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OfflineHammerloaf
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Registered: 11/26/01
Posts: 439
Loc: Canada
Last seen: 20 years, 10 months
ATTN: Anno! (Re: Sterilizing Rye Berries w/o a PC)
    #551397 - 02/14/02 02:42 PM (22 years, 4 months ago)

Dear Anno..

You suggested something a while back that totally rocked my PC-less world.. that it is possible to use rye berries (or whole grains) without a PC... through multiple boiling cycles, to allow for endospores to germinate... hmm.. I wonder do you have more details, such as ratios of rye berries vs. water.. and does it require 3 boilings just to be sure, or would 2 suffice?

This could be the breakthrough of the century!
:smile: 

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OfflineAnnoA
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ATTN: Anno! (Re: Sterilizing Rye Berries w/o a PC) [Re: Hammerloaf]
    #551482 - 02/14/02 03:37 PM (22 years, 4 months ago)

I tried this with a standard rye recipe(100g rye and 105 g water per pint jar).

I cooked it twice for 30 minutes and the 3rd time for 45 minutes just to go sure and it worked.

There has to be a pause of 1 day between each boiling.

Tyndallization(fractional sterilisation) process

1) Steam heating to 90-100 ?Cfor30 min
Vegetative cells are destroyed but endospores survive

2) Incubate at 37 ?C overnight
Most spores germinate

3) Second heat treatment 90-100 ?C, 30 min
Germinated spores are killed

4) Second incubation at 37 ?C overnight
Remaining spores germinate

5) Third heat treatment
Germinated spores are killed

Edited by Anno (02/14/02 04:22 PM)

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OfflineAnnoA
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Registered: 06/17/99
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ATTN: Anno! (Re: Sterilizing Rye Berries w/o a PC) [Re: Hammerloaf]
    #551489 - 02/14/02 03:40 PM (22 years, 4 months ago)

BTW:
I just looked at Ebay, there are so many cheap pressure cookers on sale.....

http://search.ebay.com/search/search.dll?MfcISAPICommand=GetResult&ht=1&SortProperty=MetaEndSort&query=pressure+cooker 

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OfflineHammerloaf
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Registered: 11/26/01
Posts: 439
Loc: Canada
Last seen: 20 years, 10 months
ATTN: Anno! (Re: Sterilizing Rye Berries w/o a PC) [Re: Anno]
    #552588 - 02/15/02 01:02 PM (22 years, 4 months ago)

Thanks for the info Anno, much appreciated!!

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