Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
 Pages:  1  ..  60    62    64  ..  71
Author: Subject: Pretty Pictures (2)
Sulaiman
International Hazard
*****




Posts: 2988
Registered: 8-2-2015
Location: UK ... on extended Holiday in Malaysia
Member Is Online


[*] 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.
View user's profile View All Posts By User
DraconicAcid
International Hazard
*****




Posts: 3535
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline

Mood: Semi-victorious.

[*] 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.
View user's profile View All Posts By User
Abromination
National Hazard
****




Posts: 431
Registered: 10-7-2018
Location: Alaska
Member Is Offline

Mood: 1,4 tar

[*] 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




List of materials made by ScienceMadness.org users:
https://docs.google.com/spreadsheets/d/1nmJ8uq-h4IkXPxD5svnT...
--------------------------------
Elements Collected: H, Li, B, C, N, O, Mg, Al, Si, P, S, Fe, Ni, Cu, Zn, Ag, I, Au, Pb, Bi, Am
Last Acquired: B
Next: Na
--------------
View user's profile View All Posts By User
nimgoldman
National Hazard
****




Posts: 290
Registered: 11-6-2018
Member Is Offline


[*] 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
View user's profile View All Posts By User
The Volatile Chemist
International Hazard
*****




Posts: 1973
Registered: 22-3-2014
Location: 'Stil' in the lab...
Member Is Offline

Mood: Copious

[*] posted on 5-9-2018 at 18:47


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



View user's profile Visit user's homepage View All Posts By User
nimgoldman
National Hazard
****




Posts: 290
Registered: 11-6-2018
Member Is Offline


[*] 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]
View user's profile View All Posts By User
Heptylene
National Hazard
****




Posts: 319
Registered: 22-10-2016
Member Is Offline

Mood: No Mood

[*] 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
View user's profile View All Posts By User
SWIM
International Hazard
*****




Posts: 718
Registered: 3-9-2017
Location: 26 Ancho street
Member Is Offline

Mood: Like a guy who fell off a 10 story building and yells, "So far, so good" all the way down.

[*] 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.




New years' eve I had a shot of Fluorine-18 and spent the evening radiating antimatter.

(Not as cool as it sounds)




View user's profile View All Posts By User
Abromination
National Hazard
****




Posts: 431
Registered: 10-7-2018
Location: Alaska
Member Is Offline

Mood: 1,4 tar

[*] 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




List of materials made by ScienceMadness.org users:
https://docs.google.com/spreadsheets/d/1nmJ8uq-h4IkXPxD5svnT...
--------------------------------
Elements Collected: H, Li, B, C, N, O, Mg, Al, Si, P, S, Fe, Ni, Cu, Zn, Ag, I, Au, Pb, Bi, Am
Last Acquired: B
Next: Na
--------------
View user's profile View All Posts By User
Heptylene
National Hazard
****




Posts: 319
Registered: 22-10-2016
Member Is Offline

Mood: No Mood

[*] 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
View user's profile View All Posts By User
nimgoldman
National Hazard
****




Posts: 290
Registered: 11-6-2018
Member Is Offline


[*] 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 :)
View user's profile View All Posts By User
Abromination
National Hazard
****




Posts: 431
Registered: 10-7-2018
Location: Alaska
Member Is Offline

Mood: 1,4 tar

[*] 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.




List of materials made by ScienceMadness.org users:
https://docs.google.com/spreadsheets/d/1nmJ8uq-h4IkXPxD5svnT...
--------------------------------
Elements Collected: H, Li, B, C, N, O, Mg, Al, Si, P, S, Fe, Ni, Cu, Zn, Ag, I, Au, Pb, Bi, Am
Last Acquired: B
Next: Na
--------------
View user's profile View All Posts By User
Sulaiman
International Hazard
*****




Posts: 2988
Registered: 8-2-2015
Location: UK ... on extended Holiday in Malaysia
Member Is Online


[*] 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.
View user's profile View All Posts By User
Jackson
Hazard to Others
***




Posts: 189
Registered: 22-5-2018
Location: U S of A
Member Is Offline

Mood: :) Happy about new glassware :)

[*] 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
View user's profile View All Posts By User
MrHomeScientist
International Hazard
*****




Posts: 1803
Registered: 24-10-2010
Location: Flerovium
Member Is Offline

Mood: No Mood

[*] posted on 24-9-2018 at 06:38


Quote: Originally posted by Abromination  
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.

If your solution was in a regular glass flask, the glass probably blocked most of the UV. Try shining it directly on the liquid, or using quartz glass (if you have any).
View user's profile Visit user's homepage View All Posts By User
TheMrbunGee
National Hazard
****




Posts: 337
Registered: 13-7-2016
Location: EU
Member Is Online

Mood: Phosphorising

[*] posted on 24-9-2018 at 07:57


Capture.PNG - 1.2MB


VIDEO!




View user's profile Visit user's homepage View All Posts By User
weilawei
Hazard to Others
***




Posts: 130
Registered: 3-12-2017
Member Is Offline

Mood: No Mood

[*] posted on 25-9-2018 at 18:19


I needed more nitric acid to continue my experiments with plating, so I've got the still going. Noticed KNO2 and KNO3 precipitating out of the hose leading to my scrubber (traces of KOH solution in the hose used to load the scrubber).

20180925_220508_20180925221046262.jpg - 1.2MB

Jackson, that's a nice looking specimen there! Congrats on the find. Do you live in a volcanic area?

[Edited on 26-9-2018 by weilawei]
View user's profile View All Posts By User
Jackson
Hazard to Others
***




Posts: 189
Registered: 22-5-2018
Location: U S of A
Member Is Offline

Mood: :) Happy about new glassware :)

[*] posted on 26-9-2018 at 07:58


Quote: Originally posted by weilawei  

Jackson, that's a nice looking specimen there! Congrats on the find. Do you live in a volcanic area?

[Edited on 26-9-2018 by weilawei]


The area is Geothermally active with hot springs.
View user's profile View All Posts By User
MrHomeScientist
International Hazard
*****




Posts: 1803
Registered: 24-10-2010
Location: Flerovium
Member Is Offline

Mood: No Mood

[*] posted on 3-10-2018 at 07:53


NH4NO3 1.jpg - 398kB NH4NO3 2.jpg - 296kB

Recrystallizing some ammonium nitrate from solution in tap water. I used this as a demonstration of temperature change, by "dissecting" cold packs, for students, and throwing it away seemed like a terrible waste. :D


I've been steadily boiling off the water and the solution gradually turns yellow for some reason. I also notice cubical crystals starting to grow on top of the nice long rods:

NH4NO3 3.jpg - 592kB

What are those? Does ammonium nitrate have several different crystal habits (is that even possible?)? I wouldn't think tap water has enough impurities to make so many large crystals.
View user's profile Visit user's homepage View All Posts By User
Sigmatropic
National Hazard
****




Posts: 297
Registered: 29-1-2017
Member Is Offline

Mood: No Mood

[*] posted on 3-10-2018 at 20:59


Did you boil off the water in a metal pan? If so I believe the yellow color is from Fe3+. No idea what the cubical crystals are but can confirm it crystallizes as needles from a hot solution. Perhaps try to crystallize some by slow evaporation at RT, it might be a hydrate which only crystalizes belowa certain temperature (as with citric acid for example).
View user's profile View All Posts By User
MrHomeScientist
International Hazard
*****




Posts: 1803
Registered: 24-10-2010
Location: Flerovium
Member Is Offline

Mood: No Mood

[*] posted on 4-10-2018 at 05:49


No, it was all done in glass. It's possible there was iron in the tap water that's been concentrated; I started with something like 16 liters of solution, and am now down to about 3. All those pictures were crystals from cooling off of hot solution - I stopped boiling, filtered into a new container, let sit to cool, and the crystals grew. I could take a sample of the now-saturated solution to evaporate it and see what it does.
View user's profile Visit user's homepage View All Posts By User
Jackson
Hazard to Others
***




Posts: 189
Registered: 22-5-2018
Location: U S of A
Member Is Offline

Mood: :) Happy about new glassware :)

[*] posted on 4-10-2018 at 17:24


Some sulfur i recrystalized from garden sulfur.

734D3AA1-2E71-43C3-90DC-17321A13E4A8.jpeg - 1.4MB
View user's profile View All Posts By User
greenlight
International Hazard
*****




Posts: 663
Registered: 3-11-2014
Member Is Offline

Mood: Energetic

[*] posted on 15-10-2018 at 10:15


Not really chemistry but still interesting to look at. Some still pics I found on an old device from when I started making larger aerial shells and was experimenting with the top-fusing method.
The quickmatch fuse lights the delay on the top of the shell in the first pic which in turn lights a second piece of quickmatch piped down the side of shell and ignites what would be the lift charge in the second photo.

[Edited on 15-10-2018 by greenlight]

Screenshot_2017-09-08-20-20-21.png - 2.1MBScreenshot_2017-09-08-20-20-30.png - 2.1MB




The only use for an atomic bomb is to keep somebody else from using one.
George Wald
View user's profile View All Posts By User
weilawei
Hazard to Others
***




Posts: 130
Registered: 3-12-2017
Member Is Offline

Mood: No Mood

[*] posted on 16-10-2018 at 18:24


A small amount of bromine in aqueous solution.

signal-2018-10-16-220202.jpg - 256kB
View user's profile View All Posts By User
Gooferking Science
Hazard to Self
**




Posts: 97
Registered: 17-7-2013
Location: Somewhere in Kansas, USA...
Member Is Offline

Mood: Halogenated

[*] posted on 21-10-2018 at 19:08


Freshly deposited iodine crystals.

Iodine.jpg - 4.6MB




Check out my YouTube channel! www.youtube.com/user/gooferking
View user's profile Visit user's homepage View All Posts By User
 Pages:  1  ..  60    62    64  ..  71

  Go To Top