Sandbox Reserved 143: Difference between revisions

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-Chlorophyll molecules can be found in ancient sediments and used to help reconstruct past environments.
+Chlorophyll molecules can be found in ancient sediments and can be used to help reconstruct past environments.
 <applet load='Image:CL1_model.pdb‎' size='400' frame='true' align='right' caption='Insert caption here'
-scene='Sandbox_Reserved_143/1/1' />.
+scene='Sandbox_Reserved_143/1/1' />
-<scene name='Sandbox_Reserved_143/1/1'>Chlorophyll A</scene>
+The
+<scene name='Sandbox_Reserved_143/1/2'>structure</scene>
+of these biomarkers of past photosynthesis includes information on past growth conditions.
-<scene name='Sandbox_Reserved_143/1/2'>Ball and stick model of Chlorophyll A</scene>
+<scene name='Sandbox_Reserved_143/1/3'>Hydrogen</scene>
+is incorporated into the molecule during biosynthesis and the isotopic composition of the water within the cell at that time is reflected in the hydrogen isotopic composition of the final molecule.
-<scene name='Sandbox_Reserved_143/1/3'>Hydrogen</scene>
+The ratio of
+<scene name='Sandbox_Reserved_143/1/5'>deuterium</scene>
-<scene name='Sandbox_Reserved_143/1/5'>H isotopes</scene>
+to hydrogen of individual compounds can be determined by gas chromotography-isotope mass spectrometry.