Abstract: Methods and systems for the enhancement of bioproduct process yields. The present invention provides systems and methods for improvement of the carbon conversion efficiency by yeast of an organic substrate such as a fermentable sugar to a fermentation product such as ethanol. Exemplary yield-increasing/growth-inhibitory compounds include tyrosol (TyrOH), 2-phenylethanol (PheOH), and tryptophol (TrpOH). Immobilization of the yeast, such as in a porous bead or pellet, can further increase yield. Exemplary immobilization included immobilization in calcium alginate beads. The system and methods taught herein demonstrate that product yield such as ethanol yield can be improved by adding yeast yield-increasing/growth-inhibitory molecules to reduce cell growth of yeast species, such as S. cerevisiae, suggesting a strategy to improve the yield of ethanol and other yeast fermentation products by manipulating native biological control systems.

Abstract: The present disclosure relates generally to the materials and methods involving biosensing systems. More specifically, the present disclosure relates to biosensors for making real-time, continuous, and quantitative assessments of analyte concentrations in aqueous environments using oxidases. The present disclosure addresses the need for improved methods and systems for making quantitative assessments of various analytes in a continuous and real-time manner, without the need for expensive and time-consuming laboratory processing.