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Author: Subject: Pretty Pictures (1)
neptunium
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[*] posted on 3-3-2013 at 13:22


i know this is not chemistry but i think its pretty too...and its still science!
made an xray machine...this is my hand...

handX2 - Copy.bmp - 108kB

a smoke detector...

smokedetectorX.bmp - 108kB

and a playstation2 controller..

ps2cotrollerX.bmp - 108kB




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kristofvagyok
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[*] posted on 3-3-2013 at 14:01


We have just made some metallic silver from scrap, approx. 250g with a ~99,99% purity.

It was melted in a ceramic crucible with an oxygene/methane torch, under circa 1h. The silver was liquified under a layer of borax (it prevents the oxidation of the molten silver). After all have melted we just dropped it in a bucket of water and took out this shiny lump of this beautiful metal.

[url=http://labphoto.tumblr.com]
[/url]












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-Pictures from chemistry, check it out(:

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neptunium
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[*] posted on 3-3-2013 at 17:47


nice! solid chunk of Ag!



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mr.crow
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[*] posted on 3-3-2013 at 20:53


Are those stray pixels from x-rays hitting your camera sensor? Yikes

I can't imagine what it was like for Rontgen to expose the first x-ray picture and see the bones showing.




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neptunium
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[*] posted on 4-3-2013 at 05:24


the camera was protected somewhat from too much radiations, and was aimed at a mirro reflecting the fluorescent screen ....
but yes those pixels are being fried you can tell the protective screen was not high enough in the last picture!




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m1tanker78
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[*] posted on 5-3-2013 at 19:55
Iodine crystals


Yet another one of my forgotten experiments sitting on my work bench. I was going to throw the plastic bottle containing the solution in the trash until I saw some iodine crystals forming on the sides of the bottle. I plucked one out and did my best taking some macro shots with my cell phone camera. I also photographed a couple more right through the plastic bottle.











That last one looks wicked - like something I'd put at the end of a spear. I hope to be able to store the crystals once harvested.

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Mailinmypocket
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[*] posted on 6-3-2013 at 15:03


Not mind-blowingly pretty pictures, I thought they looked nice though :)

1: Copper turnings reacting with acidified thiourea solution (see "low pH oxidation of thiourea" thread for details.
2: Nitration of thymol in a hot (80c) water bath.

image.jpg - 70kB image.jpg - 57kB
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Eddygp
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[*] posted on 7-3-2013 at 12:54


Nitrating thymol... sounds amazing! Could you PM me with the procedure?



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Mailinmypocket
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[*] posted on 7-3-2013 at 14:49


Quote: Originally posted by Eddygp  
Nitrating thymol... sounds amazing! Could you PM me with the procedure?


For sure! I followed the procedure from "Systematic Lab Experiments in Organic Chemistry" by Arun Sethi. The process is to dissolve 200mg thymol in 2ml 98% H2SO4. Once this is done add 4 ml of a nitrating mixture composed of 2ml conc HNO3 and 2ml conc H2SO4. Heat on a hot water bath for 15 minutes, filter, wash with cold distilled water, and recrystallize from dilute HCl if desired. I obtained about 215mg of the crude product.

Link to the book in question: http://books.google.ca/books/about/Systematic_Laboratory_Exp...



[Edited on 8-3-2013 by Mailinmypocket]
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Morgan
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[*] posted on 9-3-2013 at 18:59


I saw this post the other day on Reddit.
http://imgur.com/sIDB73G
http://www.reddit.com/r/pics/comments/19voto/this_rock_crack...

[Edited on 10-3-2013 by Morgan]
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[*] posted on 9-3-2013 at 19:51


Quote: Originally posted by Morgan  
I saw this post the other day on Reddit.
http://imgur.com/sIDB73G

What type of mineral could that be??
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Morgan
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[*] posted on 9-3-2013 at 20:34


I found a rock that kind of has the same strange melted look to it. It's not like a typical quartz or obsidian where the surface is glassy smooth, but rather plastic looking almost with little bits of color if you turn it this way and that. It's a strange texture like that rock. It's kind of hard to see in these photos but maybe you can make it out. Perhaps metal oxide interference is making the hints of color in my rock, very faint glints and flecks, some inside the fissures.


Pink Glint.JPG - 76kBColor in fracture.JPG - 78kBFaint Speckles.JPG - 78kB
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[*] posted on 9-3-2013 at 20:47


Maybe apatite (a calcium phosphate mineral)? Where did you find it?
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[*] posted on 9-3-2013 at 20:55


Quote: Originally posted by Morgan  
I found a rock that kind of has the same strange melted look to it. It's not like a typical quartz

I found just such a rock at a construction site when I was a child too. It looked almost like a broken piece of glass, but the crystal cleaved along a horizonal plane.

[Edited on 10-3-2013 by AndersHoveland]
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[*] posted on 10-3-2013 at 05:56


Morgan, it looks like a piece of shattered tempered glass subjected to atmosphere for quite a long time. Hence the iridescence.
At first, when I saw the thumbnails, I thought it might fluorite, but upon closer look, it does look too glassy.




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[*] posted on 10-3-2013 at 06:48


I was thinking the waxy look of the surface is as if a piece of glass or quartz was flash heated to smoothen the surface. The glossy luster isn't like the flat face of a crystal, but having slight ripples in places too.
It might something like this and because it's clear, I didn't recognize how obsidian kind of has those ripples in places. A few months ago I decided to crack apart a large rock of black obsidian to see what kind of cutting tool would come about. A nice 10cm edge broke off that was very sharp. The thinness of the glass where it was sharp was a lighter smokey color instead of a black opacity in bulk.
http://en.wikipedia.org/wiki/File:Conch_fract_glass.jpg
http://en.wikipedia.org/wiki/Conchoidal_fracture

"Several researchers have used scanning electron microscopy to determine the effect of heat treatment on cherts, a variety of microcrystalline quartz."
"They found that heat-treated cherts fracture to form much smoother surfaces. In unheated cherts, a fracture goes around the grains and microcrystals, leaving a rough surface. In heated cherts, the fracture goes through the microcrystals themselves, which results in a much smoother surface. This smoother surface reflects light more evenly and produces an increased surface luster or "greasy" texture that is quite visible and serves as an indication of heat treatment."
http://donsmaps.com/heatflint.html
http://donsmaps.com/images3/conchoidal.jpg


[Edited on 10-3-2013 by Morgan]
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[*] posted on 11-3-2013 at 12:18


Needing 10g of NH4Cl I titrated 10% NH4OH with ~6M HCl to a methyl red endpoint (pH = 4). I then placed the solution in my family room window sill. After a couple days crystals are now forming:



NH4Cl crystallization.JPG - 136kB




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[*] posted on 11-3-2013 at 12:57


I have a 10...15 kV DC generator. This is the device:



device.jpg - 74kB


When it is switched on, then the little wire at the left of the device shows a purple glow and makes a soft hissing noise. You also can feel a wind coming from this wire. It is a corona discharge:



corona-closeup-long-exposure-2.jpg - 43kB

This is quite spectacular. There is only one end, the current simply flows through the air! The other end is at the other wire, shown in the picture of the device.

I intend to use this device for high voltage experiments with gas discharge tubes.

[Edited on 11-3-13 by woelen]




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[*] posted on 11-3-2013 at 13:13


Quote:
. . . makes a soft hissing noise.

"Soft" is a four-letter word, woelen . . .

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[*] posted on 11-3-2013 at 13:24


. . . and you're playing with (St. Elmo's) fire!
The small amounts of ozone produced are good for air-cleaning a smoky room, and such.

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[*] posted on 11-3-2013 at 13:29


Is that really a DC generator? I've heard that only AC produces this one-wire-glow. I might be wrong.



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[*] posted on 11-3-2013 at 19:14


Quote: Originally posted by Magpie  
Needing 10g of NH4Cl I titrated 10% NH4OH with ~6M HCl to a methyl red endpoint (pH = 4). I then placed the solution in my family room window sill. After a couple days crystals are now forming:


Ammonium chloride makes such nice snowflake crystals. I filmed a video of a saturated solution cooling, looked like a blizzard in a flask




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[*] posted on 12-3-2013 at 06:17


Quote: Originally posted by Adas  
Is that really a DC generator? I've heard that only AC produces this one-wire-glow. I might be wrong.


indeed you are! 10-15Kv AC is fun but will not generate the wind of charged particles mentioned above. only DC can do that.
I have a 40Kv for the Xray machine and a 100Kv for other stuff...
if you like to play with vacuum tubes and high voltage you should totally get you a Cockrof Watson ladder!
10-15 Kv is the lowest you can do anything with you've got to get more volts!!




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[*] posted on 19-3-2013 at 13:28


A mind-blowing photograph of the eruptions of <a href="http://en.wikipedia.org/wiki/Sakurajima" target="_blank">Sakurajima Volcano, Japan</a> <img src="../scipics/_wiki.png" />, February 2013, taken by <a href="http://www.mrietze.com/web13/japan13.htm" target="_blank">Martin Rietze</a> <img src="../scipics/_ext.png" />:
<img src="http://www.mrietze.com/images/japan13/Jp13-084-5DIIdet.jpg" />

<iframe sandbox width="560" height="315" src="http://www.youtube.com/embed/XTns__G_F1U" frameborder="0" allowfullscreen></iframe>
(Note; the audio is re-synced to match the visual.)

[Edited on 7/9/13 by bfesser]




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[*] posted on 20-3-2013 at 12:59


Brassy, gold rain. More of a "golden rain" because in fact there is no gold in there.


gold_rain1.JPG - 35kB

gold_rain2.JPG - 60kB



Ever heard of those drinks with parcicles of gold inside which worth a fortune? Now you can have it!Or tell your friends you do (at least).
(ammonium)? ferrous phosphate suspension.
(looks nasty, I've put too much a dosage)
Thanks rstar from whom the idea has been stolen! :D




[Edited on 20-3-2013 by platedish29]
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