Chromatography

[Jessica]

Please help me with these questions....
1. Photosynthesis requires the green pigment chlorophyll. Explain how a Japenese maple tree, having red leaves, can carry on photosynthesis.

2. Many trees have leaves that are green in the summer and red, yellow, or orange in the autumn. Where were these colors during the summer? Why do they suddenly appear in the autumn?

3. In addition to separating plant pigments, what are some other possible applications for paper chromatography?

[sosia]

Read your school book first, the answers must be there
I help you with the first one:
1.- Read this and find the sentence you want.
do red leaves .... (http://ianramjohn.wordpress.com/2008/01/30/do-red-leaves-photosynthesise/)

[LRW]

3. You can use thin-layer chromatography for a lot of things in the forensic field, like ink examination- determining what kind of pen was used to write something found at a crime scene. You can use it to help identify drugs such as heroin and quinine. Helps to identify petroleum product as well. the method is so sensitive that you can use less than 100 micrograms of suspect material for such comparisons. Most of what happens when components separate is colorless, our eyes can't see it, but if you shine ultraviolet light on it, it [the components] will appear.

[Jessica]

I got the answers in class but thanks anyways :)