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Smurf real estate agent Reged: 04/30/13 Posts: 61889 Loc: Milky way |
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Quote: workman 1999 Quote: Agar-Agar is a gel forming ingredient, extracted from seaweed, that is used to make petri dish media. You could use gelatin but mycelium will digest gelatin and you'll be left with a useless goopy mess. Agar-Agar enables mycelium to grow on a solid plate surface so that you can cut wedges out, and use them to inoculate things. The solid 2-dimensional media also makes for good visual indication that your culture is either clean or not clean. Agar being on a 2d surface, rather than 3d(cake or grain jar) or in liquid, allows for easy salvaging of most contamination problems before it's ever a problem. In some cases, if a contaminant appears on a dish, you can re-capture mycelium. Then use that clean wedge to create a new 100% clean dish, and entirely save a culture. Agar-Agar itself is not nutritious. This is confusing as "agar" refers to the ingredient in "agar". Agar sometimes means the whole media prepared with agar(the gel forming powder) and then nutrition and water. So from here on I will use A-A when I mean agar-agar the non nutritious powder this stuff and I'll use agar, when I mean the stuff that you pour into the dishes that mycelium will grow on. Agar is useful for germination of spores. Spore syringes are inherently not 100% clean, this means if you inject spores into a jar, PF cake, grain spawn, LC, etc.... it has a chance of germinating a contamination. On agar you will soon see you can obtain clean mycelium from a spore syringe. This isn't to say you'll never have success using spores to directly inoculate, but using agar first will make sure you don't waist your time. This is a natural step for any serious cultivator Agar is also, basically, a must for cloning mushrooms. And agar is a tool for the cultivator to store cultures long term.
How to make Agar and Petri Dishes I personally like to use, in give or take this order
To make the best agar I like to add all the dry ingredients into a media bottle these are 500mL pyrex media bottles, they're made for agar, they're about 15 dollars shipped, and they're the only bottle I will personally use for agar. Completely unmodified as is these are bar none the best vessel for pour agar. These bottles have a removable polypropylene(PP/recycling code 5 plastic) ring at the lip of the bottle so agar doesn't dribble down the side of the bottle. the lids are replaceable and the rings are replaceable too and both easily found for sale. (search: GL45 caps/rings) after the dry ingredients are added I fill with room temperature tap water until I reach a hair over 400mL in volume That's enough for 20 plates, a sleeve of 100x15mm dishes put the cap on and shake, then into the microwave with the cap very loose bring to a boil. careful don't let it boil over and make a fucking huge mess. I find it best to not walk away during this step, just keep an eye on it. after you hit a boil put the cap on tight and give it a shake again. Some recipes like BRF agar will have sediment issues, I just don't care. MEA and grain soak water will be pristinely clear. slightly loosen the cap and cover with foil. then place into your pressure cooker, I like to make the water in the PC come up to the level of the agar in the bottle. this will make it take longer to hit pressure and cool down but will cut down on boil over. Sterilize at 15PSI for 20m. agar is sterilized in 20m at 15psi. I always usually go to 20m I would not go longer than 30-45m you risk caremelization of sugars in your media. IF you have sediment in your media you may need to use the 30-45m time frame. IF you filter or have completely clear, dissolved media then 20m should be be sufficient *** If you don't have a pressure cooker agar media can be sterilized by steam alone, steam your agar bottle like you would a PF jar for no less than 45 minutes. Not having a PC/autoclave is no reason to avoid agar. Although I HIGHLY recommend using a PC for agar. And in general do not suggest doing agar without a PC *** after the pressure drops to 0 you can remove the lid of your PC and tighten down the cap on the bottle and take the foil off. At this point you can store the bottle in the fridge to use later or start to bring it down to pour temperature. if you store the bottle in the fridge all you have to do to use it again is microwave it until it's liquid again. don't try to microwave it on high for 8 minutes. do a few minutes then shake, then a few more then shake. Solid half melted fully melted thanks microwave you have to cool it down to pour it without burning your hand, but how cool is too cool before it turns into a solid again? Quote: I find it starts to gel back up at about 42C(107F) most of the time at the gel strength used for plates. At 47C(117f) you can pour a whole sleeve of plates before it gels up on you. and pouring at as low of a temperature as possible minimizes condensation a lot. to get agar to melt again you have to go all the way back up to 85C(185F), once it is gel simply heating it 47+(117+F) won't melt it, you have to get it all the way back up to 85C(185F). Using more or less A-A in your recipe will make these temperatures and the stiffness of the agar plates a little bit different. How to get your agar to 47C(117F) to make it ready to pour. the water bath every real lab will have a water bath that can be set to 47C to keep agar liquid and ready to pour. As well it can cool down hot agar from the sterilizer or microwave. They're expensive so this is how to do it at home Fill a Tupperware with hot water (must be at least 120F) put your agar bottle in the hot water so that the water is level with the agar inside the bottle the water in the tupperware will heat up as the bottle cools down, when the water in the bath once again has cooled down to 120F you can assume the bottle is now also at 120F and ready to pour. you can also do it in your PC add some cool water till the temperature reaches 150F or so then wait until the thermometer hits 120F or so alternatively you can buy an infrared thermometer to check as well Quote: when you pour your agar at as near the temperature it starts to solidify you minimize condensation, if you pour your agar at 140F when you can handle the bottle but it's still a bit too warm you will end up with condensation Take your cooled bottle of agar over to your work area A SAB in my case you can do this at home without fancy equipment in one of these(four examples) ONE TWO THREE FOUR(my favorite one) don't let the size of tubs be a limitation, build one from something else if you want a big roomy SAB you can have one. pour your plates. use your wrist, don't let your hand ever go above anything sterile. this isn't a sterile technique TEK but make sure to use good technique. Pour from the bottom up, make smaller stacks of 5-10 high. if you have leftover agar put the cap back on, make sure you don't contaminate your cap when you pour. I put mine on a piece of foil if you pour your dishes correctly at the low temperature you'll end up with something like this near the top of the stack you might get a few dishes with some condensation, I actually like to pour stacks tall, so I do them 10 high, if you do a bunch of short stacks you get a bunch of dishes with a little bit of condensation if you do a stack of 10 you get 7-8 perfect dishes and 2 you may have to fix. how do you fix them? use a cup with warm water and a flat bottom, put it on top of the dish for a few seconds-minutes (wont hurt if the water is warm-hot) and boom your dishes are crystal clear again. You can fit all 20 back in and take it up, store in the fridge. I don't bother wrapping them at this stage. Glass petri dishes, Pyrex or Flint glass and re-use/sterilization Pyrex dishes withstand dry heat and steam sterilization for the most part indefinitely they cost more than flint glass dishes that might not take extremes forever and also is inherently more fragile these dishes are borosilicate ie pyrex https://en.wikipedia.org/wiki/Dr technically your glass dishes should be surgically clean before sterilization in an autoclave or oven. That way the sterilization actually sterilizes the glass not the debris on the glass and the glass. steam sterilization is just fine but we have pressure cookers not autoclaves. you can run a dry cycle on an autoclave and it pumps the chamber to a vacuum and sucks the water out of the chamber and leaves tubes,instruments,tools,lab clothes,petri dishes dry when you take them out. We don't have fancy autoclave bags either so we wrap things in foil. when you take foil wrapped glass dishes out of your PC the foil is going to be wet and I find it nicer to have everything including the package the dishes in dry so wrapping them in foil and baking them is preferred. That concludes the making of agar and making of petri dishes part of the TEK. now let's see what can be done with the poured dishes. Using agar dishes you may notice I don't use parafilm very often, I prefer saran wrap myself, you can use either or. to use saran wrap take the whole roll out of the carton. and cut the roll into one inch wide mini rolls. use each mini roll to make at least two revolutions around the dish and pull it to snap it off which will make a nice seal. When you unwrap the dishes the saran wrap makes a good surface to put in between two dishes so that they don't slide around on each other as much. Saran wrap is quicker for me, I don't have to pre-prepare cutouts of it like parafilm aside from the original making of the mini rolls. It's also quite a bit less expensive. although parafilm works out to be very cheap per dish anyway. How I wrap my dishes Video Munchauzen's cultivation and sterile technique videos if you are uncomfortable with sterile technique these videos should help tremendously. I won't cover agar to agar transfers in this TEK as it's better covered by sterile technique TEKs than an agar TEK you can inoculate with a spore syringe by placing a drop in the center of the dish or by making a streak plate here's just drops on a plate, germination occurs all over the plate spore syringes are inherently not 100% clean a more fool proof technique to ensure success is to properly plate the spores a streak plate Quote: thanks enlightenment these are awesome as fuck here's how I do it from start to finish my DIY Inoculation Loop TEK Have a sterilized shot glass or a blank petri dish(inside is sterile still) flame your needle on the spore syringe then move into the SAB squirt out a drop to cool the needle and then squirt a little bit into your dish take your inoculation loop (I use disposable plastic ones) otherwise flame it bring into the SAB then dip in agar(if flamed) then dip in the spore solution in the dish then make a Z pattern on the dish with the inoculation loop remember in a SAB no hands above sterile surfaces. only sterile things above sterile surfaces. then repeat as needed. I usually do about 5-10 dishes with spores to ensure something viable comes. once spores germinate you should take a transfer to another dish video 3 here There may be more than one way to skin a cat, but when it comes to cloning the only right way to do it is with agar. Like all things in this hobby there's more ways than one to get away with things. People have used the 9er tek and many other techniques to clone without agar. I'm going to tell you they all suck ass, the only right way to clone is with agar ![]() Agar is entirely too easy, cheap, and reliable to spend your time trying to do tissue cultures any other failure ridden way. frank's proper cloning TEK also covered in let's grow mushrooms by RR My favorite way to clone is to wait for a dish to pin a little too mature ![]() more like this and move those pins to agar like the pictures above. the little pins grow very quickly and vigorously, the pins from another petri dish are going to have no contamination on them so cloning is even easier than taking a biopsy from a fruit growing in a tub. Biopsy clones are perfectly fine too. if you leave a dish about 6-8 weeks usually it will start to knot/pin and then a few more days and you'll have a pin to clone. Many people get overly concerned with finding an isolate. Many isolates suck. any two spores that successfully mate make a strain. thus with spores on a petri dish Quote: https://www.shroomery.org/forums also there's this thread STRO's cleaning and isolating on agar TEK so you see a clone has proven it's potential by growing, with isolates your going blind you need to test every isolate, some will suck here's a good example https://www.shroomery.org/forums Also a lot of noobs worry about rhizomorphic growth. Worry about healthy growth. you do not know if rhizomorphic growth will be any good till you test it. so tomentose growth may be a better fruiter or more potent, you won't know so don't concentrate on only rhizomorphic mycelium on dishes. people get strains and varieties confused A variety is a name on a syringe A strain is two spores that have mated together B+, GT, Cambo, Creeper, Penis Envy, KSSS, AA+, or any variety can grow weak, strong, tall, short, retarded, fast, etc... B+(variety) is basically a mom and a dad(the name itself is the parent) and every time you squirt B+ into a jar they the name on the syringe has sex and has kids. your jars have 100s of kids your b+ parents made. Some of those kids are awesome some are stupid. Each of those kids is a strain. workman clears up how varieties are made isolates of leuistic orissa India psilocybe cubensis Quote: Yes it's that fucking easy folks. if you're going to inoculate agar is the way to go. from spawn to LC if you want to make sure it's clean and you're not rolling the dice you need to work with agar inoculations. inoculation of spawn with wedges sometimes you lose your blade ![]() inoculation of LC with agar wedges agar dishes can be stored in a regular refrigerator for extended periods of times, longer than a couple years. For best results you will want a dedicated refrigerator set at ~35-37F right above freezing A dedicated refrigerator solves the temperature swing problem since it's not opened and closed but a few times a year. if you must use a refrigerator that does get regular openings then the best way to ensure your dishes stay good is to put them into zip lock bags, preferably individually. then put them into an insulated lunch box to hold the temperature, fill any void space with ice packs to act as a thermal capacitor which buffers against temperature swings. any insulation you can the better. the dishes can be stored for years but it's best to make transfers to new dishes at least once a year, take a small rice sized grain from the master plate and put it to a new plate let it colonize the plate nearly completely then put it to refrigeration, this way you can keep your clone cultures or isolates for decades without worrying about senescence occurring. you may also refrigerate slants which are another technique of using agar for long term storage. here's more on that did you know 70% alcohol sanitizes better than 90+ or higher concentrations more info about that here
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