bright star tek questions View Thread Reply Hide Ernest Duckson - Thu, 13 Sep 2018 13:45:15 EST HJwBSxjU No.79229 File: 1536860715304.gif -(1043B / 1.02KB, 512x73) Thumbnail displayed, click image for full size. One is left with impure methylamine. The stuff includes ammonia chloride. Is this fine? Is one to assume that when using the adulterated methylamine in later reaction that the ammonia chloride wont matter? Step 3 says to "flood the reaction contents with 1.5 L of slightly acidic water"Mix in what container? Largest container called for is 1000ml RBF >> Clara Chugglespear - Mon, 22 Oct 2018 19:59:29 EST g2RTfgmx No.79264 Reply >>79229Or i could just buy mdma off the derp web
>> Clara Chugglespear - Mon, 22 Oct 2018 19:59:29 EST g2RTfgmx No.79264 Reply >>79229Or i could just buy mdma off the derp web
Reducing 3,4,5-trimethoxy-beta-nitrostryrene to mescaline View Thread Reply Hide Matilda Bomblehit - Wed, 13 Jun 2018 11:03:55 EST rajg/xs8 No.79145 File: 1528902235968.png -(5534B / 5.40KB, 460x300) Thumbnail displayed, click image for full size. I want to reduce 3,4,5-trimethoxy-beta-nitrostyrene to the amine. What will do this? I've found so much worthless and bullshit information. It seems the main options are: Zn/HCl or Fe/HCl. I don't know if this goes from the nitrostyrene to the amine or if I need to use NaBH4 to first reduce the double bond. Also, some people say the yields are good and others say the yields are shit.2. LAH. Not an option.3. SnCl2 to reduce the nitrostyrene to an oxime and then Zn to reduce the oxime to the amine. I've never found proof of anyone doing this reaction on nitrostyrenes. SnCl2 is good for reducing nitropropenes but who knows if that applies to nitrostyrenes.4. Al/Hg. Literally toxic. I haven't found any reports of people using the less toxic Al/Ga or Al/Cu amalgam. I also get conflicting information saying Al/Hg reduces directly to the amine, yet others are saying NaBH4 must be used to first reduce the double bond and then the Al/Hg reaction can be run to reduce the nitro group to an amine -- which is it?Any input would be appreciated, especially from people who have actually run these reactions on this particular substrate. 3 posts omitted. Click View Thread to read. >> Samuel Turveydock - Wed, 22 Aug 2018 20:39:00 EST zbIVdkqy No.79215 Reply >>79148pushing it through a pad of celite or silica would help but honestly there isnt any reason to go with mg or tinochem portal has a page dedicated to conjugated nitro reductions... >> Martin Drablingville - Thu, 23 Aug 2018 15:55:31 EST quGHpYNb No.79217 Reply Zn/HCl is the method of choice for terminal nitrostyrenes, but it fails for nitropropenes. Fe/HCl gives carbonyl compounds which you don't want. Make sure your zinc is good. >> Bombastus Werrywag - Sat, 20 Oct 2018 04:35:52 EST L5efXmCV No.79258 Reply >>79217double bond may prevent the latter but either sources of hydrogen should work. then introduce it with palladium on carbon under a little party balloon to give you the pressure required to hydrogenate that 2nd position
>> Samuel Turveydock - Wed, 22 Aug 2018 20:39:00 EST zbIVdkqy No.79215 Reply >>79148pushing it through a pad of celite or silica would help but honestly there isnt any reason to go with mg or tinochem portal has a page dedicated to conjugated nitro reductions...
>> Martin Drablingville - Thu, 23 Aug 2018 15:55:31 EST quGHpYNb No.79217 Reply Zn/HCl is the method of choice for terminal nitrostyrenes, but it fails for nitropropenes. Fe/HCl gives carbonyl compounds which you don't want. Make sure your zinc is good.
>> Bombastus Werrywag - Sat, 20 Oct 2018 04:35:52 EST L5efXmCV No.79258 Reply >>79217double bond may prevent the latter but either sources of hydrogen should work. then introduce it with palladium on carbon under a little party balloon to give you the pressure required to hydrogenate that 2nd position
Naltrexone -> Oxymorphone? View Thread Reply Hide Hamilton Beggleshit - Thu, 17 Mar 2016 18:16:02 EST GksK9UMc No.77752 File: 1458252962747.png -(55460B / 54.16KB, 992x379) Thumbnail displayed, click image for full size. Dear /chem/,wikipedia cites that "Naltrexone can be described as a substituted oxymorphone – here the tertiary amine methyl-substituent is replaced with methylcyclopropane. Naltrexone is the N-cyclopropylmethyl derivative of oxymorphone."Is it possible to revert naltrexone back to oxymorphone? If so, how? My very limited understanding of organic chemistry leads me to believe that naltrexone could, in proper solution and (probably) with the addition of heat, be broken into oxymorphone and cyclopropylmethylbromide. (pic related)Any input regarding said (hypothetical) reaction will be greatly appreciated! 10 posts and 2 images omitted. Click View Thread to read. >> Alice Honeyhall - Mon, 09 Jul 2018 03:51:31 EST mH/x48p3 No.79163 Reply >>79162Cyclopropanes are very unstable but the one pictured with a stabilized alkane group is not. This group shown with an R-cyclopropane is relatively stable.Carbon-carbon chemistry is very hard. Even harder to do selectively. Short answer is most likely, no. >> Edwin Clarryforth - Tue, 18 Sep 2018 23:44:00 EST y5OCfqyd No.79231 Reply >>79163The cyclopropylmethyl can be turned into isobutyl via palladium under hydrogen. How hard would it be to remove it then? >> Pressbastus - Sat, 20 Oct 2018 04:33:55 EST L5efXmCV No.79257 Reply >>77752oh yeah how have we been going with this? OP did you make any significant literature readings or apply common reactions to make this even remotely practical?
>> Alice Honeyhall - Mon, 09 Jul 2018 03:51:31 EST mH/x48p3 No.79163 Reply >>79162Cyclopropanes are very unstable but the one pictured with a stabilized alkane group is not. This group shown with an R-cyclopropane is relatively stable.Carbon-carbon chemistry is very hard. Even harder to do selectively. Short answer is most likely, no.
>> Edwin Clarryforth - Tue, 18 Sep 2018 23:44:00 EST y5OCfqyd No.79231 Reply >>79163The cyclopropylmethyl can be turned into isobutyl via palladium under hydrogen. How hard would it be to remove it then?
>> Pressbastus - Sat, 20 Oct 2018 04:33:55 EST L5efXmCV No.79257 Reply >>77752oh yeah how have we been going with this? OP did you make any significant literature readings or apply common reactions to make this even remotely practical?
Organic chemistry View Thread Reply Hide Reuben Hurringnat - Tue, 16 Jan 2018 12:06:23 EST uUZ+g3Ph No.78973 File: 1516122383293.png -(1031741B / 1007.56KB, 1334x750) Thumbnail displayed, click image for full size. What's the best way to learn organic synthesis outside of picking up a text book?Any online courses or videos out there? 1 posts omitted. Click View Thread to read. >> Katsuragi !/pe1aKvMmQ - Thu, 24 May 2018 22:02:34 EST 4Q6JexVr No.79127 Reply >>78973https://youtu.be/l-9iUpFGbxE >> Rebecca Dranningbane - Tue, 16 Oct 2018 23:43:26 EST wRB//qcg No.79247 Reply >>78973Sauce? >> Alice Packlelone - Wed, 17 Oct 2018 14:36:56 EST 3wTRifUB No.79248 Reply >>79127How is that link relevant?
>> Katsuragi !/pe1aKvMmQ - Thu, 24 May 2018 22:02:34 EST 4Q6JexVr No.79127 Reply >>78973https://youtu.be/l-9iUpFGbxE
>> Alice Packlelone - Wed, 17 Oct 2018 14:36:56 EST 3wTRifUB No.79248 Reply >>79127How is that link relevant?
4fmph View Thread Reply Hide Caroline Hunningsat - Thu, 20 Sep 2018 17:02:33 EST JsuSKLxG No.79232 File: 1537477353525.png -(109613B / 107.04KB, 680x448) Thumbnail displayed, click image for full size. Can I turn all this 4F-MPH, this 4fluoro-methylphenidate, into plain old methylphenidate (Ritalin) ? For studying? Assume ive dabbled extensively in kitchen chemistry (assume I'm not as feeble in the lab as I am in the psychiatrist offices) i know its a long shot and im pretty much asking for my work to be done for me but what the hell. the man is on a mission to go back to school 1 posts omitted. Click View Thread to read. >> Lillian Cogglehack - Thu, 27 Sep 2018 19:46:25 EST xsneeAgl No.79236 Reply >>79235Op hereIm willing to be a good chemist with unlimited resources could do it.... >> Name - Thu, 27 Sep 2018 19:47:34 EST xsneeAgl No.79237 Reply >>79236*bet >> William Brinkinwick - Thu, 27 Sep 2018 22:42:23 EST oKyR6MUr No.79238 Reply 1538102543388.jpg -(7299B / 7.13KB, 201x200) Thumbnail displayed, click image for full size. Fluorine is the most electronegative element. It grabs on to shit and doesn't let go. It's almost certainly possible to do what you're asking, but not necessarily in a one step reaction, and certainly not easily
>> Lillian Cogglehack - Thu, 27 Sep 2018 19:46:25 EST xsneeAgl No.79236 Reply >>79235Op hereIm willing to be a good chemist with unlimited resources could do it....
>> William Brinkinwick - Thu, 27 Sep 2018 22:42:23 EST oKyR6MUr No.79238 Reply 1538102543388.jpg -(7299B / 7.13KB, 201x200) Thumbnail displayed, click image for full size. Fluorine is the most electronegative element. It grabs on to shit and doesn't let go. It's almost certainly possible to do what you're asking, but not necessarily in a one step reaction, and certainly not easily
OTC Nonpolar Solvent View Thread Reply Hide Graham Bunfoot - Thu, 07 Jun 2018 01:15:44 EST 3wTRifUB No.79140 File: 1528348544368.png -(9674B / 9.45KB, 83x80) Thumbnail displayed, click image for full size. What's something pure and reliable I can use a nonpolar solvent that I can quickly buy? 4 posts omitted. Click View Thread to read. >> Archie Duckstone - Tue, 21 Aug 2018 23:01:05 EST zbIVdkqy No.79214 Reply >>79142why do you want freebase? >> Martin Drablingville - Thu, 23 Aug 2018 15:57:14 EST quGHpYNb No.79218 Reply I don't know what the fuck you can buy but the standard answers are "acetone", "methyl ethyl ketone", "dichloromethane", "toluene" and "petroleum ether", in decreasing order of polarity. Some distillation may be required. >> Martin Drablingville - Thu, 23 Aug 2018 15:58:06 EST quGHpYNb No.79219 Reply >>79218based on your other reply, DCM is the best choice here, or MEK or toluene. pet ether is too weakly solvating and acetone is too polar.
>> Archie Duckstone - Tue, 21 Aug 2018 23:01:05 EST zbIVdkqy No.79214 Reply >>79142why do you want freebase?
>> Martin Drablingville - Thu, 23 Aug 2018 15:57:14 EST quGHpYNb No.79218 Reply I don't know what the fuck you can buy but the standard answers are "acetone", "methyl ethyl ketone", "dichloromethane", "toluene" and "petroleum ether", in decreasing order of polarity. Some distillation may be required.
>> Martin Drablingville - Thu, 23 Aug 2018 15:58:06 EST quGHpYNb No.79219 Reply >>79218based on your other reply, DCM is the best choice here, or MEK or toluene. pet ether is too weakly solvating and acetone is too polar.
What makes atoms do what they do? View Thread Reply Hide Matilda Hassleway - Sat, 10 Mar 2018 11:49:56 EST PTghO7Nx No.79012 File: 1520700596496.jpg -(161331B / 157.55KB, 639x999) Thumbnail displayed, click image for full size. Sup /chem/,There is a fundamental gap in my understanding of the universe. When we look out into the sky and see the sun and stars, measure the Earth orbiting the sun, or see a volcano, it is commonly accepted that eventually, all of these processes will run out of energy and cease to do their thing. However every atom in the universe has positive and negative charges, with the negatively charged particles constantly in motion (and i guess the positive ones too if we count vibration or whatever). How do subatomic particles get a charge in the first place? Will it ever wear off? What makes electrons move? Will an electron ever stop moving and become neutrally charged? Can we apply this seemingly infinite source of subatomic energy to the macro scale to prevent a big freeze or one day generate limitless energy? 36 posts and 4 images omitted. Click View Thread to read. >> trypto - Sun, 19 Aug 2018 13:29:31 EST OdR7meD+ No.79210 Reply >>79209To recap: At this point, the long-held theory that light is a wave was being challenged by a bunch of experiments/models.And then, while trying to figure that shit out, a bunch of experiments/models suddenly showed that MATTER is a wave.This is still really only the preamble to quantum mechanics, and it's where the math starts to get more intense. Until this point, the math involved was pretty much calculus and differential equationsThe next big experiment would be the one that hippies and armchair philosophers love, which is the variation of the double-slit experiment where observation changes the expected outcome. People try to extrapolate so much metaphysical bullshit with this experiment, and I hate it. Yes, it's an amazing result. yes, the math is deep and profoundly alters how we view reality or truth itself. But at the same time, it's simply a mathematical model that's describing what we see. And then we call it reality. It's boring.IF I do another post, I'll try to explain this experiment, the math it spawned, and the (legit) philisophical interpretations. This is where linear algebra comes into play, infinite arrays, the schrodinger equation, imaginary numbers, wave equations, and more. IMO, it's the point where "quantum weirdness" becomes solved for the most part. There's some philisophical differences of opinion, but they're not too important. >> trypto - Sun, 19 Aug 2018 13:35:45 EST OdR7meD+ No.79211 Reply >>79207>A positive charge interacts with a positive charge differently than a negative charge interacts with a negative charge.Also, fuck. This should be "A positive charge interacts with a positive charge diferferently than a POSTIVE charge interacts with a negative charge".Of course, P-P interactions are identical to N-N interactions. >> trypto - Sun, 19 Aug 2018 13:48:46 EST OdR7meD+ No.79212 Reply >>79210> IMO, it's the point where "quantum weirdness" becomes solved for the most part. There's some philisophical differences of opinion, but they're not too important. Oh yeah, and of course special relativity/gravity is still an open question in regards to quantum-scale. Blefht. I'm done. These rambling posts brought to you by Bush. Breakfast of champions.
>> trypto - Sun, 19 Aug 2018 13:29:31 EST OdR7meD+ No.79210 Reply >>79209To recap: At this point, the long-held theory that light is a wave was being challenged by a bunch of experiments/models.And then, while trying to figure that shit out, a bunch of experiments/models suddenly showed that MATTER is a wave.This is still really only the preamble to quantum mechanics, and it's where the math starts to get more intense. Until this point, the math involved was pretty much calculus and differential equationsThe next big experiment would be the one that hippies and armchair philosophers love, which is the variation of the double-slit experiment where observation changes the expected outcome. People try to extrapolate so much metaphysical bullshit with this experiment, and I hate it. Yes, it's an amazing result. yes, the math is deep and profoundly alters how we view reality or truth itself. But at the same time, it's simply a mathematical model that's describing what we see. And then we call it reality. It's boring.IF I do another post, I'll try to explain this experiment, the math it spawned, and the (legit) philisophical interpretations. This is where linear algebra comes into play, infinite arrays, the schrodinger equation, imaginary numbers, wave equations, and more. IMO, it's the point where "quantum weirdness" becomes solved for the most part. There's some philisophical differences of opinion, but they're not too important.
>> trypto - Sun, 19 Aug 2018 13:35:45 EST OdR7meD+ No.79211 Reply >>79207>A positive charge interacts with a positive charge differently than a negative charge interacts with a negative charge.Also, fuck. This should be "A positive charge interacts with a positive charge diferferently than a POSTIVE charge interacts with a negative charge".Of course, P-P interactions are identical to N-N interactions.
>> trypto - Sun, 19 Aug 2018 13:48:46 EST OdR7meD+ No.79212 Reply >>79210> IMO, it's the point where "quantum weirdness" becomes solved for the most part. There's some philisophical differences of opinion, but they're not too important. Oh yeah, and of course special relativity/gravity is still an open question in regards to quantum-scale. Blefht. I'm done. These rambling posts brought to you by Bush. Breakfast of champions.
Molecule View Thread Reply Hide Lillian Dorrypedge - Fri, 13 Jul 2018 12:51:01 EST 1xukUjeD No.79170 File: 1531500661281.png -(11786B / 11.51KB, 505x503) Thumbnail displayed, click image for full size. Hey guys, so I am helping someone out with there organic chem class. They have to write a syntesis for this molecule.my question is,what is the IUPAC name for this molecule?I can't find it online when I try the molecular formula or draw it. >> trypto - Sat, 14 Jul 2018 16:27:22 EST OdR7meD+ No.79174 Reply >>79170Is that shit real? I could see it with cyclohexane, but with a benzene ring? Looks like way too much strain. If it's real, I bet it's extremely fragile.3,5-somethingoxysomething-aniline >> p - Mon, 16 Jul 2018 13:40:49 EST N1w1NO9M No.79177 Reply concerning the synthesisthis is some pretty whack shit. you can even synth superphane but this would be way too much strain on the sp2 carbons of the benzene.theoretically speaking its an 5-amino anhydride derivative of isophthalic acid, my best guess is that its an exercise aimed at the nomenclature or bicyclocompounds or rather heterocycles. could you double check if you got that structure right? >> Nell Binnerman - Mon, 23 Jul 2018 22:46:55 EST hBAZGxou No.79189 Reply you can't put an anhydride and an unsubstituted amine in the same moleculeyou can't link meta-separated benzene substituents unless you make an 8-or-more membered ring, because otherwise you're violating bredt's rulethat said, the compound you've drawn could be called 3-amino-6,8-dioxo-7-oxabicyclo[3.3.1]nona-1,3,9-triene. but it is impossible.
>> trypto - Sat, 14 Jul 2018 16:27:22 EST OdR7meD+ No.79174 Reply >>79170Is that shit real? I could see it with cyclohexane, but with a benzene ring? Looks like way too much strain. If it's real, I bet it's extremely fragile.3,5-somethingoxysomething-aniline
>> p - Mon, 16 Jul 2018 13:40:49 EST N1w1NO9M No.79177 Reply concerning the synthesisthis is some pretty whack shit. you can even synth superphane but this would be way too much strain on the sp2 carbons of the benzene.theoretically speaking its an 5-amino anhydride derivative of isophthalic acid, my best guess is that its an exercise aimed at the nomenclature or bicyclocompounds or rather heterocycles. could you double check if you got that structure right?
>> Nell Binnerman - Mon, 23 Jul 2018 22:46:55 EST hBAZGxou No.79189 Reply you can't put an anhydride and an unsubstituted amine in the same moleculeyou can't link meta-separated benzene substituents unless you make an 8-or-more membered ring, because otherwise you're violating bredt's rulethat said, the compound you've drawn could be called 3-amino-6,8-dioxo-7-oxabicyclo[3.3.1]nona-1,3,9-triene. but it is impossible.
Secret unwatched meth precursor cartels are using tha nobody knows about! View Thread Reply Hide David Brandletadge - Thu, 12 Jul 2018 11:36:25 EST AEosv4I7 No.79165 File: 1531409785030.jpg -(26144B / 25.53KB, 630x333) Thumbnail displayed, click image for full size. They use a ketone nobody knows about called "ADDS"It's not on any list so you can order a million gallons from China easily 1 posts omitted. Click View Thread to read. >> David Brandletadge - Thu, 12 Jul 2018 15:02:35 EST AEosv4I7 No.79168 Reply >>79166you wont find this on google my friend. >> Charlotte Blembleshaw - Thu, 12 Jul 2018 22:09:24 EST IsgjdvUw No.79169 Reply I'm having a hard time picturing cartels sweating chemical watchlists. Let's say it's true. It would realistically have to come from one source and have one consumer for it to remain a secret and it would be easily traceable in a way that diverted chemicals would not. Also unless it was an in-house operation I don't think there would be much of a price advantage. No, I think you're full of shit. >> trypto - Mon, 23 Jul 2018 20:01:21 EST OdR7meD+ No.79188 Reply If nobody knows about it, then how do you know about it?
>> David Brandletadge - Thu, 12 Jul 2018 15:02:35 EST AEosv4I7 No.79168 Reply >>79166you wont find this on google my friend.
>> Charlotte Blembleshaw - Thu, 12 Jul 2018 22:09:24 EST IsgjdvUw No.79169 Reply I'm having a hard time picturing cartels sweating chemical watchlists. Let's say it's true. It would realistically have to come from one source and have one consumer for it to remain a secret and it would be easily traceable in a way that diverted chemicals would not. Also unless it was an in-house operation I don't think there would be much of a price advantage. No, I think you're full of shit.
>> trypto - Mon, 23 Jul 2018 20:01:21 EST OdR7meD+ No.79188 Reply If nobody knows about it, then how do you know about it?
little Water CWE View Thread Reply Hide Matilda Crinkinpotch - Sat, 21 Jul 2018 08:35:39 EST CE1aGD0g No.79187 File: 1532176539983.jpg -(38759B / 37.85KB, 530x530) Thumbnail displayed, click image for full size. Hiit's been a milltion years since i've done a CWE and there's one question i have in regards to the amoung of water to be used.i understand that there is always going to be a little Acetaminophen in the final solution. however, codeine phosphate being as soluble in cold water, or just plain water, as it is i was wondering wether you could skip the whole freezing part of the procedure and instead use a small amount of water. where would potential problems be? i can imagine it would take a really long time as the water would have problems penetrating through the sludge of filter and Paracetamol. but apart from that why could this be a bad idea?thanks for reading,love Anonpicture unrelated
test kits for common adulterants View Thread Reply Hide Emma Mevinglot - Tue, 17 Jul 2018 08:59:13 EST FIrMW5oZ No.79182 File: 1531832353252.jpg -(62355B / 60.89KB, 670x605) Thumbnail displayed, click image for full size. if i wanted to start a small business where i test people's drugs for fent/pcp/meth/clam or whatever, what sort of reagents would i need to buy? I realize this is sort of an open ended question, i'm just sort of looking for general suggestions for pretty much any drug testing reagent that tests for something. there's pretty much nowhere that you can safely get your drugs tested around where i live & i really want to do what i can to help. i feel like i could save some lives with this.especially looking for something that can detect if my jenk's been cut with dog pills >> pr - Thu, 19 Jul 2018 02:27:18 EST N1w1NO9M No.79185 Reply are you sure its legal in your country to have a ton of people sending you what in fact are free drugs?dunno, buncha tlc plates, solvents out the ass, colour reagents or their components- whichever is cheaper- a fridgeand if youre into endgame shit a GC/MS setup >> Caroline Dullygold - Thu, 19 Jul 2018 11:27:47 EST FIrMW5oZ No.79186 Reply >>79185i don't know how above board this business will be, but i'm in a pretty lenient part of america drug wise so i doubt i'd get in much trouble for people sending me small samples for chemical analysis. also is there any reagent/combination of reagents i can use to test for different benzodiazepines? from my initial googling it doesn't seem very easy but i would really like to be able to tell people if their xans were cut with clam or flam etc
>> pr - Thu, 19 Jul 2018 02:27:18 EST N1w1NO9M No.79185 Reply are you sure its legal in your country to have a ton of people sending you what in fact are free drugs?dunno, buncha tlc plates, solvents out the ass, colour reagents or their components- whichever is cheaper- a fridgeand if youre into endgame shit a GC/MS setup
>> Caroline Dullygold - Thu, 19 Jul 2018 11:27:47 EST FIrMW5oZ No.79186 Reply >>79185i don't know how above board this business will be, but i'm in a pretty lenient part of america drug wise so i doubt i'd get in much trouble for people sending me small samples for chemical analysis. also is there any reagent/combination of reagents i can use to test for different benzodiazepines? from my initial googling it doesn't seem very easy but i would really like to be able to tell people if their xans were cut with clam or flam etc
Shake n Bake Meth View Thread Reply Hide Phineas Donningtock - Fri, 15 Jun 2018 05:48:12 EST 3YadM9Z3 No.79147 File: 1529056092937.jpg -(15382B / 15.02KB, 604x438) Thumbnail displayed, click image for full size. Is it really all that dangerous? Is there always a chance that something will go wrong even if you do everything completely right? >> Priscilla Dunnerfoot - Fri, 22 Jun 2018 20:38:19 EST UJwtgXMh No.79149 Reply It's inherently dangerous. The danger is manageable although if you have the discipline and means to do that you're probably just not going to do a fucking shake and bake. >> Graham Greenford - Sat, 14 Jul 2018 00:18:01 EST WtJpoXSk No.79173 Reply Meth is just really bad energy in general, bro. Maybe get into plain amphetamine synth for fun if you really want a stimulant
>> Priscilla Dunnerfoot - Fri, 22 Jun 2018 20:38:19 EST UJwtgXMh No.79149 Reply It's inherently dangerous. The danger is manageable although if you have the discipline and means to do that you're probably just not going to do a fucking shake and bake.
>> Graham Greenford - Sat, 14 Jul 2018 00:18:01 EST WtJpoXSk No.79173 Reply Meth is just really bad energy in general, bro. Maybe get into plain amphetamine synth for fun if you really want a stimulant
General method for determing max/min within a range? View Thread Reply Hide Fucking Bellyburk - Thu, 28 Jun 2018 07:51:21 EST rGLueGvy No.79150 File: 1530186681836.jpg -(16201B / 15.82KB, 500x500) Thumbnail displayed, click image for full size. Does anyone please know of a general way to determine if there's any local max and min *within a set range of X-coordinates*?As we can see, there's a local max somwhere around -1 and a local min somwhere around 3 and none whatsoever in the range 1-2.But how do I prove that there's no local max nor min in that range? 7 posts omitted. Click View Thread to read. >> Simon Sannermutch - Wed, 04 Jul 2018 06:43:52 EST rGLueGvy No.79160 Reply >>79159Thanks a lot! :-) >> Cedric Gussleserk - Mon, 09 Jul 2018 04:18:54 EST ggkjpE8I No.79164 Reply the fact that this thread about mathematics was posted on /chem/ is only further evidence of the genius of my idea of a /stem/ boardhttp://boards.420chan.org/420/res/247062.php >> bress - Fri, 13 Jul 2018 13:01:59 EST DbJ7MA1o No.79171 Reply 1531501319502.jpg -(129931B / 126.89KB, 800x449) Thumbnail displayed, click image for full size. >>79164the fact that youve posted that is further evidence of the genius of the idea to establish a /shill board. naw just kidding.concerning the analytic component of the question, im kinda ashamed it took me this long to think of, you could take the derivative via product rule (not sure if another approach would deliver something more moldable) and then reason examine the zero points of the derivative and second derivative.im a bit confused as to what the actual function is, should it - as mentioned before - be y= sin(x) sin(1/10), the derivative itself will be a sum of two periodic products, meaning youd have to evaluate cases where either both terms are zero or one term is the negative of the other. depending on the range the answer should be given in multiples of some fraction of pi (kirt, tex support when)during my analytics classes giving a numeric answer was a telltale sign of misunderstanding the taskAnd should your task be to prove that the function has a local min/max on a given closed range you could simply show that the function is continous (as a composition of continous functions) and then a local min/max has to exist.
>> Simon Sannermutch - Wed, 04 Jul 2018 06:43:52 EST rGLueGvy No.79160 Reply >>79159Thanks a lot! :-)
>> Cedric Gussleserk - Mon, 09 Jul 2018 04:18:54 EST ggkjpE8I No.79164 Reply the fact that this thread about mathematics was posted on /chem/ is only further evidence of the genius of my idea of a /stem/ boardhttp://boards.420chan.org/420/res/247062.php
>> bress - Fri, 13 Jul 2018 13:01:59 EST DbJ7MA1o No.79171 Reply 1531501319502.jpg -(129931B / 126.89KB, 800x449) Thumbnail displayed, click image for full size. >>79164the fact that youve posted that is further evidence of the genius of the idea to establish a /shill board. naw just kidding.concerning the analytic component of the question, im kinda ashamed it took me this long to think of, you could take the derivative via product rule (not sure if another approach would deliver something more moldable) and then reason examine the zero points of the derivative and second derivative.im a bit confused as to what the actual function is, should it - as mentioned before - be y= sin(x) sin(1/10), the derivative itself will be a sum of two periodic products, meaning youd have to evaluate cases where either both terms are zero or one term is the negative of the other. depending on the range the answer should be given in multiples of some fraction of pi (kirt, tex support when)during my analytics classes giving a numeric answer was a telltale sign of misunderstanding the taskAnd should your task be to prove that the function has a local min/max on a given closed range you could simply show that the function is continous (as a composition of continous functions) and then a local min/max has to exist.
fighting BIG H View Thread Reply Hide Oliver Sittinghat - Thu, 12 Jul 2018 14:51:38 EST N1w1NO9M No.79167 File: 1531421498528.jpg -(150268B / 146.75KB, 720x720) Thumbnail displayed, click image for full size. is kirts novel way of marking big h somehow connected to the fact that i get 502 everytime i try to use my vpn on here? because that'd kind of suck, aubrey.
