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Light

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- Fri, 26 Dec 2014 02:34:37 EST 5BjIx1Ou No.75944
File: 1419579277601.jpg -(80538B / 78.65KB, 720x960) Thumbnail displayed, click image for full size. Light
Is it visible without anything to reflect off of and if you cannot see the source of it? I'm in a room lit only by the computer monitor, waiting for someone by my open window at night and the thought just randomly occurred to me and I thought I'd hear your guys' thoughts on the subject.
6 posts and 1 images omitted. Click View Thread to read.
>>
Angus Novingstone - Sun, 13 Dec 2015 16:35:02 EST u8+Bwmjx No.77431 Reply
>>76913
or just ya know, use a half reflective plate that way some light passes through anyway
>>
Molly Sabbercocke - Sat, 02 Jan 2016 18:31:11 EST 5xtVf077 No.77490 Reply
1451777471784.gif -(2090770B / 1.99MB, 500x335) Thumbnail displayed, click image for full size.
>>76913
Not so fast!
This isn't completely wrong.
If you could build a box out of PERFECT mirrors
and
If you could keep the mirrored box from losing ANY energy over time...
then following troll's procedure would result in
the input light bouncing around ~forever
However, you could never use the light for anything for anything or observe it, since doing so would consume the meager amount of energy stored by the endlessly reflecting photons.
There is an electromagnetic component to this as well, but I'm pretty sure that a PERFECT mirror keeps reflected radiation from losing energy due to electric or magnetic forces.
Given, perfect mirrors don't exist, and likely never will... however with really fucking good mirrors you could get the light to hang around for longer.
Cooling the entire setup to nutsack shattering levels would help with duration as well.

Any way to extract mitragynine from kratom?

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- Tue, 13 Nov 2018 17:24:30 EST pv6fN59z No.79275
File: 1542147870232.png -(3583B / 3.50KB, 269x187) Thumbnail displayed, click image for full size. Any way to extract mitragynine from kratom?
First off I'm not a complete noob asking if adding hydrogen peroxide to kratom leaf makes 7-hydroxymitragynine.

I'm basically just wondering if it's even possible to extract 90%+ pure mitragynine from kratom. Would such a thing be possible without chromatography? Simple A/B then chloroform and then maybe specific solvents/PH?
12 posts omitted. Click View Thread to read.
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press - Fri, 26 Apr 2019 16:22:33 EST kphkeya5 No.79400 Reply
>>79391
according to kirt the servers were fucked up by a snow storm and the backup wasnt up to date. but tbh i cant be arsed to reconstruct the time line.
>>79342
i was just repeating what somebody else posted. i see your point but i suppose employing picrate to precipitate alcaloids comes from the same time where you had to spend multiple years to describe the structure of a molecule. not to shit on indian or indonesian publications

don't know if this is the right place to do so but can someone explain these?

View Thread Reply
- Mon, 10 Jun 2019 14:41:21 EST NRmhCwT/ No.79448
File: 1560192081864.png -(19763B / 19.30KB, 646x565) Thumbnail displayed, click image for full size. don't know if this is the right place to do so but can someone explain these?
DICKS EVERYWHERE
>>
Caroline Copperwater - Mon, 10 Jun 2019 14:42:05 EST NRmhCwT/ No.79449 Reply
1560192125864.png -(16300B / 15.92KB, 645x459) Thumbnail displayed, click image for full size.
DICKS EVERYWHERE
>>
Caroline Copperwater - Mon, 10 Jun 2019 14:43:35 EST NRmhCwT/ No.79450 Reply
1560192215864.png -(23299B / 22.75KB, 654x716) Thumbnail displayed, click image for full size.
DICKS EVERYWHERE
>>
Polly Clavingnack - Thu, 13 Jun 2019 15:08:38 EST Zmz7NC7L No.79453 Reply
>>79449
if you can't figure this one out then there's no hope for you tbh, i literally just looked at it and found the extremely obvious pattern
>>79448
probably -5

Women in STEM

View Thread Reply
- Tue, 23 Apr 2019 19:13:04 EST b3zaIvHO No.79381
File: 1556061184766.png -(62871B / 61.40KB, 450x400) Thumbnail displayed, click image for full size. Women in STEM
call em flowers, cause they supported by STEM
6 posts and 2 images omitted. Click View Thread to read.
>>
Nicholas Packleman - Fri, 26 Apr 2019 09:27:51 EST QiRUncgI No.79397 Reply
1556285271081.jpg -(148714B / 145.23KB, 1000x1080) Thumbnail displayed, click image for full size.
>>79393
>>guess my third favorite prime number?
>>third
oh, you ;)
>>
Albert Turveyham - Wed, 12 Jun 2019 01:37:29 EST iodsxG4D No.79451 Reply
>>79387
>implying being blind is the same thing as having a pussy
>>
Priscilla Fibberchotch - Wed, 12 Jun 2019 09:49:10 EST dMB264Ep No.79452 Reply
>>79451

>a woman or black or a cripple or nauseatingly ugly

Could this even work as a mdma cousin

View Thread Reply
- Sat, 16 Mar 2019 03:20:33 EST QsIEMZCJ No.79321
File: 1552720833299.jpg -(1059463B / 1.01MB, 2576x1932) Thumbnail displayed, click image for full size. Could this even work as a mdma cousin
Thoughts can this even work as a stable molecule
>>
press - Tue, 26 Mar 2019 14:42:29 EST eWOCLe3q No.79329 Reply
stable under which conditions, like just sitting airtight, dry, at roomtemp. i guess
the phosphoric ester would be hydrolyzed in vivo, so youre basically dealing with methylone with an added phenolic function at the 2 position of the phenyl

most likely active but how active, god only knows unless you can dig up a research paper with the binding constants for several receptors
wiki wasnt too informative on 2'hydroxymethylone/2'methoxymethylone and i know fuck all about QSAR
>>
Edward Hussleson - Sun, 09 Jun 2019 20:21:21 EST 0ZtUa/pQ No.79447 Reply
leave that goose alonoe

Why is this the case?

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- Thu, 25 Apr 2019 01:23:27 EST bUpRMfRf No.79388
File: 1556169807858.jpg -(63514B / 62.03KB, 700x538) Thumbnail displayed, click image for full size. Why is this the case?
I've been enrolled in a Trigonometry course this semester and I have been enjoying it. I also think the main Pythagorean theorem is one of my new favorite equations, but I just don't understand one thing. Why is the result of the expression equal to one?

sin²β + cos²β = 1

We've learned about "proves" where you try to arrive to the answer by choosing the busiest side and in this case the left side, but how would you go about proving this specific this? I heard that more advanced math knowledge was needed (e.g. Calculus) but is that really true or can this be proven using what is learned in Trigonometry itself?

Also, in other Trig courses, do instructors actually assign this expression as a homework question all to itself? I thought this was just a formula given to help solve problems and not an actual problem.

I also recently learned that Pythagoras was a philosopher and even had his own cult. What are some of the other things this man was known for?
11 posts and 2 images omitted. Click View Thread to read.
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Betsy Boddleshaw - Fri, 03 May 2019 16:45:56 EST QiRUncgI No.79410 Reply
>>79409
The allegory of the cave is a metaphor for epistemology, I don't think Plato was positing it as a realistic scenario, whereas the simulation argument might be taken for a metaphor about epistemology but primarily positions itself as a realistic explanation for reality. (cf. the Evil Genius argument; Descartes didn't really believe he was a brain in a vat, he was trying to prove a point.)
There really isn't a difference between the way our brain simulates the world and a computer simulation of the world; but that itself, comparing the brain to a computer, is just another metaphor, and largely the product of the repeating phenomenon in the history of science where the rest of the universe is re-contextualized as being 'like' whatever the most important technological advance of the day is (this has happened with everything from fire, writing, and wheels to rail-roads and electricity.)

Not to say that he or Pythagoras couldn't eventually understand the concept of a computer and programming languages, and be able to relate them to how the mind and possibly the universe works, but you would need to educate them about all the stuff that underlies those ideas first. Like, the number zero and real algebra would be the first big things.
>>
Rebecca Sondlestock - Thu, 09 May 2019 09:36:08 EST fBrSG5+b No.79416 Reply
1557408968273.jpg -(106274B / 103.78KB, 786x1017) Thumbnail displayed, click image for full size.
>>79410

And yet the work of flatland and explanations of dimensions beyond human comprehension are adequately expressed using the allegory of the cave.

I do enjoy that you make the distinction that belief is not relevant to argument. So rarely do people understand that critical nuance.
>>
!scyTheNg3k - Thu, 30 May 2019 18:10:02 EST +fcpEO88 No.79430 Reply
>>79388
the proof was given correctly above but the dude used latin for some reason.

sine is the ratio between opposite side and hypotenuse. sin(x) = O/H
cosine is the ratio between adjacent side and hypotenuse. cos(x) = A/H

pythagorean theorem: (adjacent side)^2 + (opposite side)^2 = (hypotenuse)^2
O^2 + A^2 = H^2
divide both sides by H^2
O^2/H^2 + A^2/H^2 = 1
rearrange
(O/H)^2 + (A/H)^2 = 1
by definition
sin(x)^2 + cos(x)^2 = 1

Time warp

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!cyBOrG7t12 - Wed, 20 Feb 2019 17:56:06 EST 2VxE8R8t No.79306
File: 1550703366347.jpg -(18839B / 18.40KB, 324x418) Thumbnail displayed, click image for full size. Time warp
There was a snowstorm where the servers are. It got so cold that it started to go below absolute zero, resulting in particles moving backwards in time. So here we are.
14 posts and 1 images omitted. Click View Thread to read.
>>
Therm0ptic !cyBOrG7t12 - Mon, 15 Apr 2019 02:07:59 EST Jyqi6ep7 No.79369 Reply
>>79363
You could be on to something. How do we test this?
>>
press - Mon, 15 Apr 2019 16:24:42 EST kphkeya5 No.79370 Reply
>>79369
the letters ive written to multiple universities and kirt have yet to be answered. quite shocking if you take into account that the grant i asked for was a mere 1000 dollars (adjusted for inflation during the experiments), which according to my alculations would be the mere minimum to fund a trial. further research would obviously take much less time once the direction of time travel isnt limited to forward and side effects such as pissing myself are minimized. this far ive been able to travel up to 4 days at 1 litre of fuel per day traveled

i suspect mainstream science is supressing work in this field. neil degayass tyson has blocked me on twitter
>>
Therm0ptic !cyBOrG7t12 - Tue, 16 Apr 2019 13:01:06 EST j9C4BMRh No.79371 Reply
>>79370
Damn. I guess we should set up a Taima University so deep researchers like you can have the lab space and resources necessary for real alcohomploshments in your field.

Long time 420..er but not /chem/ person

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- Sun, 31 Mar 2019 05:06:11 EST U39B6FlA No.79341
File: 1554023171889.jpg -(36565B / 35.71KB, 440x308) Thumbnail displayed, click image for full size. Long time 420..er but not /chem/ person
I checked out all the boards here as a teen cus there are so many devoted to so much
this chan is the tightest shit

Anyway my guys

I have done LSD and I have grown shrooms
more into the shroom thing
Im really interested in altered states of consciousness
like how the LSD works in the brain
also making it, Im sure this is a very stereotypical post but I really am going back to school and not fucking up (hopefully)
I am good at computers and originally was in-between a degree in art and getting a credential to teach kindergarten
Im good with kids and around 80k a year and grading "the colors"
would be the peak of mediocrity for me and just let me coast and die which sounds nice
I am also decent at computers and thought I could do data science things
BUT I believe I can probs pursue data science and art on my own
& would rather go a little harder and choose a biotech science that involves the synthesis of chemicals
or something that would lead me to nanotech or cyborg shit
I am excited to school I would like to science these are my words please help me
>>
Esther Connerhat - Mon, 01 Apr 2019 21:14:18 EST QiRUncgI No.79343 Reply
Would love to help but not really seeing a question in there. I think like most people at your stage you need to explore your options and really come down on a few possibilities...this is more /qq./ As for trying to synthesize LSD, it's one of the more difficult ones out there, you need advanced practical biochemistry...you probably should try your hand at basic tier chemistry before you can even answer the question of if it's something you would want or be capable of doing.

/STEM/

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- Thu, 01 Nov 2018 23:24:25 EST wkZjcyRQ No.79273
File: 1541129065535.jpg -(23597B / 23.04KB, 232x325) Thumbnail displayed, click image for full size. /STEM/
Maybe we should have /stem/
>>>/420/247062
4 posts and 1 images omitted. Click View Thread to read.
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press !YxHJQHLaEk - Fri, 29 Mar 2019 15:50:59 EST XqaGYEnB No.79336 Reply
>>79334
maybe stick around to see if it did anything?
i mean
einstein and bohr thought the new understanding of the atom would bring world peace, and then were really sad about something something in japan, when the atomic bomb actually stopped the cold war from becoming hot. thus most of the suffering got diffused by splitting up germany and korea, bombing vietnam, laos and kambodsha with enough bombs to make the whole thing seem like a death cult ritual and further destabilizing the craddle of civilization, as if the first world war didnt do enough damage, by shoving arms up the asses of whatever warlord was trendy. also something in latin america something something
dont get me wrong i still support nuclear energy and am very curious about this /stem deal
>>
press !//CEObOMBY - Sat, 30 Mar 2019 12:23:50 EST Xcif41Xj No.79339 Reply
>>79337
good bye then?
unless yyoure trying to pull one of them jesus "do as i say not do as i do" spiels on me

past time travel

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- Fri, 30 Nov 2018 15:10:58 EST GtE/9ebI No.79290
File: 1543608658580.jpg -(344271B / 336.20KB, 1024x683) Thumbnail displayed, click image for full size. past time travel
What kind of time traveling technology are we going to have in the future?

200 years ago the best way to view past events was through art, paintings, drawings, or written text.

In the present we all have smartphones that can record audio/video at any given moment giving us an exact copy of the present for viewing in the future. There is also youtube and other major databases of video/audio from the past that is an exact copy of reality at that given time and setting in the video.

What is coming in the future? Is it 10s of thousands of years from now, hundreds? We're clearly going to have something that is just as much of a mind blowing leap as paintings -> recorded video. Are we finally going to be able to communicate and interact with the past in real time?
3 posts omitted. Click View Thread to read.
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Jack Wallerfog - Sat, 16 Mar 2019 05:34:50 EST RVtEPlUX No.79322 Reply
recently i read interesting aticle about time traveling
>>
Nicholas Goodlock - Sat, 16 Mar 2019 17:51:41 EST dl9lAnzN No.79323 Reply
>>79304
Hm maybe this isn't your sci-fi blog?
>>If I were you guys I’d move to Malaysia FAST
What plebian timeline are you from? My crystal ball says dragons will eat all nations except Lichenstein. Howboudah?
>>
C-Higgy !lfsExjBfzE - Tue, 26 Mar 2019 20:01:49 EST 8P8c+L33 No.79332 Reply
Hopefully something with portals, that would be dope.

Drug Testing

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- Sat, 02 Mar 2019 18:28:30 EST pUb2iHzJ No.79313
File: 1551569310684.png -(127855B / 124.86KB, 1345x2392) Thumbnail displayed, click image for full size. Drug Testing
Is there a way to test whether my X is actually X without a reagent kit? Anything that could narrow down the possibilities is helpful
>>
Wesley Dugglewill - Wed, 13 Mar 2019 04:57:04 EST EgtLYZA7 No.79318 Reply
>>79313
Why are you avoiding a reagent kit in the first place?
>>
Fucking Smallforth - Thu, 14 Mar 2019 16:42:47 EST LAqsvRkE No.79320 Reply
Yes, but all are much more complicated than a reagent kit and if you can't buy or use a reagent kit you won't be able to do those. Things like melting point measurement, x-ray diffraction, GC/MS, MS/MS, HPLC/MS, IR spectroscopy, UV-VIS spectroscopy, NMR spectroscopy, conductometrics, gel-electrophoresis, etc. Just buy a fuggin reagent, or make it yourself: 4% of concentrated formaldehide, 96% of concentrated sulfuric acid. I heard in USA you can buy cc. H2SO4 as drain cleaner/declogger. Formaldehide is sold in the pharmacy. Mix it slowly while cooling, allow it to sit a few hours than drop a drop on a little piece of your X, if it turns purple it's something containing the methylenedioxy moeity, and since almost all possible drugs containing it are illegal now, why would someone bother making something like MBDB or Methylone or etc when he can make MDMA easier, cheaper and just as illegally.

Candyflip creation

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- Sun, 28 May 2017 22:51:16 EST eE+IWTWR No.78666
File: 1496026276961.jpg -(532507B / 520.03KB, 1507x1270) Thumbnail displayed, click image for full size. Candyflip creation
I'm looking to start small-scale creation of mdma and lsd. I've got next to no chem. knowledge, and no lab setup yet.

Got any recommendations for reading? Uncle fester and schulgin are the only ones i know of and both are above my pay grade.
What glassware is required? Recommended?
Any recommended materials sources?

Thanks
29 posts and 5 images omitted. Click View Thread to read.
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Martin Worthingshaw - Tue, 11 Dec 2018 04:20:58 EST H2dReURr No.79302 Reply
>>79292
Those books are pretty old and a lot of the ingredients lists have either been put on lists or simply become less available/more expensive due to normal market reasons, such as decreased demand and production and industry standards leading to different choices. It's quite possible that where OP is, the specified list of requirements could be 10x what he actually needs for the synth.
>>
Jack Blepperlure - Wed, 12 Dec 2018 18:23:16 EST X7AWx7pQ No.79303 Reply
Follow your dreams I need at least 15,000 barrels
>>
Polly Goodbanks - Fri, 01 Mar 2019 06:06:24 EST zrV5jqLv No.79312 Reply
OP, first place to start is to understand 'unknown unknowns'.


Why don't they just build reactors deep underground?

View Thread Reply
- Sun, 21 Oct 2018 09:48:58 EST OuVlsNVB No.79259
File: 1540129738526.jpg -(34374B / 33.57KB, 267x345) Thumbnail displayed, click image for full size. Why don't they just build reactors deep underground?
Maybe this is a dumb question. But I'm going on my annual wikipedia dive on nuclear disasters.

If they built all of these like 500m below the surface and covered in heavy rocks or concrete/steel wouldn't most of the effects of a total melt down be contained by the ground?

It seems like the worst part of a subterainian melt down vs one on the surface is there is probably a mini earth quake in the area.
But in my mind it seems most of the fallout and radiation would be contained, you only have to worry about ejected materials and chuncks i suppose?/
And as long as your reactor isnt near any fault lines i dont see any real danger.


Also after a melt down it seems itwould be much easier to fix the problem if its in a giant hole in the ground vs sitting in the middle of a Schooln village.

IDK, educate me internet.
11 posts omitted. Click View Thread to read.
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Doris Chittingford - Wed, 14 Nov 2018 00:40:43 EST dl9lAnzN No.79276 Reply
>>79274
>>Why isn't it used everywhere?
It's a more advanced technology that isn't as fully developed, so everything about it costs more. And, even if it were at the same economy of scale, an individual unit of fuel costs more, since it must be transmuted from thorium to uranium first. The only savings are in safety and waste concerns, and those are long term costs which people like to ignore in favor of short term ones.
>>
James Randi - Fri, 30 Nov 2018 07:03:01 EST OuVlsNVB No.79289 Reply
>>79276
This is just my understanding, I could be wrong. It seems mainly because were stuck with the old reactors because they cost so much to build that we more or less have to use the old ones for a long time until they've paid for them selves or outlived their usefullness or economic sustainability.

Then also the whole industry is standardized around the old technology. So to switch to a new one would be like a major format shift that the entire industry would need to adapt to, and it just costs too much money.
Also you would need to train a whole new generation of nuclear power plant operators on a new type of reacor. Where I imagine that most of the work is still on old reactors, why train for the new ones?
>>
Lydia Bunfuck - Thu, 06 Dec 2018 03:29:38 EST 96grgyjN No.79294 Reply
>>79265
Power generation can't occur solely in one specific place. It's decentralized for a reason: power transmission is not an efficient process over massive amounts of distance. It's the same reason the old "why don't we just build massive solar arrays in the Sahara to power the world" trick won't work. It's not enough to generate the power, you have to wire it to the locations that consume power. Resistance, even for highly efficient conductors like copper wire, plays a big role in determining the power grid and its constituents.
>inb4 someone wanks over wireless power transmission/tesla

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