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Lovely movies for /chem/ by Nicholas Blottingtatch - Sat, 22 Jun 2013 03:39:28 EST ID:DBJqtmyI No.71889 Ignore Report Reply Quick Reply
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Primer
http://www.youtube.com/watch?v=vNfxDFbQY10

Re-Animator
http://www.youtube.com/watch?v=--YZ6USvYN4

The Adventures of Buckaroo Banzai Across The Eighth Dimension
http://www.youtube.com/watch?v=v2axIy9KExY

Mindwalk
http://www.youtube.com/watch?v=Uec1CX-6A38

2001: A Space Oddysey (90 minute edit)
http://www.youtube.com/watch?v=Q4ybBSHmWUc
Comment too long. Click here to view the full text.
3 posts and 1 images omitted. Click Reply to view.
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Charles Mommlehall - Wed, 24 Jul 2013 11:41:08 EST ID:ynXGScrO No.72265 Ignore Report Quick Reply
i love these threads
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Cornelius Nommlelatch - Wed, 31 Jul 2013 10:15:46 EST ID:S7sdfVEY No.72322 Ignore Report Quick Reply
>>71889
>Primer
if ya'll like Primer, the director made another movie called Upstream Color that I think you'd appreciate
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Fanny Fannerwater - Mon, 05 Aug 2013 10:44:14 EST ID:s2Qi115W No.72368 Ignore Report Quick Reply
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Borders (1989)
http://www.youtube.com/watch?v=yNZpRSuOB64

Steve Buscemi! Fuck yeah Steve Buscemi.
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Wesley Finningstone - Wed, 28 Aug 2013 17:43:59 EST ID:ly5I4VF/ No.72629 Ignore Report Quick Reply
bump
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Hamilton Bangermun - Sun, 09 Mar 2014 09:45:25 EST ID:B5EZdnj6 No.74317 Ignore Report Quick Reply
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The Andromeda Strain (1972) in one file.
http://www.youtube.com/watch?v=zwQU0nZWarQ


Surviving near-light speed travel by Shitting Gemblekun - Mon, 03 Mar 2014 21:02:53 EST ID:mj+5dAm9 No.74274 Ignore Report Reply Quick Reply
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Is it going to ever be possible?
Colleague sent me this:
https://www.usenix.org/conference/evtwote10/speed-kills-highly-relativistic-spaceflight-would-be-fatal-people-and
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Esther Pidgewill - Tue, 04 Mar 2014 11:56:59 EST ID:i/IOegTc No.74275 Ignore Report Quick Reply
>>74274
Cool video. Wormholes are the answer, since they would allow travelling large distances without going at relativistic speeds. Of course, they might just be science fiction.
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Esther Bunningmat - Wed, 05 Mar 2014 11:35:08 EST ID:JHOMP1CY No.74282 Ignore Report Quick Reply
to quote the guy in the video, "there is no warp bubble dummy."
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Phineas Punderman - Thu, 06 Mar 2014 07:06:04 EST ID:OULkNbcw No.74293 Ignore Report Quick Reply
>>74282
>there is no warp bubble dummy
>this is an unsubstantiated claim


just a quick question by Ebenezer Cromblefetch - Tue, 04 Mar 2014 16:27:43 EST ID:15FgcyBy No.74277 Ignore Report Reply Quick Reply
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what are the main flaws / drawbacks of radio carbon dating?
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Henry Tootdale - Wed, 05 Mar 2014 19:07:13 EST ID:t3u0MpvA No.74289 Ignore Report Quick Reply
You can only use it on formerly living things, it's useless past a certain age (circa 8 half-lives), materials used to extract samples may intefere with the process (for example, if organic solvents are allowed to evaporate and skew the pre-determined circumstances assumed in counting), and the effects of error increases as the age of the sample decreases (the smaller the count, the more a single error matters).
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Basil Paffingmudge - Thu, 06 Mar 2014 02:50:17 EST ID:QpCqUBZq No.74291 Ignore Report Quick Reply
>>74277
#congonid llamas


On the subject of more precise extracts of cannabis by Matilda Pannerson - Mon, 24 Feb 2014 00:01:25 EST ID:EbB2mzS5 No.74250 Ignore Report Reply Quick Reply
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If I put pot inside of one of these, would I get oil?

Also, the 'resin' that accumulates inside of a vape stem, is that also oil or something different? Would it be active orally?
3 posts omitted. Click Reply to view.
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Thomas Grimway - Mon, 24 Feb 2014 22:52:18 EST ID:XfuN5sQx No.74258 Ignore Report Quick Reply
Why can't an individual make a tincture with ethanol 190 proof and evaporate out the ethanol (by just having it sit out) to concentrate the cannabanoids in the solution.
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Lillian Nondergold - Tue, 25 Feb 2014 04:29:10 EST ID:iy2BXZ7j No.74260 Ignore Report Quick Reply
>>74258
You can but ethanol is not a very selective solvant and a tincture typically lets the solvant in contact for a few weeks. So it would not be much more concentrated, it would be solid and it would probably be annoying to smoke.
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Clara Pockleson - Tue, 04 Mar 2014 20:25:27 EST ID:0YyKnwjY No.74279 Ignore Report Quick Reply
In theory you can distill anything, but large heavy molecules with strong intermolecular forces don't like to come over easily. Thick oils and resins are separated this way in the petroleum industry, but as has been mentioned it's problematic for weed because the high temperatures will destroy some drug fractions.

If I was going to do this as a chemist, I would start with an exhaustive extraction with ethanol (maybe using a soxhlet extractor or just a simple tincture). I would then microfilter the liquid phase and separate it into fractions by column chromatography.

http://en.wikipedia.org/wiki/Column_chromatography

It's actually a very simple technique. All you need is a few solvents to experiment with (methanol and acetonitrile would be a good bet), some fine silica or even sand, and a glass tube.

It should be possible to separate each cannabanoid to near 100% purity this way. If you believe in synergistic effects, you can mix them up again in any ratio you like. I'm a purist when it comes to drugs though.
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Clara Humbletut - Wed, 05 Mar 2014 15:40:34 EST ID:P1NXpKdP No.74283 Ignore Report Quick Reply
I would grind the pot and extract it using butane or methanol or acetone. I would place the extract in a heating flask containing a small amount of ethanol. I would set the heat at 10 degrees celsius above the boiling point of the butane or acetone or methanol. I would heat the flask at this temperature until a constant mass is achieved. I would use the distilled solvent to extract from the grind again. I would repeat this procedure as needed, diluting the resin ethanol mixture as needed to prevent the lighter solvents from being trapped within the resin, thus producing a cannabinoid resin diluted with methanol.

That is if i were to run a total extraction of cannabinoids from the plant matter.
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Clara Humbletut - Wed, 05 Mar 2014 15:47:16 EST ID:P1NXpKdP No.74284 Ignore Report Quick Reply
Oops

Diluted with ethanol


We did it by Shitting Gemblekun - Tue, 04 Mar 2014 13:21:28 EST ID:mj+5dAm9 No.74276 Ignore Report Reply Quick Reply
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Everyone stop what you're doing. Science is complete. We did it boys!

http://www.the-scientist.com/?articles.view/articleNo/39317/title/Goat-Pheromone-Double-Whammy/


bk-2c-b reduction to 2c-b by Graham Buzzshaw - Tue, 18 Feb 2014 07:15:36 EST ID:9ZnmOMC2 No.74225 Ignore Report Reply Quick Reply
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Hi,

does anyone know if this is possible? I'm guessing a Clemmensen reduction might work?
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John Tillingdock - Mon, 03 Mar 2014 19:49:46 EST ID:g+PkR+ei No.74273 Ignore Report Quick Reply
Clemmensen is unnecessary, you should be able to hydrogenate only using a palladium catalyst


Learning Physics by Shitting Donnerwater - Mon, 17 Feb 2014 07:16:59 EST ID:SBjojHtZ No.74218 Ignore Report Reply Quick Reply
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Hey /chem/,

I'm a second year physics student and I'm have troubles with learning the material and solving the problems.

It takes me way too long to solve the problem sets, almost double what it takes my classmates and I preform poorly on the tests.

Can any of you give me some tips on how to improve my study and problems solving style?

Perhaps some strategies on how best absorb the material presented in the book and in lecture?
7 posts and 1 images omitted. Click Reply to view.
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Eliza Honeyway - Mon, 24 Feb 2014 12:47:46 EST ID:ij8Omm1l No.74253 Ignore Report Quick Reply
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>>74218
How do you approach a problem set? I write down what I'm looking for, all quantities the problem set gives you, implicitly or explicitly and then all related equations. If I'm having trouble envisioning the situation, I make a detailed diagram. At that point, it should be pretty clear what's up. If the above stuff doesn't immediately yield an answer, I reread the problem and check to make sure I really put down all equations that could be relevant.
I have no advise about how to learn better from lecture. Most of the time I find my physics lecturers to be not very useful. It's usually only after studying the textbook for a long time that I will understand fully what they are getting at in any given lecture.
As for strategies for reading books, my chief one is look for examples problems. After reading a section, make sure that you can, by apply the methods you just learned, work the example problems and get the same answers as the book. Don't just guess that you've understood the material, you have the tools to know definitively whether or not you do.
As for tests, my only advise is do practice problems similar to those you figure will be on the test until you can complete them easily. That takes me a very long time usually.

I generally spend a lot more time doing problem sets than my peers and I have to study for a lot longer than they do too. But in the end I usually get really high grades and understand the material, while my peers seem mostly to achieve neither of those goals.

Anyhow, even when I struggle in physics, it's worth remembering how bad ass physics is. When you're sitting in your room memorizing equations or doing problems, you are actually learning how to describe phenomena around you in a really precise and remarkable way. I let that fact cause me to actively enjoy studying physics, which in turn makes doing problem sets and studying for tests fairly enjoyable instead of just being a chore.
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Esther Pockfield - Wed, 26 Feb 2014 07:23:57 EST ID:bbfswP/G No.74264 Ignore Report Quick Reply
OP here, this is good stuff. Is there anyone here, that's been in the same boat as me that's been able to turn things around?

I've started using some of this stuff and I think it's working, but I'd like to know if anyone has fully implemented some of these methods and gotten great success.
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Shit Hanningfitch - Fri, 28 Feb 2014 12:50:23 EST ID:+emCTmhw No.74269 Ignore Report Quick Reply
Okay, here are some tips that will help you.
1) Study more
2) Exercise everyday for at least 30 minutes. If you do it and enjoy to do it you have something which is both recreational and good for your mind as well.
3a) Aim high
3b) Don't be sad or angry on failure: Be responsible, learn from the mistakes and move on.
4) Study less if you do it too much. (you really shouldn't work more than 50/h a week; it really drains your capacity in creative thinking as you haven't had the change to relax)
5) Eat and sleep well.
6) You should keep a dairy as it is just as useful to your life as a lab journal is to laboratory work.

> it's worth remembering how bad ass physics is
I can't feel the awesomeness any more, sadly. I'm seriously trying not to be apathetic as switching to an other major is not meant for me (well maybe except mathematics).
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Hedda Bardwill - Sat, 01 Mar 2014 19:02:21 EST ID:oEUrABfb No.74271 Ignore Report Quick Reply
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>>74269
All of that is really sound advice.

I don't look at physics as a chore or a job and I love every moment I spend working on it. Even though I used to think physics was cool, I wasn't super enthusiastic about my readings or class. Then I started doing some research and realized that there is a whole class of people who are just straight up paid to investigate the most minute and fascinating details of how phenomena occur. Taking a lot of psychedelics and reading feynman also helped.
Anyhow all the class work until your employment is catching you up to the extremely advanced state that physics is at currently. It's not just bullshit so you can get a diploma to get some meaningless job.

On a related note, I'd advise anybody interested in theoretical physics take some computer science classes.
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Phoebe Pishstudge - Mon, 03 Mar 2014 12:52:48 EST ID:exddm3e0 No.74272 Ignore Report Quick Reply
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>>74271
If I had lived in previous centuries, I would have voluntarily been enslaved if I was promised the chance to be in a position to study physics. I'm taking it now because I can, and as far as I'm concerned it's not the means to an end. Jobs be damned. If I accidentally find myself in a position to work with everything I've got, great. Working a shitty job to pay off loans would be just as worth it, because I've got what I wanted.


Isolated brain. by Caroline Dullykodging - Mon, 17 Feb 2014 23:17:39 EST ID:SiW1yrUX No.74223 Ignore Report Reply Quick Reply
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We've come along day from the days of Sergey Bryukhonenko's headless dog living on a heart and lung machine.

We've seen a guinea pig's whole brain be kept alive for a work day in nothing more than "sugar, electrolytes and dissolved oxygen (among other ingredients) directly into one of its vertebral arteries."

The first "continuous flow" device was created to keep Craig Lewis alive without a heart beat for 5 full weeks.

Now new advances herald a "fully implantable artificial lung" to completely replace the need for a biological lung.

How close are we to keeping an isolated brain alive?
How long before that brain would decay and die?
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Phyllis Soddlehan - Tue, 18 Feb 2014 20:27:02 EST ID:zJ9ZvMz5 No.74230 Ignore Report Quick Reply
>die and decay*
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Nathaniel Nickleway - Sat, 22 Feb 2014 15:27:37 EST ID:zDpURM3Q No.74243 Ignore Report Quick Reply
no clue, its interesting though.
A live brain would be best for study correct?
one of you should get on this.
(goes back to b)
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Hugh Hoddletore - Sun, 23 Feb 2014 16:41:37 EST ID:qu3S+nHq No.74247 Ignore Report Quick Reply
It's an interesting question. I have nothing of substance to contribute to it though but this really cool video on head transplants.

https://www.youtube.com/watch?v=V2P-teoc2ic
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Lillian Buvingsat - Mon, 24 Feb 2014 05:40:52 EST ID:C4dImbqc No.74252 Ignore Report Quick Reply
>>74230

From a neurological perspective, he could mean the decay of neural connections, and not decomposition. Though it is not farfetched to find differing rates of decomposition on the subject, and parts of the brain dying in sequence, rather than in unison.
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Beatrice Ceblingchodge - Sat, 01 Mar 2014 01:31:24 EST ID:LQW5+bIr No.74270 Ignore Report Quick Reply
sooo... any clues onto current trends on the subject?


Easy LaTeX by Charlotte Trotshit - Wed, 26 Feb 2014 15:26:59 EST ID:/qWq4xpd No.74265 Ignore Report Reply Quick Reply
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My prof wants us to write our assignment in LaTeX, and it's due Friday. Do any of you wonderful lads know a really easy way to get something written in latex without actually dealing with all the code? Thanks in advance.
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Samuel Pittwell - Thu, 27 Feb 2014 03:55:08 EST ID:IL2+LJnd No.74266 Ignore Report Quick Reply
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lyx
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Charlotte Billingwill - Thu, 27 Feb 2014 14:43:04 EST ID:oGaTQY6B No.74268 Ignore Report Quick Reply
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>>74266
Exactly the sort of thing I was looking for. I'll probably learn to do it the hard way as well, but it's comforting to have this as an option. I might start writing all my assignments and labs this way. Not only for the nice appearance but so I'll have an incentive to start much earlier. Thanks. nb


Starting from scratch by Thomas Grimway - Mon, 24 Feb 2014 22:22:41 EST ID:XfuN5sQx No.74257 Ignore Report Reply Quick Reply
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I'm 21. By my junior year in high school I burnt out, stayed in for my diploma and went to college the next year (what was I thinking?). It's been almost 4 years since I left college and I want to independently study chemistry, math, philosophy, and music/art before I decide to return to college. Chemistry is the subject I'm most interested in, yet have the most difficulty with. If you stuck with me, thank you, for those that didn't:

TL;DR: How do I learn to chemistry?

pic kinda related. I think lsd is cool.
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Lillian Nondergold - Tue, 25 Feb 2014 04:24:58 EST ID:iy2BXZ7j No.74259 Ignore Report Quick Reply
>>74257
http://www.chemguide.co.uk/
https://www.khanacademy.org/science/chemistry
https://www.khanacademy.org/science/organic-chemistry
https://www.coursera.org/course/chem99 (No sessions available yet)

What's your level of math and why do you want to learn it? Khan Academy has a lot of math videos too.
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Thomas Grimway - Tue, 25 Feb 2014 07:22:40 EST ID:XfuN5sQx No.74261 Ignore Report Quick Reply
>>74259
I can't calculus. The last math class I took was a calc class and I failed. I just want to feel like I get math.
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Lillian Nondergold - Tue, 25 Feb 2014 09:50:46 EST ID:iy2BXZ7j No.74262 Ignore Report Quick Reply
>>74261
Well calculus uses limits, sums, log and trig functions, lots of algebraic manipulation, so perhaps you failed because you didn't know those.
In my opinion, the only way to get math is to work problems, a lot of them.

Here's a few links:
http://www.mathsisfun.com/ (eg: http://www.mathsisfun.com/calculus/introduction.html )
http://www.purplemath.com/modules/index.htm
http://17calculus.com/
http://betterexplained.com/articles/a-gentle-introduction-to-learning-calculus/
http://tutorial.math.lamar.edu/

Calculus problems:
https://www.math.ucdavis.edu/~kouba/ProblemsList.html
(Try to really understand the solutions of the problems you can't do)
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Thomas Grimway - Tue, 25 Feb 2014 17:24:59 EST ID:XfuN5sQx No.74263 Ignore Report Quick Reply
Thanks Lillian Nondergold


Stem cells by Rebecca Blackbanks - Wed, 29 Jan 2014 13:36:01 EST ID:04U114ma No.74114 Ignore Report Reply Quick Reply
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Can stem cells give me a new foreskin?
17 posts and 2 images omitted. Click Reply to view.
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Frederick Dartfoot - Fri, 14 Feb 2014 22:14:52 EST ID:f0IUAo3s No.74203 Ignore Report Quick Reply
>>74199
Actually you're right. Dr. Kellogg (creator of Kellogg's cornflakes) promoted, popularized, and recommended circumcision (tight circumcision, too) as a means to prevent (cure) masturbation in boys in the turn of the century. To this day I don't eat cornflakes or kellogs stuff
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Rusty - Sat, 15 Feb 2014 13:59:04 EST ID:LzlKZhn9 No.74207 Ignore Report Quick Reply
>>74203 That statement alone was enough for me to never eat cornflakes again.
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Barnaby Bettingdag - Thu, 20 Feb 2014 19:21:06 EST ID:M/3tE5vy No.74234 Ignore Report Quick Reply
>>74114
Hey, I've still got a dick, and it takes me 3 billion Earth-years to bust a nut, so I'm not here to complain about being circumsized.
>>
Charles Denkinmud - Fri, 21 Feb 2014 02:26:24 EST ID:Z5EeckPo No.74235 Ignore Report Quick Reply
>>74234
what about when you want to bust a quick nut though?

>this nig's speed record is <2min
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Beatrice Clommerman - Sat, 22 Feb 2014 16:28:48 EST ID:MAjTZ5i6 No.74244 Ignore Report Quick Reply
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>>74235
my little captain still wears his hat

and sometimes the nut just busts it self like 45sec maybe

My lady likes to make me not masturbate for a day or two then she sex's me up good and i just release in moments. . its quick and very passionate and she likes to do it just for her own fun not cum. . then i wait five minutes and fuck her for 30mins its crazy like me i guess


Biological immortality. by Whitey Blatherfuck - Tue, 28 Jan 2014 11:53:00 EST ID:hF9tAYUV No.74092 Ignore Report Reply Quick Reply
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http://www.forbes.com/sites/alexknapp/2012/03/18/the-first-immortal-does-not-live-among-us-today/
I know the article is outdated, but it was one I could actually understand

According to this article, the first immortal human won't be alive during our lifetimes, this is based not he assumption that we would achieve immortality via clones of ourselves, using "brain transplants" and possibly "uploading consciousness". It further goes on to describe how the social implications of these aforementioned tasks would make the process controversial and possibly illegal.

But as we know the media is almost consistently wrong about technology and the future of it., Often times making haphazard claims against budding technologies.

Some loopholes include the fact that we're capable of cloning humans already, that you could switch bodies with a clone that's at least 6 years of age (considering cranial cavity growth) and simply grow with it. and that there have been studies that show you can bypass the spinal cord and use brain implants to move body parts, as opposed to reconnecting everything perfectly

What is /chem/'s opinion on the matter of hypothetical biological immortality?
Specifically, if it's possible and how they would go about doing it, (not so much the moral aspects)
6 posts omitted. Click Reply to view.
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Edward Sillertan - Sun, 02 Feb 2014 20:21:22 EST ID:8zPXOwFz No.74152 Ignore Report Quick Reply
>>74092 No immortality, its God territory. You can't make the elixir of life without destroying a life in the process. I know how to make one by science but I refuse to tell people how.
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Cornelius Wonningspear - Fri, 07 Feb 2014 17:15:55 EST ID:rX4R5lJh No.74168 Ignore Report Quick Reply
what about the immune response to the foreign brain?
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Cornelius Wonningspear - Fri, 07 Feb 2014 17:34:16 EST ID:rX4R5lJh No.74169 Ignore Report Quick Reply
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>>74168
I'm a fucking retard disregard that post
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Jack Docklefig - Fri, 21 Feb 2014 16:54:38 EST ID:Krkw5Mzp No.74239 Ignore Report Quick Reply
>>74152
You should tell me how.
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Hannah Bronningbanks - Fri, 21 Feb 2014 22:22:12 EST ID:IL2+LJnd No.74240 Ignore Report Quick Reply
>>74131
>The body does this through DNA methylation as well as others. The problem is that once the DNA is altered like that it is hard to reverse.
Huh? The mechanisms for DNA demethylation are already present in mammals. It's not as if it doesn't even happen in nature.


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