Help: Is species identification _at_ IR range useful?

[cindywoo]

Help: Is species identification _at_ IR range useful?

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Post by cindywoo » Thu Sep 21, 2006 1:25 am

Hi, does any one know whether species identification _at_ IR range useful?

I wonder if there are any important species (bacterias, antibodies, antigens, markers for cancers ...) which have their characteristic spectra at IR range?

Thanks a million~

[zami'87.]

Re: Help: Is species identification _at_ IR range useful?

• Quote

Post by zami'87. » Thu Sep 21, 2006 10:33 am

Hi, does any one know whether species identification _at_ IR range useful?

I wonder if there are any important species (bacterias, antibodies, antigens, markers for cancers ...) which have their characteristic spectra at IR range?

Thanks a million~

To find structure of molecule u use:
IR spectroscopy is used for determing functional groups in molecule(eg. OH group)
NMR(nuclear magnetic resonance) is used for determing the structure of hydrocarbon chain-fingerprint region(wich can be part of given molecule)


Maybe it is useful for species that produce specific chemical compounds...but it's not so trustful...use other methods beside it

[cindywoo]

Re: Help: Is species identification _at_ IR range useful?

• Quote

Post by cindywoo » Fri Sep 22, 2006 12:20 am

Hi, does any one know whether species identification _at_ IR range useful?

I wonder if there are any important species (bacterias, antibodies, antigens, markers for cancers ...) which have their characteristic spectra at IR range?

Thanks a million~

To find structure of molecule u use:
IR spectroscopy is used for determing functional groups in molecule(eg. OH group)
NMR(nuclear magnetic resonance) is used for determing the structure of hydrocarbon chain-fingerprint region(wich can be part of given molecule)


Maybe it is useful for species that produce specific chemical compounds...but it's not so trustful...use other methods beside it

Thanks, Zami:)

About the IR spectroscopy you mentioned, I think in its case, "IR" refers to the light source the measurement employs, but does not refer to the spectra range of the species. So IR spectroscopy might also give us the specta in ranges other than IR.

I am really curious about wheter there are any species which have there characteristic spectra/ vibrations _at_ IR range, so we can use spectra of 1~5(micron)/ 10000~2000(cm-1) for identification of them Actually I just have a physics background, not biology, so U see, I have totally no idea of which kinds of species to look for... some lipids, some toxins, or some cancer markers...? @lost...

[oppox]

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Post by oppox » Fri Sep 22, 2006 8:42 am

hmmm I dont know anything about IR and I dont know if anyone in my corridor use it, we use CD to get a picture of the structure. But when I used to work in the lab at a dairy we used IR to determine how much fat the milk and so on contained.

[cindywoo]

• Quote

Post by cindywoo » Sun Sep 24, 2006 10:07 am

hmmm I dont know anything about IR and I dont know if anyone in my corridor use it, we use CD to get a picture of the structure. But when I used to work in the lab at a dairy we used IR to determine how much fat the milk and so on contained.

Oh? To determine how much fat the milk might have contained? Mmm... Sounds interesting:) Yup, you are right, IR might have its greatest applications in the food industry! And I know that there are some guys using IR technique to check if so-called "pure" olive oil is adulterated!

Thanks Oppox:)