A non-linear post-processor for estimating at least one source of signal-dependent noise is disclosed. The coated, tapered electrode acts as a mask for a self-aligned trench etch to electrically separate adjacent wordlines. The process of the present invention also extends to a partial purification of the crude aqueous extract produced by the technique of adsorption on macroporous resins, resulting in higher purity extract of antioxidants. The less polar than water liquid and any remaining water are drained from the fibrils. The modular heated covers are grounded for safety using the conductive heat spreading layer.