He made everything - except coffee - from sourdough, a substance used in making sourdough bread.

VOA: special.2009.01.24

So he called the substance a "vitamine" -- an amine necessary for life.

VOA: special.2010.09.14

Funk was not able to separate the anti-berberi substance from the rice hulls;

VOA: special.2009.04.21

a small amount of fertilizer and dolomite, a powder-like substance made from limestone.

VOA: special.2011.06.14

It is also needed to make a light-sensitive substance in the eyes.

VOA: special.2009.04.21

There you can actually do sort of substance analysis which you can't really do by conventional x-ray."

VOA: standard.2010.05.05

"Basically,it's an underwater balloon. You've got two parts to it: You've got the balloon here - which is this long cylindrical object - and that's filled with a lighter-than-water substance, which is aviation gasoline."

VOA: standard.2010.06.21