Sterilization and Pasteurization

Documents:

• Correct pressure cooker use
  • 4.75
  
  
  Pressure cookers and canner are important tools in mycological work.
  
  
• Sterilization Tips
  • 3.00
  
  
  A few tips on how you can avoid contamination by increasing your sterilization procedures by Ryche Hawk.
  
  
• Why do I need 15psi when pressure cooking?
  
  The reason for it is that at a pressure of 15 PSI (pound per square inch) water boils at a higher temperature (250°F, 121°C) than at ambient pressure.
  
  
• What is the difference between pasteurization and sterilization of casings and substrates?
  • 4.00
  
  
  The pasteurization is carried out for a prolonged time at around 170°F and is supposed to kill only heat susceptible organisms and their spores, while sterilization works at a temperature of 250°F and is supposed to kill all organisms.
  
  
• What is "fractional sterilization" or tyndallization?
  • 4.50
  
  
  Fractional sterilization or tyndallization is a method used to destroy bacteria and endospores in preparation of grain spawn(rye, wheat, millet, birdseed.
  
  
• How long will pasteurized bulk substrate last if I don't inoculate it right away?
  • 5.00
  
  
  By pasteurizing many bacteria and some molds still survive in the substrate.
  
  
• How do I pasteurize casing material in the microwave?
  • 4.00
  
  
  Using the microwave oven for pasteurisation of casings or dung substrates is effective and easy.
  
  
• Kill 'Em All!
  • 1.00
  
  
  A method for insuring the eradication of unwanted bacteria and foreign spores. Good pre-sterilization method.
  
  
• What is a good way to pasteurize straw and dung?
  • 5.00
  
  
  Put the straw and/or dung into a pillow case, submerge in pot with water with a weight on top at 170°F for one hour.
  
  
• Can I stack jars in the pot or in the pressure cooker?
  
  There is no problem with stacking the jars in the pot or in the pressure cooker, as long there is a lid on the pot.
  
  
• Oven-Bag Pasteurization Pictorial
  • 4.00
  
  
  A great way for the pasteurization of straw/compost/dung.
  
  
• oldimages/sterile-altitude.gif
  
  Here's a chart to help you determine the PSI required to sterilize materials at certain altitudes.
  
  
• Home Made Alcohol Lamp
  • 4.33
  
  
  Build your own alcohol lamp from easily available materials.
  
  
• Sterilize water before dunking?
  
  Do you have to sterilize the water before you dunk your cakes?
  
  
• Cybers How to build a bulk steam pasteurizing unit
  • 4.50
  
  
  Steam Pasteurization
  
  
• Pressure Cooker Instructions
  
  Rules preclude me from scanning the instruction booklet, (wish I knew this 45 min. ago), but I found this link for all you used weight-type PC buyers out there.
  
  
• Tyndallization
  • 5.00
  
  
  How to Sterilize without a pressure cooker