My full name is Donald J Dahm. I was born in 1941, in a farmhouse in rural Iowa, USA.
I received a PhD in physical chemistry from Iowa State University in 1968. I was able to "sit out" the Viet Nam war by spending half time for 18 months working at a Nuclear Research reactor while I was pursuing the degree.
Early in my career, I spend 24 years at a major chemical company, doing everything from being a bench analyst to the assistant vice president of technology. Later I spent 13 years as a chemistry professor at Rowan University.
Between the two, I became enmeshed in the theory of diffuse reflectance, and some of the controversies surrounding it. I was able to throw some light on the problem, and developed the "Dahm equation" as part of the "solution".
I first became interested in Wikipedia because it contained information from a broad range of application fields for our work. My first submission was a definition of "Remission" as it applies to Spectroscopy. Since then I has written or expanded several articles.
I try to confine my activity on Wikipedia to areas where I am a legitimate expert, but welcome being challenged. It's the way Science is supposed to work.