Abstract: A microvascular system includes a solid polymeric matrix and a woven structure in the matrix. The woven structure includes a plurality of fibers, and a plurality of microfluidic channels, where at least a portion of the microfluidic channels are interconnected. The microvascular system may be made by forming a composite that includes a solid polymeric matrix and a plurality of sacrificial fibers in the matrix, heating the composite to a temperature of from 100 to 250° C., maintaining the composite at a temperature of from 100 to 250° C. for a time sufficient to form degradants from the sacrificial fibers, and removing the degradants from the composite. The sacrificial fibers may include a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the fiber matrix, where the concentration of the metal in the fiber matrix is at least 0.1 wt %.

Abstract: A microvascular system includes a solid polymeric matrix and a woven structure in the matrix. The woven structure includes a plurality of fibers, and a plurality of microfluidic channels, where at least a portion of the microfluidic channels are interconnected. The microvascular system may be made by forming a composite that includes a solid polymeric matrix and a plurality of sacrificial fibers in the matrix, heating the composite to a temperature of from 100 to 250° C., maintaining the composite at a temperature of from 100 to 250° C. for a time sufficient to form degradants from the sacrificial fibers, and removing the degradants from the composite. The sacrificial fibers may include a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the fiber matrix, where the concentration of the metal in the fiber matrix is at least 0.1 wt %.

Abstract: A thermally degradable polymeric fiber comprising a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal in the form of a compound selected from the group consisting of an alkaline earth metal oxide, a tin salt of a mono- or di-carboxylic acid, and scandium triflate (Sc(0Tf)3), where the concentration of the metal in the fiber matrix is at least 0.1 wt %.

Abstract: A microvascular system includes a solid polymeric matrix and a woven structure in the matrix. The woven structure includes a plurality of fibers, and a plurality of microfluidic channels, where at least a portion of the microfluidic channels are interconnected. The microvascular system may be made by forming a composite that includes a solid polymeric matrix and a plurality of sacrificial fibers in the matrix, heating the composite to a temperature of from 100 to 250° C., maintaining the composite at a temperature of from 100 to 250° C. for a time sufficient to form degradants from the sacrificial fibers, and removing the degradants from the composite. The sacrificial fibers may include a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the fiber matrix, where the concentration of the metal in the fiber matrix is at least 0.1 wt %.

Abstract: Disclosed herein are heteromeric molecules comprising two or more different pathogen associated molecular patterns (PAMPs), wherein the two or more PAMPs are linked together with discrete, linear inter-PAMP spacing. Also disclosed are immunogenic compositions comprising the heteromeric molecules and related methods of stimulating an immune response in vivo in a subject or ex vivo comprising administering the immunogenic composition to cells. Also disclosed is a method of synthesizing an immunostimulant comprising: identifying 2 or more different PAMPS, covalently linking the 2 or more different PAMPS together, varying spacing between the 2 or more different PAMPs, and testing the effect of spacing between the 2 or more different PAMPS to identify an optimal spacing that results in immune stimulation.