On Mon, 29 Jan 2001 12:12:27 -0600, william schnell <[log in to unmask]> wrote: >About the nitric acid, see >http://www.gfhnrc.ars.usda.gov/news/nws9903a.htm All usda.gov sites reply with "server not found"...?? Have they quit the service? Unfortunately i didn't download the files mentioned by Norm,who wrote: >I'm using the USDA database in Microsoft Access format. It can be > downloaded for free from the USDA website ... > http://www.nal.usda.gov/fnic/foodcomp/Data/SR13/dnload/sr13dnld.html You wrote about zinc: >Also, the zinc _must_ be in proportion with copper (~7:1), lest one >suffer zinc poisoning/copper deficiency which results in irregular >heartbeat and/or 13 other listed nasty problems. So we have to consider proper relations of copper too. You say the relation must be about 7:1. Which deviation if this are usual? In which food items? Should/can zinc or copper be higher? I would suggest a USDA database scan, sorted by relation of zinc to copper. So we could select out food items with unfavourable ratios. Norm, could you run such one? Cheers, Amadeus