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Old 05-04-2003, 03:32 PM
Kim
 
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Default color change in coleus, chromatoghraphy, ploar chlorophyll

I need help with my bio work

1. After boiling a coleus leaf in water a substance cuased a color change.
Why and what was the name of the substance?

2. Which is more reliable when analyzing the results of the chromatoghraphy
lab, the color of the spot or the Rf value?

3. from a plants piont of view what would happen if chlorophyll was polar?




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Old 05-04-2003, 03:32 PM
David Hershey
 
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Default color change in coleus, chromatoghraphy, ploar chlorophyll

Here's some hints:

1. Try a goggle.com search for: red cabbage anthocyanin

2. If two compounds are the same color, how could you tell them apart?

3. Consider what other pigments plants contain, their polarity
compared to chlorophyll and how the other pigments behave compared to
chlorophyll. The hint in #1 also applies here.


David R. Hershey

"Kim" wrote in message .. .
I need help with my bio work

1. After boiling a coleus leaf in water a substance cuased a color change.
Why and what was the name of the substance?

2. Which is more reliable when analyzing the results of the chromatoghraphy
lab, the color of the spot or the Rf value?

3. from a plants piont of view what would happen if chlorophyll was polar?

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Old 05-04-2003, 03:32 PM
Andy_Bettany
 
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Default color change in coleus, chromatoghraphy, ploar chlorophyll

Kim,

In response to David's reply:

You might want to make that a "gOogle.com" search!


--
Dr. Andy Bettany
Research Scientist
Institute of Grassland and Environmental Research
Plas Gogerddan
Wales, UK


"David Hershey" wrote in message
om...
Here's some hints:

1. Try a goggle.com search for: red cabbage anthocyanin

2. If two compounds are the same color, how could you tell them apart?

3. Consider what other pigments plants contain, their polarity
compared to chlorophyll and how the other pigments behave compared to
chlorophyll. The hint in #1 also applies here.


David R. Hershey

"Kim" wrote in message

.. .
I need help with my bio work

1. After boiling a coleus leaf in water a substance cuased a color

change.
Why and what was the name of the substance?

2. Which is more reliable when analyzing the results of the

chromatoghraphy
lab, the color of the spot or the Rf value?

3. from a plants piont of view what would happen if chlorophyll was

polar?




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