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L-tryptophan decarboxylation
Bipolar! I'd try sublimation in this case.
I tried sublimating various compounds a while ago and ... |
5-4-2019 at 12:15
by: Pumukli |
Any interesting uses for dimethylglyoxime?
Dear UC235,
Could you elaborate a bit on why did you suggest using HCl as an acid for the distill ... |
22-3-2019 at 11:46
by: Pumukli |
Lead acetate decahydrate?
The standard potential of Pb is -0.125 V or about so it dissolves in vinegar even without the extra ... |
7-2-2019 at 10:05
by: Pumukli |
Rusty ball thermit
I've found this interesting thermit demonstration experiment and uploaded it here for your entertain ... |
28-1-2019 at 10:13
by: Pumukli |
Black humour (?) of Victorian chemists
I like very much reading the "obituary notices" of the (Royal) Chemical Society too. They are really ... |
26-1-2019 at 13:50
by: Pumukli |
Black humour (?) of Victorian chemists
They could devote the proper ammount of time for a measurement:
"The ammonium nitrate used was pu ... |
26-1-2019 at 09:04
by: Pumukli |
Proline decarboxylations
Thanks for the patent!
I've seen this somewhere but dismissed on the basis of non-amateur-friendl ... |
20-1-2019 at 11:42
by: Pumukli |
Proline decarboxylations
Thanks AvBaeyer for the tips.
What I have says L-carvone , food grade, min 97% on the bottle. BUT ... |
19-1-2019 at 00:41
by: Pumukli |
Glassware safety with 22.5 micron vacuum pump
Flat surfaces and vacuum are not a friendly combo as I heard. I'd never put a flat bottom anything t ... |
18-1-2019 at 05:33
by: Pumukli |
Proline decarboxylations
You remember that I used spear mint oil in the first series of tests but wanted to sound more scient ... |
18-1-2019 at 05:20
by: Pumukli |
Proline decarboxylations
I thought I would get more criticism by now. Over 2000 views and not a single frown upon. :-)
Any ... |
17-1-2019 at 06:54
by: Pumukli |
Preparation of Diethyl Sulfate
I tried to save you a journey to the library and downloaded that Berichte article - because all issu ... |
7-1-2019 at 22:46
by: Pumukli |
Preparation of Diethyl Sulfate
Magpie, I fished out this one:
"Solution of Ethylen in Sulphuric Acid
By Buttlerow and Gorgainow ... |
7-1-2019 at 12:31
by: Pumukli |
Black humour (?) of Victorian chemists
Nice find, S.C.Wack! :-)
I found this today:
"The pure metanitrobenzoic acid melts at 145 C, f ... |
7-1-2019 at 12:19
by: Pumukli |
Nicotinamide dehydration
Thank you for the tips!
As I started this thread I would like to append another reference here to ... |
7-1-2019 at 11:58
by: Pumukli |
Nicotinamide dehydration
I tried to prepare nicotinonitrile (3-cyano-pyridine) recently but failed.
At first I tried simpl ... |
6-1-2019 at 11:45
by: Pumukli |
How to repair a thermocouple?
I have a thermocouple at the end of a meter long wire-pair, (thermometer sensor.) Unfortunately one ... |
6-1-2019 at 10:38
by: Pumukli |
Preparation of Diethyl Sulfate
Magpie,
I came across the following article a few minutes ago:
On the production of the sulpha ... |
6-1-2019 at 09:30
by: Pumukli |
Black humour (?) of Victorian chemists
"So what actually Ethylic potassiocyanacetoacetate is?"
It is the following compound:
CNCH[sub ... |
27-12-2018 at 00:40
by: Pumukli |
Black humour (?) of Victorian chemists
In the above article can be found the following too:
"Ethylic potassiocyanacetoacetate crystallyz ... |
26-12-2018 at 13:05
by: Pumukli |
Black humour (?) of Victorian chemists
I love reading the work of chemists of the 1800-ies. I found e.g. "porous plate" a few days ago.
... |
26-12-2018 at 11:08
by: Pumukli |
Porous plate
After two more old articles where W.H. Perkin used these plates it seems that these were used instea ... |
23-12-2018 at 17:09
by: Pumukli |
Porous plate
Yes, frit comes to mind, but they never mention"vacuum" or "suction" or "filtration" in connection w ... |
23-12-2018 at 11:49
by: Pumukli |
Porous plate
What is the so called "porous plate"?
I've been reading old (circa 1900) chemistry papers recentl ... |
23-12-2018 at 10:35
by: Pumukli |
Best method for absorption or scrubbing of gases from air
You should take into consideration how much pressure drop would be acceptable in your system. The "c ... |
18-12-2018 at 10:13
by: Pumukli |
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