Abstract: A composition or article that includes a first silica-matrix encapsulated biomaterial, the first silica-matrix encapsulated biomaterial including a first silica matrix and a first biomaterial; and a second silica-matrix encapsulated biomaterial, the second silica-matrix encapsulated biomaterial including a second silica matrix and a second biomaterial, wherein the first silica-matrix encapsulated biomaterial has at least one property that is different than that of the second silica-matrix encapsulated biomaterial, and wherein the first silica-matrix encapsulated biomaterial forms a first layer and the second silica-matrix encapsulated biomaterial forms a second layer, and the first layer is positioned adjacent the second layer.

Abstract: This disclosure describes compositions, devices, and methods relating to removal of cyanuric acid from a sample. Generally, the compositions include a cell that expresses at least one enzyme that degrades cyanuric acid and a matrix material that covers at least a portion of the cell. Generally, the methods include contacting the sample with the composition, or a device that includes the composition, and allowing the enzyme of the composition to degrade cyanuric acid in the sample.