RE: Things that glow
08-31-2012 7:56 PM
I got one at a yard sale for a song, one big enough to hold 10 full-size mason jars deal with decent seals but no wire lifter rack. Probably very dangerous as there is no way to know if the pressure gauge is accurate or if the emergency pressure release valve works...
A new one isn't cheap, but DIY sterile technique is reasonable easy if you are willing to sit, watch, wait, and calibrate the stove temperature with the pressure release valve to keep it at proper temp long enough.
I used aluminum foil to cover the jars containing a mixture of uncooked rye and some other nutrients to be the growing medium for my spore prints, and I had some agar-based plates wrapped around with parafilm that I sterilzed to get the spore prints started with a fairly generic mixture I cooked up (with aluminum foil over the mouth of the beaker it was cooking in).
Once the jars were strerilized they could pretty much just sit out since they were covered - most contaminants fall from the air covering is most important.
For innoculation I rigged up a positive-air pressure hood with window screen frames (six frames taped together) and taped clear sheet plastic around the inside to make the hood. A couple of slits in the front to allow me to put stuff and my hands inside were enough of a working opening. I rigged a squirrelcage fan from a junk shop with an air filter over the air intake and sprayed the shit out of its insides with lysol to kill any lurking microbes. A couple of pieces of plastic formed into a tube and duct tape made the air intake to inflate the hood. Had to cut some slits in the tube since I had no way to regulate the speed of the fan - a rheostat like the kind for electric trains would have probably worked as long as it was DC in and out.
I wore rubber gloves and had a can of lysol inside the hood so I could sterilize the working surfaces and interior, then I brought the jars, plates, and spore prints into the hood and re-sterilized the outside of everything with lysol.
I had an alcohol burner and an innoculating loop (thin wire on a metal shaft) that was flamed, scratched on the spores, swiped on the medium. Keeping the plates closed as much as possible is critical. I put a strip of parafilm around the agar plates to keep airborne contaminants out after innoculation.
Some of the plates took, others did nothing, some grew contaminants of various colors - the spore prints themselves were most likely rife with microbes.
The ones that took and were clean were cut into sections and placed into the grain jars. Some took, some didn't, some became contaminated. It's a numbers game so I only used a few of the good plates - it only takes a small chunk to populate a whole jar within a couple of weeks.
Once the jars were going they were kept in a sterilized cooler that had sterilized water covered with a sterilized paper towel over it to keep the chamber moist.
Your interest would probably diverge at this point where you would put something that was growing nicely on a decorative growing surface like a terrarium log or aquarium reef thing, filling a hole with innoculated growing medium and keeping it moist.
There are probably much easier ways but since I was working on a bioscience farm at the time I did sterile technique every day and wanted to see how homebrew approaches would work, and it wasn't very hard at all.
A lot of the stuff you are looking at would most likely do fine being handled with sterilized tools and surfaces (lysol) as long as the sanitizer didn't hang around to kill the stuff you want to grow, and you could probably dispense with the positive airflow hood. If you want to grow in a sterile medium, the pressure cooker would be great, since you can cook roast and other food very quickly when you up the pressure, and some love canning stuff as well!
Enjoy! This may be my longest post in months!
Fun Kit
Alpha Dream - L2K, Fast Burn & Slow Burn Glace, Alfa Maschio, Androstadienone, Pregnenolone
Luv Essentials - MAG, Aware
HAX - Wingman Element X, Wingman Element 9+O
True Pheromones - True Alpha oil, True Instinct oil, True Love, The Gilroy patches
Homebrew - D3, Pregnenolone, 7-Keto DHEA
|