This is an interesting experiment. As for the difference in the amount of mould that grew in the two types of breads that you observed, it's possible that the difference is not significant. Also, since your inoculum (i.e., airborne spores) was not standardized (in terms of amount and types of mould), it's hard to explain the results. For example, if one piece of bread had say Rhizopus and the other piece had Penicillium, the piece with Rhizopus could appear to have more mould than the piece with Penicillium.
> Date: Sat, 9 May 2009 12:04:17 -0500
> From:
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> Subject: Mycology Digest, Vol 47, Issue 1
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> Today's Topics:
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> 1. Bread Mold (Catharine McPherson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 7 May 2009 15:21:02 -0700
> From: "Catharine McPherson" <
cathmcp@...>
> Subject: [Mycology] Bread Mold
> To: <
mycology@...>
> Message-ID: <001801c9cf62$1ba606e0$52f214a0$@net>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello,
>
>
>
> My name is Gwyneth and I live south of Vancouver B.C., just north of
> Washington State.
>
> I am in Grade 6 and preparing my Science Fair project on some bread mold I
> am testing. I thought that organic bread would grow more mold than non
> organic bread and grow mold sooner. I decided to bake my own bread by using
> the same ingredients except for the flour. One recipe I used organic all
> purpose flour and in the other I used regular all purpose flour.
>
> I then cut equal sized samples and placed one of each in different areas
> around my house:
>
> The windowsill, the bathroom, the refrigerator, on top of the refrigerator
> and under a dark cabinet in an envelope away from a heat source.
>
> I checked on all of my samples for over 20 days and found that the non
> organic bread grew slightly more mold and grew it faster than the organic
> samples. I was surprised since I thought the organic sample would do this
> first.
>
> The second thing I did was test the two flours just mixed with water and the
> results were the other way around where the organic sample grew mold first.
> However, the non organic mold seemed to spread much more and produce more
> results than the organic.
>
>
>
> Now I am perplexed as to why I got two different results.
>
>
>
> I tested the ph and both seem to be the same.
>
> Ideas?
>
>
>
> Thanks
>
> Gwyneth
>
> P.S. my science fair is on Saturday but if you can't get back to me before
> than that is alright.
>
>
>
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> End of Mycology Digest, Vol 47, Issue 1
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