polyethylene imide was synthesized from the reaction of high density polyethylene grafted maleic anhydride (pe-g-ma) and 1,4-diaminobutane in boiling xylene. the chemical compositions of the reaction products were examined by fourier transform infrared spectroscopy. different conditions and parameters like the effect of temperature, time, monomer concentration and oxygen on the extent of reacti...

This article has as goal to discuss the importance of Intellectual Capital’s management obtain positive results from investments Human Capital sector Resources institutions a private administrative nature and check what generates more in Capital: investment human resources for titration or new ways Capital. From reach these goals, problem will be answered: How terms Capital? The hypothesis that...

background and objectives: vaccination is the major strategy to protect nurses against infection with hepatitis b virus. however, some nurses do not produce sufficient amount of anti-hbsag antibody required for immunity against infection. chronic occupational stress has been proposed as a risk factor to humoral immunity. given that nursing staff is exposed to occupational stress risk, this stud...