The present invention relates to a polymer supported reagent comprising a novel crosslinked mesoporous polymer, enabling a simple and easy production of an azoxy compound or an azo compound from an aromatic nitro compound, and a method of selectively reducing an aromatic nitro compound by using the same. A flow sensor control is configured to generate a signal indicative of the rate of aspirated fluid flow. The method includes programming a reference cell to a Vt level at least as great as an uppermost Vt level of the number of different Vt levels, performing a read operation on the reference cell, and determining a number of read reference voltages used to determine a particular program state of the memory cell based on the read operation performed on the reference cell. The organization is defined by a data organization definition that specifies tables, their columns, and the relationships between tables. If the matrix is not present, the matrix is initialized based on the stored information of the header vehicle.