Bronnen:
![Foto](/uploads/1/5/5/8/15584420/3202438.jpg?340)
http://www.schooltv.nl/beeldbank/clip/20070221_steriliseren01
http://www.technopolis.be/nl/index.php?n=4&e=360&s=364&exp=509&PHPSESSID=3a4cb
http://www.medirecord.eu/micro/bacterie/index.htm
http://www.microbiologie.info/sporen.htm
https://www.google.be/search?q=bacterie&oe=utf-8&aq=t&rls=org.mozilla:nl:official&client=firefox-a&um=1&ie=UTF-8&hl=nl&tbm=isch&source=og&sa=N&tab=wi&ei=nWHHUJEmhJnRBZPDgJAK&biw=1266&bih=602&sei=oWHHUInqMvCq0AWtwIDACA
http://home.hccnet.nl/henk.dewit/bacterien.htm
http://nl.wikipedia.org/wiki/Prote%C3%AFne
http://www.food-info.net/nl/national/verslag-wei.htm
http://www.ikhebeenvraag.be/vraag/26229http://home.hccnet.nl/henk.dewit/bacterien.htm
http://bi-safe.be/site/node/16
http://home.hccnet.nl/henk.dewit/bacterien.htm
http://passie.horeca.nl/fav/Conserveringstechnieken.pdf
http://www.technopolis.be/nl/index.php?n=4&e=360&s=364&exp=509&PHPSESSID=3a4cb
http://www.medirecord.eu/micro/bacterie/index.htm
http://www.microbiologie.info/sporen.htm
https://www.google.be/search?q=bacterie&oe=utf-8&aq=t&rls=org.mozilla:nl:official&client=firefox-a&um=1&ie=UTF-8&hl=nl&tbm=isch&source=og&sa=N&tab=wi&ei=nWHHUJEmhJnRBZPDgJAK&biw=1266&bih=602&sei=oWHHUInqMvCq0AWtwIDACA
http://home.hccnet.nl/henk.dewit/bacterien.htm
http://nl.wikipedia.org/wiki/Prote%C3%AFne
http://www.food-info.net/nl/national/verslag-wei.htm
http://www.ikhebeenvraag.be/vraag/26229http://home.hccnet.nl/henk.dewit/bacterien.htm
http://bi-safe.be/site/node/16
http://home.hccnet.nl/henk.dewit/bacterien.htm
http://passie.horeca.nl/fav/Conserveringstechnieken.pdf