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The Launch of SPI! Earth Day at AZ Science Center

April 2, 2010

The pieces are falling into place for the official public launch of the Sustainable P Initiative.  It will take place on Thursday 22 April – Earth Day!  We’ve arranged for the Arizona Science Center as a venue.  The event will include a ~30 min talk by me (“Phosphorus, Food, and Our Future”) followed by an “info mixer” in which all attendees will be able to meet the scientists involved in SPI and ask questions and offer ideas.  And, of course, there will be refreshments!  Did I mention a free “Save the P(ee)!” or “P is for People!” button or fridge magnet for each attendee!

Doors open at 6:30 PM.  Talk starts at 7.  And admission is free.  RSVP (required) to Margaret Coulombe (

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2 Comments leave one →
  1. April 23, 2010 7:09 pm

    Great event last night, Jim etc al! So, is P present in elevated concentrations in ALL animal pee or just humans and other mammals? Interestingly evolutionary implications……

  2. April 23, 2010 9:42 pm

    Hi Jenn.
    P is concentrated in the urine of humans largely because we have a high-P diet. It’s a matter of mass balance to a large degree – what goes in, must come out (in urine or feces). However, there are a number of complex aspects of phosphate homeostasis in humans (and other “higher” vertebrates), as this is the outcome of mechanisms that assimilate P from the food and use it to maintain and construct bones and maintain serum phosphate at appropriate levels. Much of this regulation takes place in the kidney. In sum, we turnover the P in our bodies, and it leaks out. So, inevitably our urine will have a fair amount of P in it.

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