The present invention relates to enzymic processes for preparing S-butan-2-ol; and to enzymes for carrying out said processes; to nucleic acid sequences coding for said enzymes, to expression cassettes, vectors and recombinant hosts containing said nucleic acid sequences. The system may include a communication unit and a processing unit. A groove is then patterned in the substrate utilizing a portion of the plurality of top level conductive features as an etch mask and one of the plurality of buried conductive features as an etch stop. The waterborne polymer compositions of the invention are particularly useful in a variety of adhesive formulations such as pressure sensitive adhesives, laminating adhesives, and the like. The second conductor loop includes of a series of partial loops that extend parallel to one another.