Has scihub had anything you wanted today?
It has given “don’t have it” on everything I’ve asked for today.
It had the paper above i posted a link to but not the hhc paper i was trying to get
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Thanks. Might have to ask for reprints instead…
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https://www.liebertpub.com/doi/10.1089/can.2022.0235
This paper says you can produce d9 directly from cbd with heat unfortunately i cant get the full paper its not on sci-hub.se
Yes it might be done at 170c but that doesnt mean the same reaction cant take place over time in a lower temperature environment
I can’t access to the paper for free me neither, using institutional loggin.
On the one hand, I a priori doubt a bit of the quality of the experiments. What quality of CBD isolate did they used ? Many commercial 99+ isolates still contain a few solid impurities (larger than 0.1 micron) than could help (very little) conversion. The container could also do the trick.
On the other hand, this is not relevant to the discussion (please read again my coments above, more carefully). Heat in the GC liner is indeed above 250 C (some use even 320, which I find unecessarily high), but the injected sample only dwell there for a few hundred of microseconds at most. And this deals with d9 (i.e. thd d8 eventually produced this way will be even less detectable) …
And again, for the 3rd or 4th time, why would up to 50x times more (if not even more) d8 be formed post mortem with fresh CBD samples (still in the field, or indoor, a day ago), than with d9 samples ? 
Repeating again, CBD can be found in most d9 strains, usually at 50 to 200x lower ammounts than THC, and in most cases below CBC content.
This is the opposite of what gail found above when dealing with biomass they said
And create this ratio reproducibly as a function of operational parameter.
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@Gail wrote they found more d8 in their d9 biomass than in their hemp. Did not said what levels in each, how many different samples, what is their LOD, biomass preservation levels, posdibility of artefacts etc… and out of artefacts, he would be contradicting the papers you were refering to. I’m dealing with something above 10k analysis, not “just” a few hundreds.
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What papers are you talking about? All the papers I’ve posted have said it’s from oxidation, that doesnt contradict anything ive said as gail even said they think enviroment plays a factor
How do you know they havent analyzed that many samples? You sure do seem to like to make assumptions which is another reason its hard to believe anything you say
Absolute levels, or ratio with D9?
Noticed a correlation with CBD levels?
Also @Gail how many samples are we talking?
What sort of D8 range?
I wonder if the observation holds with THCA hemp flower?
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The funny thing to me is if you look at any of the thca cookies is selling is literally all the same strains they sell in there dispensaries
If you search the sample numbers you’ll see that it’s all just renamed bs - mostly marin analytics
The New Bloom one on their website is edited to have the QR code removed
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I sure do make assumptions, based on my experiments, and not only on (what I want to see in) papers. Most papers on the topic are showing results on a few number of samples, 20 at most. Often, it is more about showing the method, than bringing meaningful results.
This paper for instance.
They don’t see d8 in one d9 strain (assuming it is not hidden with d9, with there long and resolved GC method).
Sampled and analyzed carefully, d9 strains generally do not show detectable d8. Most papers on d9 strains, as the review, go along the same line.
And I concur as well.
Sorry if i believe a published peer reviewed paper over someones assumptions. Youd think if what you were talking about is so prevelant someone would have had a sample pop for d8 in a paper but it hasnt. Not in any of the papers ive came across.
Yes but look at everything else they see
They find the c6,c7 thcs cbc and cbns yet no d8 of any kind
You can also look at the cis d9 paper i shared above they analzyed a bunch of hemp strains and non popped for any kind of d8
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Crazy how yall debate with a certified child molester as though it aint nothing to sneeze at.
Yes. A whole bunch of original stuff but no d8 in this d9 strain.
The cis-d9 paper is also very interesting.
They looked at most fiber hemps (low CBD), with total d9 well below 0.2 in most cases. The d8 isomers were then likely below their LOD (0.015%, it seems) except in the only high CBD strain they tested (Orange, figure 2) where they did find d8-trans-thc (but did not report it in the table 2). 
Still, the CBD:D9 ratios they get in most CBD samples seems unusually low (10 to 15, possible, but not so regularly) or sometimes very high, which tends to indicate that they may have co-elution (possibly d8+d9) as well with some of the method/set-up they used.
This is totally understandable, even more since we don’t know each other IRL. Still, again, the bunch of papers you cite do not formally refute my (and @Cyclopath’s) assumptions. They formulate their own. You are good at finding refs, but do read papers too much diagonaly.
And there is also often bullshit or mystifications, even after peer reviews. People are pressurized for publishing anything (publish or perish), and have not much time for doing proper reviews of peer papers (not mentioning frauds). Old papers prior 90’s, although more rudimentary, are often of higher quality, with more experimental details and lots of hindsights despites higher methods limitations.
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