German Ebook 'Isolierung und Charakterisierung von Naturstoffen' available

This is a great book, thank you very much for scanning it & making the effort!
I hope you don't mind if some of that will be implemented in the biochem section - I will do the translation then!
I've always been fascinated by isolating substances from natural things - and here is one describing exactly that!
Thanks again!

PS Did you know that the extract from mallow (Ger: Malve) flowers contain a derivative of 1 R, 3, 5 methoxy, 4 hydroxy benzene? The R being the derivative?

Or, who would have thought that the black pepper component contains a derivative of piperidine, which should be easily extracted by hydrolysis? --> Oh... you already had the idea in lambdasyn


[Edited on 15-3-2005 by chemoleo]

Quote:

Originally posted by chemoleo PS Did you know that the extract from mallow (Ger: Malve) flowers contain a derivative of 1 R, 3, 5 methoxy, 4 hydroxy benzene? The R being the derivative?

A quick search with google doesn't brought up any information about a possible conversion of malvidin to syringaldehyde (if this was the intention of your wink ). Maybe someone here will find a way to make something useful out of the malvidin.

garage chemist:

I've seen it before - it's ok, but it could be more liberal IMO. I already wondered who might be the person, who recommended LambdaSyn and MSDB there, until I read two quite similar posts from profi there and garage chemist here. This now confirms my suspicion

What do you mean by "more liberal"? Discussion of explosives will always be forbidden in german forums though, it's just too illegal.

I just recommended your book there, too.

Discussion of explosives synthesis is restricted on versuchschemie.de.
This is due to german law and the serious ambitions of the admin, who's more of a interested hobby scientist and not an amateur terrorist
Nevertheless, at this time it's one of the biggest german sites on chemistry, and it's free especially for newbies. If you dare to take a peek at a german sub-culture, you're very welcome there !

Most countries(well, at least Canada), have a law that allows the preparation of energetics in laboratory conditions.

A Canadian law:
":34. A person may, for the purpose of laboratory chemical experiment
and not for practical use or sale, make a small quantity of explosive
in a place that is not a licensed factory if reasonable precautions
are observed to prevent injury to persons or damage to property and
if the provisions of the Act and these Regulations are observed as
far as they are otherwise applicable."

Of course, the difficulty is always to convince the authorities that you are making for experimental purposes only, and that what you have in your basement/garage counts as a lab.

EDIT: note the word 'person' and how it is not 'professional chemist'

[Edited on 16-3-2005 by rogue chemist]

1. Experience shows us that especially the younger hobby scientists in fact do abuse the knowledge they get from the internet. There's no denying that in most cases knowledge equals a motivation for abuse !
2. I agree with you when you say many common items are more dangerous than small quantities of chemicals in a hobbyist's hands, but people seem to be paranoid when they are confronted with chemistry (= a thing most people don't understand !).
The other point is, if one has succeeded to create a small-scale explosion, there's no reason one should not be able to create a HUGE explosion. That's why even small-scale explosive chemistry is feared and prohibited.
The answer to your bow and arrow analogy is simple: with a bow and arrow you can hurt or even kill one person per arrow. The same is true for most of the "dangerous" everyday items. For explosives the figure looks a little different...that's one reason german law prohibits non-professional manufacture, handling and usage of explosives.
3. Playing with EMs is a funny thing to do if you know the risks, treat the materials with respect and have enough common sense for not hurting yourself or someone else. Unfortunately, most teens lack these abilities. And it's especially teens who seek their thrill in EMs....
My position is clear: everybody who wants to experiment with EMs must gather the information on his own and learn to deal with chemistry STEP BY STEP. There's no use in spreading recipes and motivate kids to blow their frickin' heads off. I am ready to answer questions concerning safety precautions and theoretical details but I would never deliver a recipe for EMs to a completely unknown person.
4. I know very well that the chemistry grandfather's fooled around ("investigated" EMs containing Nitrogen etc. But that was in times when the whole explosives crap wasn't yet developed and explored. Today we find ourselves in a completely differrent situation ! The guys who hang around in internet forums and collect every explosive formula they can get their hands on definitely DO NOT conduct any research. They don't create anything new, they simply reproduce ! And that has nothing to do with scientific engineering. With curiosity - yes, fun - too, but not with scientific work.

can anybody up this book

rapidshare link is down