Abstract: The invention relates to a method for forming a dried absorbent foam having an open pore network and pores by preparing an aqueous dispersion comprising an enzymatically biodegradable biopolymer and a foaming agent and optionally one or more of gel-forming ions, a plasticizer, a crosslinking agent and a pH modifier, forming, preparing or mixing a foam from the aqueous dispersion and drying the foam to form a dried foam containing open pores. Gelled composites made from the foams are also provided. The invention is particularly useful in providing foams and composites for use in biomedical applications and as an anti-adhesive in tissue regeneration and wound management.

Abstract: Methods and apparatuses for a dual heterojunction multijunction solar cell are disclosed. A method in accordance with the present invention comprises growing a base material for a solar cell, growing at least one dual heterojunction on the base material, and growing an emitter on the at least one dual heterojunction. An apparatus in acccordance with the present invention comprises a substrate, and a first subcell, coupled to the substrate, wherein the first subcell comprises a base region, coupled to the substrate, an emitter region, and at least one dual heterojunction, coupled between the base region and the emitter region, wherein the at least one dual heterojunction has a lower bandgap than the emitter region.