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Offlinethe man
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UVa /UVB
    #2049028 - 10/28/03 12:46 AM (13 years, 1 month ago)

exposing a casing or cakes to that radiation. woudl it be a good idea. or to do teh whoel procedure under a light liek that? i dunno was jsut thinking taht it could work really well for cantams.

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InvisibleSixCee
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Re: UVa /UVB [Re: the man]
    #2049039 - 10/28/03 12:49 AM (13 years, 1 month ago)

Do you think it owuld have any adverse affects on the mycelium itself?


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OfflineExtravagantDream
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Re: UVa /UVB [Re: SixCee]
    #2049079 - 10/28/03 12:57 AM (13 years, 1 month ago)

indeed it would. Deformaties to say the least, and I'm not talking the regular deformaties.


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Offlinethe man
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Re: UVa /UVB [Re: ExtravagantDream]
    #2049087 - 10/28/03 01:00 AM (13 years, 1 month ago)

hmm the sun would give off teh smae radiation. lots of deformaties when grown outside?

most syringes are probably done in a flow hood which has a UVA/UVB bulb.

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And Moses Said "Let my mushrooms grow!"


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Invisibletheshiftingwalls
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Re: UVa /UVB [Re: the man]
    #2049091 - 10/28/03 01:02 AM (13 years, 1 month ago)

Look dude.. Its not good... UVC is bad mkay.


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Offlinethe man
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Re: UVa /UVB [Re: theshiftingwalls]
    #2049123 - 10/28/03 01:11 AM (13 years, 1 month ago)

why do u think? it kills alot of cantams. it occurs in nature what would be teh difference man. espessially in equadorial countries which will get even more UV than the bulb will produce.


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InvisibleMycomancer
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Re: UVa /UVB [Re: the man]
    #2049167 - 10/28/03 01:20 AM (13 years, 1 month ago)

According to Stamets, UV radiation appears to degrade psilocybin content within the mushroom.

"...Mushrooms grown indoors seem consistently more potent than field-collected specimens, probably due to nutritional factors (percursors) and protection from the damaging effects of ultraviolet radiation." --Paul Stamets
Psilocybin Mushrooms of the World

Also the kind of UV you would need in consideration of contams is UV-C
Short wavelength UV-C is almost completely absorbed in air within a few hundred meters. When UV-C photons collide with oxygen atoms, the energy exchange causes the formation of ozone. UV-C is almost never observed in nature, since it is absorbed so quickly. Plus it's not good for people to be around at all.

mycomancer


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Offlinethe man
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Re: UVa /UVB [Re: Mycomancer]
    #2049260 - 10/28/03 01:44 AM (13 years, 1 month ago)

ok. but uvb does kill contams.

but those guys thought it would cause mutations and stuff. that didtn make any sense.

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InvisibleHanky
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Re: UVa /UVB [Re: the man]
    #2049443 - 10/28/03 02:36 AM (13 years, 1 month ago)

it does cause mutations,i read recently that the original pf strain was affected until the source of the mutations was traced to blacklights in the grow rooms.


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Offlinethe man
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Re: UVa /UVB [Re: Hanky]
    #2049453 - 10/28/03 02:39 AM (13 years, 1 month ago)

hmm thats strange. black lights dont emit any UVB at all. and UVA comes from most bulbs. i dunno u guys i just want to find a answer here. myabe its just to good to be true

can i get a link?

peace


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InvisiblePJDIDDLE
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Re: UVa /UVB *DELETED* [Re: the man]
    #2049716 - 10/28/03 05:35 AM (13 years, 1 month ago)

Post deleted by Script

Reason for deletion: .



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Offlinethe man
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Re: UVa /UVB [Re: PJDIDDLE] * 1
    #2050312 - 10/28/03 01:30 PM (13 years, 1 month ago)

im nto talkign about uvc. UVB rays are why u can grow outdoors with less chance of contams then indoors. UVB bulbs are made out of Quartz unlike blacklights. UVB canot go through any amoutn of glass or plastic. but quarts has teh right refraction.

somthing different caused teh mutations when teh blck light was used.

i dunno thanks for the links man we will get to teh bottom of this.


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And Moses Said "Let my mushrooms grow!"


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Offlinethisone
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Re: UVa /UVB [Re: the man]
    #2050324 - 10/28/03 01:32 PM (13 years, 1 month ago)

IMOHO lighting has so little to do with sucess.


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InvisibleMycomancer
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Re: UVa /UVB [Re: the man]
    #2050887 - 10/28/03 04:49 PM (13 years, 1 month ago)


UVB: B stands for Burning.
UVB radiation is stronger than UVA radiation. It mainly affects the outer layers of the skin, causing sunburns, premature aging of the skin, and skin cancer. These rays are strongest during the summer months.

If you are suggesting that the reason mushrooms grow outside is because the UVB radiation sterilizes the Earth, then our planet would look more like Mars whose surface is sterile because it's atmosphere is so thin. The surface of Earth is not sterile. If we had UVB levels that were strong enough to kill contams in the air and on the ground, we all wouldn't be able to go outside because we'd get sun poisoning instantly.

Plus as noted above, UVB is strongest during summer months, though most mushrooms fruit in the fall when these rays are quite week.

It's not the UV that controls contamination outside.

Plus, why risk damaging the psilocybin content? Or causing yourself harm? It destroys DNA in any organism, especially the levels you want.

Also, the compost that professional mushroom growers use is not sterile! It's teeming with micro-organisms which keep the local substrate in a checks and balance which fights contamination. Pros don't flood their mushroom farms in UV (alot are in caves where no UV at all gets in), if it were the panacea of contamination control, they would be the first to implement it.

If this were the quick and easy solution to contam control, we'd all be with you, you'd be hailed as a genius while riding on our shoulders. I admit I considered this possibility myself once. It's this kind of debate that brings us closer to the answer.

mycomancer


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Offlinethe man
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Re: UVa /UVB [Re: Mycomancer]
    #2051211 - 10/28/03 08:06 PM (13 years, 1 month ago)

ok well than maybe someone should change the outdoor growing guide. in teh end it says UV helps control contams.

and UVb does kill soem contams. thats why they use them in flow hoods. maybe it woudl lower teh phycobin content. but what if UV just for teh preleminary steps. jsut to help control the contams (when most likely to get) not a constant stream of them.

thanks man glad it can be discussed rather than just thrown away or ignored.

peace


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And Moses Said "Let my mushrooms grow!"


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OfflineExtravagantDream
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Re: UVa /UVB [Re: the man]
    #2051613 - 10/28/03 09:55 PM (13 years, 1 month ago)

Most flow hoods do not have UV lamps
and quarts is glass


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Offlinethe man
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Re: UVa /UVB [Re: ExtravagantDream]
    #2051651 - 10/28/03 10:05 PM (13 years, 1 month ago)

ok man. but some soem flow hoods do for thta reason :smile:

it is the quartz glass taht allows uvb to go through. if it is not quarts(which was told to me by my physics teacher) than it is a specail glass type crystal that allows it to go through. normal glass filters UVB rays. just like shitty sunglasses also filter it and proclam its great but really cellophane woudl do it.

peace 


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http://www.fsrc.caand FSRE are now accepting edible/medicinal spores. please donate

And Moses Said "Let my mushrooms grow!"


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Offlinebonsai
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Re: UVa /UVB [Re: the man]
    #2051659 - 10/28/03 10:07 PM (13 years, 1 month ago)

Most flowhood manufacturers offer a UVC add on. It is what sterilizes the interior before you start to work in it. You would normally turn it off when you use the flowhood. UVC is the only germicidal wave length. I believe it is 254 nm wave length. The others are not germicidal. UVC renders bacteria, molds & fungal spores sterile (cannot reproduce sterile) Hope this helps.
bonsai


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Offlinewackytron
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Re: UVa /UVB [Re: bonsai]
    #2052861 - 10/29/03 04:55 AM (13 years, 1 month ago)

I'm not sure which UV kills contaims but I know at hospital entrances they sometimes have UV lights designed to kill germs, bacteria and the such. So it's gotta kill something


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Invisiblepsilomonkey
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Re: UVa /UVB [Re: wackytron]
    #2052922 - 10/29/03 05:50 AM (13 years, 1 month ago)

UVC is the wavelength used by Aquarium UV sterilisation devices.

EDIT: AVOID EXPOSURE TO UV-C RADIATION IT IS HARMFULL TO SKIN AND EYES, DON'T USE IT IN A TERRARIUM.

This is the sort of lamp I use (I use it to sterilise spore print surfaces and bags)



Taken from a site that sells UV stuff for swimming pools and all sorts http://www.havovia.co.uk.


Over a century ago, scientists identified the part of the electromagnetic spectrum responsible for this well-known effect; wavelengths between 200nm and 300nm, often called UV-C. The most effective single wavelength is typically UV at 265nm, however recent research in the USA has shown that 271nm light and 263nm light are the most effective UV wavelengths for the deactivation of particular target organisms.



The mechanism of kill is well documented and unlike chemical disinfectants the organism is unable to develop any immune mechanisms. The mechanism of kill involves the absorption of photons of UV energy by the DNA, which fuses the DNA and prevents replication. DNA (Deoxyribonucleic acid) consists of a linear chain of nitrogen bases known as purines (adenine and guanine) and pyrimidines (thymine and cytosine). These compounds are linked along the chain by sugar-phosphate components. The DNA of most forms of life is double stranded and complimentary; the adenine in one strand is always opposite thymine in the other, and linked by a hydrogen bond, and guanine is always paired with cytosine by a hydrogen bond. The purine and pyrimidine combinations are called base pairs. When UV light of a germicidal wavelength is absorbed by the pyrimidine bases (usually thymine) the hydrogen bond is ruptured. The dimer that is formed links the two bases together, and this disruption in the DNA chain means that when the cell undergoes mitosis (cell division) the DNA is not able to replicate. The most effective wavelengths to achieve this effect are found between 263nm to 275nm, and the peak wavelength distribution is dependent on the target organism.


Edited by psilomonkey (10/29/03 05:52 AM)


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