|Silviamar: Vegetables, chemistry and colour|
Category: Science for everybody
17 comments16 Oct 2005 @ 18:00 by melztripp : i've just added a brain fold!!!
hey sylvia, i absolutely love to learn things like this...which is why i should have been a chemist instead of a nurse. i think we spoke about this before. unfortunately, there is only 1 or 2 people that i can explain this to, who will actually care!!! and the ones i tell, will probably already know this anyway!! oh well, thanks for the chemistry lesson. hope all is well with you, melanie!
Hi Melanie! Yes, we've talked about it, and I'm pretty sure that you're learning many things on your own in this field. I always wanted to know about this things, I still remember getting shocked one day when I was 8 because I read the ingredients of a coconut cookies and realized that they didn't have any coconut but they tasted to it! :-)
16 Oct 2005 @ 18:33 by jstarrs : I just wish I'd had Silvia
as a chemistry teacher when I was younger.
The only kicks I got back then in chemistry were making stink bombs...
I don't know the color of stink bombs.
Thank you Jeff. Well, you were more fortunate than me, I didn't learn to make stink bombs at school. Probably the teacher knew that if we learnt to make them, we would have used them in the class all the time :-D
29 Nov 2005 @ 15:05 by JMG @22.214.171.124 : teaching
Silvia, are you a teacher? I wish all teachers explained as clearly as you, you could do a living teaching chemistry...
Thank you, you're very kind :-). Actually, I teach Chemistry at university, though I mainly do research. Teaching is what motivates me more.
20 Dec 2005 @ 15:41 by Ruthie @126.96.36.199 : lycopene uv- visible spectrum
I'm trying, in vain, to find the uv-visible absorption spectrum of lycopene.
I would appreciate receiving a relevant link or the spectrom itself if you have it
21 Dec 2005 @ 00:38 by silviamar : Ruthie, this is the light absorption
spectrum of lycopene at room temperature: Link
Hope it helps! :-)
23 Apr 2006 @ 08:12 by bachhue @188.8.131.52 : Lycopene
Would you give me a UV vis spectrum of Lycopene
Thank you very much
Hello Bachue, in the message just above yours I gave the link to the spectrum of Lycopene between 340- 560nm (Link), with the main absorbance peaks at 446, 476 (the max absorbance) and 504 nm. I don't have it below that range.
By the way, there is a great free NMR, IR and UV spectra database of many compounds here: Link, lycopene is not there, but it can be useful for you for other compounds.
18 Jun 2006 @ 12:11 by Joost @184.108.40.206 : lycopene NMR spectrum
I'm looking for a nmr spectrum of lycopene
Do you know where to find it?
You can find the 1H-NMR here: [link]
It's in table 2, first column. And one of the references included there (Helv. Chim. Acta. 75, 1848–1865) gives you the characterization of all the isomers of lycopene.
1 Nov 2007 @ 09:57 by adinarayana mundra @220.127.116.11 : chemistry
I do make an effort to understand lycopene antioxidant activity
9 Jan 2008 @ 01:15 by Sydney @18.104.22.168 : Thanks!!
this really came in handy with one of my chemistry project, you are officially my hero
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