Olfactory detection thresholds for 11 structurally diverse musk odorants and one non-musk odorant were obtained from 32 subjects. Hierarchical cluster analysis produced four groups of subjects. One group (n = 12) was uniformly sensitive to all musks; another (n = 16) was uniformly insensitive. Two groups of subjects contained otherwise insensitive individuals who were exceptionally sensitive to...

Abstract Contamination of Lekki lagoon by petrogenic chemicals such as polycyclic aromatic hydrocarbons (PAH) and benzene, toluene, ethylbenzene, xylene (BTEX) has been widely reported. The study was aimed at investigating the bioaccumulation PAH BTEX in Malapterurus electricus collected from Lagos, Nigeria. analyzed intestine, water, sediment samples using 8260B Agilent 7890B gas chromatograph...

Demulsification is a method used to reduce or disrupt the water - crude oil emulsion system without uttering initial composition of oil. This process done by introduction chemicals called demulsifiers, which break into aqueous and organic phases. In this study, demulsifier formulated was base-catalyzed phenol-formaldehyde resin known as resoles, with ratios phenol formaldehyde, varied between 1...

Lab-on-chip integrated infrared spectroscopy and sensing with hybrid polymer and silicon photonic crystal slot waveguides is demonstrated for the specific and selective identification of volatile organic compounds, xylene and toluene, in water. A 300 micron long photonic crystal slot waveguide was demonstrated that enabled the detection of 100ppb xylene in water by near-infrared absorption sign...

Anisotropic dielectric relaxations in several binary nematic mixtures of MBBA and non-mesogenic compound oriented by magnetic field were measured in the frequency range of 300 Hz to 3 MHz. Viscosity measurements were also made in the isotropic state. Non-mesogenic compounds used were non-linear shaped molecules such as chloroform, m-xylene, and 1,3,5-trimethylbenzene, and nearly linear shaped m...