We have identified, by gas chromatography/mass spectrometry, four alkylphenols that are present in the hemolymph and tissues of the American lobster Homarus americanus and in marine sediments. These alkylphenols are used industrially in antioxidant formulations for plastic and rubber polymer manufacturing, and are similar in structure to a known endocrine disruptor, bisphenol A. The compound 2-...

By using an ionic liquid of 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, we uniformly dispersed single-walled carbon nanotubes (SWNTs) as chemically stable dopants in a vinylidene fluoride-hexafluoropropylene copolymer matrix to form a composite film. We found that the SWNT content can be increased up to 20 weight percent without reducing the mechanical flexibility or softnes...

A 52-year-old female patient with a past history of alcohol consumption (> 100 g/ethanol per day) was admitted in 2005 suffering from severe upper gastrointestinal bleeding with hemodynamic deterioration. After admission, she was treated with somatostatine (6 mg/24 h), and an urgent gastroscopy was performed. This revealed active jet bleeding from a big fundal varix (Fig. 1). An elastic rubber ...

Allergic contact dermatitis developed on the hands and/or face of two patients after exposure to latex examination gloves. Both patients were patch test negative to the usual rubber allergens, but both had a positive patch test reaction to 4,4'-thiobis(6-tert-butyl-m-cresol) (Lowinox 44S36). Patient 2 was also patch test positive to butylhydroxyanisole. The patients were tested with other glove...

The performance of nine different vapor barrier systems comprising polyethylene (PE) membranes were assessed. comprised virgin PE, 100% new regenerated PE and multilayered PE. Membranes joined either with tape suited to the individual system or an adhesive base on butyl rubber. evaluated compared using standard laboratory tests. Chemical analytical techniques physicomechanical tests used. Mecha...

in this study an empirical model which can be used to predict the rutting parameter (g*/sinδ) for neat and powder rubber modified bitumen describes. the model was developed using 36 unique powder rubber modified bitumen combinations, rubber concentrations were varied at 5% intervals between 5 and 20%. the effects of powder rubber particle size on model accuracy were also studied ultimately a mo...