranes, steroids polycyclic compounds including sulphur heterocycles remained intact. The sterane hopane distributions predominance C 27...

Fourier transform ion cyclotron resonance mass spectrometry was applied to the analysis of complex distribution sulfur compounds North African crude oils. The compound fingerprints were used for characterization oils from Gulf Suez and Western Desert Egypt. Because a spectrometric technique involved, information supplied by high-molecular-mass could be collected, in contrast previous attempts that mainly gas chromatography low-molecular-mass compounds. results showed large variations...

Abstract This study represents a forensic chemical analysis to identify the source(s) of tar balls polluting several beaches Mediterranean city Alexandria, Egypt. Concentrations six metals (vanadium [V], nickel [Ni], magnesium [Mg], iron [Fe], cobalt [Co], and copper [Cu]) were studied in balls, collected from different locations along coast Egyptian crude oils as possible source oils. The metal concentrations generally higher than V/Ni marker indicated that, some might have originated...

Abstract The polyaromatic compositions of 12 Egyptian crude oil samples from the Western Desert and Gulf Suez regions were analyzed using gas chromatography in conjunction with sulfur-selective atomic emission detection. results show variation distributions benzothiophenes dibenzothiophenes oils different maturity levels. ratio to has been applied successfully as tool evaluate changes where it correlates well other parameters. A cross-plot benzothiophenes/dibenzothiophenes versus...

This study was conducted to determine what effects nanoparticles (NPs) like TiO 2 , ZnO, and Ag may pose on natural attenuation processes of petroleum hydrocarbons in contaminated soils. The solid NPs used were identified using x‐ray diffraction technique their average size certified as 18.2, 16.9, 18.3 nm for Ag‐NPs, ZnO‐NPs, ‐NPs, respectively. soil microcosms behave differently where it dissolved case partially ZnO‐NPs or changed into other crystalline phase ‐NPs. In this investigation,...

A new series of N'-substituted benzylidene-2-(4-oxo-2-phenyl-1,4-dihydroquinazolin-3(2H)-yl)acetohydrazide (5a-5h) has been synthesized, characterized by FT-IR, NMR spectroscopy and mass spectrometry tested against human monoamine oxidase (MAO) B. Only (4-hydroxy-3-methoxybenzylidene) substituted compounds gave submicromolar inhibition MAO-A MAO-B. Changing the phenyl substituent to methyl on unsaturated quinazoline ring (12a-12d) decreased inhibition, but a less flexible linker (14a-14d)...

High-molecular-weight polycyclic aromatic sulphur heterocycles (HMPASH) were applied in a forensic chemical analysis to identify the source(s) of environmentally weathered residues polluting beaches Mediterranean city Alexandria, Egypt, and assess their weathering trends. The HMPASH investigated by Fourier transform ion cyclotron resonance mass spectrometry an Egyptian crude as possible source oil. dibenzothiophenes/naphthenodibenzothiophenes (DBE 9/DBE 10) parameter indicated that two...

Abstract Innovative and cost-effective paper sheets with superior fire safety reinforcement properties have been developed. The were fabricated via valorization of agricultural waste to then coated nanoparticles. Paper attained from rice straw was used create the sheets. Afterward, bentonite incorporated in these sheets, finally, PbO nanoparticles on prepared nanocomposites. mass ratio altered. flammability mechanical developed nanocomposites studied. flame retardancy nanocomposite...

The purpose of this study was to enhance the antimicrobial activity bagasse paper by coating with bismuth oxide (Bi2O3) and using it accelerate process wound healing. Paper sheets were prepared from sugarcane waste (bagasse). First, coated different Bi2O3 concentrations improve paper. After that, allowed dry in an oven at 50 °C for 3 h. Then, vitro evaluated against microbial species, including Gram-negative bacteria (i.e., Klebsiella pneumonia, Escherichia coli) Gram-positive Staphylococcus...

Abstract Application of trace-metal and biological markers to geochemical studies has shown that crude oils could be correlated or differentiated according their geologic age. The V/Ni, V/Σ Ni, Mg, Fe), Pr/Ph were almost uniform in Gulf Suez oils, revealing same origin, yet showing marked differences Western Desert reflecting varying degrees maturity migrational history. significance petroleum was extended monitoring oil spill sources. Weathering spills usually renders source identification...