Tanacetum zahlbruckneriis reported as a new record from northwestern Iran. A complete description, diagnostic characters and a distribution map of T. zahlbruckneriare presented. The phylogenetic position of T. zahlbruckneri in a concise molecular framework based on the sequences of ITS nrDNA data are presented. A taxonomic conclusion about the previously reported samples of this enigmatic speci...

Phenylketonuria (PKU) is the most common autosomal recessive disorder of amino acid metabolism. Thedisease is caused mainly by mutations in the phenylalanine hydroxylase (PAH) gene, encoding phenylalaninehydroxylase (PAH) enzyme. The PAH enzyme deficiency results in the elevation of phenylalanine inthe blood, which may cause severe irreversible mental retardation in the affect...

Fourier transform infrared (FTIR) and gel permeation chromatography (GPC) wre respectively utilized in determining the changes in isocyanate (NCO) concentration and molecular weight (MW) and its distribution (MWD) in polyurethanes during their cure and postcure stages. Samples, originally cured at 45°C, were taken through accelerate aging tests at various temperatures. The FTIR and GPC anal...