Polynuclear aromatic hydrocarbons (PAHs) from oil were present in some shrimp from Port Valdez, site of a ballast water treatment facility at the Alyeska Alaska Marine Terminal (AMT). Low-level petrogenic PAH concentrations were generally restricted to shrimp eggs in the vicinity of the AMT and extended along the southern shore of Port Valdez to Anderson Bay. Eggs had greater lipid content than...

The nature, origin and distribution of the listed reference US Environmental Protection Agency (EPA) priority pollutants; 16 polycyclic aromatic hydrocarbons (PAHs) were investigated in water, sediment and fish of Temsah Lake (Suez Canal, Egypt) using high performance liquid chromatography (HPLC). The compositions of PAHs determined in all samples were measured in order to use them as chemical ...

We report the observation of proximity effect in measurements performed on highly oriented pyrolitic graphite (HOPG) samples when electrical current is injected through superconducting electrodes placed sample surface few millimeters apart from each other. Such anomalously large surprising, as proximity-induced features normal conductors hardly surpass micrometers. The obtained results can be c...

The Peace-Athabasca Delta (PAD) receives a mixture of hydrocarbons from biogenic, pyrogenic, and petrogenic processes. Source apportionment in the PAD has focussed on polycyclic aromatic compounds (PACs), which are ubiquitous environment susceptible to weathering. In contrast, petroleum biomarkers terpanes, hopanes, steranes degradation-resistant organic found uniquely products that can identif...

Fourteen polycyclic aromatic hydrocarbons (PAHs) included in the US Environmental Protection Agency’s (EPA) priority pollutant list were analyzed using gas chromatography-mass spectrometry (GC–MS). Surface water sampling was undertaken in the Paraguaçu Estuary (Bahia), northern Brazil. Total PAH concentrations varied from 0.0029 to 0.1079 ng/L in the surface waters (main rivers, tributaries) wi...

Structure and properties of terrestrial magma oceans control the co-evolution core, mantle atmosphere early Earth, but are poorly understood because discrepancies remain between experiments theoretical calculations. Here we combine acoustic velocity measurements ab initio simulations on pyrolite glass/melt with a silicate Earth-like composition. In complex system, find gradual increase sound in...

We analyze the dynamics of an atomic force microscopy AFM cantilever oscillating in liquid at subnanometer amplitude in the presence of tip-sample interaction. We present AFM measurements of oscillatory solvation forces for octamethylcyclotetrasiloxane on highly oriented pyrolitic graphite and compare them to a harmonic oscillator model that incorporates the effect of the finite driving force f...

The inelastic electron tunneling spectrum ~IETS! of highly oriented pyrolitic graphite has been measured with scanning tunneling spectroscopy ~STS! at 6 K. The observed spectral features are in very good agreement with the vibrational density of states of graphite calculated from first principles. We discuss the enhancement of certain phonon modes by phonon-assisted tunneling in STS based on th...

The measurement of the electronic structure of anisotropic materials using energy loss near edge structure (ELNES) spectroscopy is an important field of microanalysis in transmission electron microscopy. We present a novel method to study the angular dependence of electron inelastic scattering in anisotropic materials. This method has been applied to the study of 1s-->pi* and sigma* transitions...