In this paper the influence of non-acoustic properties on the sound absorption coefficient of polyurethane foams as a porous medium is investigated. Biot’s equations with transfer matrix method, as the solution approach are employed to evaluate the sound absorption coefficient of selected polyurethane foams. The major issue is the dependency of non-acoustic properties on each other which makes ...

Use of permanent hair dyes and the risk of breast cancer. A prospective study of permanent hair dye use and hematopoietic cancer. dye use and breast cancer: a case-control study among screening participants. Mortality of workers exposed to toluene diisocyanate in the polyurethane foam industry. Response In his comments on our paper, Kulig states that "the estimated dose of polyurethane was too ...

BACKGROUND AND AIM The increasing number of surgical procedures performed with local anesthesia, followed by immediate patient discharge from the hospital, emphasizes the need for a tight waterproof suture that is capable of maintaining its tensile strength in the postoperative phase when the wound tumescence, edema due to the anesthetic drug, and surgical trauma disappear. Moreover, the issue ...

Silane terminated prepolymers for adhesives, sealants and coatings are of great industrial importance. They very important because their low toxicity over polyurethanes, silicones, solvent-based products. Hence, many pieces literature which deal with the synthesis, properties applications this polymers hybrid system exist. Silylated polyether (MS polymers) Polyurethane Polymers (SPUR) bases num...