Abstract: An implantable chemical sensor system for medical applications is described which permits selective recognition of an analyte using an expandable biocompatible sensor, such as a polymer, that undergoes a dimensional change in the presence of the analyte. The expandable polymer is incorporated into an electronic circuit component that changes its properties (e.g., frequency) when the polymer changes dimension. As the circuit changes its characteristics, an external interrogator transmits a signal transdermally to the transducer, and the concentration of the analyte is determined from the measured changes in the circuit. This invention may be used for minimally invasive monitoring of blood glucose levels in diabetic patients.

Abstract: Methods are provided for the determination of the concentration of biological levels of polyhydroxylated compounds, particularly glucose. The methods utilize an amplification system that is an analyte transducer immobilized in a polymeric matrix, where the system is implantable and biocompatible. Upon interrogation by an optical system, the amplification system produces a signal capable of detection external to the skin of the patient. Quantitation of the analyte of interest is achieved by measurement of the emitted signal.

Abstract: A method for reducing color impurities in sugar-containing syrups. First, hydrogen peroxide is added to the syrup and mixed with it. Following that, a suitable cationic surfactant is added, ahd there is further mixing. After that, a suitable defecant is added, such as a mixture of calcium chloride and sodium carbonate, which react with each other to form calcium carbonate in the sugar solution. Activated vegetable carbon and diatomaceous earth are added and mixed. Then the solids are filtered out to obtain a purified sugar solution which may be used directly or may be inverted, as by conventional acid treatment, and then used.