Abstract: The present specification generally relates to aqueous based compositions of poly hydroxyalkanoate (PHA) and polymer blends of PHA for use with food contact items and similar packaging films. In particular, the invention pertains to a composition and an article of manufacture having a coating or laminate made up of poly(3-hydroxybutyrate) homopolymer (PHB) having a final coating thickness in the range of 0.1 to 2.0 mil thickness dry weight, or in a weight basis of about 3 to 70 grams per square meter coat weight basis. Methods of making the compositions of the invention are also described. The invention also includes articles and films comprising the compositions.

Abstract: The systems and methods described herein allow for the application of a bias voltage to one or more transducers implemented within a medical ultrasound imaging system. Bias circuitry is placed within an imaging device and used to apply a DC bias to one or more transducers requiring a DC bias to operate. The one or more transducers can be fabricated in a semiconductor manufacturing process and integrated with the bias circuitry on a common semiconductor substrate. Also provided is a method for operating the one or more transducers and bias circuitry using a communication channel having two signal lines.