Gas Transport Phenomena and Polymer Dynamics in PHB/PLA Blend Films as Potential Packaging Materials.

Actually, in order to replace traditional fossil-based polymers, many efforts are devoted to the design and development of new and high-performance bioplastics materials. Poly(hydroxy alkanoates) (PHA) as well as polylactides are the main candidates as naturally derived polymers. The intention of the present study is to manufacture fully bio-based blends based on two polyesters: poly (3-hydroxybutyrate) (PHB) and polylactic acid (PLA) as real competitors that could be used to replace petrol polymers in packaging industry.

Reference price: a tool for pricing new healthcare services.

The convergent validity and scale reliability of three measures of Reference Price (R-Price) were assessed for a "new" healthcare service using an adult sample. The Pearson correlation, Cronbach's alpha and Factor analysis results indicate that the multiple scale R-Price measure exhibits both reliability and convergent validity. As a result, the R-price scale could be used as an additional input for estimating demand of a healthcare service at a given price.