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Sulaiman
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[*] posted on 24-8-2018 at 10:19


Slugs and snails were abundant in the garden when we moved in to this house.
the best way to get rid of them is to collect them during wet dark hours,
but beer traps work.
A half-full container of beer attracts slugs in, and they drown ...
after a few days the trap stops working and needs fresh beer,
which is why I stopped using this method,
as I'm not allowed alcohol myself, I'm definitely not treating my enemy to two free beers a week.
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DraconicAcid
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[*] posted on 24-8-2018 at 10:40


Why not? That way they'll be damned as well as dead.



Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Abromination
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[*] posted on 25-8-2018 at 14:00


Quote: Originally posted by The Volatile Chemist  
Abromination, that's a nice little collection going there. I like the vials you're using there - not quite 'chemistry lab spec' but I think they give the collection a nice look - good photo.


Thanks! I got them from a special store called "The Natural Pantry." It has a DIY section for making plant salves and stuff. I saw these vials for making lip balm and thought they would be perfect for vials. They are quite small (and not cheap) buy I got nine of them in a package and they are perfect for displaying chemicals. The bottle was also from Natural Pantry and the vial of copper was full of sand (which I dumped out) when I was on my schools symphonic band's trip in California.
I just made copper oxide and I also have copper tannate from tea, although there isnt enough to fill even a quarter vial.


IMG_3231.JPG - 1.3MBIMG_3232.JPG - 1.2MB




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nimgoldman
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[*] posted on 5-9-2018 at 07:42


UV fluorescence of beta-carbolines harmine and dihydroharmine (harmaline) extracted from P. harmala

DSC_0375.JPG - 177kB
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The Volatile Chemist
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[*] posted on 5-9-2018 at 18:47


That's crazy - Never heard of that. Was it done in a professional lab?



My write-ups are on here...
http://www.MeltThe.Ga or http://ptp.x10.mx
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nimgoldman
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[*] posted on 6-9-2018 at 04:20


Quote: Originally posted by The Volatile Chemist  
That's crazy - Never heard of that. Was it done in a professional lab?


No the fluorescent harmala alkaloids, namely harmine and harmaline, have been extracted from Peganum harmala seeds. It's a simple A/B extraction followed by recrystallization from brine. It can be done at home lab.

I have also isolated harmaline and sythesized tetrahydroharmine hydrochloride based on this paper - tetrahydroharmine glows faintly blue under UV (see picture - I have used it as a eco friendly dye for body painting on a party :) ).

31841496_10215481028926419_8767127492180836352_o.jpg - 101kB

[Edited on 6-9-2018 by nimgoldman]
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[*] posted on 6-9-2018 at 15:47
Donut reaction


I made some 4-amino-5-nitrosouracil recently, by nitrosation of 4-aminouracil with NaNO2/AcOH. The product precipitated and made a nice pink slurry that looked like a glazed donut :)

The preparation of the compound is given here (german), as an intermediate in the synthesis of caffeine. Btw the site is a great resource for amateur organic chemistry.

The reaction:
donut reaction.jpg - 223kB

A typical donut:
pink donut.jpg - 102kB
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SWIM
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[*] posted on 6-9-2018 at 18:37


Quote: Originally posted by nimgoldman  
Quote: Originally posted by The Volatile Chemist  
That's crazy - Never heard of that. Was it done in a professional lab?


No the fluorescent harmala alkaloids, namely harmine and harmaline, have been extracted from Peganum harmala seeds. It's a simple A/B extraction followed by recrystallization from brine. It can be done at home lab.

I have also isolated harmaline and sythesized tetrahydroharmine hydrochloride based on this paper - tetrahydroharmine glows faintly blue under UV (see picture - I have used it as a eco friendly dye for body painting on a party :) ).



[Edited on 6-9-2018 by nimgoldman]


Any central effects from all that skin contact?

If so, I hope they weren't serving Fava bean dip at that party.




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[*] posted on 13-9-2018 at 10:29


Thought this was kind of cool, its the solvent extraction of chlorophyll from willow bark.

IMG_3309.JPG - 1.2MB




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Heptylene
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[*] posted on 13-9-2018 at 14:21


Try to shine long wave UV light on that chlorophyll solution: you'll get a very nice red fluorescence. Speaking of fluorescence I tried some europium(III) oxide recently:

Europium oxide unver UV.JPG - 144kB
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[*] posted on 14-9-2018 at 07:43


Quote: Originally posted by SWIM  
Quote: Originally posted by nimgoldman  
Quote: Originally posted by The Volatile Chemist  
That's crazy - Never heard of that. Was it done in a professional lab?


No the fluorescent harmala alkaloids, namely harmine and harmaline, have been extracted from Peganum harmala seeds. It's a simple A/B extraction followed by recrystallization from brine. It can be done at home lab.

I have also isolated harmaline and sythesized tetrahydroharmine hydrochloride based on this paper - tetrahydroharmine glows faintly blue under UV (see picture - I have used it as a eco friendly dye for body painting on a party :) ).



[Edited on 6-9-2018 by nimgoldman]


Any central effects from all that skin contact?

If so, I hope they weren't serving Fava bean dip at that party.


Nope, it's not absorbed through the skin and even if it was, given the dilution factor the dose would be in the range of tens of micrograms, really not something to MAO enzymes (even the oral dose must be huge to fully inhibit MAO).

We just made few dots and lines here and there :)
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[*] posted on 15-9-2018 at 16:47


Quote: Originally posted by Heptylene  
Try to shine long wave UV light on that chlorophyll solution: you'll get a very nice red fluorescence.


I shined some UV light on it and it dimly flouresed red but it wasnt much. I don't think the light I was using was quite the right frequency though, it was only a few bucks.




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[*] posted on 23-9-2018 at 02:18
My 'new' 14/23 thermometer


Maybe not a particularly pretty picture to most, but it is to me
my old 10/19 (0 to 250 x 2oC) thermometer
next to my 'new' 14/23 (-10 to +350 x 1oC) thermometer


Thermometers.jpg - 675kB
(the readings are different due to environmental changes)

Thanks to DrScrabs
I can now get on with Hg and H2SO4 and kerosene distillations at atmospheric pressure.

(I previously needed a thermocouple in a thermometer pocket/well/adapter, which is OK,
but I like the look of 'real' thermometers,
even though more expensive and less useful)

I have not checked the calibration of the 14/23 thermometer yet.
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[*] posted on 23-9-2018 at 12:41


This is a picture of a sulfur containing mineral I found while walking on the beach. I was looking at the cliff and noticed a large vein of this brown rock with sulfur in it.

505FFFE9-9175-4533-84D4-90C433B3DBAE.jpeg - 1.6MB
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