godvolcano
Member
So incredibly eye opening. The more and more I read about Marijuana, the more I'm in awe.
Thanks for the good read!
Thanks for the good read!
You are quoting the science wrong.Except it takes a year (on average) to lose just 7% THC
The science
http://www.unodc.org/unodc/en/data-and-analysis/bulletin/bulletin_1997-01-01_1_page008.html
So, No, it won't work. Best to get a high CBD strain if that is what you want, there are plenty of em out there, I've grown a few
This means that THC content can be understood as THC and CBN, since CBN (the degradative product of THC) can be directly attributed to THC.M. Stefanidou et. al. said:In some cannabis products the low proportion of THC is not incompatible with their resinous character, as CBN (a degradation product of THC) in these samples is presented in large proportions. This leads to the suggestion that THC plus CBN content in fact reflects the total THC content, irrespective of degradative changes
What I quoted from the study,,,,,,,You are quoting the science wrong.
Dried plant material loses, on average, 16.6% of THC over a year of storage, according to the study you linked.
The 7% you are quoting, which is in fact 7.4%, is the standard deviation, a measure of how much the results deviate from each other. In essence you are misrepresenting the findings of the scientists you are quoting, by a factor over 2.
Another study found that THC, stored in a formulated system @ -18, 0, 4 & 25 degrees centigrade, degraded by ~15.8% to 20% in 10 days, with the numbers rising over the range of 15 months to 20+%, which seems to fit well with the correct percentage of 16.6% in the study you linked (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2921171/).
THCA can be, and is converted to CBNA over time (with CBNA then converting to CBN), and that is why CBN is reflective of the age of a given developing plant, as much as it is reflective of the age of stored plant material.
Of course the amount of CBN in a given plant is also reflective of the particular strain.
But to say that CBN is not present in growing plants, or that it takes a year to see just a 7% degradation into CBN, or that we cannot use the development of trichomes to determine the age and levels of different cannabinoids is just wrong.
Furthermore I'd like to add that scientists on this topic argue that THC + CBN reflects the total THC content of a given plant, regardless of degradation;
This means that THC content can be understood as THC and CBN, since CBN (the degradative product of THC) can be directly attributed to THC.
Ref; M. Stefanidou, S. Athanaselis, G. Alevisopoulos, J. Papoutsis, A. Koutselinis, D9 - Tetrahydrocannabinol content in cannabis plants of Greek origin, Chem. Pharm. Bull. 48 (5) (2000) 743–745.
You are completely misunderstanding, or more likely, misrepresenting what the scientists found in the study.What I quoted from the study,,,,,,,
the degradation of THC appears to proceed at a higher rate for the first year than subsequent years and levels off after two years to a rate of loss of approximately 7 per cent per year. Therefore, studies carried out with "old" material could feasibly report a 7 per cent loss per year. It is believed that the percentage loss in THC content is also a function of the initial THC concentration. The higher the concentration of THC, the faster the degradation over the first one or two years.
I am not sure if I am getting through to you here, but either you are misrepresenting what the scientists found in this study, or you are being facetious. In either case, you are not respecting the science behind the study.Study said:...the degradation of THC appears to proceed at a higher rate for the first year than subsequent years and levels off after two years to a rate of loss of approximately 7 per cent per year.
Yes the square of the variance from the mean or such. But what is your level of confidence in this crap? To be 99.6% confident and have an r-square approaching one is quite impressive. Figures don't lie. Of course liars figure too. So much for my understanding of probability and regressing on a multitude of variables.You are quoting the science wrong.
Dried plant material loses, on average, 16.6% of THC over a year of storage, according to the study you linked.
The 7% you are quoting, which is in fact 7.4%, is the standard deviation, a measure of how much the results deviate from each other. In essence you are misrepresenting the findings of the scientists you are quoting, by a factor over 2. .
I don't understand what you asking; my level of confidence in what 'crap' exactly?Yes the square of the variance from the mean or such. But what is your level of confidence in this crap? To be 99.6% confident and have an r-square approaching one is quite impressive. Figures don't lie. Of course liars figure too. So much for my understanding of probability and regressing on a multitude of variables.
Did you read the report? I did and it wasn't all that complex and nothing to do with statistical theory. It was a simple test that tracked change in THC and CBN content over time. They did have controls for the analytical equipment. The error of the measurement was high, but we are talking about extraction of plant material and all the error inherent in the method. Sample sizes were large enough to overcome measurement error.Asking? Do you see any question marks? No?
Listen, statistical theory tends to boggle most peoples minds. Thazz all. And like I said, how accurate was that report? How many reviews of said report were critical of methodology, assumptions, and double blind controls.
I actually did a test of sorts, took a bud that tested 25% THC and left it sit out on my coffee table for a month, then tested it again it was now 22% in the first test there was zero CBN, in the 2nd test there was 1% CBN which jived with what was said in the report.Did you read the report? I did and it wasn't all that complex and nothing to do with statistical theory. It was a simple test that tracked change in THC and CBN content over time. They did have controls for the analytical equipment. The error of the measurement was high, but we are talking about extraction of plant material and all the error inherent in the method. Sample sizes were large enough to overcome measurement error.
The figure below was copied from the report. In the first year, %THC weight loss was very fast, roughly 17% and then slowed down thereafter, leveling off to roughly 7%-9% per year after the first year. The change in rate of THC loss indicates there was a different mechanism or process driving early weight loss with a shift to another mechanism, I'm guessing rate limited by diffusion, after the first year.
One problem with using this study to discuss THC loss in our weed it that the THC content of the study weed was pretty low ~2%-4%. Good commercial weed is what, 15%-25% THC? Would THC loss rate be higher at higher concentrations or would it be slower? All I'm saying is that we are extrapolating results from a study using low THC weed to guesstimate what happens with today's commercial weed. Not saying that results from the study aren't useful.
So, leaving the issue of extrapolation error aside, what does it mean really? If I have a sample of weed with 20% THC and 17% degradation during the first year, that weed will contain about 17% THC. After year 2, assuming 8% wt loss, it will have 15% THC and 14% THC after year 3.
Maybe for somebody with high tolerance to THC, the amount lost over 3 years would be significant. To a lightweight like me, probably not.
25% THC going down to 22% THC in the first month would be about 12% change in total THC by weight, so yes that jibes pretty well with the UNODC study. Thanks.I actually did a test of sorts, took a bud that tested 25% THC and left it sit out on my coffee table for a month, then tested it again it was now 22% in the first test there was zero CBN, in the 2nd test there was 1% CBN which jived with what was said in the report.
My God man, 12% vs.17% ? The report results are 42% higher. Jive? You bet.25% THC going down to 22% THC in the first month would be about 12% change in total THC by weight, so yes that jibes pretty well with the UNODC study. Thanks.
People making hash out of statistics can bring a chuckle. I wonder if that would be bubble hash or kief?My God man, 12% vs.17% ? The report results are 42% higher. Jive? You bet.
(Ain't statistics fun?)
It can indeed be fun to see people stumbling trying to understand a simple statistical analysis.People making hash out of statistics can bring a chuckle. I wonder if that would be bubble hash or kief?
RM3's data was in line with the data in the report. Doesn't prove anything because we can't know what the UNODC test samples would have shown had they been tested in one month.
You confuse statistics with data. Just saying.
Yes, as a producer, a 12% loss in THC content would, I think, be a big deal. No argument there. The problem would be larger variability so more samples but not that much of a complication.It can indeed be fun to see people stumbling trying to understand a simple statistical analysis.
What I find more interesting though, is the fact that a 12% drop in potency, in just 1 month, isn't considered a large drop off in potency by some people in this thread. I'd say that losing 12% of anything, in the span of just 1 month, is a pretty tough loss.
In any case, you summed it up very well, it does not prove anything, since the real data from the study didn't test samples after such a short period.
It would be fun to see what actual scientific results would be in short periods of time, perhaps 1 week, 2 weeks and a month, to get a better understanding of the potency loss.
Indeed, and I truly hope that we will see a lot more in depth studies on the complexity of cannabinoids and their development in the future, both in vivo and in vitro.Yes, as a producer, a 12% loss in THC content would, I think, be a big deal. No argument there. The problem would be larger variability so more samples but not that much of a complication.
im not a hydro guy.Wrong spot I apologize..drying issue(where to?)
Made changes to my setup and forgot about drying woops...now I'm running a one room setup so I obviously only have my venting system in there...I know it's not best but I think my best bet short term is to dry them in there till I can cure...any suggestions,pointers advice..
I run 400's..rooms never about 75...exhaust/Fa and all that good stuff..using stackable mesh drying racks..im contemplating putting them anywhere outside the room but I realize how important my ventilation system is
Smell mainly. I very well may do it that way..haven't decided yet...stinky house or expose buds to light something Ive never doneim not a hydro guy.
Why carnt you just dry them in another room, garage, somewere else? Just have a fan circulating the air like most of us do.
That way u can get on to your next grow.