About the Authors

Bruce E. Kurtz

kurtz36ti@gmail.com

Affiliation Independent consultant, Bradenton, Florida, United States of America

Competing Interests

Bruce E. Kurtz is now retired by a commercial company “Electronic Materials, National Starch and Chemical, Imperial Chemical Industries (ICI)”. This does not alter the author’s adherence to all PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: BEK. Performed the experiments: BEK. Analyzed the data: BEK. Contributed reagents/materials/analysis tools: BEK. Wrote the paper: BEK.