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© IRL Press Limited

A BASIC program for the removal of noise from reaction traces using Fourier filtering

T. Brittain

Department of Biochemistry, University of Auckland Auckland, New Zealand

Software for the removal of noise from reaction curves using the principle of Fourier filtering has been written in BASIC to execute on a PC. The program inputs reaction traces which are subjected to a rotation -inversion process, to produce functions suitable for Fourier analysis. Fourier transformation into the frequency domain is followed by multiplication of the transform by a rectangular filter function, to remove the noise frequencies. Inverse transformation then yields a noise-reduced reaction trace suitable for further analysis. The program is interactive at each stage and could easily be modified to remove noise from a range of input data types.

Received on October 20, 1988; accepted on January 10, 1989

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