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Picric Acid and the Mystery of the Red Goo
[quote][i]Originally posted by halogen[/i]
PS: The oxygen that links the two major rings in sucrose ... |
21-7-2005 at 22:46
by: Quince |
Picric acid: different instructions
Look [url=http://66.102.7.104/search?q=cache:dpeYGBNwnfgJ:members.dancris.com/~bfraser/etc/CopperAsp ... |
21-7-2005 at 22:25
by: Quince |
Picric acid: different instructions
The aspirin here contains triacetin, which is soluble in alcohol. How would one separate this from ... |
20-7-2005 at 20:14
by: Quince |
Picric acid: different instructions
The only high percentage alcohol available here is isopropyl alcohol. However, every time I've ... |
15-7-2005 at 14:46
by: Quince |
Picric acid: different instructions
I was using generic ASA tablets. I initially filtered after soaking in a bit of water to dissolve t ... |
14-7-2005 at 23:38
by: Quince |
Direct gold-plating on copper
I scratched the spades. There's no nickel in between, but the gold plating is visibly thick. ... |
11-7-2005 at 07:48
by: Quince |
Direct gold-plating on copper
What does it mean to passivate? In what sense is it unstable (i.e. what are the decomposition produ ... |
11-7-2005 at 06:07
by: Quince |
Direct gold-plating on copper
No, the pins are bare silver (Neutrik NC3FX, etc.). XLRs were designed to be self-cleaning, which i ... |
11-7-2005 at 02:22
by: Quince |
Direct gold-plating on copper
http://www.infoplease.com/ce6/sci/A0841741.html
[quote]is dissolved in hot concentrated sulfuric ac ... |
11-7-2005 at 01:38
by: Quince |
Direct gold-plating on copper
That's weird. My XLR connectors have bare silver pins and there's no visible tarnish afte ... |
11-7-2005 at 00:00
by: Quince |
Direct gold-plating on copper
I've noticed that almost all gold-plated connectors are made of brass instead of copper. Is th ... |
10-7-2005 at 20:43
by: Quince |
PbO2
12AX7, there won't be crystallization until almost all the water is gone if it's very warm ... |
10-7-2005 at 19:05
by: Quince |
PbO2
I was evaporating the water from the lead acetate I prepared by boiling in the microwave. Unfortuna ... |
10-7-2005 at 18:11
by: Quince |
Vacuum furnace?
So electrolysis of H2SO4, then addition of NaOH should do it. How do I split the cell, if I don ... |
28-6-2005 at 02:40
by: Quince |
Vacuum furnace?
So should I initially try the same temperature/baking time for Pt on W as was used for Pt on Ta in t ... |
28-6-2005 at 00:37
by: Quince |
Vacuum furnace?
Well, I fail to grasp any information from these. Where does the 1100*C number in the patent figure ... |
27-6-2005 at 21:48
by: Quince |
Vacuum furnace?
I've been there. I couldn't manage to spend more than a few days in Amsterdam before the ... |
27-6-2005 at 14:37
by: Quince |
Vacuum furnace?
I don't see disposable tanks around here. The cheapest thing I've found is this http://ww ... |
27-6-2005 at 12:55
by: Quince |
Vacuum furnace?
12AX7, please post here the Ta-Pt and W-Pt diagrams from your source for comparison. I do have Ta, ... |
27-6-2005 at 03:05
by: Quince |
Vacuum furnace?
Halogen bulbs have no mercury. They have halogen gas that redeposits evaporated tungsten back onto ... |
26-6-2005 at 16:23
by: Quince |
Tantalum
So if I found an old car battery that could still be charged, I should be able to get PbO2 from it? |
26-6-2005 at 16:17
by: Quince |
Vacuum furnace?
Quartz: I know that a lot of halogen lights have bulbs made out of quartz, but does that apply to al ... |
26-6-2005 at 01:32
by: Quince |
Vacuum furnace?
What are you guys talking about? A discharge requires some sort of medium to be ionized between the ... |
25-6-2005 at 21:48
by: Quince |
Vacuum furnace?
[quote][i]Originally posted by neutrino[/i]
I don't see why just ordinary argon wouldn't ... |
25-6-2005 at 12:21
by: Quince |
Vacuum furnace?
What I need is such heating in an inert atmosphere for the process in patent US4240878. Also, I ... |
25-6-2005 at 02:12
by: Quince |
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