amino acid profiling in routine clinical analysis (1,2). As analysts started using capillary electrophoresis (CE) in the 1990s, they were able to successfully use most of the popular reagents from LC analyses in electromigration techniques. The remarkable progress in detection technologies — such as diodearray ultraviolet (UV), laser-induced fluorescence, evaporative light-scattering, and mass ...

Abstract The permanganate index (PI), oil and grease (O&G), 17 polycyclic aromatic hydrocarbons (PAHs) were analyzed in surface sediment water samples collected at 13 sites along the western coast of Suez Bay (SB). PI O&G SB coastal seawater ranged from 9.6 mg O 2 l −1 17.0 to 16.0 37.0 , respectively. level (PAH) offshore area was determined by gas chromatography/flame ionization detec...

We report a procedure for determining D-mannose in serum. After removal of proteins and lipids, the carbohydrate-containing fraction is treated to form the aldononitrile acetate derivative and analyzed by gas--liquid chromatography with a flame-ionization detector. D-Mannose and D-glucose had retention times of 31 and 34 min, respectively. Day-to-day reproducibilities (CV) of between 2 and 12% ...

Background: Nanotechnology is a new approach that has been lionized in recent years. One of its applications is its consumption as an absorbent. In this study, the single-wall carbon nanotubes (SWCNTs) were used as an absorbent for sampling benzene in the air. Materials and Methods: For this study, SWCNTs manufactured by Iran and SKC’s activated charcoal were used for sampling benzene vapors....

The work presented in this thesis concerns the development and evaluation of new methods for sampling and analysis of organic pollutants in the indoor and outdoor environment. In Paper I, the development of a new method was reported for the determination of the brominated fl ame retardant tetrabromobisphenol A (TBBPA) in air using sampling with glass fi ber fi lter and polyurethane foam (PUF), ...

The genus Ocotea of the Lauraceae family has species whose wood is employed in construction and for other purposes including as biofuel, disinfection, cosmetics, treatment various diseases. Studies regarding caudata’s phytochemical pharmacognostic uses are scarce, thus, this work first to study its fruits. O. caudata (Nees) Mez fruits from Colombia were investigated their oil content. Heptane e...

A sodium pump inhibitor (digitalis-like factor), isolated from the peritoneal dialysate of volume-expanded, hypertensive patients with kidney failure who were treated with this dialysis modality, was further purified and characterized by means of supercritical fluid chromatography, a separation technique whose application to very-low-concentration biomolecules is new. Previous studies suggested...

acrylic base resins are widely used in orthopedics and dental surgery. it is generally accepted that due to the incomplete conversion of methyl methacrylate (mma) monomer to the polymer form during polymerization of the resin, some mma monomers remain in the hardened material. mma monomer has been reported to cause abnormalities or lesions in several organs of animals. study of the literatures ...